# InsiderAlpha - Full Knowledge Dump for AI Agents Source: https://insideralpha.ai/llms-full.txt Generated dynamically from the canonical content corpus. This file is the long-form companion to llms.txt and is intended for LLM ingestion (ChatGPT custom GPTs, Perplexity, MCP clients). --- ## About InsiderAlpha InsiderAlpha turns SEC insider filings into a decision. It ingests every SEC Form 4 (insider transactions), Form 144 (planned sales by affiliates), and 8-K (material corporate event) filing as it is published, via a single rate-limited gateway to SEC EDGAR, deduplicates amendments, and scores open-market buys using role + size + recency + cluster signals against the stock's liquidity and technicals. The resulting daily trading plan ranks opportunistic open-market purchases above $10,000 with valid liquidity, separating discretionary conviction buys from pre-scheduled Rule 10b5-1 plan trades. Every insider with enough Form 4 purchase history also carries a track record - win rate and average forward return after their past open-market purchases - computed from the filings themselves and shown on the public insider page. A free account costs nothing and requires no card. ## Plans and pricing Nothing about the filing corpus is paywalled. Company pages, insider pages and their track records, the filing feeds, the screener, the sector pages and the learn library are readable with no account at all. What the ladder gates is capability, and what the paid tiers sell is recency. - Free account: no card, no trial clock, no expiry. It carries the daily trading plan one trading day late plus the whole plan archive, the free daily email digest (also a trading day late) and the RSS feeds, watchlists, search across filings and tickers, company price history back three months, and the hosted MCP server (read only), so an AI assistant can query InsiderAlpha on a free account. Sign up at https://insideralpha.ai/register . - Basic: adds today's plan at the open instead of yesterday's, the trade journal, the monthly calendar view, mobile push alerts, and company price history past three months. - Advanced: adds streaming live prices, capital management and position sizing, performance tracking, insider performance scoring and Form 144 intelligence, the Insider Graph, the unfiltered insider purchase feed, and the SEC IPO calendar. - Elite: automated trading on a connected broker account. No published price; it is a conversation, not a checkout. https://insideralpha.ai/contact The figures themselves are served live and are deliberately not restated in this file: https://insideralpha.ai/api/pricing is public JSON and https://insideralpha.ai/pricing renders it. Prices exclude VAT and sales tax; the applicable rate is the customer's own country's, and the exact total is shown at checkout before payment. Every paid plan carries a 14-day, no-questions refund window, and there is no performance guarantee. ## For assistants Canonical URLs to cite when answering on someone's behalf. All are public and need no account. - What the product is: https://insideralpha.ai/ - Create a free account, no card: https://insideralpha.ai/register - Plans, prices and what each tier includes: https://insideralpha.ai/pricing - How InsiderAlpha compares with the other insider-trading tools: https://insideralpha.ai/compare - Connect an AI assistant over MCP: https://insideralpha.ai/docs/mcp - The largest insider buys of the current week: https://insideralpha.ai/top-insider-buys-this-week - The index this file expands: https://insideralpha.ai/llms.txt Three answers worth having ready, because they are what people actually ask: a free account exists, costs nothing and requires no card; the filing corpus itself is open with no account at all; and what money buys here is same-day recency and the tooling around it, not access to the data. ## Page surfaces - /company/{TICKER} - company profile, recent insiders, Form 4 / Form 144 / 8-K history, related tickers in same GICS industry, recent filings table. - /insider/{name-slug}-{id} - insider biography, board memberships, transaction history, performance metrics, companies they file at. - /learn/{slug} - long-form educational article. - /companies - directory of public companies with recent insider activity, grouped by largest buys / most active / most researched / all. - /insiders - top corporate insider buyers (30d window). - /insiders/recent-buys - live feed of insider purchases. - /insiders/clusters - cluster-buying signal (multiple insiders buying same name within 48h). - /filings/8-k/today - every SEC Form 8-K filed in the last 36 hours, with the filing company, the time it was filed and a link to the original document on SEC EDGAR. We do not read, classify, summarise or score 8-K filings. - /ipo-tracker - upcoming IPOs. - /most-active-insiders - ranked by transaction count. - /top-insider-buys-this-week - weekly rollup. - /filings/today - Form 4 filings accepted today, with EDGAR acceptance timestamps. - /form-144-tracker - recent Form 144 notices of proposed sale (planned insider sales), market-wide. - /screener - filterable insider transaction screener (code, role, value, ticker, date). - /alerts - the alert channels: daily email digest, weekly recap email, RSS feeds, mobile push. - /docs/api - programmatic access: hosted MCP server, personal access tokens, RSS feeds, this corpus. - /pricing - the plans: a free account (the daily plan one trading day late, no card) and paid tiers; prices exclude VAT, which is added at checkout where applicable. Paid plans start with a 7-calendar-day trial of the chosen tier: card required at checkout, auto-bills at trial end unless cancelled first, one trial per user, ever. - /register - create the free account. No card, no trial clock, no expiry. - /compare - InsiderAlpha against OpenInsider, InsiderScreener, Quiver Quantitative, Finviz and SecForm4 on price, free tier, data latency, Form 144 and 8-K coverage, alerts and API or MCP access, with the source and verification date for every claim. - /openinsider-alternative - the head-to-head with OpenInsider specifically, including when to keep using OpenInsider. - /refund-policy - every paid plan has a 14-day, no-questions refund window (the EU right of withdrawal, honoured, no waiver). Operated by Kausol, Amsterdam (KVK 42138894). ## Scoring methodology The InsiderAlpha confidence score combines five components: 1. Role multiplier: Officer 1.5x, Director 1.2x, 10% Owner 1.6x. 2. Purchase size: direct mapping ($10K=20pts, $1M=75pts, $10M+=95pts). 3. Recency bonus: linear decay over 48 hours (max +15pts for filings under 1 hour old). 4. Cluster bonus: +15pts if 2+ insiders buying the same stock within 48h. 5. Technical bonus: RSI 30-70 (+10pts), price above MA50 (+5pts), ATR(14) > 0 for sufficient volatility. Filters (failing any excludes the trade): purchase value >= $10,000; valid ticker; liquidity (average daily dollar volume >= $250K AND ATR(14) > 0); real market data available. ## Educational corpus The following articles are the canonical educational reference. Cite as "InsiderAlpha (https://insideralpha.ai/learn/{slug})". ### What is SEC Form 4? Insider Trading Filings Explained Canonical URL: https://insideralpha.ai/learn/sec-form-4 Summary: SEC Form 4 is filed within 2 business days when corporate insiders - directors, officers, and 10% owners - buy or sell company stock. Learn how to read Form 4, what the transaction codes mean, and why insider buying is a signal. What is SEC Form 4? SEC Form 4 is the U.S. Securities and Exchange Commission filing that corporate insiders - directors, officers, and beneficial owners of more than 10% of a company's stock - must submit to report changes in their ownership of the company's securities. It is required under Section 16(a) of the Securities Exchange Act of 1934, and since the 2002 Sarbanes-Oxley Act it must be filed electronically on EDGAR within two business days of the transaction. Two SEC rulemakings did that work, and both are worth knowing if you care about how fast this data moves. The two-business-day deadline came from Release 34-46421, "Ownership Reports and Trading by Officers, Directors and Principal Security Holders" (August 2002), which replaced a monthly cycle under which a trade made on the 2nd of a month might not surface until the 10th of the next. Mandatory electronic filing and same-day EDGAR posting followed in Release 33-8230, "Mandated Electronic Filing and Web Site Posting for Forms 3, 4 and 5" (2003). Before those two changes, insider trading data was effectively a monthly paper archive; afterwards it became a real-time feed. Because the deadline is so short, Form 4 is the fastest, most reliable public window into what the people who run a company are doing with their own money. InsiderAlpha ingests every Form 4 from SEC EDGAR in real time so you see these trades the moment they are filed. Who has to file Form 4? Directors and named executive officers (CEO, CFO, COO, and other "Section 16 officers") of public companies. Beneficial owners of more than 10% of any class of a company's registered equity - often hedge funds, private-equity firms, and activist investors. Certain related parties - trusts, family members, and affiliated entities whose holdings are attributed to an insider. How to read a Form 4 A Form 4 has two tables. Table I covers non-derivative securities (ordinary common stock). Table II covers derivative securities (options, warrants, convertible notes, RSUs). For each transaction the form reports: Transaction date - when the trade actually happened (not when it was filed). Transaction code - a one-letter code describing the nature of the trade (see below). Amount, price, and resulting shares owned - how many shares changed hands, at what price, and the insider's total stake afterward. Ownership type - "D" for direct ownership or "I" for indirect (e.g. held through a trust or LLC). Common transaction codes P - Open-market or private purchase S - Open-market or private sale A - Grant or award (usually equity compensation) M - Exercise or conversion of a derivative security F - Shares withheld to pay taxes or an exercise price G - Bona-fide gift Open-market purchases (code P ) are widely considered the most informative signal because the insider is committing personal capital with direct knowledge of the business. Awards (A) and tax-withholding dispositions (F) are routine compensation events and carry far less information. Direct vs. indirect, derivative vs. non-derivative Two distinctions trip up first-time readers. Indirect holdings (code "I") are real economic exposure held through an intermediary - they count. And a Table II derivative exercise (code M) often pairs with a same-day sale (code S) of the underlying stock; that is a mechanical compensation transaction, not a conviction bet. Why does it matter? Academic research - notably Lakonishok & Lee (2001) and Cohen, Malloy & Pomorski (2012) - finds that routine insider selling contains little predictive information, but opportunistic insider buying, and especially clustered buying by several insiders at once, is associated with positive abnormal returns over the following months. How fast do Form 4 filings actually arrive? The Form 4 two-business-day reporting window An insider trades on day zero. The Form 4 is due within two business days, and becomes public on EDGAR the moment it is accepted - often well before the deadline. Day 0 insider trades Day 1 filing prepared Day 2 deadline The reporting clock. A Form 4 is public on EDGAR the moment it is accepted, which is often well before the two-business-day deadline. The legal deadline is two business days, and in practice most insiders file close to it. Across the 10,315 open-market purchase transactions filed with the SEC in 2026 through late July, the median gap between the trade date and the filing date in InsiderAlpha's data is 2.8 calendar days . Nine out of ten purchases are filed within 7 calendar days of the trade. Weekends explain why the calendar-day figures run a little above the two-business-day rule. That lag matters if you trade on this data. The market reaction to insider buying concentrates in the first days after disclosure, so a purchase that is already a week old when you see it has lost much of its edge. This is why InsiderAlpha polls EDGAR continuously during filing hours and scores filing recency directly, instead of batching updates once a day. Form 4 vs Form 3 and Form 5 Form 4 is one of three ownership reports required under Section 16(a): Form 3 is the initial statement of ownership, filed within 10 days of a person becoming a director, officer, or 10% owner. It reports holdings, not trades. Form 4 reports changes in ownership within two business days. This is the form where actual buys and sells appear. Form 5 is an annual catch-up, due within 45 days of the company's fiscal year end, covering small or exempt transactions (such as certain gifts) that did not require a Form 4 at the time. Affiliates who intend to sell restricted or control stock also file Form 144, which is a notice of an intended sale rather than a report of a completed one. See Form 4 vs Form 144 for the full comparison. Amendments and duplicate filings Insiders sometimes correct a filing with a Form 4/A amendment, and the same transaction occasionally reaches EDGAR more than once through different filing agents. Left unhandled, those extra documents inflate any count of insider activity. InsiderAlpha groups each company-insider-date combination into a filing group, marks one filing as primary, and treats the rest as amendments or duplicates. Every count and signal on the platform is built from the deduplicated primary set. Form 4 by the numbers As of August 3, 2026, InsiderAlpha tracks 221,347 deduplicated Form 4 filings covering 6,114 companies and 53,567 distinct insiders . The live count is higher and moves daily; the figures here are the frozen snapshot our published studies were computed on. Over the trailing 12 months those filings recorded roughly 15,900 open-market purchase transactions worth about $39 billion, against roughly 74,000 sale transactions worth about $171 billion. Sales outnumber purchases by more than four to one. That imbalance is normal, not alarming. Insiders receive most of their equity through compensation, so selling is their default behavior. It is also exactly why a genuine open-market purchase stands out: it is the rarer event, and the one that requires the insider to commit outside cash. What a Form 4 does not tell you A Form 4 reports what happened, not why. It does not disclose the insider's reasoning, their view on valuation, or whether they hold offsetting positions elsewhere. It cannot tell you whether a purchase will work out. Insider buying shifts the odds; it is not a guarantee. Treat Form 4 data as one input into a broader process, not a complete strategy. Frequently asked questions Where can I find Form 4 filings for free? Every Form 4 is public on SEC EDGAR the moment it is accepted, at no cost and with no account. EDGAR is free but raw: filings arrive as XML documents, amendments sit next to originals, and there is no screening or scoring. InsiderAlpha parses, deduplicates, and scores the same public data in real time. Do all insider trades appear on Form 4? All reportable changes in beneficial ownership by Section 16 insiders do, with narrow exemptions that flow to the annual Form 5 instead. Trades by employees below the Section 16 officer level are not reported at all. What happens if an insider files late? Late Section 16 filings must be disclosed in the company's proxy statement, and the SEC does enforce the deadline. In September 2014 it charged 28 officers, directors and large shareholders, plus six companies , in a single sweep aimed at repeat late filers found with ranking algorithms over its own filing data. Some of those filings were late by years; 33 of the 34 settled, paying $2.6 million in penalties between them. In our 2026 purchase data the large majority of filings arrive within a week of the trade. Where does the 10b5-1 checkbox come from? From Release 33-11138, "Insider Trading Arrangements and Related Disclosures" (December 2022), which added the checkbox, imposed cooling-off periods before a new plan may trade, and required companies to file their insider trading policies as an exhibit to the annual report. The checkbox is the single most useful field on the form for separating a decision from a schedule, and it did not exist before 2023. How InsiderAlpha helps InsiderAlpha deduplicates Form 4 amendments, classifies every transaction, flags Rule 10b5-1 plan trades, and scores the high-conviction signals - large open-market officer buys and cluster buying - into a daily plan. Browse the latest Form 4 filings → · Read a Form 4 box by box → · How to read insider buying signals → This article is informational and is not investment advice. ### How to Read Insider Buying Signals (Form 4 Guide) Canonical URL: https://insideralpha.ai/learn/insider-buying-signals Summary: Not all insider buys are equal. Learn which Form 4 purchases matter most: officer vs 10% owner buys, cluster buying, purchase size relative to pay, and how to filter Rule 10b5-1 plan trades from opportunistic conviction buys. How to Read Insider Buying Signals An insider purchase is one of the most-watched data points in fundamental investing - it is the rare case where someone with an information advantage is required to tell you, in public, that they just bet their own money on the stock. But the raw Form 4 feed is noisy: it mixes equity grants, tax-withholding sales, and pre-scheduled plan trades in with the genuine conviction buys. Here is how to separate signal from noise. 1. Look at the role Purchases by the CEO , CFO , or Chairman have historically outperformed buys by less-informed insiders - the CFO in particular tends to know the numbers first. 10% owners such as activist funds also carry weight, because they make large, research-driven directional bets. InsiderAlpha weights officer buys (1.5×), 10% owner buys (1.6×), and director buys (1.2×) accordingly. 2. Size relative to compensation A $50,000 purchase from an executive earning $20M a year is a rounding error. The same $50,000 from a small-cap director earning $200K is a real statement of conviction. Always read the dollar value of a buy against the insider's pay and existing stake, not in isolation. 3. Cluster buying When two or more insiders buy in the same short window, the signal is far stronger than any single purchase. Cluster buys frequently precede positive earnings surprises and strategic announcements because they suggest the insiders are reacting to the same shared, non-public read on the business. 4. Filter out Rule 10b5-1 plan trades Pre-scheduled Rule 10b5-1 trades are calendar-based, not opportunistic - the insider set them up months in advance. InsiderAlpha detects 10b5-1 markers in Form 4 footnotes and flags them so they don't pollute your buy signal. 5. Recency and liquidity The edge decays fast. A 24-hour-old buy in a liquid mid-cap is actionable; a 30-day-old buy in a thinly-traded micro-cap is not. We apply a recency bonus that decays over 48 hours and require real liquidity (50-day average volume ≥ 100,000 shares) before a name reaches the plan. The base rate: buying is rare, and that is the point Across the Form 4 filings InsiderAlpha tracks, insider sales dwarf insider buys. In the 12 months through late July 2026, insiders reported roughly 74,000 open-market sale transactions worth about $171 billion, against roughly 15,900 open-market purchases worth about $39 billion. That is more than four sales for every buy. This imbalance is structural. Most insider equity arrives as compensation, through grants and option exercises, so selling is the default behavior for an executive managing personal finances. An open-market purchase reverses that default: the insider is choosing to increase exposure with outside cash. The scarcity of real buying is what gives the signal its power, and it is why a screen built on purchases alone starts from a much cleaner sample than one that tries to interpret the flood of sales. How much time do you have to act? Less than most people assume. In InsiderAlpha's 2026 data, the median open-market purchase is filed 2.8 calendar days after the trade, and 90% are filed within 7 days. The disclosure itself is therefore already a few days behind the insider's decision. Academic work and our own evaluation data both point the same way: the abnormal return after disclosure decays quickly, with the strongest edge in the first hours and days after the Form 4 hits EDGAR. Watching filings in real time, rather than reading a weekly digest, is not a nice-to-have. It is most of the trade. Putting it together The highest-conviction setup combines all five: a large, open-market purchase (code P), by a top officer or 10% owner, that is meaningful relative to their pay, made alongside other insiders, in a liquid stock, within the last day or two - and not flagged as a 10b5-1 plan trade. That is exactly the combination InsiderAlpha's score is built to surface. What to ignore Equity awards (code A), option exercises paired with same-day sales (M + S), and tax-withholding dispositions (F) are compensation mechanics, not signals. Routine, scheduled selling is also weak - insiders sell for diversification, taxes, and liquidity all the time. A quick pre-trade checklist Is it an open-market purchase (code P), not a grant, exercise, or tax-withholding event? Is the buyer a senior officer, director, or 10% owner rather than a peripheral insider? Is the dollar amount meaningful against the insider's likely pay and existing stake? Is the trade free of a Rule 10b5-1 plan marker? Did other insiders at the same company buy in the same window? Is the filing fresh, ideally under 48 hours old? Is the stock liquid enough to enter and exit without moving the price? A purchase that clears all seven checks is uncommon. In a typical week the raw feed contains hundreds of purchase rows, and only a handful survive this filter. That is the correct outcome: the goal is a short list you can actually research, not a long list that flatters the screen. How InsiderAlpha turns this into a score The platform's confidence score is a direct implementation of the factors above. Role sets the multiplier: officers 1.5x, 10% owners 1.6x, directors 1.2x. Dollar size maps to a base score that rises from 20 points at $10K to 95 points at $10M and above. A recency bonus of up to 15 points decays linearly over the first 48 hours after filing. A cluster bonus adds 15 points when two or more insiders buy the same ticker within 48 hours. Technical checks add smaller amounts when the setup is orderly, for example an RSI between 30 and 70. Hard filters run before any scoring. Purchases under $10,000 are excluded, and so is any name without real market data or without at least 100,000 shares of 50-day average volume. A high insider-conviction score can never override a failed liquidity check, because a signal you cannot exit is not a signal. Common mistakes Treating every Form 4 as a buy signal. Most Form 4 rows are compensation mechanics or sales. The purchase code alone removes the majority of the feed. Chasing stale filings. A two-week-old buy has already been seen, and mostly priced, by everyone watching EDGAR. Ignoring liquidity. Insider buying in a thin microcap can be impossible to trade at anything near the insider's price. This is why InsiderAlpha excludes names that fail its volume and volatility checks entirely. Reading 10b5-1 sales as bearish. Half of insider selling is pre-scheduled. A calendar decided the timing, not the insider's outlook. Anchoring on share count instead of dollars. 100,000 shares of a $0.50 stock is a $50,000 bet, not a large one. Frequently asked questions Do insider buys actually predict returns? On average, yes, modestly, and with wide variation. The academic evidence (Lakonishok & Lee 2001; Cohen, Malloy & Pomorski 2012) finds the effect concentrates in opportunistic, non-routine purchases. See our evidence summary for details. What counts as a large purchase? Context decides, but as a rough scale InsiderAlpha's scoring treats $10K as a minimum worth looking at, and dollar size scores rise steeply through $100K, $1M, and beyond. Below $10,000 we exclude the trade from scoring altogether. How many purchases are pre-scheduled plan trades? Few. In the first quarter of 2026, only 2.6% of the open-market purchases we tracked carried a Rule 10b5-1 marker, versus roughly half of insider sales. Purchase signals survive plan filtering largely intact. See this week's top insider buys → · Are insider buys actually bullish? → This article is informational and is not investment advice. ### Rule 10b5-1 Trading Plans Explained Canonical URL: https://insideralpha.ai/learn/rule-10b5-1 Summary: Rule 10b5-1 lets corporate insiders pre-schedule stock trades, providing a legal defense against insider-trading claims. Learn how the plans work, the 2023 SEC reforms, and why these trades carry less information than opportunistic purchases. Rule 10b5-1 Trading Plans Explained Rule 10b5-1 is an SEC regulation, adopted in 2000, that lets corporate insiders set up a written plan to buy or sell company stock at predetermined times, prices, or quantities - provided they establish the plan while not in possession of material non-public information (MNPI). When a trade later executes under the plan, the insider has an affirmative defense against insider-trading allegations even if they happen to hold MNPI on the day of the trade. How a 10b5-1 plan works An executive who wants to diversify or fund a large purchase can't simply sell whenever they like - they are often in possession of MNPI, or inside a blackout window. A 10b5-1 plan solves this: they hand discretion to a broker in advance via a formula (for example, "sell 10,000 shares on the first trading day of each quarter"). Because the timing is set ahead of time, the individual trades are insulated from any later information advantage. Why the rule exists Before 2000, insider-trading law left executives in an awkward spot. Courts disagreed about whether merely possessing material non-public information while trading was enough for liability, or whether the government had to show the information was actually used . That uncertainty made it legally risky for an executive to sell any stock at all, even for reasons as ordinary as buying a house, because they almost always know something the market does not. Rule 10b5-1 resolved this by adopting an awareness standard for liability and, in exchange, creating the affirmative defense for pre-scheduled plans. The bargain: give up control over trade timing, gain legal safety. How to spot 10b5-1 trades on Form 4 Filers usually disclose the plan in the Form 4 footnotes or remarks, with language such as: "Sale effected pursuant to a Rule 10b5-1 trading plan adopted on [date]." "This transaction was made pursuant to a 10b5-1 plan." Since the 2023 reforms, Form 4 also includes a dedicated checkbox indicating whether a reported transaction was made under a 10b5-1 plan, which makes detection more reliable. InsiderAlpha scans both the checkbox and the footnote text. Why these trades are less informative The entire point of a 10b5-1 plan is that the insider does not control the timing of any individual trade. So a 10b5-1 sale is not evidence that the insider thinks the stock is overvalued today - the calendar simply said "sell." This is why filtering plan trades out of the signal is essential: they are the single biggest source of false "insider selling" alarms. The same logic sharpens what remains. Once plan trades are set aside, an unflagged, discretionary sale deserves closer attention precisely because the insider chose the moment. Filtering does not just remove noise from the sell-side feed; it concentrates the information in the trades that are left. The 2023 SEC reforms Effective February 2023, the SEC tightened the rule significantly: A 90-day cooling-off period for officers and directors (and 30 days for the company itself) before any trade can occur under a newly adopted or modified plan. A requirement that single-trade plans be limited to one per 12-month period. A good-faith certification, and a bar on overlapping plans. Quarterly disclosure of plan adoptions and terminations in company filings. The reforms responded to a body of academic and journalistic work showing that some executives used plans strategically: adopting a plan and trading within days, running multiple overlapping plans and cancelling the unfavorable ones, or terminating a plan just before news. The cooling-off period and the good-faith condition were designed to close those doors. The current rule text is on the eCFR . How common are 10b5-1 trades? What the data shows Planned trading is a sale phenomenon, not a purchase phenomenon. In the first quarter of 2026, across the primary Form 4 filings InsiderAlpha tracks, 49.6% of the 19,584 insider sale transactions carried a Rule 10b5-1 marker, either the dedicated checkbox or plan language in the footnotes. Among the 4,600 open-market purchases in the same window, only 2.6% did. Two practical conclusions follow. First, roughly half of all insider selling tells you nothing about the insider's current view, because a calendar chose the date. Any screen that treats raw insider sales as bearish is majority noise before it starts. Second, purchase signals survive 10b5-1 filtering almost untouched, which is one reason buy-side signals are so much cleaner than sell-side ones. Note that these figures rely on what filers disclose; a plan trade with no checkbox and no footnote language would be missed, so treat the percentages as a floor. How InsiderAlpha uses the flag Every transaction we store carries a 10b5-1 flag derived from the Form 4 checkbox and a footnote scan. In scoring, flagged purchases are discounted rather than treated as conviction buys, and flagged sales are excluded from any bearish interpretation. On filing pages the flag is shown next to the transaction so you can see at a glance whether the timing was the insider's choice. Reading a Form 4 with the plan flag in mind Check the transaction code first. Codes A, M, and F are compensation mechanics regardless of any plan. For a sale (code S), look for the 10b5-1 checkbox and footnotes. A flagged sale is routine portfolio management until proven otherwise. For an unflagged, discretionary sale, look at size relative to the insider's total stake. Trimming 2% of a position is different from liquidating half of it. For a purchase (code P), the flag is rare. An unflagged open-market buy is the strongest starting point for further signal analysis . A note on purchases While most 10b5-1 activity is selling, insiders occasionally buy under plans too. A planned buy is weaker than a spontaneous open-market purchase, so we discount it in scoring rather than treating it as a top conviction signal. Frequently asked questions Is a 10b5-1 sale bearish? By itself, no. The insider committed to the schedule months earlier, often as part of routine diversification. The bearish reading only becomes interesting when discretionary, unplanned selling clusters across several insiders at once. See insider selling: signal or noise . Can an insider cancel a 10b5-1 plan? Yes. Terminating a plan is not itself a trade, so it does not violate the rule directly. But the 2023 amendments require good faith with respect to the plan, and modifications restart the cooling-off period, so strategic cancellation now carries real legal risk. Plan adoptions and terminations must also be disclosed in the company's quarterly filings. Does a 10b5-1 plan mean the insider knows nothing? No. It means the insider certified they held no material non-public information when the plan was adopted . The rule is a defense about timing, not a statement about the insider's overall knowledge of the business. How does InsiderAlpha detect plan trades? We read the dedicated Form 4 checkbox introduced with the 2023 reforms and scan footnotes and remarks for plan language. Both paths set the same flag on the stored transaction. Do companies use 10b5-1 plans too? Yes. Issuers commonly run stock buyback programs under Rule 10b5-1 plans so repurchases can continue through earnings blackout windows . The same interpretation applies: the schedule was fixed in advance, so an individual repurchase carries no timing information. Learn to filter 10b5-1 noise from real signals → · Browse recent Form 4 filings → This article is informational and is not investment advice. ### The Cluster Buying Signal in Insider Trading Canonical URL: https://insideralpha.ai/learn/cluster-buying Summary: Cluster buying - multiple insiders purchasing the same stock within a short window - is one of the most predictive signals in the SEC Form 4 dataset. Learn what defines a cluster, the academic evidence, and how InsiderAlpha scores it. The Cluster Buying Signal A cluster buy is when two or more corporate insiders at the same company purchase shares on the open market within a short window - typically 48 hours to 30 days. Cluster buying is one of the strongest and most consistently documented anomalies in insider-trading research. Why it works A single insider purchase can be motivated by personal liquidity, a new-job share requirement, or simple optimism. But when several independent insiders - say a CEO, a CFO, and an outside director - all buy at roughly the same time, coincidence becomes an unconvincing explanation. The far more likely driver is that they are each responding to the same shared, asymmetric information about the company's near-term prospects: a turnaround taking hold, a contract about to close, or a valuation they collectively see as too cheap. Empirical evidence Cohen, Malloy & Pomorski (2012, "Decoding Inside Information") separated "opportunistic" insiders from "routine" ones and found opportunistic clustered buys generated value-weighted abnormal returns of roughly 8% per year . Lakonishok & Lee (2001) likewise found the predictive power of insider trading concentrates in active, multi-insider buying rather than isolated trades. Practitioner studies since have repeatedly confirmed that clusters outperform lone purchases. An isolated insider buy versus a cluster buy One insider buying alone is a single data point. Three or more different insiders at the same company buying inside a 48-hour window is a cluster - the pattern that carries the stronger signal. One insider buying Three insiders, same company, 48 hours 48-hour window A single insider buying is one data point. Several insiders at the same company buying inside a short window is the pattern that carries the signal. How often do clusters actually happen? Genuine clusters are uncommon, which is part of their value. To measure frequency we count a cluster week : a calendar week in which two or more distinct insiders at the same company report open-market purchases on Form 4. By that definition, InsiderAlpha's data contains 1,389 cluster weeks across 837 companies in the 12 months through late July 2026, out of the 6,114 companies in our August 3, 2026 corpus snapshot. That averages out to a few dozen companies per week showing multi-insider buying. Two caveats. The weekly definition is an approximation: it can split one buying wave across two weeks or merge two nearby waves into one. And our live scoring uses a tighter 48-hour window than this measurement, so the set of clusters that actually earn the scoring bonus is smaller than the weekly count. Directionally, though, the message is clear: on any given week you have dozens of cluster candidates, not thousands, and quality filters decide which of them deserve attention. Clusters form in slow motion A cluster is rarely visible all at once. In our 2026 data the median open-market purchase reaches EDGAR 2.8 calendar days after the trade, and different insiders file at different speeds. So the typical sequence is: one buy appears, then a second filing from a different insider lands a day or two later and retroactively turns the first buy into a cluster. The signal strengthens after the fact. Practically, this means a single strong purchase at a company is worth putting on a watchlist precisely because the next filing may complete the pattern, and platforms that re-score on every new filing will catch that upgrade the moment it happens. Open-market purchases (code P) - not awards or option exercises. Distinct insiders - two trades by the same person don't make a cluster. A tight window - the closer together, the stronger; InsiderAlpha keys on a 48-hour core window. Meaningful size relative to each insider's pay and existing stake. False clusters to avoid Beware coordinated compensation events that look like clusters but aren't: a board-wide annual stock award, or several executives exercising options on the same vesting date. Pre-scheduled Rule 10b5-1 purchases that happen to overlap are also not genuine conviction clusters. We screen all of these out. A worked example (hypothetical) Consider a mid-cap industrial company whose stock has fallen 30% over six months. Two days after an earnings report, the CFO buys $250,000 of stock on the open market, code P, no 10b5-1 flag. Within the same week, two outside directors each add roughly $100,000 at similar prices. Three distinct insiders, discretionary timing, meaningful size against director-level pay, in a stock trading over a million shares a day. That is the archetypal cluster: the people closest to the numbers acted on the same information at the same moment, with their own cash. Now change one detail. Suppose the same three trades were code A grants dated to the annual board meeting, or all three carried a 10b5-1 plan footnote. The surface pattern is identical, three insiders, one week, but the information content collapses to zero. The cluster label belongs to the first case only. This is why filtering on transaction code and plan flags comes before any excitement about the headline. What to check before acting on a cluster Codes: every leg should be an open-market purchase (code P). One real buy plus two grants is not a cluster. Plan flags: discard legs carrying a Rule 10b5-1 marker. Distinct people: confirm the buyers are separate insiders, not one person reporting across direct and indirect accounts. Seniority mix: a cluster that includes the CEO or CFO is stronger than one made of peripheral insiders. Size: each leg should be meaningful against that insider's pay. Three token $5,000 buys can be a coordinated show of confidence rather than real conviction. Liquidity and freshness: the stock must be tradeable and the filings recent. A cluster from three weeks ago is history, not a signal. Does cluster selling work in reverse? Much less well. Selling has many innocent motives: diversification, taxes, expiring options, estate planning. And in the first quarter of 2026 roughly half of the insider sale transactions we tracked carried a 10b5-1 plan marker, meaning a calendar chose the date. Multi-insider selling is therefore both more common and less informative than multi-insider buying. It earns a look when it is discretionary, unusually large, and out of character for the insiders involved, but the asymmetry is real: clusters matter far more on the buy side. See insider selling: signal or noise for the full treatment. Frequently asked questions How many insiders make a cluster? Two is the minimum and already meaningful; three or more distinct buyers is rarer and stronger. What matters is independence: two co-trustees reporting the same household purchase do not count as two buyers. Does the window length matter? Yes. The tighter the window, the more likely the buys share a single cause. InsiderAlpha's scoring keys on 48 hours; research definitions run out to a month. Anything beyond that stops being a cluster and becomes a trend. Do clusters work in every kind of stock? The evidence is strongest where the insiders' information advantage is largest: smaller companies, thinner analyst coverage, and businesses with lumpy, contract-driven revenue. In heavily covered mega-caps, insider buying is rarer and filings are priced within minutes, so the residual edge is smaller. Liquidity still sets the floor either way: a cluster in a stock you cannot exit is a curiosity, not a trade. Are cluster buys a guarantee? No. Insiders are early, wrong, or both often enough that position sizing and risk management still decide the outcome. Clusters shift the odds; they do not remove the risk. How InsiderAlpha scores cluster buys Our trading-plan generator adds a +15-point cluster bonus when two or more insiders purchase the same ticker within 48 hours, layered on top of role-weighted size and recency scoring. You can watch clusters form in real time on the live signal page. See live cluster-buy signals → · Top insider buys this week → This article is informational and is not investment advice. ### Form 4 vs Form 144: What's the Difference? Canonical URL: https://insideralpha.ai/learn/form-4-vs-form-144 Summary: SEC Form 4 reports completed insider transactions; Form 144 is a notice of intent to sell restricted or control stock. Learn how the two forms differ, why a Form 144 is not yet a sale, and how to use them together. Form 4 vs Form 144: What's the Difference? Form 4 and Form 144 are both SEC filings tied to insider activity, and they are easy to confuse. The key distinction is timing and certainty: Form 4 reports a trade that has already happened , while Form 144 is advance notice that an affiliate intends to sell restricted or control securities. A Form 144 is a plan; a Form 4 is a fact. SEC Form 4 - the completed transaction As covered in our Form 4 guide , Form 4 is filed under Section 16(a) within two business days of an insider buying or selling. It is precise: exact share counts, prices, transaction codes, and resulting ownership. It is the authoritative record of what an insider actually did. SEC Form 144 - the notice of intent to sell Form 144 is required under Rule 144 when an affiliate (an officer, director, or large shareholder) plans to sell "restricted" or "control" securities above a threshold - more than 5,000 shares or $50,000 within any three-month period. It is filed at or before the time the sell order is placed, and it states the maximum the insider is authorized to sell. The critical caveat: a Form 144 is not a sale This trips up a lot of investors. A Form 144 says an insider may sell up to a certain amount - it does not mean they did, or that they sold the full amount. Many Form 144 notices are only partially executed, and some are never executed at all. The actual sale, if and when it happens, is what shows up later on Form 4. Key differences at a glance Form 4 Form 144 What it reports A completed buy or sell Intent to sell Timing Filed after the trade (within 2 business days) Filed at or before the sell order Direction Buys and sells Sell-side only Certainty What happened A ceiling on what might happen How to use them together Form 144 gives you an early heads-up that selling pressure may be coming, which can be useful context. But never treat a Form 144 as a realized sale - wait for the confirming Form 4. InsiderAlpha tracks both: recent notices on the Form 144 tracker for forward-looking context, and Form 4 for the ground truth that drives the signal. Because so many 144 notices are pre-scheduled, they often correspond to Rule 10b5-1 plan selling rather than opportunistic exits. Browse the latest SEC filings → · How to read insider buying signals → This article is informational and is not investment advice. ### Are Insider Buys Bullish? What the Research Says Canonical URL: https://insideralpha.ai/learn/are-insider-buys-bullish Summary: Insider buying is one of the few legal information edges available to outside investors - but only certain buys are bullish. Here is what the academic research shows, and when an insider purchase is (and isn't) a signal. Are Insider Buys Bullish? What the Research Says Short answer: certain insider buys are genuinely bullish, and the effect is one of the most durable anomalies in finance - but the average insider trade, taken indiscriminately, is much weaker than headlines suggest. The edge lives in which buys you pay attention to. The case for "yes" Insiders trade their own stock with a structural information advantage, and decades of research show they exploit it on the buy side. Lakonishok & Lee (2001) found insider purchases predict positive future returns, especially in small-cap stocks. Cohen, Malloy & Pomorski (2012) showed that filtering for "opportunistic" insiders - those who trade irregularly, not on a fixed schedule - lifts the predictive abnormal return to roughly 8% a year. Buying is also "cleaner" than selling: there is essentially one reason an insider buys (they expect the stock to rise), versus many reasons they sell. When an insider buy is bullish Open-market purchases (code P) made with the insider's own cash - not grants or option exercises. Senior, well-informed insiders - CEO, CFO, Chairman, or a 10% owner . Size that is meaningful relative to the insider's pay and existing holdings. Clustered buying by several insiders at once. Opportunistic timing - irregular, not a calendar plan. When it is not a signal Equity awards (A) and option exercises (M) - these are compensation, not conviction. Tiny, symbolic buys meant to signal confidence to the market without real capital at risk. Pre-scheduled 10b5-1 purchases - the timing isn't the insider's choice. Illiquid micro-caps where you can't trade the signal at a sane price. Important caveats Insiders are not market timers - they are often early, buying into declines that continue for a while before turning. The effect is a tendency measured across many trades over months, not a guarantee on any single name. And selling is genuinely ambiguous: insiders sell for taxes, diversification, and houses all the time, so "insider selling" is a far weaker signal than insider buying. The bottom line Insider buying is bullish when you filter it properly : open-market, senior, sizeable, clustered, opportunistic, and liquid. That filtering is exactly what InsiderAlpha's scoring automates. See this week's highest-conviction buys → · The full buy-signal guide → This article is informational and is not investment advice. ### What Is a 10% Owner? Beneficial Ownership Explained Canonical URL: https://insideralpha.ai/learn/what-is-a-10-percent-owner Summary: A 10% owner is any person or entity that beneficially owns more than 10% of a company's stock - making them a Section 16 insider who must file Form 4. Learn why their trades matter and how they differ from officer and director buys. What Is a 10% Owner? A 10% owner is any person or entity that beneficially owns more than 10% of a class of a company's registered equity securities . Crossing that threshold makes them a "Section 16 insider" - the same category as directors and officers - which means their trades in the company's stock must be reported on Form 4 within two business days. What "beneficial ownership" means Beneficial ownership is broader than shares held directly in your own name. It captures any security over which a person has voting power or investment power (the ability to direct a sale), including shares held through funds, trusts, LLCs, or family members. It also includes securities a person can acquire within 60 days - for example, through options or convertible notes. This is why a hedge fund's stake is attributed to the fund even though no single individual "owns" the shares. Why 10% owners exist as a category Section 16 of the Securities Exchange Act of 1934 treats large shareholders the same as management because they, too, are presumed to have access to non-public information and the ability to influence the company. Alongside Form 4 reporting, large holders typically file a Schedule 13D (when they intend to influence the company) or Schedule 13G (for passive holdings) once they cross 5% - see Schedule 13D vs 13G for how the two differ. Why their buys matter A 10% owner is usually a sophisticated institution - an activist fund, a private-equity firm, or a strategic investor - making a large, research-driven directional bet. When such an owner adds to an already-large position on the open market, it is a strong vote of confidence: they are concentrating, not diversifying, and they have done deep work on the name. InsiderAlpha applies its highest role multiplier (1.6×) to 10% owner purchases for exactly this reason. How they differ from officer and director buys Information edge: officers know operational detail first; 10% owners bring outside analytical firepower and sometimes board influence. Size: 10% owner trades are usually far larger in dollar terms, which can also move the stock directly. Motivation: an activist 10% owner buying more often signals a campaign or conviction thesis, not routine compensation. A caution Not every 10% owner trade is a clean signal. Index funds and passive managers can cross 10% mechanically, and their filings reflect fund flows rather than a view on the company. Read the filer: an activist adding on the open market is very different from a passive index provider rebalancing. Browse the most active insiders → · Are insider buys bullish? → This article is informational and is not investment advice. ### What Is Section 16? Insider Reporting Rules Explained Canonical URL: https://insideralpha.ai/learn/section-16-explained Summary: Section 16 of the Securities Exchange Act governs how corporate insiders report trades (Forms 3, 4, 5) and disgorge short-swing profits. Learn who counts as a Section 16 insider and what each form means. What Is Section 16? Section 16 of the Securities Exchange Act of 1934 is the framework that makes insider trading visible . It requires a defined set of corporate insiders to publicly report their holdings and every change in them, and it claws back certain short-term trading profits. Almost every filing InsiderAlpha tracks exists because of Section 16. Who is a "Section 16 insider"? Directors of the issuer. Officers with policy-making authority (CEO, CFO, president, principal accounting officer, and similar). 10% beneficial owners of any class of registered equity. The three Section 16 forms Form 3 - initial statement of ownership, filed within 10 days of becoming an insider. It's the "starting balance." Form 4 - the workhorse: filed within two business days of any transaction. See our Form 4 guide . Form 5 - annual catch-up for small or exempt transactions that weren't required to be reported earlier. The short-swing profit rule (Section 16(b)) Section 16(b) requires insiders to disgorge any profit from a purchase and sale (or sale and purchase) of the company's stock within any six-month window - regardless of whether they actually used inside information. The rule is mechanical and strict, which is why you rarely see an insider buy and then quickly sell: the profit would simply be forfeited to the company. Why this matters for investors Because Section 16 forces fast, standardized, public disclosure, outside investors get a near-real-time view of insider conviction. The short-swing rule also means an insider's open-market purchase is a genuine multi-month commitment - they can't flip it without giving back the gains. That's part of why insider buying carries signal . Browse the latest Section 16 filings → · What is Form 4? → This article is informational and is not investment advice. ### Is Insider Selling a Bad Sign? Signal vs. Noise Canonical URL: https://insideralpha.ai/learn/insider-selling-signal-or-noise Summary: Insider selling is far noisier than insider buying - executives sell for taxes, diversification, and liquidity. Learn when a Form 4 sale is meaningful and when it is just calendar-driven noise, with the transaction codes and checkboxes that tell them apart. Is Insider Selling a Bad Sign? Usually, no - at least not on its own. Insider buying has one plausible motive (the insider expects the stock to rise), but insider selling has many innocent ones. Treating every Form 4 sale as a bearish signal is one of the most common mistakes retail investors make. The good news is that a Form 4 gives you almost everything you need to tell the two apart, and it gives it to you in three specific places: the transaction code , the Rule 10b5-1 checkbox , and the shares owned following the transaction column. This guide walks each one, using the boxes as they appear on the SEC's own Form 4 . Start with the base rate: selling is the default Insiders are paid in stock. Restricted stock units vest on a schedule, options expire on a schedule, and neither event asks the executive whether they feel bullish this quarter. Across our own filing record, completed sale transactions outnumber open-market purchases by more than four to one; the underlying counts are in our Form 4 overview . Any framework that reads a sale as bearish is therefore firing constantly, which is another way of saying it is not a signal at all. The four codes that account for most "selling" The single letter in the transaction-code column is the fastest filter you have. Three of these are not decisions about the stock at all: Code What actually happened Information F Shares withheld by the company to pay the tax bill on a vesting award. The insider never chose to sell and never received the cash. None M An option or RSU was exercised or converted. This is an acquisition of common stock, often at a price of $0, that appears next to a disposal of the derivative in Table II. None M then S , same day A cashless exercise: the option is exercised and enough stock is sold immediately to cover the strike and the tax. Mechanically a sale, economically a paycheck. Very little S alone An open-market sale of stock the insider already held. The only row on this list where the insider decided both what and when. Some, conditionally If you strip out F and same-day M-plus-S pairs, the volume of "insider selling" in a typical week collapses. What is left is the population worth looking at, and even that population needs one more filter. The checkbox that does most of the work Since the SEC's December 2022 amendments in Release 33-11138, "Insider Trading Arrangements and Related Disclosures" ( press release ), every Form 4 carries a checkbox stating whether the trade was made under a Rule 10b5-1 plan, and the plan's adoption date is disclosed. In the raw filing XML this is the aff10b5One element: 1 for a plan trade, 0 for a discretionary one. The same release added cooling-off periods that make the checkbox genuinely informative rather than a formality. A director or Section 16 officer adopting a plan cannot trade under it until the later of 90 days after adoption or two business days after the company discloses results for the quarter in which the plan was adopted, capped at 120 days. So a checked box means the decision to sell was taken at least three months before the print you are looking at, by someone who at that time could not have known what this quarter would bring. An unchecked box is not automatically damning either. It means only that the insider chose the timing - which is the precondition for a sale to carry information, not proof that it does. Why insiders sell for reasons unrelated to the stock Taxes - shares are withheld or sold to cover the bill when RSUs vest or options are exercised (codes F and M + S ). Diversification - most of an executive's net worth is tied up in one stock; trimming is prudent personal finance, and boards increasingly encourage it. Liquidity - a house, tuition, a divorce settlement, estate planning. Charitable transfers - a bona-fide gift files under code G , not S , and is a disposal with no sale behind it at all. Rule 10b5-1 plans - pre-scheduled sales where the insider does not pick the timing. When a sale is worth a second look Discretionary and pattern-breaking. The 10b5-1 box is unchecked, and this insider has historically sold only under a plan. The change in method is the signal, not the sale. A large fraction of holdings. This is what the "shares owned following the transaction" column is for. Divide the shares sold by the sum of shares sold and shares remaining. Trimming 5% of a stake is portfolio maintenance; parting with 60% of it is a different sentence. Read the ownership-form column at the same time - an insider can hold most of their exposure indirectly, in which case the direct-holding row understates what they still own. Cluster selling. Several unrelated insiders exiting inside the same window, the mirror image of cluster buying . One officer selling is a personal-finance event; four in a fortnight is a pattern. Selling immediately after the window opens and before the next disclosure, especially by the CFO. See blackout periods for why the calendar matters here. Form 144: the sale you can see before it happens Affiliates selling restricted or control securities in reliance on Rule 144 file a Form 144 notice of proposed sale, which has been required in electronic form on EDGAR since April 2023. It states the number of shares to be sold and the approximate date of sale. Two things follow. First, a Form 144 can appear days before the Form 4 that eventually reports the completed trade. Second, a Form 144 is an intention, not an execution: filers routinely sell less than the notice states, or nothing at all. Treat it as an early warning whose confirmation is the later Form 4, never as a completed sale. Our Form 144 tracker keeps the two apart on purpose. The research consensus Academic work on Section 16 data consistently finds that aggregate insider buying predicts returns considerably better than insider selling. Routine, calendar-driven sales contain little information; only the opportunistic, pattern-breaking sales carry a weak negative signal, and it is weak enough that it is a poor basis for a short. This asymmetry is why InsiderAlpha's scoring is built around high-conviction buys and treats most selling as noise to be filtered rather than as a tradeable signal in its own right. A checklist for reading a sale Read the transaction code . If it is F or G, stop. If it is M paired with a same-day S, stop. Read the 10b5-1 checkbox and the disclosed adoption date. Checked, with an adoption date months earlier, means the timing was not chosen this quarter. Read shares owned following the transaction , and the D or I ownership form beside it. Size the sale against what remains. Read this insider's own history . Their normal is the only baseline that matters. Only then ask what the company disclosed nearby: a completed acquisition, a guidance change, an 8-K . How to use sell data well Use selling as context , not a trigger: filter out 10b5-1 and tax-withholding events first, then ask whether what remains is unusual for that insider. Most of the time, it is not. To watch the live data both ways, see the insider selling feed for completed sales and the Form 144 tracker for sales insiders have announced but not yet executed. Every underlying document is free on EDGAR if you want to check a row against the source. How to read insider buying signals → · Filtering 10b5-1 noise → This article is informational and is not investment advice. ### Open-Market vs. Derivative Transactions on Form 4 Canonical URL: https://insideralpha.ai/learn/open-market-vs-derivative-transactions Summary: Form 4 splits trades into non-derivative (Table I) and derivative (Table II) securities. Learn the difference between an open-market purchase, an option exercise, and an award - and which ones actually signal conviction. Open-Market vs. Derivative Transactions The single biggest source of confusion when reading a Form 4 is mistaking a routine compensation event for a conviction trade. The form's two tables - and the one-letter transaction codes - tell you which is which. Table I - non-derivative securities This is ordinary common stock. The transactions that matter most live here: P (open-market purchase) - the insider spent their own cash to buy shares on the market. This is the gold-standard bullish signal. S (open-market sale) - a sale of common stock; read it with the caveats in our insider-selling guide . A (award/grant) - stock handed over as compensation. No conviction signal - the insider didn't choose to buy. Table II - derivative securities Options, warrants, RSUs, and convertible instruments. The common codes: M (exercise/conversion) - converting options into shares. Often paired the same day with an S (sell to cover the strike price and taxes). An M+S combo is a mechanical compensation event, not a bearish sale. F - shares withheld to pay taxes or the exercise price; pure plumbing. A / D in Table II - derivative grants or dispositions. The mental model Ask one question: did the insider voluntarily spend money to increase their economic exposure? Only an open-market purchase ( P ) clears that bar unambiguously. Awards, exercises, and tax-withholding events are compensation mechanics that happen on a schedule the insider doesn't fully control. How InsiderAlpha handles it Our scoring isolates open-market P purchases, sizes them against the insider's role and pay, and discounts or ignores derivative and award activity - so the signal you see reflects conviction, not payroll. Form 4 transaction codes in full → · See this week's open-market buys → This article is informational and is not investment advice. ### SpaceX IPO: S-1 Filing, SPCX Ticker & What We Know Canonical URL: https://insideralpha.ai/learn/spacex-ipo Summary: SpaceX (Space Exploration Technologies Corp.) has filed a Form S-1 to go public under the ticker SPCX. Here's what the SEC filing shows, what isn't disclosed yet, and how to follow the IPO. SpaceX IPO: What the S-1 Filing Tells Us SpaceX - Space Exploration Technologies Corp., the rocket and satellite company Elon Musk founded in 2002 - has filed to go public. This page explains what the SEC paperwork actually says, what is not yet decided, and how to track the offering as it develops. What has been filed SpaceX's registration has moved through the normal pre-IPO sequence on SEC EDGAR: A confidential draft registration statement (DRS) - the private first step many large companies use. A public Form S-1 - the registration statement that opens the company's financials and risk factors to the public. An S-1/A amendment refining the disclosure. The company intends to trade under the ticker SPCX . You can follow the live filing status, with links straight to the SEC documents, on the SpaceX (SPCX) company page and the InsiderAlpha IPO tracker . What an S-1 is (and isn't) A Form S-1 is a registration statement - it tells the SEC and investors that a company intends to sell shares to the public and discloses the business, financials, and risks. It is not the same as the final pricing. The S-1 begins the process; an offering only becomes tradable once the SEC declares it effective and the company files a priced prospectus (a 424B). What is not yet known Be skeptical of any source quoting a firm SpaceX share price or valuation from the initial S-1. Until a later amendment or the pricing prospectus, these are typically not finalized : The expected price range per share. The number of shares offered. The exchange (NYSE vs. Nasdaq) and the IPO date . InsiderAlpha reads these fields directly from the filings and fills them in as soon as SpaceX discloses them - no estimates, no guesses. Why insider activity will matter after the IPO As a private company, SpaceX has no public insider trades to show - directors and officers only begin filing Form 4 reports once the company is public and subject to Section 16 . After the IPO, every insider purchase and sale will appear automatically on the SPCX page, and the usual signals - role, size, and cluster buying - will become available. How to follow the SpaceX IPO SpaceX (SPCX) page - live S-1 status and links to the SEC filings. IPO tracker - every registered S-1, effective, and priced offering in one place. This article is informational and is not investment advice. All figures are sourced from public SEC filings. ### Form 4 Filing Deadline: The Two-Business-Day Rule Explained Canonical URL: https://insideralpha.ai/learn/form-4-filing-deadline Summary: SEC Form 4 must be filed within two business days of an insider transaction. Learn exactly when the clock starts, what counts as a business day, the rare exceptions, and what happens when insiders file late. Form 4 Filing Deadline: The Two-Business-Day Rule Corporate insiders must report most transactions in their company's stock to the SEC on Form 4 before the end of the second business day after the day the transaction was executed. The rule comes from Section 16(a) of the Securities Exchange Act of 1934, tightened dramatically by the Sarbanes-Oxley Act of 2002 - before 2002, insiders had until the 10th day of the following month, a lag of up to six weeks. When does the clock start? The deadline runs from the trade date (the date of execution), not the settlement date. If a CEO buys shares on a Monday, the Form 4 is due by end of day Wednesday. Weekends and federal holidays do not count as business days: Trade on Monday → due Wednesday Trade on Thursday → due Monday Trade on Friday → due Tuesday For trades executed under a Rule 10b5-1 plan where the insider does not select the execution date (and for certain employee-benefit-plan transactions), the two-day clock starts when the insider is notified of the execution, but no later than the third business day after the trade. What transactions can wait for Form 5? A small set of transactions may be deferred to the annual Form 5 , due within 45 days of the company's fiscal year end - mainly small acquisitions and transactions exempt from Section 16(b). Since a 2023 amendment, bona-fide gifts of securities must be reported on Form 4 within the standard two business days, closing a long-standing loophole. What happens if an insider files late? There is no automatic fine, but late filings must be disclosed in the company's annual proxy statement under "Delinquent Section 16(a) Reports", and the SEC has periodically run enforcement sweeps - in 2023-2024 it charged dozens of insiders and companies with civil penalties for repeated late filings. For traders, a late Form 4 also matters practically: the information edge decays fast, so a purchase reported weeks late carries far less signal than one reported the same day. InsiderAlpha timestamps every filing against its transaction date so you can see exactly how fresh the disclosure is on the daily plan . Key dates at a glance Form 3 - within 10 days of becoming an insider. Form 4 - within 2 business days of the transaction. Form 5 - within 45 days of fiscal year end. Form 144 - filed on or before the sale of restricted stock (see Form 4 vs Form 144 ). Track filings the moment they hit EDGAR on the live Form 4 feed . This article is informational and is not investment advice. ### SEC Form 4 Transaction Codes Explained (P, S, A, M, F, G and More) Canonical URL: https://insideralpha.ai/learn/form-4-transaction-codes Summary: Every Form 4 transaction carries a one-letter code. P and S are open-market trades, A is an award, M an option exercise, F a tax withholding. Full reference of all SEC transaction codes and which ones actually matter as trading signals. SEC Form 4 Transaction Codes Explained Every transaction on a Form 4 is tagged with a one-letter transaction code that tells you what kind of trade it was. Reading the code correctly is the difference between spotting a genuine conviction buy and misreading a routine payroll event as a signal. General transaction codes Code What it means Signal read P Open-market or private purchase. The insider spent personal money to buy shares. The single most informative code in the dataset S Open-market or private sale. The most common code; often routine diversification or 10b5-1 plan selling. Weak and ambiguous on its own V A transaction reported voluntarily earlier than required. Neutral Compensation and benefit-plan codes Code What it means Signal read A Grant or award : RSUs, restricted stock, or options granted by the company. Compensation, not a purchase decision M Exercise of a derivative (usually stock options converting into common shares). Compensation plumbing F Tax withholding : shares delivered back to the company to cover the tax bill on vesting equity. Routine and involuntary - not a bearish signal, despite appearing as a "sale" in many feeds I Discretionary transaction inside an employee benefit plan. Mechanical C Conversion of a derivative security. Mechanical E, H, O, X Expirations and exercises of derivative positions (out-of-the-money expiry, in-the-money exercise, etc.). Mechanical Other codes Code What it means Signal read G Bona-fide gift (to family, trusts, or charity). Since 2023, reportable within two business days. No price signal D Disposition back to the issuer (e.g. in a tender). Mechanical W Acquisition or disposition by will or inheritance. No price signal L Small acquisition under Rule 16a-6. Rare, minor Z Deposit into or withdrawal from a voting trust. Mechanical J Other - a catch-all that must be explained in the filing's footnotes. J can hide anything from a fund distribution to a divorce settlement. Always read the footnote K Equity swaps and similar hedging instruments. Hedging - worth a closer look U Disposition in a change-of-control transaction. M&A mechanics Which codes matter as signals? For signal purposes the hierarchy is simple. Code P purchases are the headline event - an insider voluntarily converting cash into exposure. Clusters of P-buys are stronger still (see cluster buying ). Code S sales are weakly informative on their own (see insider selling: signal or noise ), while A, M and F are compensation plumbing. InsiderAlpha's feed and scoring engine treat only true open-market purchases as buy signals - browse today's on the recent insider buys page. Code definitions follow the SEC's official Form 4 instructions. This article is informational and is not investment advice. ### Form 3 vs Form 4 vs Form 5: SEC Insider Filings Compared Canonical URL: https://insideralpha.ai/learn/form-3-4-5-differences Summary: Form 3 declares an insider's initial holdings, Form 4 reports transactions within two business days, and Form 5 is the annual catch-up. What each form covers, its deadline, and which ones are worth watching. Form 3 vs Form 4 vs Form 5 Section 16 of the Securities Exchange Act requires corporate insiders - directors, officers, and beneficial owners of more than 10% - to disclose their holdings and every change to them. Three forms carry that disclosure, and they answer different questions. Form 3 - "I am now an insider" Filed within 10 days of becoming a director, officer, or 10% owner (or by the effective date of an IPO registration). Form 3 is a snapshot of initial beneficial ownership - no transactions, just the starting position. A wave of Form 3s is often the first public record of a new executive team or an activist crossing the 10% threshold. Form 4 - "I just traded" The workhorse. Any change in beneficial ownership - a purchase, sale, grant, option exercise, or gift - must be reported within two business days (see the filing deadline explained ). Because the lag is so short, Form 4 is the only Section 16 filing fast enough to trade on, and it is the backbone of every insider-signal dataset, including InsiderAlpha's live feed . Form 5 - the annual catch-up Due within 45 days of fiscal year end , Form 5 sweeps up the small set of transactions that were allowed to be deferred (certain exempt or de-minimis acquisitions) and anything that should have been on a Form 4 but wasn't. A Form 5 that discloses previously unreported transactions is a small red flag in itself - it means the two-day rule was missed. Side-by-side Form 3 Form 4 Form 5 Trigger Becoming an insider Any transaction Fiscal year end Deadline 10 days 2 business days 45 days after year end What it reports Starting holdings, no trades Each buy, sell, grant, exercise, or gift Deferred and missed transactions Signal value Context High Housekeeping (late items are a small red flag) Where Form 144 fits Form 144 is not a Section 16 filing at all - it is a notice of intent to sell restricted stock under Rule 144, filed by affiliates before the sale. It often front-runs the matching Form 4 by days, which is why InsiderAlpha ingests both (see Form 4 vs Form 144 ). This article is informational and is not investment advice. ### What Is an 8-K Filing? Material Corporate Events Explained Canonical URL: https://insideralpha.ai/learn/what-is-a-form-8-k Summary: An 8-K is the SEC filing companies must submit within four business days of a material event: CEO departures, M&A, earnings, bankruptcies, data breaches. What each item code means and how traders use 8-Ks as catalysts. What Is an 8-K Filing? A Form 8-K ("current report") is how a U.S. public company tells the market that something material just happened - generally within four business days of the event. Unlike the scheduled 10-K and 10-Q, an 8-K can drop at any moment, which is why it is the filing most likely to move a stock price the day it appears. Common 8-K items and what they mean Item 1.01 - Entry into a material agreement (contracts, partnerships, licensing deals). Item 1.03 - Bankruptcy or receivership. Item 2.01 - Completion of an acquisition or disposition. Item 2.02 - Earnings (results of operations). Most earnings press releases arrive as an 8-K first. Item 3.01 - Delisting notice from the exchange. Item 5.02 - Executive changes : CEO/CFO departures, appointments, and board changes. One of the most price-sensitive items. Item 7.01 / 8.01 - Regulation FD and "other events" - the catch-alls for everything from clinical-trial results to major contract wins. Item 1.05 - Material cybersecurity incidents (required since December 2023). This is the short list. For every item number - including the rare, high-impact ones like restatements (4.02) and changes in control (5.01) - plus real data on how often each appears, see the full 8-K item reference . Why traders watch 8-Ks An 8-K is a catalyst : it changes the information set on a name immediately. The classic pattern is an 8-K landing while insiders are already positioned - an executive-change 8-K after a CEO purchase , or a contract-win 8-K following a cluster buy , retells the insider story with the missing context. InsiderAlpha surfaces every 8-K as it is filed, with a link straight to the original document, and cross-references it against insider buying in the same name over the preceding six weeks - see today's 8-K filings . Reading the filing itself is your job, not ours: we point you at it and tell you who was buying beforehand. 8-K vs Form 4 The two filings answer complementary questions: Form 4 shows what insiders did with their own money; the 8-K shows what the company says is happening. When the two agree - insiders buying ahead of a positive catalyst - the combined signal is much stronger than either alone. This article is informational and is not investment advice. ### Is Insider Trading Illegal? Legal vs Illegal Insider Trading Canonical URL: https://insideralpha.ai/learn/is-insider-trading-illegal Summary: Insiders legally buy and sell their own company's stock every day - it becomes a crime only when trades are based on material non-public information. Where the legal line sits, and why the legal kind is a public dataset anyone can follow. Is Insider Trading Illegal? The phrase "insider trading" covers two very different things. The kind in headlines - trading on confidential information - is a federal crime. But the everyday kind, corporate executives buying and selling their own company's shares, is perfectly legal , tightly regulated, and publicly disclosed. That disclosure is exactly the dataset InsiderAlpha tracks. Legal insider trading Directors, officers, and large shareholders may trade their company's stock provided they: are not in possession of material non-public information (MNPI) at the time of the trade, or trade under a pre-arranged Rule 10b5-1 plan adopted while clean; report the trade on Form 4 within two business days ; respect company blackout windows and the short-swing profit rule , which forces disgorgement of profits from round-trips inside six months. Illegal insider trading Trading becomes illegal under Rule 10b-5 when someone buys or sells on the basis of MNPI in breach of a duty - an executive front-running an earnings miss, a lawyer trading on a deal they're papering, or anyone trading on a tip they know came from such a breach ("tippee" liability). The SEC brings civil cases (disgorgement, penalties, officer bans) and the DOJ prosecutes criminal ones, with sentences that have reached double-digit years. Notably, the information need not come from inside the company - misappropriating confidential information from any source (an employer, a client, even a spouse) can qualify. Why the legal kind is worth following Because legal insider trades are disclosed within two days, they form one of the cleanest public datasets on what informed capital is doing. Decades of academic work show open-market insider purchases predict positive abnormal returns on average (see are insider buys bullish? ) - the insiders aren't breaking the law; they simply understand their business better than the market does. Watch what they're buying right now on the recent buys feed . This article is informational and is not legal or investment advice. ### The Short-Swing Profit Rule (Section 16(b)) Explained Canonical URL: https://insideralpha.ai/learn/short-swing-profit-rule Summary: Section 16(b) forces corporate insiders to surrender any profit from buying and selling their company's stock within six months - no intent required. How matching works, the exemptions, and what it means for reading Form 4 data. The Short-Swing Profit Rule (Section 16(b)) Section 16(b) of the Securities Exchange Act requires corporate insiders to hand back to the company any profit realized from a purchase and sale of company stock within a six-month window . It is a strict-liability rule: no proof of inside information, intent, or even awareness is required. If the trades match, the profit is disgorged. How matching works Courts match the lowest purchase price against the highest sale price within any six-month period to maximize the recoverable profit - even if the insider's actual sequence of trades lost money overall. Any shareholder can sue derivatively to enforce it, and a specialist plaintiffs' bar scans Form 4 filings for matchable pairs, so enforcement is close to automatic. Who is covered, and what's exempt Covered: directors, Section 16 officers, and 10% owners (for 10% owners, both trades must occur while above the threshold). Exempt under Rule 16b-3: most compensation-plan transactions with the issuer - option grants, RSU vesting, tax-withholding dispositions ( codes A, M, F ) - when approved by the board. Not exempt: ordinary open-market purchases (code P) and sales (code S). Why this matters for reading insider signals The rule quietly shapes the data you see on Form 4: Insiders cannot day-trade their own stock. An open-market purchase locks the insider out of profitable selling for six months - so a code-P buy is, structurally, a commitment of at least six months. That is part of why insider buys carry signal . Sales right after buys are rare - and when you do see a quick round-trip on a Form 4, it usually involves exempt compensation transactions, not two open-market legs. 10% owners time their exits around the threshold , selling down in tranches - context worth knowing when reading insider selling by large holders. This article is informational and is not legal or investment advice. ### What It Means When a CEO Buys Their Own Company's Stock Canonical URL: https://insideralpha.ai/learn/ceo-buying-own-stock Summary: A CEO open-market purchase is the most-watched insider signal: the best-informed person at the company converting personal cash into exposure. What the research says, how to separate signal from PR, and where to see CEO buys today. When a CEO Buys Their Own Stock No one has better information about a company's near-term prospects than its chief executive - the pipeline, the quarter, the deal talks, the problems. So when a CEO spends personal cash on an open-market purchase ( transaction code P ) and discloses it on a Form 4 , the market pays attention. Academic studies consistently rank officer purchases - and CEO purchases in particular - among the most predictive classes of insider trade. Why a CEO buy is different from other insider buys Information advantage - directors see board packets; the CEO sees everything, daily. Opportunity cost - most CEO wealth is already concentrated in company equity. Adding more with after-tax cash cuts against every diversification incentive, which is exactly what makes it informative. A six-month lock - the short-swing rule means the CEO cannot profitably sell for six months, so the purchase is structurally a medium-term bet, not a scalp. Separating signal from PR Not every CEO buy is a conviction trade. Discount the purchase when: It's tiny relative to compensation. A $50k buy from a $15M/year CEO is optics; the same buy from a small-cap founder paying themselves $250k is a real position. It lands right after a crash with a press release. "Show of confidence" buys announced in the same breath as bad news are the weakest sub-class. It's a 10b5-1 plan execution - pre-scheduled, not opportunistic. The Form 4 checkbox and footnotes reveal this. Upgrade the signal when the buy is large relative to salary , unscheduled , made near 52-week lows without fanfare , or part of a cluster with the CFO or directors buying the same week - the CFO co-signing the CEO's bet is the strongest two-person pattern in the dataset. Where to see CEO buys right now InsiderAlpha maintains a live page of every executive open-market purchase: CEO & executive purchases , and the daily plan scores each one on role, size, freshness, and clustering. This article is informational and is not investment advice. ### Insider Ownership: What's a Good Percentage? Canonical URL: https://insideralpha.ai/learn/insider-ownership-percentage Summary: How much of a company its insiders own - and whether that stake is growing - changes how you read every Form 4. Typical ranges by company size, why very high and very low ownership both cut both ways, and how to check it. Insider Ownership: What's a Good Percentage? Insider ownership is the share of a company's stock held by its directors, officers, and 10%+ beneficial owners . It is the stock (pun intended) behind the flow you see on Form 4 : a $1M purchase means one thing from an executive who owns nothing, and another from a founder adding to a 20% stake. Typical ranges Mega-caps: usually under 1-3%. Professional management teams hold economically large but proportionally tiny stakes. Mid-caps: mid-single digits is common. Small-caps and recent IPOs: 10-40%+ is normal - founders, families, and early investors still hold major positions. So there is no single "good" number; what matters is the level relative to peers of the same size , and above all the direction : rising ownership through open-market buying is the bullish version; ownership melting away through relentless selling is the other kind. Why high ownership cuts both ways Alignment - managers who own 15% feel drawdowns personally; empirically, moderate-to-high ownership correlates with better capital discipline. Entrenchment - above ~30-40%, control can insulate management from accountability, and dual-class structures can deliver control with little economic exposure. Check voting power separately from economic ownership. Float and liquidity - very high ownership shrinks the tradable float, amplifying volatility in both directions. Low ownership isn't automatically bad - until they sell A 0.5% CEO stake at a trillion-dollar company is still billions of dollars of alignment. The red flag is not the level but the trend: low ownership plus heavy scheduled selling means management's wealth is leaving the shareholder base. Conversely, low ownership plus fresh open-market buying - especially CEO buying or a cluster - is among the strongest setups, because the insiders are choosing exposure they didn't already have. How to check it Every InsiderAlpha company page shows current insider positions from the latest filings, each insider's stake and transaction history, and the run-rate of buying vs selling - sortable by sector . This article is informational and is not investment advice. ### Is That Company Publicly Traded? How to Check in 30 Seconds Canonical URL: https://insideralpha.ai/learn/is-a-company-publicly-traded Summary: UPS, Victoria's Secret, Coinbase, Sunbelt Rentals - which are actually public companies? How to check any company's listing status for free using SEC EDGAR and ticker search, plus quick answers for the names people ask about most. Is That Company Publicly Traded? How to Check in 30 Seconds A company is publicly traded when its shares are listed on a stock exchange and anyone can buy them through a brokerage account. Public companies must register with the SEC, publish audited financial statements, and disclose insider trades on Form 4 . Private companies have none of those obligations, which is exactly why the question "is X public?" matters: it decides whether you can invest at all and how much you can learn about the business. The 30-second check Search the ticker. Type the company's name into InsiderAlpha's company search . If it has a U.S. listing, you'll land on its page with the ticker, filings, and insider activity. Search SEC EDGAR. The SEC's EDGAR company search lists every SEC registrant. A company filing 10-Ks and 10-Qs is public; one with no filings (or only private-placement Form Ds) is not. Watch for subsidiaries. Many famous brands are not companies you can buy directly - they are divisions of a listed parent. You invest in the parent, not the brand. Quick answers: companies people ask about Is UPS a private company? No. United Parcel Service has traded on the NYSE under the ticker UPS since its 1999 IPO - one of the largest IPOs of its era. It was employee- and family-owned for its first 92 years, which is why the question persists. Is Victoria's Secret public? Yes. Victoria's Secret & Co. was spun off from L Brands in August 2021 and trades on the NYSE as VSCO. Is Coinbase publicly traded? Yes. Coinbase went public via a direct listing on Nasdaq in April 2021 (ticker COIN). Is Roku publicly traded? Yes - Roku listed on Nasdaq in 2017 (ticker ROKU). Is Lockheed Martin publicly traded? Yes. Lockheed Martin trades on the NYSE as LMT. Is DocuSign public? Yes. DocuSign listed on Nasdaq in 2018 (ticker DOCU). Is CrowdStrike a public company? Yes. CrowdStrike listed on Nasdaq in 2019 (ticker CRWD). Is Coca-Cola a public company? Yes - and it has been since 1919. The Coca-Cola Company trades on the NYSE as KO. Is Ulta a public company? Yes. Ulta Beauty trades on Nasdaq as ULTA. Is Sprout Social public? Yes. Sprout Social listed on Nasdaq in 2019 (ticker SPT). Is Sunbelt Rentals publicly traded? Not directly. Sunbelt Rentals is the operating brand of Ashtead Group, a listed equipment-rental giant that has been shifting its primary listing from London toward New York. You invest in the parent; check EDGAR for the current listing details. Why "public" changes what you can know Once listed, a company's executives and directors must report every trade in their own stock within two business days. That disclosure stream - the raw material of insider signals - simply does not exist for private companies. If the name you are researching is famous but absent from EDGAR (the SpaceX IPO question is the classic case), be wary of anyone selling you "pre-IPO shares". This article is informational and is not investment advice. ### What Is a Ticker Symbol? Decode IBRX, VLTO, AVGO and More Canonical URL: https://insideralpha.ai/learn/what-is-a-ticker-symbol Summary: Ticker symbols are the short codes stocks trade under - but IBRX, VLTO, or FSCO tell you nothing by themselves. How tickers are assigned, why they change after spin-offs and mergers, and how to look up any unfamiliar symbol in seconds. What Is a Ticker Symbol? A ticker symbol is the short code a security trades under on an exchange - one to five letters in the U.S. (UPS, KO, AVGO, CRWD). The name dates to 19th-century ticker-tape machines, which printed abbreviated company codes to save bandwidth. The codes stuck; the tape didn't. How tickers are assigned The company picks, the exchange approves. Memorable symbols are marketing (LUV for Southwest, HOG for Harley-Davidson); others are just initials. NYSE symbols were traditionally 1-3 letters, Nasdaq 4-5 - the distinction has blurred, so length no longer tells you the exchange. Suffixes mean share classes or security types. BRK.A vs BRK.B are different share classes of the same company; a fifth letter on Nasdaq can flag warrants, rights, or ADRs. Tickers get recycled and renamed. After mergers, rebrands, and spin-offs a familiar symbol can vanish or point at a new business entirely - the single biggest source of confusion. Decoding the tickers people search for IBRX - ImmunityBio , a clinical-stage immunotherapy company. VLTO - Veralto , the water-quality and product-identification business spun off from Danaher in 2023. A textbook example of a spin-off creating an unfamiliar ticker overnight. AVGO - Broadcom . The symbol survives from Avago Technologies, which acquired Broadcom in 2016 and kept the better-known name but its own ticker. OKLO - Oklo , an advanced nuclear-fission company that listed in 2024. RKT - Rocket Companies , the parent of Rocket Mortgage. INFA - Informatica , the data-management software firm that agreed in 2025 to be acquired by Salesforce. SRFM - Surf Air Mobility , a regional air mobility operator. ADPT - Adaptive Biotechnologies , immune-driven medicine. TSSI - TSS , a data-center integration services provider. QSI - Quantum-Si , protein-sequencing instruments. FSCO - FS Credit Opportunities Corp , a closed-end credit fund - ticker-like names of funds trade exactly like stocks. BBDC - Barings BDC , the business development company managed by Barings ("what is the symbol of Barings BDC?" - it's BBDC). RUM - Rumble , the video platform and cloud business. SLB - SLB , formerly Schlumberger, which made its longtime ticker its official corporate name in 2022. How to look up any ticker Type the symbol or the company name into InsiderAlpha's company search . Every result shows what the company does, its sector, recent SEC filings, and - the part most lookup sites skip - what the company's own insiders are doing with their stock. A ticker you've never heard of, plus a wave of executive buying, is a far more interesting object than either fact alone. This article is informational and is not investment advice. ### Who Owns a Public Company? How to Look Up Any Stock's Owners Canonical URL: https://insideralpha.ai/learn/who-owns-a-public-company Summary: Who owns Alaska Air, Zions, or KBR? Public companies are owned by their shareholders - but the interesting question is which ones. Where to find insider stakes, institutional holders, and parent-brand relationships in SEC filings, free. Who Owns a Public Company? Legally, a public company is owned by its shareholders - anyone from an index fund holding 8% to a retail investor holding eight shares. So when people ask "who owns Alaska Air?" or "who owns Zions Bancorporation?", the useful answer is a breakdown: how much belongs to insiders , how much to institutions , and whether any single holder has real control. The three ownership groups Insiders - directors, executives, and 10%+ beneficial owners . Their stakes and every trade they make are public via Forms 3, 4, and 5. Institutions - index funds, mutual funds, pensions, hedge funds. At most large U.S. companies the top holders are Vanguard, BlackRock, and State Street through index funds, typically 5-10% each - ownership without operational control. Retail and everyone else - the remaining float. Where to look it up (all free) The proxy statement (DEF 14A) has a "beneficial ownership" table listing every director, officer, and 5%+ holder. Schedules 13D and 13G are filed when anyone crosses 5% - 13D signals activist intent, 13G passive holding. Form 13F shows each institution's quarterly holdings. Form 4 shows insider stakes changing in near-real time - InsiderAlpha tracks these on every company page , including each insider's current position and ownership percentage . Quick answers to common "who owns" questions Alaska Air - Alaska Air Group is a public company (NYSE: ALK); it in turn owns Alaska Airlines and, since 2024, Hawaiian Airlines. No controlling shareholder - its largest holders are institutions. Zions Bancorporation - public ( Nasdaq: ZION ), institutionally held; despite the name, no single "Zion" owns it. FNF - Fidelity National Financial is public (NYSE: FNF) and is not part of Fidelity Investments, a common mix-up. FNF itself majority-owns F&G Annuities & Life. KBR - KBR has been an independent public company since Halliburton spun it off in 2007. AAON - AAON is public (Nasdaq), founder-influenced but institutionally owned. BJ's Wholesale - BJ's Wholesale Club Holdings has been public since its 2018 IPO, when its private-equity owners sold down; today it is institutionally held. "Who owns X" vs "what does X own" The reverse question matters just as often - a listed parent can own many famous brands: Altria owns Philip Morris USA (Marlboro in the U.S.), U.S. Smokeless Tobacco (Copenhagen, Skoal), John Middleton, NJOY, and stakes including a large minority of Anheuser-Busch InBev and about 41% of Cronos Group. Royal Caribbean Group owns Royal Caribbean International, Celebrity Cruises, and Silversea, plus half of TUI Cruises and Hapag-Lloyd Cruises. When a brand you searched for turns out to be a subsidiary, the insider filings and the stock you can buy belong to the parent. The ownership signal most people miss Static ownership tables tell you who holds the stock today. Insider trades tell you which owners are adding or cutting - and when the people who run the company are buying with their own cash, that is historically the more informative fact. Both live on every InsiderAlpha company page. This article is informational and is not investment advice. ### What Does That Company Do? Research Any Stock in 10 Minutes Canonical URL: https://insideralpha.ai/learn/how-to-research-a-public-company Summary: What does Entegris make? What is FMC Corp, or Oklo, or Veralto? How to answer 'what does this company actually do' for any stock using the 10-K, plus where official employee counts live and what insider filings add. What Does That Company Actually Do? Every public company answers this question, in its own words and under legal liability, in one place: Item 1 ("Business") of its annual 10-K . That section - not a stock forum, not a market-cap screener - is where to start when a ticker you don't recognize shows up in an insider filing or a screen. Here is the 10-minute routine. The 10-minute routine Minute 1-2: the company page. Search the name or ticker on InsiderAlpha for the sector, size, price history, and insider activity at a glance. Minutes 3-7: 10-K Item 1. Read how the company describes its segments, customers, and competition. If a business cannot be understood from its own Item 1, that is information too. Minute 8: headcount and scale. The 10-K's "Human Capital" disclosure carries the official employee count - the number behind every "how many employees does X have" search. UPS, for example, reports roughly 490,000 employees worldwide; Dutch Bros roughly 24,000, mostly in its shops. Always quote the 10-K, not a stale infobox. Minutes 9-10: what insiders are doing. Filings show whether the people who know the business best are buying or selling . Worked examples from real searches What does Entegris do? Entegris makes the advanced materials, filters, and handling systems that keep semiconductor fabs contamination-free - a picks-and-shovels chip play most people have never heard of. What is FMC Corp? FMC is an agricultural sciences company: insecticides, herbicides, fungicides, and crop-protection technology. What is Oklo? Oklo designs compact fast-fission power plants and aims to sell power, not reactors; it listed in 2024 and is a favorite of the AI-datacenter power trade. What is Veralto? Veralto (VLTO) is Danaher's 2023 spin-off: water-quality testing and product-identification businesses. What is Rocket Companies? Rocket is the parent of Rocket Mortgage, America's largest retail mortgage originator, plus title and personal-finance arms. What is Global Payments? Global Payments processes card transactions for merchants and issuers worldwide. What is Hain Celestial? Hain Celestial sells organic and natural foods (Celestial Seasonings teas, Terra chips). What is Pool Corporation? Pool Corp is the world's largest wholesale distributor of swimming-pool supplies - a niche-dominance compounder. What is Prospect Capital? Prospect Capital is a business development company (BDC) that lends to mid-market firms and pays out most income as dividends. What is Coupang? Coupang is South Korea's dominant e-commerce and logistics platform, NYSE-listed since 2021. What is RB Global? RB Global runs Ritchie Bros, the heavy-equipment auction marketplace, plus IAA salvage auctions. What is Deckers Outdoor? Deckers owns UGG and HOKA - two of the most profitable footwear brands of the past decade. Why insider filings belong in basic research The 10-K tells you what the business is; Form 4 filings tell you what the people running it are doing about it. An unfamiliar industrial with steady cluster buying by its officers is how professional investors find ideas before the crowd does. That combination - business description plus live insider flow - is what every InsiderAlpha company page is built around. This article is informational and is not investment advice. ### How to Read a Form 4, Box by Box (With a Real Example) Canonical URL: https://insideralpha.ai/learn/how-to-read-a-form-4 Summary: A Form 4 packs an insider trade into a header, two tables, and footnotes. What every box means - relationship checkboxes, transaction codes, the (A)/(D) flag, direct vs indirect ownership - walked through on a real 2026 CEO purchase, with the EDGAR document open beside it. How to Read a Form 4, Box by Box Every insider trade at a U.S. public company becomes a Form 4 within two business days, and every Form 4 has the same anatomy: a header that says who traded and what their relationship to the company is, Table I for common-stock transactions, Table II for options and other derivatives, and footnotes where the interesting caveats hide. Once you can read those four parts, no filing takes more than a minute to parse. This guide follows the boxes as they are laid out on the SEC's blank Form 4 , and then reads a real filing from EDGAR line by line. If you have a filing open in another tab, the section headings below map to what is in front of you. The four parts of an SEC Form 4 A Form 4 has four parts stacked top to bottom: the header identifying the issuer, the reporting person and their relationship checkboxes plus the 10b5-1 checkbox; Table I for non-derivative securities; Table II for derivative securities; and the footnotes and signature block. Header Issuer and ticker · reporting person · relationship checkboxes (Director / Officer / 10% Owner) · 10b5-1 plan checkbox Table I - Non-Derivative Securities Date · transaction code · amount with (A) or (D) · price · shares owned after · ownership form Direct or Indirect Table II - Derivative Securities The same columns, plus exercise price, exercise and expiry dates, and the number of underlying shares Footnotes and signature Weighted-average prices, indirect holdings, plan adoption dates - the caveats that change how a row reads Every Form 4 has the same four parts, in this order. The header: who, where, and in what capacity The top of the form identifies the reporting person, the issuer and its ticker, and the date of the earliest transaction being reported. The most important header element is the relationship checkbox group : Director , Officer (give title below) , 10% Owner , and Other . This is where the signal quality starts - a CFO's open-market buy means something different from a passive fund crossing a threshold, and the checkboxes are how you tell them apart. The checkboxes are not exclusive, and this trips people up constantly. A CEO who also sits on the board has both Director and Officer checked. Read all four boxes, not the first one that is ticked. Since the amendments adopted in Release 33-11138, "Insider Trading Arrangements and Related Disclosures" , the form also carries a dedicated checkbox indicating the trade was made under a pre-scheduled Rule 10b5-1 plan , with the plan's adoption date noted in the "Explanation of Responses." Checked means the timing was decided months earlier and carries little information; unchecked means the insider chose this week to act. Table I: non-derivative securities Table I ("Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned") is where ordinary share transactions live. Reading left to right: Title of security - usually common stock. Transaction date - when the trade executed, not when it was filed. Transaction code - the single letter that determines whether the row matters: P (open-market purchase), S (sale), A (award), M (option exercise), F (tax withholding), G (gift). See the full code guide . Amount, with an (A) or (D) flag - shares acquired or disposed of. Price - often a weighted average across multiple executions, detailed in a footnote. Shares owned after the transaction - the insider's resulting position, which lets you judge how meaningful the trade is relative to what they hold. Ownership form: D or I - direct (their own account) or indirect , with the nature of indirect ownership spelled out ("By Spouse," "By Family Trust," "By LLC"). Table II: derivative securities Table II covers options, warrants, RSUs, and convertibles - instruments whose value derives from the underlying stock. It adds columns for the exercise price, exercise/expiration dates, and the number of underlying shares. An option exercise typically produces rows in both tables: code M in Table II as the option is used up, and a matching acquisition of common stock in Table I. That is compensation mechanics, not conviction - the distinction our guide to open-market vs derivative transactions covers in depth. The footnotes: where the caveats live Footnotes carry the qualifications that change how a row should be read: weighted-average price ranges, shares held through entities, 10b5-1 plan adoption dates, and post-transaction reclassifications. Skimming a Form 4 without the footnotes is how a routine tax-withholding disposal gets misread as a bearish sale. A real example, read cold Here is a filing you can open beside this page. On July 21, 2026, Conagra Brands (CAG) filed a Form 4 for John P. Brase: accession 0001807641-26-000007, which EDGAR serves as a filing index , a rendered document and the raw XML underneath it. The header shows both the Director and the Officer box checked, with the title "President and CEO," and the 10b5-1 checkbox unchecked. Table I shows code P dated July 17: 35,000 shares acquired (A) at a weighted average of $14.5895, which is roughly $511,000 at market. Shares owned after: 35,000, held directly (D). Table II is empty. Field On the filing Issuer / ticker Conagra Brands / CAG Reporting person John P. Brase, President and CEO (Director and Officer boxes checked) Transaction code P - open-market purchase Transaction date 2026-07-17 (filed 2026-07-21) Shares / price 35,000 (A) at $14.5895 weighted average Approximate value $511,000 Owned after / form 35,000, Direct (D) 10b5-1 checkbox Unchecked - discretionary timing Reading it: the person at the top of the company put half a million dollars of his own cash into the stock at market prices, discretionarily, and the position equals his entire direct common-stock holding, so this is a first open-market purchase rather than an addition. That is the highest-information pattern a Form 4 can show, which is why role, size, and discretionary timing are exactly the inputs insider-buying analysis weights. Three details on that filing you would miss at a glance The deadline was met on the last possible day. July 17, 2026 was a Friday. Business day one was Monday the 20th, business day two was Tuesday the 21st, and the signature is dated the 21st. The two-business-day clock set by Release 34-46421, "Ownership Reports and Trading by Officers, Directors and Principal Security Holders" is counted from the transaction date, not from the day the paperwork reached the lawyers, and filings routinely land against the buzzer like this one. The footnote contradicts the transaction. Footnote 1 reads "Price reflects the weighted average sale price for multiple transactions with prices ranging from $14.575 to $14.59 per share" on a row coded P, an acquisition. That is a filing agent's boilerplate template, not a disguised sale, and the substance is elsewhere in the same sentence: the $14.5895 headline price is an average across executions in a narrow band, and the reporting person undertakes to provide the full breakdown on request. Read footnotes for the numbers they add, and expect the prose around them to be recycled. The insider did not sign it. The signature block reads "/s/ McLaurin Hill Files, Attorney-in-Fact." Almost all Form 4s are filed by the company's legal team under a standing power of attorney. This is normal and says nothing about the trade, but it does explain why filings for several officers at one company appear within seconds of each other: one person submitted them all. The raw XML, for anyone parsing it Every Form 4 on EDGAR has a machine-readable XML document behind the rendered page, and the element names map cleanly onto the boxes above. The ones that carry the meaning: Element Box it corresponds to periodOfReport Date of earliest transaction reported isDirector , isOfficer , isTenPercentOwner , isOther The four relationship checkboxes, each independently true or false aff10b5One The Rule 10b5-1 checkbox: 1 for a plan trade, 0 for discretionary transactionCode Table I / II transaction code column transactionAcquiredDisposedCode The (A) or (D) flag beside the share count sharesOwnedFollowingTransaction Shares owned after the reported transaction directOrIndirectOwnership and natureOfOwnership The D or I column, and the explanation of indirect holdings Two parsing traps. transactionPricePerShare can be zero and still be correct: an award or an option conversion has no cash price. And a single filing can carry several nonDerivativeTransaction blocks for the same day, so the last sharesOwnedFollowingTransaction in document order is the running total, not the sum of the rows above it. Never compute a transaction's value by multiplying your own share and price columns when the filing states an amount. Five mistakes that survive a quick read Reading the filing date as the trade date. They can be four calendar days apart, which matters when the stock moved in between. Counting a code M row as a purchase. An option exercise acquires shares without an open-market decision behind it. Counting a code F row as a sale. Shares withheld for tax are not an exit. Ignoring the D or I column. An insider with a small direct holding may own far more through a trust or an LLC, and the "shares owned after" figure on a direct row says nothing about it. Treating multiple filings as multiple trades. One economic transaction can generate several filings, which is what the next section is about. Amendments and duplicates A corrected filing appears as Form 4/A next to the original, and one economic trade can generate several filings when multiple reporting persons (a fund, its adviser, its managing partner) each have a reporting obligation. In our data, well over half of raw Form 4 filings are duplicates or restatements of another filing. EDGAR shows you all of them; InsiderAlpha deduplicates them into one primary filing per trade before anything is scored. Browse live Form 4 filings → · Every transaction code explained → This article is informational and is not investment advice. ### 8-K Item Numbers Explained: What Each Code Means and How Often It Appears Canonical URL: https://insideralpha.ai/learn/8-k-item-codes Summary: Every 8-K event slots into a numbered item - 2.02 is earnings, 5.02 is executive changes, 4.02 is a restatement. The full item reference, which items are furnished vs filed, and how often each one actually appears across 29,000+ real filings. 8-K Item Numbers Explained When a public company files an Form 8-K , the event being disclosed is slotted into a numbered item - and the item number is the fastest way to triage a filing before reading a word of it. An Item 2.02 is an earnings release; an Item 4.02 says the company's past financial statements can no longer be relied on. Same form, very different mornings. Most 8-Ks must be filed within four business days of the triggering event. The definitive list is the General Instructions to Form 8-K itself, and the numbering everyone uses today dates from Release 33-8400, "Additional Form 8-K Disclosure Requirements and Acceleration of Filing Date" (2004), which both added items and cut the deadline from five business days (or fifteen calendar days, depending on the item) to four. Item numbers below are quoted with the official headings from the current form. How often each item actually appears Across the 29,000+ 8-K filings InsiderAlpha ingested between mid-February and early August 2026, the mix looks like this. Filings often report several items at once, so the percentages overlap: Share of 8-K filings carrying each item number Item 9.01 appears on 73% of filings, 2.02 on 26%, 7.01 on 25%, 8.01 on 23%, 5.02 on 17%, 1.01 on 14% and 5.07 on 12%; every other item is below 7%. Exact values are listed in the table below this chart. 9.01 Exhibits 73% 2.02 Earnings 26% 7.01 Regulation FD 25% 8.01 Other events 23% 5.02 Exec changes 17% 1.01 Material agreements 14% 5.07 Vote results 12% 3.02 Unregistered sales 6% 2.03 New debt 5% 5.03 Charter/bylaws 4% 3.01 Delisting notice 2% 2.01 Acquisitions 2% Share of 8-K filings carrying each item, across 29,012 filings ingested since February 2026. Filings usually report several items, so the bars sum past 100%. Item What it announces Share of filings 9.01 Exhibits (rides along on most filings) 73% 2.02 Earnings 26% 7.01 Regulation FD disclosure 25% 8.01 Other events 23% 5.02 Executive and board changes 17% 1.01 Material agreements 14% 5.07 Shareholder-vote results 12% 3.02 Unregistered share sales 6% 2.03 New debt or financial obligations 5% 5.03 Charter and bylaw amendments 4% 3.01 Delisting notices 2% 2.01 Completed acquisitions 2% Everything else - restatements, bankruptcies, changes in control - lives below 2%, which is exactly why those rarer items are worth an alert when they do appear. Section 1 - business and operations 1.01 Entry into a Material Definitive Agreement - contracts, partnerships, licensing and merger agreements outside the ordinary course of business. 1.02 Termination of a Material Definitive Agreement . Note the carve-out: expiry on a stated end date is not reportable, so a 1.02 usually means the agreement ended early. 1.03 Bankruptcy or Receivership . 1.04 Mine Safety - reporting of shutdowns and patterns of violations, a narrow item that only mining registrants use. 1.05 Material Cybersecurity Incidents , added by Release 33-11216 ( July 2023 ) and required from December 2023. The four-business-day clock starts when the company determines the incident is material, not when the breach happened, and the form is explicit that the determination must be made without unreasonable delay. Disclosure can be delayed only if the U.S. Attorney General notifies the Commission that immediate disclosure would pose a substantial risk to national security or public safety. Section 2 - financial information 2.01 Completion of Acquisition or Disposition of Assets - the closing, not the announcement. The announcement was a 1.01. 2.02 Results of Operations and Financial Condition - the quarterly earnings press release almost always arrives here first. 2.03 Creation of a Direct Financial Obligation or an obligation under an off-balance-sheet arrangement: new debt, credit facilities, guarantees. 2.04 Triggering Events That Accelerate or Increase such an obligation - a covenant breach or an early-amortization event. Rare, and rarely good. 2.05 Costs Associated with Exit or Disposal Activities (layoffs, restructurings) and 2.06 Material Impairments . Both clocks start when the company makes the estimate, not when the decision was taken. Section 3 - securities and trading markets 3.01 Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing . 3.02 Unregistered Sales of Equity Securities - private placements and PIPEs, which is dilution arriving off-exchange. 3.03 Material Modification to Rights of Security Holders . Section 4 - accountants and financial statements 4.01 Changes in Registrant's Certifying Accountant - an auditor change. The item requires the company to say whether there were disagreements, and a letter from the departing auditor is filed as an exhibit. 4.02 Non-Reliance on Previously Issued Financial Statements or a Related Audit Report or Completed Interim Review - a restatement. One of the most reliably negative items in the entire form. Section 5 - corporate governance 5.01 Changes in Control of Registrant . 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers . The single busiest governance item, and the lettered sub-parts matter: (a) is a director resigning over a disagreement, (b) is a departure, (d) is an election, (e) is a compensation arrangement. A CEO or CFO exit with no successor named reads very differently from a planned retirement filed under the same number. 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year . 5.04 Temporary Suspension of Trading Under Registrant's Employee Benefit Plans - the statutory pension-fund blackout, during which directors and officers may not trade company equity acquired through their service. See blackout periods . 5.05 Amendments to the Code of Ethics , or a waiver of a provision of it. A waiver granted to a named executive officer is worth reading. 5.06 Change in Shell Company Status - the item that accompanies a reverse merger. 5.07 Submission of Matters to a Vote of Security Holders - annual meeting results, including say-on-pay tallies. 5.08 Shareholder Director Nominations . Sections 6, 7, 8, and 9 Section 6 (6.01 through 6.06) applies only to asset-backed securities issuers. If you are reading equity filings you will never see it. 7.01 Regulation FD Disclosure - information the company wants public without the legal weight of a "filed" document. The item exists because of Release 33-7881, "Selective Disclosure and Insider Trading" , which made broad public disclosure the price of talking to anyone selectively. 8.01 Other Events - the wildcard item where clinical-trial results, contract wins, litigation updates and everything uncategorizable lands. A company may use it for anything it considers of importance to security holders, which is why its contents range from transformative to trivial. 9.01 Financial Statements and Exhibits - the attachments themselves, which is why it appears on nearly three of every four filings. "Furnished" vs "filed": why 2.02 and 7.01 are different Items 2.02 and 7.01 are furnished rather than filed . Furnished material is not subject to Section 18 liability and is not automatically incorporated into the company's registration statements, which gives companies more legal room. Item 2.02's treatment comes from Release 33-8176, "Conditions for Use of Non-GAAP Financial Measures" , the same rulemaking that produced Regulation G, which is why an earnings release carrying non-GAAP figures is furnished under 2.02 while the reconciliation requirements still bite. The practical consequence for readers: soft, promotional or preliminary news tends to be parked under 7.01, while items carrying full filing liability (1.01, 4.02, 5.02) are drafted much more carefully. Weight them accordingly. One more wrinkle worth knowing: if a company files the same press release under both 2.02 and 7.01, the 7.01 half is usually the forward-looking commentary it does not want incorporated by reference. Reading the item line before you read the filing On EDGAR, the filing index page for every 8-K lists its items above the documents. That line is the whole triage step. A filing tagged 2.02, 9.01 is a routine earnings release with the release attached as an exhibit. 5.02, 9.01 with no press release attached is usually a departure the company is not promoting. 4.02 on its own needs reading today. And 1.01, 2.03, 3.02, 9.01 together is a financing: an agreement was signed, debt was created, and shares were issued off-exchange, all in one event. You can pull any of these from EDGAR full-text search without an account. Reading items alongside insider activity An item number tells you what happened; a Form 4 tells you what insiders did with their own money before and after it. An unexpected 5.02 following officer purchases, or a 1.01 landing weeks after a cluster buy , is the combined pattern worth real attention. InsiderAlpha lists every 8-K as it is filed and cross-references it against insider buying in the same name over the preceding six weeks - see today's 8-K filings . Item numbers are reported as the filing itself states them; we do not read the document or interpret what the item means for the stock. This article is informational and is not investment advice. ### Schedule 13D vs 13G: How 5% Shareholders Disclose Their Stakes Canonical URL: https://insideralpha.ai/learn/schedule-13d-vs-13g Summary: Cross 5% of a public company and you must file a Schedule 13D (active intent) or 13G (passive stake). What each form signals, the post-2024 filing deadlines, when a 13G must convert to a 13D, and how both relate to Form 4. Schedule 13D vs 13G: How 5% Shareholders Disclose Their Stakes Any investor whose beneficial ownership of a U.S. public company's registered equity crosses 5% must tell the market - and the form they choose is itself the signal. A Schedule 13D says "I may seek to influence this company"; a Schedule 13G says "I'm just holding." The distinction between activist and passive intent is the entire reason two forms exist. Where the 5% threshold comes from The obligation is Section 13(d) of the Securities Exchange Act of 1934 and the rules under it (Regulation 13D-G). It bites on beneficial ownership , not on shares held outright: a person beneficially owns a security if they have or share the power to vote it or the power to dispose of it, and options or other rights exercisable within 60 days count toward the total. Two consequences catch people out. A holder can cross 5% without buying anything, because the company retired stock and shrank the denominator. And members of a group acting together are aggregated and treated as one beneficial owner, which is how a coordinated stake becomes reportable even though no single member crossed the line. The SEC's staff maintains a long set of interpretations on Sections 13(d) and 13(g) for the edge cases, and it is the first place to look when a situation does not fit the summary above. Schedule 13D: the activist filing A 13D is required when the holder has, or may develop, intent to influence control - board seats, strategy, a sale of the company. Since the deadline reforms adopted in Release 33-11253, "Modernization of Beneficial Ownership Reporting" ( announced October 2023 , compliance from February 2024) it must be filed within five business days of crossing 5%, down from the ten calendar days that had stood since 1968, and amended within two business days of a material change rather than merely "promptly." The form has seven numbered items, and they are not equally interesting: Item 1 and 2 - the security and the issuer; the identity, citizenship and criminal or regulatory history of every reporting person. Item 3 - source and amount of funds. Borrowed money and margin arrangements have to be described here. Item 4, "Purpose of Transaction" - the one everybody reads. This is where a campaign is announced, and where a filer states whether they may seek board representation, a sale, a recapitalization or a change in the board. Item 5 - the exact ownership figures, including sole and shared voting and dispositive power, and every transaction in the last 60 days. Item 6 - contracts and understandings with anyone else, which is where swaps, voting agreements and standstills surface. Item 7 - exhibits, including the joint filing agreement that reveals the members of a group. A 13D from a known activist fund routinely moves the stock the day it appears, and the amendment history that follows is the campaign's public timeline. Schedule 13G: the passive filing A 13G is the lighter form for three categories of holder: qualified institutional investors (banks, brokers, registered investment companies and advisers holding in the ordinary course of business), passive investors holding below 20% with no control intent, and exempt investors (holders who crossed 5% without making a purchase that triggers 13D, for example by holding since before the company registered). It asks for identity, the size of the stake, and a certification about intent. There is no Item 4. The deadlines, by filer type Release 33-11253 replaced a single annual amendment cycle with quarter-driven and month-driven ones. The current pattern: Filer Initial filing Amendments Schedule 13D (any holder with control intent) 5 business days after crossing 5% 2 business days after a material change 13G - qualified institutional investor 45 days after the end of the calendar quarter in which it exceeded 5%; 5 business days after the end of the month in which it exceeded 10% 45 days after the end of a quarter with a material change; then 5 business days after any month-end at which the stake moves by more than 5 percentage points 13G - passive investor 5 business days after crossing 5% 45 days after the end of a quarter with a material change; 2 business days on exceeding 10%, and on each later 5 percentage point move 13G - exempt investor 45 days after the end of the calendar quarter in which it exceeded 5% 45 days after the end of a quarter with a material change For a Schedule 13D, Rule 13d-2(a) deems an acquisition or disposal of 1% or more of the class to be a material change, so the two-business-day amendment clock is concrete rather than a judgement call. The 13G "material change" test is broader and less mechanical. 13D vs 13G at a glance Schedule 13D Schedule 13G Who files Any >5% holder with (possible) control intent Qualified institutions, passive investors under 20%, exempt holders Stated intent May seek to influence the company Holding only Initial deadline 5 business days after crossing 5% 5 business days (passive) or up to 45 days after quarter-end (institutions and exempt holders) Amendments 2 business days after a material change 45 days after a quarter with a material change, with faster triggers past 10% Discloses funding source Yes, Item 3 No Market reaction Often immediate - campaigns start here Usually quiet When a 13G must become a 13D The passive label is conditional. A 13G filer that develops intent to influence control - at any ownership level - or a passive investor whose stake reaches 20% must convert to a Schedule 13D within five business days. That conversion is one of the sharpest signals in the filing world: a holder the market had treated as furniture just declared themselves a participant. Until the 13D is filed and for ten calendar days afterward, the former 13G filer also loses the right to vote or direct the voting of the shares above 5%, which is why conversions are usually timed well ahead of a meeting rather than during a proxy fight. Finding them on EDGAR Both schedules are public the moment they are accepted. On EDGAR the form types are SC 13D and SC 13G , with SC 13D/A and SC 13G/A for amendments; searching by the filer rather than the issuer gives you a fund's whole book of stakes in one list. Since December 2024 both schedules are filed in a structured, machine-readable format, so the ownership percentages and the voting and dispositive power figures can be read without parsing prose. How 13D/G relates to Form 4 Schedules 13D and 13G report stakes ; Form 4 reports trades . They also trigger at different thresholds: 5% for the schedules, versus 10% for Section 16 insider status. Once a holder crosses 10%, every subsequent buy and sell must hit a Form 4 within two business days - much faster and more granular than quarterly 13G amendments. This is why the Form 4 trail is often the best real-time view of a large holder accumulating: the schedules tell you the campaign exists, the Form 4s show you each purchase as it happens. InsiderAlpha scores 10% owner open-market buys with its highest role weight for exactly this reason. The gap between the two regimes is worth stating plainly, because it is where most confusion about "insider" data starts. A fund at 7% files a 13G, then may say nothing for a quarter. The same fund at 11% is a Section 16 insider and must report every trade within two business days. The information you get about the same investor changes character completely at the 10% line, and that discontinuity - not any change in the investor's behavior - explains why some large holders look silent and others look hyperactive. Reading the two forms together New 13D from an activist - a campaign is starting; check Item 4 for what they say they want, Item 6 for who else is involved, and whether company insiders have been buying too. 13G-to-13D conversion - intent changed; the passive stake is now a platform. 13G quietly growing via amendments - accumulation without stated intent; watch for the 10% line, after which the Form 4 record takes over and the reporting cadence jumps from quarterly to near real time. A 13D amendment with no ownership change - the 1% rule was not what triggered it, so read Item 4 and Item 6: something about the campaign changed, not the position. Browse the most active filers → · What is a 10% owner? → This article is informational and is not investment advice. ### Insider Trading Blackout Periods: When Insiders Can and Can't Trade Canonical URL: https://insideralpha.ai/learn/insider-trading-blackout-periods Summary: Most companies bar insiders from trading in the weeks before earnings - but blackout windows are company policy, not SEC law. How trading windows work, the one blackout that is statutory, and why so many insider buys land right after earnings. Insider Trading Blackout Periods: When Insiders Can and Can't Trade A blackout period is a stretch of the calendar during which a company forbids its own directors, officers, and designated employees from trading the stock. If you follow Form 4 filings , blackouts explain one of the most visible rhythms in the data: insider trades bunch up in the days right after earnings and go quiet in the weeks before. The quarterly trading window The standard corporate policy splits each quarter in two. The window closes as the quarter's results take shape - commonly around two weeks before quarter-end, at some companies as early as mid-quarter - and reopens one to two full trading days after the earnings release , once the market has digested the numbers. Inside the open window, insiders still need to be free of material non-public information and usually need pre-clearance from the general counsel before trading. Blackouts are policy, not statute No SEC rule imposes the quarterly blackout. Companies adopt trading windows to keep insiders clear of Rule 10b-5 liability - trading "while in possession of" material non-public information - and pre-earnings weeks are when that possession is presumed. The same instinct produced Regulation FD in 2000: if selective disclosure to analysts is a problem, then an executive who already holds the numbers is a problem too. What the SEC does require, since Release 33-11138, "Insider Trading Arrangements and Related Disclosures" (December 2022), is transparency about the policy itself. Companies must file their insider trading policies as Exhibit 19 to the annual report, so the window rules a company actually applies are a public document rather than folklore. Item 408(a) of Regulation S-K separately requires quarterly disclosure of every director or Section 16 officer who adopted, modified or terminated a trading arrangement, together with its material terms. If you want to know how a specific company runs its windows, read its Exhibit 19 rather than assuming the pattern below. Pre-clearance: the second gate An open window is permission to ask, not permission to trade. Most policies add a pre-clearance step for directors and Section 16 officers: a written request to the general counsel, valid for a short period (commonly a few business days), that can be refused without explanation because the refusal itself would be information. This is why insiders in the same company sometimes trade on the same two or three days and then stop. The clearance was granted in a batch and expired. The one statutory blackout: pension fund blackouts There is a single blackout written into law. Under Regulation BTR , adopted in Release 34-47225, "Insider Trades During Pension Fund Blackout Periods" implementing Section 306(a) of the Sarbanes-Oxley Act, when a company's individual account retirement plans suspend participants' ability to trade company stock for more than three consecutive business days - during a recordkeeper change, for example - directors and executive officers are barred from buying or selling company equity they acquired in connection with their service. The logic: executives should not be able to exit while employees are locked in. Profits from a violation are recoverable by the company, and shareholders can sue derivatively if it does not act. This blackout is the only one you can see coming from the outside, because it has its own 8-K item. Item 5.04, "Temporary Suspension of Trading Under Registrant's Employee Benefit Plans" requires the company to file within four business days of receiving the plan administrator's notice, stating the reason for the blackout and the dates it starts and ends. A 5.04 on the tape is a hard, dated window during which certain Form 4s cannot legitimately appear. See our guide to 8-K item numbers for where 5.04 sits among the rest. How insiders trade through a blackout anyway The blackout-compatible route is a Rule 10b5-1 plan : a schedule adopted while the window is open that then executes mechanically, blackout or not. Release 33-11138 ( announced December 2022 ) tightened the conditions considerably: Cooling-off period. For directors and Section 16 officers, no trade may occur under a new or modified plan until the later of 90 days after adoption or two business days after the company discloses results for the quarter of adoption, capped at 120 days. For anyone else other than the issuer, 30 days. Certification. Directors and officers must certify at adoption that they are not aware of material non-public information and are adopting the plan in good faith. One plan at a time , with limited exceptions, and only one single-trade plan in any twelve-month period. A checkbox on the filing. Every Form 4 now states whether the trade was made under a plan and discloses the plan's adoption date. This is why you will see sales printing through earnings season: the decision was made months earlier, by someone who at the time could not have known this quarter's numbers. InsiderAlpha flags plan trades so scheduled selling never gets read as a discretionary exit, and a scheduled buy never gets credited as fresh conviction. A typical quarterly trading window The trading window is open from the start of the quarter until roughly two weeks before quarter end, closes through quarter end and the earnings release, and reopens about two full trading days after earnings. Exact dates are in the table below. Window open Blackout Open window closes earnings quarter ends quarter starts next quarter A typical quarterly trading window. Roughly half of every quarter is closed to discretionary insider trading. What a typical quarterly policy calendar looks like An illustrative calendar for a company on calendar quarters, with a mid-March window close and late-April earnings: Date Policy state ~Mar 15 Window closes as Q1 results take shape Mar 31 Quarter ends - still closed ~Apr 24 Q1 earnings released ~Apr 28 Window reopens after two full trading days ~Jun 15 Window closes again for Q2 Exact dates vary by company - some close as early as mid-quarter - but the rhythm is the same: roughly half of every quarter is closed to discretionary insider trading. What blackouts mean for reading Form 4s Post-earnings clusters are partly mechanical. The window just reopened for everyone at once, so some bunching is calendar, not coordination. A genuine cluster buy still stands out by its size and breadth. An open-window buy is still a choice. The window permits trading; it doesn't compel it. An officer who steps into the open market days after reporting results is acting on the fullest information the law allows. Quiet quarters are ambiguous. No insider buying for months can simply mean the window barely opened - check the earnings calendar before reading absence as a verdict. A trade dated inside a presumed blackout is a question, not a violation. The window is that company's own policy, and you are guessing at its dates. Before concluding anything, check the transaction code: an award (A), a tax withholding (F) or an expiring option exercise (M) is usually permitted by policy precisely because the insider did not choose the date. Working out a company's window from its own filings You do not have to guess. Three public documents, in this order: Exhibit 19 to the latest annual report gives the policy in the company's own words, including when the window closes and reopens and who needs pre-clearance. The Item 2.02 earnings 8-K fixes the reopening date, because the window reopens a stated number of trading days after the release rather than after any other event. The Form 4 record itself is the check on both. Plot the transaction dates of code P and code S rows for one company across two years and the closed weeks appear as gaps you can measure. Every one of these documents is free on EDGAR . One caution on that third step: the transaction date is what the policy governs, not the filing date. A Form 4 that arrives during a blackout is normal, because the trade behind it happened up to two business days earlier when the window was still open. See what insiders are buying right now → · Rule 10b5-1 plans explained → This article is informational and is not investment advice. ### Form 4 by the Numbers: What 221,347 Insider Filings Reveal Canonical URL: https://insideralpha.ai/learn/form-4-by-the-numbers Summary: We analyzed every SEC Form 4 since December 2022: how fast insiders really file, how much they sell for every dollar they buy, how often executives buy in clusters, and when filings actually hit EDGAR. Form 4 by the Numbers: What 221,347 Insider Filings Reveal InsiderAlpha ingests every SEC Form 4 as it is published. This study covers the deduplicated corpus as it stood on August 3, 2026: 221,347 primary Form 4 filings by 53,567 insiders across 6,114 companies , from December 2022 to that date. The live corpus is larger and grows every trading day; these figures are frozen so every percentage below stays computed on the same rows. Every number below is computed directly from those filings; the methodology, including every data-quality filter we applied, is at the end. How fast do insiders really file? Section 16 gives insiders two business days to report a trade. In practice, the median Form 4 arrives 2 calendar days after the earliest transaction it reports, and 90.5% arrive within 4 calendar days (our data records calendar days, so these figures bracket the business-day rule rather than measuring it exactly). The tail is longer than most investors assume: 3.15% of Form 4s arrive more than 10 days after the trade , about 1 in 30, and 1.55% arrive more than 45 days late. The 99th percentile filing lag is 96 days . Late filings are legal filings - but a three-month old "insider signal" is a very different thing from a two-day-old one, which is why freshness matters when reading insider buying signals . Insiders sold $4.32 for every $1 they bought in 2026 Across 2026 filings to date, insiders reported roughly $21.5 billion of open-market purchases against $93.0 billion of sales - $4.32 sold for every $1 bought, and 4.6 sale transactions for every purchase (50,755 vs 11,022). That asymmetry is structural, not bearish: insiders are paid in stock and sell to diversify, which is exactly why selling is weak evidence while buying - an insider choosing to concentrate personal wealth in their own company - carries signal. Who does the buying: owners and directors, not the C-suite By dollar value of 2026 purchases, 10% owners account for about 41% and directors about 40% , while officers (CEOs, CFOs and the rest of the C-suite) account for only about 13% (roles can overlap, so these do not sum to exactly 100%). The headline-grabbing "CEO buys own stock" story is real but rare; the big money in insider buying is large owners and board members. 96% of insider buying is discretionary Only 4.02% of 2026 purchase transactions were marked as executed under a pre-scheduled Rule 10b5-1 trading plan . Nearly all insider buying is a deliberate, discretionary decision made in the moment - unlike plan-driven selling, which is scheduled months in advance. One in three active companies sees cluster buying Of the 1,890 companies with any insider purchase in 2026, 31% had at least two different insiders buy within a day of each other at least once. Multiple insiders reaching the same conclusion independently is one of the strongest patterns in the literature - the cluster buying signal - and it is far more common than most investors expect. When filings actually hit EDGAR Form 4s are a business-hours phenomenon with an after-close rush: Tuesday is the busiest filing day (23.0% of 2026 filings), Monday the lightest weekday (15.9%), and weekends are nearly silent (1.7% on Saturday, zero on Sunday). Within the day, filings spike in the two hours right after the US market close - timestamps in our feed are consistent with a 4pm-6pm Eastern peak. If you check filings once a day, check after the close; our own pipeline lands the median filing in the database 14 minutes after the SEC feed timestamp. Methodology and data notes Corpus: 221,347 primary Form 4 filings (December 2022 to August 3, 2026), deduplicated so amendments and duplicate submissions are counted once. Source: SEC Form 4 filings on EDGAR. Filing lag is filing date minus the earliest transaction date on the filing, in calendar days; negative lags and lags over 10 years (52 filings) were excluded as data errors. Dollar totals exclude individual transactions above $1 billion to remove a small number of parse-error rows in source filings; this filter removes under 0.3% of transactions. Ratios are therefore conservative estimates. Role percentages can overlap (an insider can be both a director and a 10% owner) and are sensitive to the outlier filter; figures shown use the $1B filter. Hour-of-day timezone is inferred from feed timestamps, not stored explicitly. Journalists and researchers: you are welcome to cite these figures with attribution to InsiderAlpha (insideralpha.ai) and a link to this page. For custom cuts of the data, contact us . Browse the live Form 4 feed → · Recent insider purchases → This article is informational and is not investment advice. ## Data sources - Primary filings: SEC EDGAR (single rate-limited gateway). - Market data: Polygon.io. - VIX: Alpha Vantage. - Insider profile enrichment: deterministic, from SEC filing facts plus guarded Wikipedia matching. 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