Archimedes Tech SPAC Partners III Co. (ARCI) IPO - S-1 Filing, Stock & Insider Activity
Archimedes Tech SPAC Partners III Co. IPO - Status & S-1 Filing
- Ticker: ARCI
- Status: Priced - IPO complete
- S-1 filed: 2025-12-23
- Effective: 2026-01-22
- IPO / pricing date: 2026-01-26
- Exchange: NASDAQ
- Offering price: $10.00
- SEC CIK: 0002083910 · View the S-1 on SEC EDGAR →
Archimedes Tech SPAC Partners III Co. is pre-IPO, so no insider Form 4 transactions have been filed yet. Once insiders begin reporting trades after the offering, they will appear on this page automatically.
Track every registration update on the InsiderAlpha IPO tracker.
Last SEC filing
Archimedes Tech SPAC Partners III Co. (ARCI) - no SEC Form 4 insider filings recorded in the last 90 days. 1 Form 8-K material event filing was reported by ARCI in the last 90 days. InsiderAlpha tracks every ARCI SEC filing - Form 4, Form 144, and 8-K - in real time, including Rule 10b5-1 plan detection.
About Archimedes Tech SPAC Partners III Co. (ARCI)
Archimedes Tech SPAC Partners III Co. trades under the ticker ARCI. InsiderAlpha tracks 2 primary SEC Form 4 filings from 2 reporting insiders for ARCI since 2026, sourced directly from SEC EDGAR.
| SEC CIK | 0002083910 |
|---|
90-Day SEC Filing Activity
| Form 8-K filings (90d) | 1 |
|---|---|
| Latest Form 4 filing | 2026-01-26 |
Recent ARCI Insider Transactions (Form 4)
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Archimedes Tech SPAC Sponsors III LLC | 10% Owner | P - Open-market purchase | 390.0K | - | - | SEC | |
| Long Long | Chief Executive Officer | P - Open-market purchase | 390.0K | - | - | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Archimedes Tech SPAC Partners III Co. (ARCI). Updated in real time as new filings are submitted to the SEC.
Recent ARCI Form 8-K Material Events
- - Item 5.02 [SEC]
- - Item 5.02 [SEC]
- - Item 8.01, 9.01 · Other · neutral [SEC]
Archimedes Tech SPAC Partners III Co. announced that unit holders may elect to separately trade the ordinary shares and warrants included in the company's units starting on or about March 16, 2026. This is a routine administrative action allowing unit separation into component se
Recent Insider Filings
- - Archimedes Tech SPAC Sponsors III LLC (10% Owner)
- - Long Long (Chief Executive Officer)
Form 4 Transaction Code Reference
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ARCI insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
ARCI Insider Trading - FAQ
- What is the latest insider trade for ARCI?
- Archimedes Tech SPAC Partners III Co. (ARCI) had 0 insider filings in the last 90 days, with the most recent on 2026-01-26. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
- How many insiders are buying ARCI stock?
- 0 insider purchases of ARCI were filed in the last 90 days.
- How many insiders are selling ARCI stock?
- 0 insider sales of ARCI were filed in the last 90 days.
- Where can I see ARCI SEC filings (Form 4, 10-K, 10-Q, 8-K)?
- This page tracks ARCI Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Learn More
- What is SEC Form 4?
- How to read insider buying signals
- Rule 10b5-1 trading plans explained
- The cluster buying signal
Open the live ARCI dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.