BIOLARGO, INC. (BLGO) IPO — S-1 Filing, Stock & Insider Activity

BIOLARGO, INC. IPO — Status & S-1 Filing

Ticker: BLGO
Status: Registered — S-1 filed with the SEC
S-1 filed: 2026-04-09
Exchange: NASDAQ
Expected price range: $0.17–$0.28
Shares offered: 30,000,000
SEC CIK: 0000880242 · View the S-1 on SEC EDGAR →

Track every registration update on the InsiderAlpha IPO tracker.

Updated Jul 16, 2026 · Last SEC filing 2026-07-07

BIOLARGO, INC. (BLGO) has filed 7 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-07. 2 Form 8-K material event filings were reported by BLGO in the last 90 days. InsiderAlpha tracks every BLGO SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About BIOLARGO, INC. (BLGO)

SIC classification	Chemicals & Allied Products (SIC 2800)
SEC CIK	0000880242

90-Day SEC Filing Activity

Form 4 filings (90d)	7
Form 8-K filings (90d)	2
Latest Form 4 filing	2026-07-07

Recent BLGO Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2026-07-07	CODE KENNETH REAY	Chief Science Officer	A — Grant or award	532.6K	$0.11	$60K	SEC
2026-07-01	CALVERT DENNIS P	President	A — Grant or award	219.9K	$0.11	$25K	SEC
2026-06-30	CALVERT DENNIS P	President	A — Grant or award	699.6K	$0.11	$79K	SEC
2026-03-31	CODE KENNETH REAY	Chief Science Officer	A — Grant or award	69.4K	$0.16	$11K	SEC
2025-07-14	CALVERT DENNIS P	President	A — Grant or award	169.5K	$0.20	$34K	SEC
2025-07-14	CODE KENNETH REAY	Chief Science Officer	A — Grant or award	181.3K	$0.20	$36K	SEC

All transactions sourced from SEC EDGAR Form 4 filings for BIOLARGO, INC. (BLGO). Updated in real time as new filings are submitted to the SEC.

Most-Active BLGO Insiders — Last 90 Days

Insider	Form 4 filings	Total transaction value
Marshall Dennis E	3	—
CALVERT DENNIS P	2	$104K
STROMMEN JACK B.	1	—
Park Linda	1	—
Bray Christina Elaine	1	—

Recent BLGO Form 8-K Material Events

2026-05-06 — Item 7.01, 9.01 [SEC]
2026-05-04 — Item 7.01, 9.01 [SEC]
2026-03-25 — Item 1.01, 3.02, 9.01 · Financing · positive [SEC]
BioLargo entered into a committed equity financing agreement with Clearthink Capital Partners for up to $10.0 million of common stock over a 36-month period. The company has the right to sell shares at its discretion, with individual purchases capped at $500,000 or 300% of daily
2026-03-05 — Item 7.01, 9.01 · Other · neutral [SEC]
BioLargo, Inc. disclosed that it intends to present investor slides at a webcast conference on March 5, 2026, and published an accompanying press release. This is a routine Regulation FD disclosure of a corporate presentation with no material business developments, financial resu

Recent Insider Filings

2026-07-07 — CODE KENNETH REAY (Chief Science Officer)
2026-07-03 — CALVERT DENNIS P (President)
2026-07-02 — STROMMEN JACK B. (Director)
2026-07-02 — Park Linda (Director)
2026-07-02 — Bray Christina Elaine (Director)

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 BLGO 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

BLGO Insider Trading — FAQ

What is the latest insider trade for BLGO?: BIOLARGO, INC. (BLGO) had 7 insider filings in the last 90 days, with the most recent on 2026-07-07. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying BLGO stock?: 0 insider purchases of BLGO were filed in the last 90 days.
How many insiders are selling BLGO stock?: 0 insider sales of BLGO were filed in the last 90 days.
Where can I see BLGO SEC filings (Form 4, 10-K, 10-Q, 8-K)?: InsiderAlpha aggregates every BLGO SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

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