Transaction · 0001437749-26-031933

Marshall Dennis E

Marshall Dennis E, DIR, reported a transaction classified as grant at BIOLARGO, INC. involving 234375.000000 shares. Reported holdings after the transaction were 6290692.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

grantSEC transaction code ADIR
BLGOBIOLARGO, INC.
Filing timeOct 02
Trade dateSep 30, 2026
Filing · SECView on SEC
InsiderProfile
% of reported position tradedUnavailableNot calculated for derivative securities.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
—
Pre-filing
1mo ago1w ago1d ago
Returns since
7d30d90d180d1y

BLGO price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
BLGO since 2026-10-02Filed yesterday · 1 day of post-filing data
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Derivative
Type
grant
Code A
Identifier
0001437749-26-031933
Option to Purchase Common Stock
Transaction date
Sep 30, 2026
Filed Oct 02, 2026, 10:36 PM · 2d delay
Shares
234k sh
Price unknown
Estimated value
—
Computed from shares × price
Holdings after
6.29M sh
Direct

Filing warnings

Notes recorded with this filing
1 warning
missing priceThe filing did not provide a usable price per share.

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Derivative Transaction Direct Ownership
-14score
Filing-only score

-14

Compact filing score computed from stored Form 4 facts. Version v1.

Mixed or weak signal

This filing has a negative filing-only score. It may be less informative as an insider-activity signal and needs extra context.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    This Option was granted to Reporting Person to replace an option to purchase 29,605 shares that had been issued to compensate Reporting Person for services to the Issuer and had expired unexercised du…

  2. F2

    Total reflects the expiration of options to purchase 29,605 shares that expired unexercised on September 30, 2026.

  3. F3

    This Option was issued to Reporting Person as payment for $18,750 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly…

Original filing · 0001437749-26-031933
Related transactions

0 other filings

Same reporting owner
Recent company activity

0 recent txs

BLGO