BLGO

Biolargo, INC.

Insider trading activity for Biolargo, INC., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 6 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 12 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Transaction history

The 47 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Sep 30	Calvert Dennis P	President	GGIFT	2M	—	—	+16.7%	Open the original filing on SEC.gov
Sep 30	Calvert Dennis P	President	AGRANT	931,886	$0.08	$74.6K	+8.4%	Open the original filing on SEC.gov
Sep 30	Code Kenneth Reay	Chief Science Officer	GGIFT	2M	—	—	-7.4%	Open the original filing on SEC.gov
Sep 30	Code Kenneth Reay	Chief Science Officer	AGRANT	566,261	$0.08	$45.3K	+2.1%	Open the original filing on SEC.gov
Sep 30	Marshall Dennis E	Director	AGRANT◆	234,375	—	—	—	Open the original filing on SEC.gov
Sep 30	Marshall Dennis E	Director	AGRANT◆	281,248	—	—	—	Open the original filing on SEC.gov
Sep 30	Bray Christina Elaine	Director	AGRANT◆	234,375	—	—	—	Open the original filing on SEC.gov
Sep 30	Strommen Jack B.	Director	AGRANT◆	187,500	—	—	—	Open the original filing on SEC.gov
Sep 30	Park Linda	Director	AGRANT◆	234,375	—	—	—	Open the original filing on SEC.gov
Jul 7	Code Kenneth Reay	Chief Science Officer	AGRANT	532,567	$0.1135	$60.4K	+2.1%	Open the original filing on SEC.gov
Jul 1	Calvert Dennis P	President	AGRANT	219,914	$0.113	$24.9K	+2.0%	Open the original filing on SEC.gov
Jun 30	Calvert Dennis P	President	AGRANT	699,569	$0.1135	$79.4K	+6.9%	Open the original filing on SEC.gov
Jun 30	Strommen Jack B.	Director	AGRANT◆	132,159	—	—	—	Open the original filing on SEC.gov
Jun 30	Park Linda	Director	AGRANT◆	165,198	—	—	—	Open the original filing on SEC.gov
Jun 30	Bray Christina Elaine	Director	AGRANT◆	165,198	—	—	—	Open the original filing on SEC.gov
Jun 30	Marshall Dennis E	Director	AGRANT◆	115,741	—	—	—	Open the original filing on SEC.gov
Jun 30	Marshall Dennis E	Director	AGRANT◆	198,238	—	—	—	Open the original filing on SEC.gov
Jun 22	Marshall Dennis E	Director	AGRANT◆	40,909	—	—	—	Open the original filing on SEC.gov
Mar 31	Strommen Jack B.	Director	AGRANT◆	92,593	—	—	—	Open the original filing on SEC.gov
Mar 31	Bray Christina Elaine	Director	AGRANT◆	115,741	—	—	—	Open the original filing on SEC.gov
Mar 31	Park Linda	Director	AGRANT◆	115,741	—	—	—	Open the original filing on SEC.gov
Mar 31	Marshall Dennis E	Director	AGRANT◆	115,741	—	—	—	Open the original filing on SEC.gov
Mar 31	Marshall Dennis E	Director	AGRANT◆	138,889	—	—	—	Open the original filing on SEC.gov
Mar 31	Code Kenneth Reay	Chief Science Officer	AGRANT	69,444	$0.162	$11.2K	+0.3%	Open the original filing on SEC.gov
Feb 1	Dargan Charles K	Chief Financial Officer	AGRANT◆	300,000	—	—	—	Open the original filing on SEC.gov
Dec 31, 2025	Code Kenneth Reay	Chief Science Officer	AGRANT	54,803	$0.1843	$10.1K	+0.2%	Open the original filing on SEC.gov
Dec 31, 2025	Calvert Dennis P	President	AGRANT	130,222	$0.1843	$24K	+1.3%	Open the original filing on SEC.gov
Dec 31, 2025	Park Linda	Director	AGRANT◆	101,736	—	—	—	Open the original filing on SEC.gov
Dec 31, 2025	Bray Christina Elaine	Director	AGRANT◆	101,736	—	—	—	Open the original filing on SEC.gov
Dec 31, 2025	Strommen Jack B.	Director	AGRANT◆	81,389	—	—	—	Open the original filing on SEC.gov
Dec 31, 2025	Marshall Dennis E	Director	AGRANT◆	101,736	—	—	—	Open the original filing on SEC.gov
Dec 31, 2025	Marshall Dennis E	Director	AGRANT◆	122,084	—	—	—	Open the original filing on SEC.gov
Nov 14, 2025	Code Kenneth Reay	Chief Science Officer	AGRANT	313,754	$0.16	$50.2K	+1.2%	Open the original filing on SEC.gov
Nov 14, 2025	Calvert Dennis P	President	AGRANT	310,269	$0.16	$49.6K	+3.1%	Open the original filing on SEC.gov
Sep 30, 2025	Strommen Jack B.	Director	AGRANT◆	88,235	—	—	—	Open the original filing on SEC.gov
Sep 30, 2025	Park Linda	Director	AGRANT◆	110,294	—	—	—	Open the original filing on SEC.gov
Sep 30, 2025	Bray Christina Elaine	Director	AGRANT◆	110,294	—	—	—	Open the original filing on SEC.gov
Sep 30, 2025	Marshall Dennis E	Director	AGRANT◆	110,294	—	—	—	Open the original filing on SEC.gov
Sep 30, 2025	Marshall Dennis E	Director	AGRANT◆	132,351	—	—	—	Open the original filing on SEC.gov
Jul 14, 2025	Calvert Dennis P	President	AGRANT	169,498	$0.2	$33.9K	+1.7%	Open the original filing on SEC.gov
Jul 14, 2025	Code Kenneth Reay	Chief Science Officer	AGRANT	181,253	$0.2	$36.3K	+0.7%	Open the original filing on SEC.gov
Jun 30, 2025	Park Linda	Director	AGRANT◆	93,750	—	—	—	Open the original filing on SEC.gov
Jun 30, 2025	Strommen Jack B.	Director	AGRANT◆	75,000	—	—	—	Open the original filing on SEC.gov
Jun 30, 2025	Bray Christina Elaine	Director	AGRANT◆	93,750	—	—	—	Open the original filing on SEC.gov
Jun 30, 2025	Marshall Dennis E	Director	AGRANT◆	93,750	—	—	—	Open the original filing on SEC.gov
Jun 30, 2025	Marshall Dennis E	Director	AGRANT◆	112,501	—	—	—	Open the original filing on SEC.gov
Jun 30, 2025	Marshall Dennis E	Director	AGRANT◆	19,000	—	—	—	Open the original filing on SEC.gov

GGIFT—

Calvert Dennis P · PresidentSep 30

2M sh · +16.7% own

AGRANT$74.6K

Calvert Dennis P · PresidentSep 30

931,886 sh @ $0.08 · +8.4% own

GGIFT—

Code Kenneth Reay · Chief Science…Sep 30

2M sh · -7.4% own

AGRANT$45.3K

Code Kenneth Reay · Chief Science…Sep 30

566,261 sh @ $0.08 · +2.1% own

AGRANT◆—

Marshall Dennis E · DirectorSep 30

234,375 sh

AGRANT◆—

Marshall Dennis E · DirectorSep 30

281,248 sh

AGRANT◆—

Bray Christina Elaine · DirectorSep 30

234,375 sh

AGRANT◆—

Strommen Jack B. · DirectorSep 30

187,500 sh

AGRANT◆—

Park Linda · DirectorSep 30

234,375 sh

AGRANT$60.4K

Code Kenneth Reay · Chief Science…Jul 7

532,567 sh @ $0.1135 · +2.1% own

AGRANT$24.9K

Calvert Dennis P · PresidentJul 1

219,914 sh @ $0.113 · +2.0% own

AGRANT$79.4K

Calvert Dennis P · PresidentJun 30

699,569 sh @ $0.1135 · +6.9% own

AGRANT◆—

Strommen Jack B. · DirectorJun 30

132,159 sh

AGRANT◆—

Park Linda · DirectorJun 30

165,198 sh

AGRANT◆—

Bray Christina Elaine · DirectorJun 30

165,198 sh

AGRANT◆—

Marshall Dennis E · DirectorJun 30

115,741 sh

AGRANT◆—

Marshall Dennis E · DirectorJun 30

198,238 sh

AGRANT◆—

Marshall Dennis E · DirectorJun 22

40,909 sh

AGRANT◆—

Strommen Jack B. · DirectorMar 31

92,593 sh

AGRANT◆—

Bray Christina Elaine · DirectorMar 31

115,741 sh

AGRANT◆—

Park Linda · DirectorMar 31

115,741 sh

AGRANT◆—

Marshall Dennis E · DirectorMar 31

115,741 sh

AGRANT◆—

Marshall Dennis E · DirectorMar 31

138,889 sh

AGRANT$11.2K

Code Kenneth Reay · Chief Science…Mar 31

69,444 sh @ $0.162 · +0.3% own

AGRANT◆—

Dargan Charles K · Chief Financial…Feb 1

300,000 sh

AGRANT$10.1K

Code Kenneth Reay · Chief Science…Dec 31, 2025

54,803 sh @ $0.1843 · +0.2% own

AGRANT$24K

Calvert Dennis P · PresidentDec 31, 2025

130,222 sh @ $0.1843 · +1.3% own

AGRANT◆—

Park Linda · DirectorDec 31, 2025

101,736 sh

AGRANT◆—

Bray Christina Elaine · DirectorDec 31, 2025

101,736 sh

AGRANT◆—

Strommen Jack B. · DirectorDec 31, 2025

81,389 sh

AGRANT◆—

Marshall Dennis E · DirectorDec 31, 2025

101,736 sh

AGRANT◆—

Marshall Dennis E · DirectorDec 31, 2025

122,084 sh

AGRANT$50.2K

Code Kenneth Reay · Chief Science…Nov 14, 2025

313,754 sh @ $0.16 · +1.2% own

AGRANT$49.6K

Calvert Dennis P · PresidentNov 14, 2025

310,269 sh @ $0.16 · +3.1% own

AGRANT◆—

Strommen Jack B. · DirectorSep 30, 2025

88,235 sh

AGRANT◆—

Park Linda · DirectorSep 30, 2025

110,294 sh

AGRANT◆—

Bray Christina Elaine · DirectorSep 30, 2025

110,294 sh

AGRANT◆—

Marshall Dennis E · DirectorSep 30, 2025

110,294 sh

AGRANT◆—

Marshall Dennis E · DirectorSep 30, 2025

132,351 sh

AGRANT$33.9K

Calvert Dennis P · PresidentJul 14, 2025

169,498 sh @ $0.2 · +1.7% own

AGRANT$36.3K

Code Kenneth Reay · Chief Science…Jul 14, 2025

181,253 sh @ $0.2 · +0.7% own

AGRANT◆—

Park Linda · DirectorJun 30, 2025

93,750 sh

AGRANT◆—

Strommen Jack B. · DirectorJun 30, 2025

75,000 sh

AGRANT◆—

Bray Christina Elaine · DirectorJun 30, 2025

93,750 sh

AGRANT◆—

Marshall Dennis E · DirectorJun 30, 2025

93,750 sh

AGRANT◆—

Marshall Dennis E · DirectorJun 30, 2025

112,501 sh

AGRANT◆—

Marshall Dennis E · DirectorJun 30, 2025

19,000 sh

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

All 36 filings we hold were filed within the two-business-day deadline.

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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