OTCBB:BLGO

Biolargo Stock Insider Trading

Basic Materials > Chemicals

Buy BLGO

*Your capital is at risk

$0.110

+0.0098 (+9.75%)

At Close: Jun 03, 2026

BioLargo Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be positive at 74.38. In total, the insiders bought 12.4M and sold 300K BLGO shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	74.38
● Buy	12.4M shares
● Sell	300K shares
99% Buy Activity Weak Positive Correlation
Buy Signal High Confidence Mar 31, 2026 Analysis Breakdown: Strongly supported by a very high Insider Power Score of 74.38. Confidence increased due to high data reliability score of 100. Supported by overwhelming buy-side pressure (99% buys).

Historical Insider Trades

Date	Type	Person	Role	Amount
Jun 30, 2024 Buy	Option to Purchase Common Stock A-Award	Bray Christina Elaine Director	Director	73 529 Value: $18.7K
Jun 30, 2024 Buy	Option to Purchase Common Stock A-Award	Strommen Jack B. Director	Director	58 824 Value: $15.0K
Jun 28, 2024 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	88 237 Value: $22.5K
Jun 28, 2024 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	88 237 Value: $22.5K
Jun 23, 2024 Buy	Option to purchase common stock A-Award	Dargan Charles K Chief Financial Officer	C-Suite Officer	700 000 Value: $189.0K
Jun 23, 2024 Buy	Option to purchase common stock A-Award	Dargan Charles K Chief Financial Officer	C-Suite Officer	700 000 Value: $189.0K
Mar 31, 2024 Buy	Option to Purchase Common Stock A-Award	Strommen Jack B. Director	Director	42 857 Value: $15.0K
Mar 31, 2024 Buy	Option to Purchase Common Stock A-Award	Park Linda Director	Director	53 571 Value: $18.7K
Mar 31, 2024 Buy	Option to Purchase Common Stock A-Award	Bray Christina Elaine Director	Director	53 571 Value: $18.7K
Mar 31, 2024 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	53 571 Value: $18.7K
Mar 31, 2024 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	53 571 Value: $18.7K
Mar 31, 2024 Buy	Option to Purchase Common Stock A-Award	Bray Christina Elaine Director	Director	53 571 Value: $18.7K
Mar 31, 2024 Buy	Option to Purchase Common Stock A-Award	Park Linda Director	Director	53 571 Value: $18.7K
Mar 31, 2024 Buy	Option to Purchase Common Stock A-Award	Strommen Jack B. Director	Director	42 857 Value: $15.0K
Mar 28, 2024 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	64 176 Value: $22.5K
Mar 28, 2024 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	64 176 Value: $22.5K
Dec 31, 2023 Buy	Common stock A-Award	Code Kenneth Reay Chief Science Officer	Officer	72 621 Value: $12.2K
Dec 31, 2023 Buy	Common stock A-Award	Calvert Dennis P President	CEO / President	50 557 Value: $8K
Dec 31, 2023 Buy	Option to Purchase Common Stock A-Award	Park Linda Director	Director	111 607 Value: $18.7K
Dec 31, 2023 Buy	Option to Purchase Common Stock A-Award	Bray Christina Elaine Director	Director	111 607 Value: $18.7K
Dec 31, 2023 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	111 607 Value: $18.7K
Dec 31, 2023 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	133 929 Value: $22.5K
Dec 31, 2023 Buy	Option to Purchase Common Stock A-Award	Bray Christina Elaine Director	Director	111 607 Value: $18.7K
Dec 31, 2023 Buy	Option to Purchase Common Stock A-Award	Park Linda Director	Director	111 607 Value: $18.7K
Dec 31, 2023 Buy	Common stock A-Award	Calvert Dennis P President	CEO / President	50 557 Value: $8K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT BIOLARGO, INC

BioLargo, Inc. invents, develops, and commercializes various platform technologies. The company's technologies solve challenging environmental problems comprising per- and polyfluoroalkyl substances contamination, advanced water and wastewater treatment, industrial odor and VOC control, air quality control, and infection control. It holds various issued patents, maintains a pipeline of products, and provides full-service environmental engineering...

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