OTCBB:BLGO

Biolargo Stock Insider Trading

Basic Materials > Chemicals

Buy BLGO

*Your capital is at risk

$0.106

-0.0040 (-3.64%)

At Close: Aug 10, 2026

BioLargo Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be positive at 79.37. In total, the insiders bought 13.8M 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)	79.37
● Buy	13.8M shares
● Sell	300K shares
99% Buy Activity Moderate Positive Correlation
Buy Signal High Confidence Jun 30, 2026 Analysis Breakdown: Strongly supported by a very high Insider Power Score of 79.37. Partially supported by a positive historical correlation. 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
Sep 30, 2025 Buy	Option to Purchase Common Stock A-Award	Dargan Charles K Chief Financial Officer	C-Suite Officer	1 005 882 Value: $171.0K
Sep 30, 2025 Sell	Option to Purchase Common Stock J-Other	Dargan Charles K Chief Financial Officer	C-Suite Officer	300 000 Value: $171.0K
Sep 30, 2025 Buy	Option to Purchase Common Stock A-Award	Strommen Jack B. Director	Director	88 235 Value: $15.0K
Sep 30, 2025 Buy	Option to Purchase Common Stock A-Award	Park Linda Director	Director	110 294 Value: $18.7K
Sep 30, 2025 Buy	Option to Purchase Common Stock A-Award	Bray Christina Elaine Director	Director	110 294 Value: $18.7K
Sep 30, 2025 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	110 294 Value: $18.7K
Sep 30, 2025 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	132 351 Value: $22.5K
Sep 30, 2025 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	132 351 Value: $22.5K
Sep 30, 2025 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	110 294 Value: $18.7K
Sep 30, 2025 Buy	Option to Purchase Common Stock A-Award	Bray Christina Elaine Director	Director	110 294 Value: $18.7K
Sep 30, 2025 Buy	Option to Purchase Common Stock A-Award	Park Linda Director	Director	110 294 Value: $18.7K
Sep 30, 2025 Buy	Option to Purchase Common Stock A-Award	Strommen Jack B. Director	Director	88 235 Value: $15.0K
Jul 14, 2025 Buy	Common Stock A-Award	Calvert Dennis P President	CEO / President	169 498 Value: $33.9K
Jul 14, 2025 Buy	Common Stock A-Award	Code Kenneth Reay Chief Science Officer	Officer	181 253 Value: $36.3K
Jul 14, 2025 Buy	Common Stock A-Award	Code Kenneth Reay Chief Science Officer	Officer	181 253 Value: $36.3K
Jul 14, 2025 Buy	Common Stock A-Award	Calvert Dennis P President	CEO / President	169 498 Value: $33.9K
Jun 30, 2025 Buy	Option to Purchase Common Stock A-Award	Park Linda Director	Director	93 750 Value: $18.8K
Jun 30, 2025 Buy	Option to Purchase Common Stock A-Award	Strommen Jack B. Director	Director	75 000 Value: $15.0K
Jun 30, 2025 Buy	Option to Purchase Common Stock A-Award	Bray Christina Elaine Director	Director	93 750 Value: $18.8K
Jun 30, 2025 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	93 750 Value: $18.8K
Jun 30, 2025 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	112 501 Value: $22.5K
Jun 30, 2025 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	19 000 Value: $4K
Jun 30, 2025 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	19 000 Value: $4K
Jun 30, 2025 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	112 501 Value: $22.5K
Jun 30, 2025 Buy	Option to Purchase Common Stock A-Award	Marshall Dennis E Director	Director	93 750 Value: $18.8K

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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