Dennis P. Calvert

Companies

• BIOLARGO, INC.Board member Mar 19, 2007 to now¹
• BIOLARGO, INC.President Mar 19, 2007 to now¹
• BIOLARGO, INC.Chief executive officer Mar 19, 2007 to Jan 2, 2015¹
• BIOLARGO, INC.Chair Feb 3, 2010 to Mar 21, 2011²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• BBIOLARGO, INC. BLGO11,058,108 shares³$785.1K at $0.07Jul 1, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Jul 1, 2026Granted 219,914 shares at $0.11 of BIOLARGO, INC.³
• Jun 30, 2026Granted 699,569 shares at $0.11 of BIOLARGO, INC.³
• Dec 31, 2025Granted 130,222 shares at $0.18 of BIOLARGO, INC.⁴
• Nov 14, 2025Granted 310,269 shares at $0.16 of BIOLARGO, INC.⁵
• Jul 14, 2025Granted 169,498 shares at $0.20 of BIOLARGO, INC.⁶
• Dec 31, 2023Granted 50,557 shares at $0.17 of BIOLARGO, INC.⁷
• Jul 24, 2023Granted 50,553 shares at $0.18 of BIOLARGO, INC.⁸
• Oct 3, 2022Granted 100,549 shares at $0.27 of BIOLARGO, INC.⁹
• Jul 7, 2022Granted 156,111 shares at $0.18 of BIOLARGO, INC.¹⁰
• Dec 30, 2021Gift 156,000 shares of BIOLARGO, INC.¹¹