Marshall Dennis E
SEC insider (Form 3/4/5 filer). CIK 0001361115. Director at BIOLARGO, INC. (BLGO). 18 reported Form 4/5 transactions since Sep 2024; latest on Sep 30, 2026. Located in WESTMINSTER, CA.
Companies Marshall Dennis E has filed insider reports for
- BIOLARGO, INC. (BLGO): Director
Marshall Dennis E
CIK: 0001361115
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
BIOLARGO, INC.
Discretionary Trading P&L
Holdings
Transaction History (18 total)
- Sep 30, 2026BLGO
BIOLARGO, INC.
AwardDirectOption to Purchase Common Stock
234.4K shares- - Sep 30, 2026BLGO
BIOLARGO, INC.
AwardDirectOption to Purchase Common Stock
281.2K shares- - Jun 30, 2026BLGO
BIOLARGO, INC.
AwardDirectOption to Purchase Common Stock
198.2K shares- - Jun 30, 2026BLGO
BIOLARGO, INC.
AwardDirectOption to Purchase Common Stock
115.7K shares- - Jun 22, 2026BLGO
BIOLARGO, INC.
AwardDirectOption to Purchase Common Stock
40.9K shares- - Mar 31, 2026BLGO
BIOLARGO, INC.
AwardDirectOption to Purchase Common Stock
138.9K shares- - Mar 31, 2026BLGO
BIOLARGO, INC.
AwardDirectOption to Purchase Common Stock
115.7K shares- - Dec 31, 2025BLGO
BIOLARGO, INC.
AwardDirectOption to Purchase Common Stock
122.1K shares- - Dec 31, 2025BLGO
BIOLARGO, INC.
AwardDirectOption to Purchase Common Stock
101.7K shares- - Sep 30, 2025BLGO
BIOLARGO, INC.
AwardDirectOption to Purchase Common Stock
132.4K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Sep 30, 2026 | BLGO BIOLARGO, INC. | Award Option to Purchase Common Stock | 234,375 | - | - | Direct |
| Sep 30, 2026 | BLGO BIOLARGO, INC. | Award Option to Purchase Common Stock | 281,248 | - | - | Direct |
| Jun 30, 2026 | BLGO BIOLARGO, INC. | Award Option to Purchase Common Stock | 198,238 | - | - | Direct |
| Jun 30, 2026 | BLGO BIOLARGO, INC. | Award Option to Purchase Common Stock | 115,741 | - | - | Direct |
| Jun 22, 2026 | BLGO BIOLARGO, INC. | Award Option to Purchase Common Stock | 40,909 | - | - | Direct |
| Mar 31, 2026 | BLGO BIOLARGO, INC. | Award Option to Purchase Common Stock | 138,889 | - | - | Direct |
| Mar 31, 2026 | BLGO BIOLARGO, INC. | Award Option to Purchase Common Stock | 115,741 | - | - | Direct |
| Dec 31, 2025 | BLGO BIOLARGO, INC. | Award Option to Purchase Common Stock | 122,084 | - | - | Direct |
| Dec 31, 2025 | BLGO BIOLARGO, INC. | Award Option to Purchase Common Stock | 101,736 | - | - | Direct |
| Sep 30, 2025 | BLGO BIOLARGO, INC. | Award Option to Purchase Common Stock | 132,351 | - | - | Direct |
1-10 of 18 transactions