Form 4 Filing for BIOLARGO, INC.

This filing details transactions by Kenneth Reay Code, Chief Science Officer and Director of BIOLARGO, INC. On September 30, 2026, Code acquired 566,261 shares of Common Stock at $0.08 per share, with the acquisition being subject to a lock-up agreement. This agreement restricts sales until the company achieves $40 million in gross revenue, has a market capitalization exceeding $300 million, or undergoes a change in control. The shares were received in exchange for a reduction in owed salary and expenses. Additionally, 2,000,000 shares were disposed of with no cost basis. Following these transactions, Code holds a total of 24,974,580 shares, including 22,139,012 shares held indirectly through a corporation. The filing also includes a limited power of attorney authorizing John R. Browning to handle Section 16 reporting obligations.