Form 4 Filing for Robert E. Hoffman

This filing details a Form 4 submitted by Robert E. Hoffman, a director at FibroBiologics, Inc. (FBLG). On June 23, 2026, Hoffman acquired 30,803 stock options with a right to buy at a price of $0.7503 per share. These options have an exercise date subject to vesting conditions, with full vesting occurring on the earlier of the first anniversary of the grant date or the next annual meeting. The options expire on June 22, 2036. This transaction is marked as direct ownership and is a grant of options (transaction code A). Following this acquisition, Hoffman directly owns 30,803 shares of the underlying common stock.