Form 4 Filing for Avidia Bancorp, Inc.

This filing details a transaction by Joseph F. Grimaldo, a director at Avidia Bancorp, Inc. On September 16, 2026, Grimaldo acquired 20,076 shares of Common Stock and 50,190 Stock Options. The Common Stock shares vest at 20% annually starting September 16, 2027, and the Stock Options also vest at 20% annually starting September 16, 2027. Following these transactions, Grimaldo