Form 4 Filing for Avidia Bancorp, Inc.

This filing details a transaction by Saul Kennedy O, a director at Avidia Bancorp, Inc. (AVBC). On September 16, 2026, Mr. Kennedy acquired 20,076 shares of Common Stock and 50,190 Stock Options. The Common Stock acquisition is subject to a vesting schedule, with 20% vesting annually starting September 16, 2027. Similarly, the Stock Options vest at a rate of 20% per year, also commencing on September 16, 2027. Both the shares and options were acquired at a price of $0.00 per share. Following the transaction, Mr. Kennedy holds 30,126 shares of Common Stock and 50,190 Stock Options. The options have an exercise price of $22.29 and expire on September 16, 2036.