X0609 4 2026-08-11 0002058758 Avidia Bancorp, Inc. AVBC 0002076312 Saul Kennedy O false 42 MAIN ST HUDSON MA 01749 1 0 Common Stock 2026-08-11 4 P 0 13 21.61 A 4163 D Common Stock 2026-08-11 4 P 0 513 21.62 A 4676 D Common Stock 2026-08-11 4 P 0 145 21.63 A 4821 D Common Stock 2026-08-11 4 P 0 79 21.64 A 4900 D Common Stock 2026-08-11 4 P 0 4278 21.65 A 9178 D Common Stock 2026-08-11 4 P 0 872 21.67 A 10050 D /s/ Victor L. Cangelosi, pursuant to power of attorney 2026-08-12