X0609 4 2026-04-06 0000737468 WASHINGTON TRUST BANCORP INC WASH 0001614678 Ohsberg Ronald S. false 33 BELLE ISLE WAY CRANSTON RI 02921 true SEVP, CFO and Treasurer false Common Stock 2026-04-06 4 A false 2535 0 A 28984.489 D Common Stock 2026-04-06 4 F false 1149 34.16 D 27835.489 D /s/Kristen L. DiSanto, Attorney-in-Fact 2026-04-08