X0609 4 2026-03-16 0 0001046025 HERITAGE FINANCIAL CORP /WA/ HFWA 0001961151 Ray Matthew T. 201 5TH AVE SW OLYMPIA WA 98501 0 1 0 0 EVP Chief Lending Officer 0 Common Stock 2026-03-16 4 M 0 504 24.89 A 23164 D Common Stock 2026-03-16 4 M 0 155 24.89 A 23319 D Common Stock 2026-03-16 4 M 0 662 24.89 A 23981 D Common Stock 2026-03-16 4 M 0 530 24.89 A 24511 D Common Stock 2026-03-16 4 M 0 1664 24.89 A 26175 D Common Stock 2026-03-16 4 M 0 1001 24.89 A 27176 D Common Stock 2026-03-16 4 F 0 749 24.89 D 26427 D Restricted Stock Units 0 2026-03-16 4 M 0 504 24.89 D 2023-03-15 2028-03-15 Common Stock 504 1008 D Restricted Stock Units 0 2026-03-16 4 M 0 155 24.89 D 2023-03-15 2027-03-15 Common Stock 155 155 D Restricted Stock Units 0 2026-03-16 4 M 0 662 24.89 D 2024-03-15 2026-03-15 Common Stock 662 0 D Restricted Stock Units 0 2026-03-16 4 M 0 530 24.89 D 2024-03-15 2033-03-15 Common Stock 530 3714 D Restricted Stock Units 0 2026-03-16 4 M 0 1664 24.89 D 2025-03-15 2027-03-15 Common Stock 1664 1664 D Restricted Stock Units 0 2026-03-16 4 M 0 1001 24.89 D 2026-03-15 2028-03-15 Common Stock 1001 2003 D RSU award granted 03/01/2018 RSU award granted 02/22/2022 RSU Grant February 2024 Represents award pursuant to 2024 Omnibus Equity Plan; shares vest one third per year over a three year period. Each restricted stock unit represents the right to receive one share of the Issuer's Common Stock upon vesting. RSU Grant February 2025 Represents award pursuant to 2023 Omnibus Equity Plan; shares vest one third per year over a three year period. Each restricted stock unit represents the right to receive one share of the Issuer's Common Stock upon vesting. /s/Kaylene Lahn Attorney in Fact for Matthew Ray 2026-03-18