Heritage Financial Corporation

Item 2.02 Results of Operations and Financial Condition On July 23, 2026, Heritage Financial Corporation (“Heritage”) issued a press release announcing its second quarter 2026 results. A copy of the release is attached hereto as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished pursuant to this Item and the related exhibit is being “furnished” and will not, except to the extent required by applicable law or regulation, be deemed “filed” by Heritage for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as may be expressly set forth by specific reference in such filing.

Item 7.01 Regulation FD Disclosure Heritage is filing an investor presentation that it reviewed in conjunction with its earnings release conference call on July 23, 2026. A copy of the presentation materials is attached hereto as Exhibit 99.2 to this Current Report on Form 8-K and is incorporated herein by reference. The information furnished pursuant to this Item and the related exhibit is being “furnished” and will not, except to the extent required by applicable law or regulation, be deemed “filed” by Heritage for purposes of Section 18 of the Exchange Act, or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as may be expressly set forth by specific reference in such filing.

Item 8.01 Other Events On July 23, 2026, Heritage issued a press release announcing a regular quarterly cash dividend of $0.25 per common share. The dividend will be paid on August 19, 2026 to shareholders of record at the close of business on August 5, 2026. A copy of the release is attached hereto as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.