Business Description

Overview Heritage Financial Corporation is a bank holding company that was incorporated in the State of Washington in August 1997. We are primarily engaged in the business of planning, directing, and coordinating the business activities of our wholly-owned subsidiary and single reportable segment, Heritage Bank. Heritage Bank is headquartered in Olympia, Washington and conducts business from its 50 branch offices located throughout Washington State, the greater Portland, Oregon area, Eugene, Oregon and Boise, Idaho and its one loan production office in Spokane, Washington as of December 31, 2025. Heritage Bank also does business under the Whidbey Island Bank name on Whidbey Island, Washington. On January 31, 2026, Heritage completed its acquisition of Olympic and Olympic’s wholly-owned banking subsidiary, Kitsap Bank. The acquisition added 16 branch offices to the franchise, doing business under the Kitsap Bank name as a division of Heritage Bank. The deposits of the Bank are insured by the FDIC. Our business consists primarily of commercial lending and deposit relationships with small and medium-sized businesses and their owners in our market areas and attracting deposits from the general public. We also make real estate construction and land development loans and consumer loans. 6 Table of Contents Recent Acquisition On January 31, 2026, the Company completed its acquisition of Olympic Bancorp, Inc., a bank holding company headquartered in Port Orchard, Washington, pursuant to the Agreement and Plan of Bank Merger, dated as of September 25, 2025, by and between the Company and Olympic (the "merger agreement"), whereby Olympic merged with and into the Company, and subsequently Kitsap Bank, Olympic's wholly-owned banking subsidiary, merged with and into the Bank. Pursuant to the terms of the merger agreement, Olympic shareholders received 45.0 shares of Heritage common stock for each share of Olympic common stock based on a fixed exchange ratio. Olympic's principal activity was the ownership and operation of Kitsap Bank, a state-chartered banking institution that operated sixteen branches in Washington at the time of closing. The merger consideration, consisting of 7,167,600 shares of Heritage common stock, totaled approximately $185.0 million, based on the closing price of Heritage common stock on January 30, 2026, as reported on the Nasdaq Global Select Market. At close, Olympic had total assets of approximately $1.6 billion, loans of approximately $0.9 billion and deposits of approximately $1.4 billion. The Company accounts for these transactions under the acquisition method of accounting, and thus, the financial position and results of operations of acquired institutions prior to the consummation date are not included in the accompanying consolidated financial statements. The acquisition method of accounting requires assets purchased and liabilities assumed to be recorded at their respective fair values at the date of acquisition. The Company determines the fair value of core deposit intangibles, securities, premises and equipment, loans, other assets and liabilities, deposits and borrowings with the assistance of third party valuations, appraisals, and third party advisors. The estimated fair values are subject to refinement for up to one year after deal consummation as additional information becomes available relative to the closing date fair values. Business Strategy We are committed to being the leading commercial community bank in the Pacific Northwest by continuously improving customer satisfaction, employee empowerment, community investment and shareholder value. Our commitment defines our relationships, sets expectations for our actions and directs decision-making in these four fundamental areas. We seek to achieve our business goals through the following strategies: Expand geographically as opportunities present themselves. We are committed to continuing the controlled expansion of our franchise through strategic acquisitions designed to increase our market share and enhance franchise value. We believe that consolidation across the community bank landscape will continue to take place and further believe that, with our capital and liquidity positions, our approach to credit management, and our extensive acquisition experience, we are well-positioned to take advantage of acquisitions or other business opportunities in our market areas.…