NORTHRIM BANCORP INC

proxy statement of PBCO and Northrim that also constitutes a prospectus of Northrim. After the registration statement is declared effective by the SEC, each of Northrim and PBCO will mail a definitive proxy statement/prospectus to its respective shareholders. Before making any voting decision, the shareholders of each of PBCO and Northrim are advised to read the joint proxy statement/prospectus when it becomes available because it will contain important information about Northrim, PBCO, the Merger Agreement and the Merger. When filed, this document and other documents relating to the Merger filed by Northrim can be obtained free of charge from the SEC’s website at www.sec.gov. These documents also can be obtained free of charge through Northrim’s investor relations website at https://ir.northrim.com by clicking on “SEC Filings” under the “Financials” tab. Alternatively, these documents, when available, can be obtained free of charge from Northrim upon written request to Northrim, Attn: Investor Relations, PO Box 241489, Anchorage, Alaska 99524-1489 or by calling (907) 562-0062. The contents of the websites referenced above are not deemed to be incorporated by reference into the registration statement or the proxy statement/prospectus. Participants in the Solicitation This presentation does not constitute a solicitation of proxy, an offer to sell or a solicitation of an offer to sell any securities. Northrim, PBCO, and certain of their directors, executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies from the shareholders of PBCO and Northrim in connection with the proposed Merger under SEC rules. Information about the directors and executive officers of Northrim and PBCO will be included in the proxy statement/prospectus for the proposed transaction filed with the SEC. These documents (when available) may be obtained free of charge in the manner described above under “Additional Information and Where to Find It.” Information about such directors and executive officers of Northrim and their direct or indirect interests, by security holdings or otherwise, can be found in Northrim’s proxy statement in connection with its 2026