The number of shares of common stock, par value $0.25, of Northrim BanCorp, Inc. ("Northrim" and, such shares, the "Northrim common stock") being registered is based upon (i) an estimate of the maximum number of shares of common stock, par value $5.00 per share, of PBCO Financial Corporation ("PBCO" and, such shares, the "PBCO common stock") outstanding as of August 21, 2026, or issuable or expected to be exchanged in connection with the merger of PBCO with and into Whitewater Sub, Inc. ("Merger Sub"), a wholly owned subsidiary of Northrim, with Merger Sub as the surviving corporation (the "merger"), pursuant to the Agreement and Plan of Merger, dated as of July 22, 2026, by and among Northrim, PBCO, and Merger Sub (the "merger agreement"), which collectively equal to 5,133,967, multiplied by (ii) the exchange ratio of 1.160 shares of Northrim common stock for each share of PBCO common stock, as described in the Registration Statement on Form S-4 to which this exhibit is attached.

Estimated solely for the purpose of calculating the registration fee required by Section 6(b) of the Securities Act of 1933, as amended (the "Securities Act"), and calculated in accordance with Rules 457(c) and 457(f)(1) promulgated thereunder. The maximum aggregate offering price is (i) the average of the high and low sales prices for shares of PBCO common stock as reported on the OTCID on August 21, 2026 ($29.37 per share), multiplied by (ii) the estimated maximum number of shares of PBCO common stock to be converted in the merger (5,133,967).