Exhibit 99.4

 

CONSENT OF KEEFE, BRUYETTE & WOODS, INC.

We hereby consent to the inclusion of our opinion letter to the Board of Directors of Pacific Premier Bancorp, Inc. (“Pacific Premier”), as Annex C to the joint proxy statement/prospectus which forms a part of Amendment No. 1 to the registration statement on Form S-4 (Registration No. 333-287607) filed on the date hereof (the “Amended Registration Statement”) relating to the proposed merger of Balboa Merger Sub, Inc., a wholly-owned subsidiary of Columbia Banking System, Inc., with and into Pacific Premier and to the references to such opinion and the quotation or summarization of such opinion contained therein.

In giving such consent, we do not admit that we come within the category of persons whose consent is required under Section 7 of the Securities Act of 1933, as amended (the “Securities Act”), or the rules and regulations of the Securities and Exchange Commission thereunder, nor do we hereby admit that we are experts with respect to any part of the Amended Registration Statement within the meaning of the term “experts” as used in the Securities Act or the rules and regulations of the Securities and Exchange Commission thereunder.

 

KEEFE, BRUYETTE & WOODS, INC.

Dated: June 13, 2025