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COLUMBIA BANKING SYSTEM, INC.

For the period ended Mar 31, 2026. Filed May 5, 2026.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2026 · Filed May 5, 2026

COLB$30.85-0.5%Stored close · as of Nov 10, 2026

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Unregistered Sales of Equity Securities and Use of Proceeds

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(a)Not applicable

(b)Not applicable

(c)The following table provides information regarding repurchases of the Company's common stock during the quarter ended March 31, 2026:

PeriodTotal number of Common Shares Purchased (in thousands) (1)Average Price Paid per Common ShareTotal Number of Shares Purchased as Part of Publicly Announced Plan (in thousands) (2)Maximum Dollar Value of Shares that May be Purchased at Period End under the Plan (in millions) (2)
01/01/26 - 01/31/2659$28.41—$600
02/01/26 - 02/28/265,310$31.235,180$438
03/01/26 - 03/31/261,598$28.441,315$400
Total for quarter6,966$30.566,494

(1)Common shares repurchased by the Company during the quarter included the cancellation of 471,737 shares that otherwise would have been issued upon vesting of restricted stock units and awards to satisfy withholding tax obligations.

(2)On October 29, 2025, Columbia's Board of Directors authorized a new share repurchase program for up to $700 million of the Company's common stock, The authorization is effective through November 30, 2026. During the quarter ended March 31, 2026, the Company repurchased 6.5 million shares for an aggregate purchase price of $200 million. As of March 31, 2026, $400 million remained available for future share repurchases. The timing and amount of future repurchases will depend upon a number of factors, including the market price for the Company's common stock, applicable laws and regulations, asset growth, earnings, the Company's capital plan, and required bank and bank holding company regulatory approvals.

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