The Board of Directors of TriCo Bancshares (NASDAQ:TCBK) (the "Company"), parent company of Tri Counties Bank, declared a quarterly cash dividend of $0.36 (thirty-six cents) per share on its common stock, no par value, on August 20, 2026. The dividend is payable on September 25, 2026, to holders of record as of September 11, 2026, and represents the 148th consecutive quarterly cash dividend paid to shareholders.

Established in 1975, Tri Counties Bank is a wholly-owned subsidiary of TriCo Bancshares (NASDAQ:TCBK) headquartered in Chico, California, with assets of nearly $10 billion and over 50 years of financial stability. Tri Counties Bank is dedicated to providing exceptional service for individuals and businesses throughout California. Tri Counties Bank provides an extensive and competitive breadth of consumer, small business and commercial banking financial services, along with convenient around-the-clock ATM, online and mobile banking access. Brokerage services are provided by Tri Counties Advisors through affiliation with Raymond James Financial Services, Inc. Visit www.TriCountiesBank.com to learn more.

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Peter G. Wiese, EVP & CFO, (530) 898-0300