falseTriCo Bancshares000035617100003561712025-12-022025-12-02

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐			Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock, no par value

TCBK

Nasdaq

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

As an update to the Company's 8-K filing on February 28, 2025, John S. Fleshood, former Executive Vice President & Chief Operating Officer retired from his position at TriCo Bancshares (the "Company"), effective December 2, 2025. Mr. Fleshood’s decision to retire was not the result of any disagreement with the Company on any matter relating to the Company's operations, policies, or practices.

The Board of Directors thanks Mr. Fleshood for his service and wishes him the best.

Consistent with the Agreements associated with equity compensation awards previously issued to Mr. Fleshood, where applicable, any outstanding and unvested restricted stock units will continue to vest in accordance with the original vesting schedule.

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.