Reg FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549 ____________________ FORM 8-K _________________________________________ Current report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 14, 2023 _______________________ (Exact name of registrant as specified in its charter) _______________________ California 0-10661 94-2792841 (State or other jurisdiction of incorporation or organization) (Commission File No.) (I.R.S. Employer Identification No.) 63 Constitution Drive Chico, California 95973 (Address of principal executive offices) (Zip Code) Registrant’s telephone number, including area code: ( 530 )  898-0300 _____________________ 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) ☐ Soliciting material pursuant to rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) 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. ☐ Item 7.01 Regulation FD Disclosure Website Posting Concerning Internal Network and Operations On February 14, 2023, Tri Counties Bank (the “Bank”), the subsidiary of TriCo Bancshares (the “Company”), posted information on its website concerning a cybersecurity incident and its response. A copy of the posting is furnished as Exhibit 99.1 to this Current Report on Form 8-K. As more facts become known, subsequent updates are planned to be provided and made accessible via the Bank's website at www.tcbk.com. Investor Presentation Certain members of the Company's executive management team plan to be in attendance at the 30th Annual Winter Financial Services Conference hosted by Keefe, Bruyette & Woods on February 15 - 17, 2023. The attending executive officers of the Company intend to use the materials filed herewith, in whole or in part, in one or more presentations, discussions or meetings with investors. The information furnished with this Item 7.01, including Exhibits 99.1 and 99.2, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing. Item 9.01 Financial Statements and Exhibits (d) Exhibits 99. 1     Website Posting Concerning Internal Network and Operations dated February 14, 2023 99 .2     Investor Presentation (incorporated by reference to Exhibit 99.2 to TriCo’s Current Report on Form 8-K filed with the Commission on January 25, 2023) 104 Cover Page Interactive Data File (embedded within the Inline XBRL document). SIGNATURES 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. TRICO BANCSHARES Date: February 14, 2023 /s/ Peter G. Wiese Peter G. Wiese, Executive Vice President and Chief Financial Officer (Principal Financial and Accounting Officer)