Executive Change

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): October 28, 2022 RLI Corp. (Exact name of registrant as specified in its charter) ​ ​ ​ ​ ​ ​ Delaware ​ 001-09463 ​ 37-0889946 (State or other jurisdiction ​ (Commission ​ (IRS Employer of incorporation) ​ File Number) ​ Identification No.) ​ ​ ​ ​ ​ 9025 North Lindbergh Drive , Peoria , IL ​ 61615 (Address of principal executive offices) ​ (Zip Code) ​ Registrant’s telephone number, including area code: ( 309 ) 692-1000 Not applicable (Former name or former address, if changed since last report.) 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: ☐ 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 Securities Exchange Act of 1934: ​ ​ ​ ​ ​ ​ Title of each class      Trading Symbol      Name of each exchange on which registered Common Stock $0.01 par value ​ RLI ​ New York Stock Exchange ​ 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 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. ​ (d)  On October 28, 2022, the RLI Corp. (“RLI”) Board of Directors (“Board”) appointed Paul B. Medini as member of the Board, effective November 1, 2022.  The Board has determined that Mr. Medini is an independent directors under applicable rules of the New York Stock Exchange. Mr. Medini will stand for election at RLI’s next annual shareholders’ meeting to be held May 4, 2023.   As non-employee member of the Board, Mr. Medini will receive compensation pursuant to RLI’s standard arrangements for non-employee directors. ​ There is no arrangement or understanding between Mr. Medini and any other persons pursuant to which he was appointed as a director. Furthermore, there are no transactions between Mr. Medini and the Company that would be required to be reported under Item 404(a) of Regulation S-K.   Furnished as Exhibit 99.1 and incorporated herein by reference is a copy of the press release issued by RLI relating to the appointment of Mr. Medini as director. ​ ​ Item 9.01 Financial Statements and Exhibits. (d) Exhibits ​ Exhibit No.      Description ​ ​ ​ 99.1 ​ Press Release dated November 1, 2022. 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 hereunto duly authorized. ​ ​ ​ ​ ​ RLI CORP. ​ ​ ​ Date: November 1, 2022 By: /s/ Jeffrey D. Fick ​ ​ Jeffrey D. Fick ​ Chief Legal Officer & Corporate Secretary ​ ​ ​