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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): July 15, 2026

RLI Corp.

(Exact name of registrant as specified in its charter)

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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:

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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. ☐

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Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

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(d) On July 15, 2026, the RLI Corp. (“RLI”) Board of Directors (“Board”) appointed James H. Bradshaw as member of the Board, effective July 15, 2026.  The Board has determined that Mr. Bradshaw is an independent director under applicable rules of the New York Stock Exchange. The Board appointed Mr. Bradshaw as a member of the Audit and Finance & Risk Committees of the Board. Mr. Bradshaw will stand for election at RLI’s next annual shareholders’ meeting.  

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As non-employee member of the Board, Mr. Bradshaw will receive compensation pursuant to RLI’s standard arrangements for non-employee directors.

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There is no arrangement or understanding between Mr. Bradshaw and any other persons pursuant to which he was appointed as a director. Furthermore, there are no transactions between Mr. Bradshaw 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. Bradshaw as director.

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Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

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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.

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