RLI CORP 10-Q

Item 5. Other Information – ​ Securities Trading Plans of Executive Officers and Directors ​ Rule 10b5-1 under the Exchange Act provides an affirmative defense that enables prearranged transactions in Company securities in a manner that avoids concerns about initiating transactions at a future date while possibly in possession of material nonpublic information. Our Insider Trading Policy permits our executive officers and directors to enter into trading plans designed to comply with Rule 10b5-1. ​ During the three months ended September 30, 2025, no director or officer of the Company adopted or terminated a Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement, as each term is defined in Item 408(a) of Regulation S-K. ​ Item 6. Exhibits ​ Exhibit ​ ​ ​ Incorporated by Reference ​ Filed or Furnished Number Description of Document Form Filing Date Herewith ​ ​ ​ ​ ​ ​ ​ ​ 31.1 ​ Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ 31.2 ​ Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ 32.1 ​ Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ 32.2 ​ Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ 101.INS ​ Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ 101.SCH ​ Inline XBRL Taxonomy Extension Schema ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ 101.CAL ​ Inline XBRL Taxonomy Extension Calculation Linkbase ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ 101.DEF ​ Inline XBRL Taxonomy Definition Linkbase ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ 101.LAB ​ Inline XBRL Taxonomy Extension Label Linkbase ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ 101.PRE ​ Inline XBRL Taxonomy Extension Presentation Linkbase ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ 104 ​ Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101) ​ ​ ​ ​ X * Management contract or compensatory plan ​ 37 ​ Table of Contents 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. ​ ​ ​ ​ ​ RLI Corp. ​ ​ ​ ​ ​ ​ ​ ​ /s/ Todd W. Bryant ​ ​ Todd W. Bryant ​ ​ Chief Financial Officer ​ ​ (Principal Financial and Chief Accounting Officer) ​ ​ ​ Date: October 22, 2025 ​ ​ ​ ​ ​ ​ 38 ​