RLI Corp.

hereof and should not be deemed to be “filed” under the Securities Exchange Act of 1934. 104 ​ Cover Page Interactive Data File (embedded within the Inline XBRL

Financial Statements and Exhibits. (d) Exhibits ​ Exhibit No. ​ ​ ​ Description ​ ​ ​ 99.1 ​ Press Release dated January 21, 2026 . This Exhibit is furnished pu