Aaron P. Diefenthaler - 14 May 2026 Form 4 Insider Report for RLI CORP (RLI)

Reporting relationship: CHIEF FINANCIAL OFFICER
Issuer ticker: RLI
Reported as of: 14 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 15 May 2026, 16:15:30 UTC
Prior SEC filing: 26 Nov 2025
Source filing: View source filing
Reporting owner signature: /s/ Aaron P. Diefenthaler

Key filing fact

Aaron P. Diefenthaler filed Form 4 for RLI CORP (RLI) on 15 May 2026.

Key facts

This page summarizes Aaron P. Diefenthaler's Form 4 filing for RLI CORP (RLI).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 15 May 2026, 16:15.

Change

Previous filing in this sequence was filed on 26 Nov 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001540227 Primary reporting owner

Diefenthaler Aaron Paul

Relationship: CHIEF FINANCIAL OFFICER
Address: 9025 N. LINDBERGH DRIVE, PEORIA
Signature: /s/ Aaron P. Diefenthaler
Signature date: 15 May 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

RLI transaction Derivative

Stock Option

Award

Transaction value
Shares: +40,000
Change %
Price: $0.000000^*
Shares after: 40,000
Date: 14 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 40,000
Exercise price: $49.88
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Pursuant to option schedule wherein 20% of the aggregate number of shares granted may be exercised commencing one year from grant date and each year thereafter in 20% increments.