Key facts
- This page summarizes Aaron P. Diefenthaler's Form 4 filing for RLI CORP (RLI).
- 3 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 26 Nov 2025, 16:15.
Aaron P. Diefenthaler - 25 Nov 2025 Form 4 Insider Report for RLI CORP (RLI)
- Reporting relationship
- TREASURER, CHIEF INVEST. OFF.
- Issuer ticker
- RLI
- Reported as of
- 25 Nov 2025
- Net transaction value
- -$286,061
- SEC form
- 4
- Accepted by SEC
- 26 Nov 2025, 16:15:07 UTC
- Prior SEC filing
- 15 May 2025
- Next SEC filing
- 15 May 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Aaron P. Diefenthaler
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Aaron P. Diefenthaler filed Form 4 for RLI CORP (RLI) on 26 Nov 2025.
Change
- Previous filing in this sequence was filed on 15 May 2025.
- Current net transaction value: -$286,061.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001540227
Primary reporting owner
Diefenthaler Aaron Paul
- Relationship
- TREASURER, CHIEF INVEST. OFF.
- Address
- 9025 N. LINDBERGH DRIVE, PEORIA
- Signature
- /s/ Aaron P. Diefenthaler
- Signature date
- 26 Nov 2025
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
RLI
transaction
Common Stock
Options Exercise
- Transaction value
- $505,260
- Shares
- +18,000
- Change %
- +27%
- Price
- $28.07
- Shares after
- 84,139
- Date
- 25 Nov 2025
- Ownership
- Direct
- Footnotes
- F1, F2
RLI
transaction
Common Stock
Tax liability
- Transaction value
- $791,321
- Shares
- -12,376
- Change %
- -15%
- Price
- $63.94
- Shares after
- 71,763
- Date
- 25 Nov 2025
- Ownership
- Direct
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
RLI
transaction
Derivative
Stock Option
Options Exercise
- Transaction value
- $0
- Shares
- -18,000
- Change %
- -100%
- Price
- $0.000000
- Shares after
- 0
- Date
- 25 Nov 2025
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 18,000
- Exercise price
- $28.07
- Footnotes
- F3, F4, F5
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 5 footnotes
Footnote F1
Adjusted to reflect 2-for-1 stock split on 01/15/25.
Footnote F2
Ownership reflects dividend reinvestment.
Footnote F3
Stock option grant price adjusted to reflect $7.00 extraordinary dividend declared 11-10-2022.
Footnote F4
Stock option grant price and number of stock options adjusted to reflect 2-for-1 stock split on 01/15/25.
Footnote F5
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.