Key facts
- This page summarizes Mark Andrew Warner's Form 4 filing for SEI INVESTMENTS CO (SEIC).
- 3 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 30 Apr 2026, 11:35.
Mark Andrew Warner - 28 Apr 2026 Form 4 Insider Report for SEI INVESTMENTS CO (SEIC)
- Reporting relationship
- Title: Chief Accounting Officer and Controller
- Issuer ticker
- SEIC
- Reported as of
- 28 Apr 2026
- Net transaction value
- -$364,640
- SEC form
- 4
- Accepted by SEC
- 30 Apr 2026, 11:35:55 UTC
- Prior SEC filing
- 26 Feb 2026
- Next SEC filing
- 30 Jul 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/Mark Andrew Warner, by Diane Gallagher, attorney in fact
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Mark Andrew Warner filed Form 4 for SEI INVESTMENTS CO (SEIC) on 30 Apr 2026.
Change
- Previous filing in this sequence was filed on 26 Feb 2026.
- Current net transaction value: -$364,640.
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 0001972425
Primary reporting owner
Warner Mark Andrew
- Relationship
- Title: Chief Accounting Officer and Controller
- Address
- 1 FREEDOM VALLEY DRIVE, OAKS
- Signature
- /s/Mark Andrew Warner, by Diane Gallagher, attorney in fact
- Signature date
- 30 Apr 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
SEIC
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +4,000
- Change %
- +434%
- Price
- $48.47*
- Shares after
- 4,921
- Date
- 28 Apr 2026
- Ownership
- Direct
SEIC
transaction
Common Stock
Sale
- Transaction value
- $364,640
- Shares
- -4,000
- Change %
- -81%
- Price
- $91.16
- Shares after
- 921
- Date
- 28 Apr 2026
- Ownership
- Direct
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
SEIC
transaction
Derivative
STOCK OPTION RIGHT TO PURCHASE
Options Exercise
- Transaction value
- Shares
- -2,000
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 28 Apr 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 2,000
- Exercise price
- $48.47
- 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
Received as employment compensation
SEC remarks
Title: Chief Accounting Officer and Controller