Key facts
- This page summarizes Mark Andrew Warner's Form 4 filing for SEI INVESTMENTS CO (SEIC).
- 9 reported transactions and 2 derivative rows are listed below.
- Accepted by SEC: 30 Jul 2026, 16:06.
Mark Andrew Warner - 28 Jul 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 Jul 2026
- Net transaction value
- -$1,535,193
- SEC form
- 4
- Accepted by SEC
- 30 Jul 2026, 16:06:51 UTC
- Prior SEC filing
- 30 Apr 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Mark Andrew Warner by Lindsay A. Barci, attorney in fact
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Mark Andrew Warner filed Form 4 for SEI INVESTMENTS CO (SEIC) on 30 Jul 2026.
Change
- Previous filing in this sequence was filed on 30 Apr 2026.
- Current net transaction value: -$1,535,193.
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 Lindsay A. Barci, attorney in fact
- Signature date
- 30 Jul 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
- +2,500
- Change %
- +271%
- Price
- $64.43*
- Shares after
- 3,421
- Date
- 28 Jul 2026
- Ownership
- Direct
SEIC
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +2,500
- Change %
- +73%
- Price
- $64.43*
- Shares after
- 5,921
- Date
- 28 Jul 2026
- Ownership
- Direct
SEIC
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +5,000
- Change %
- +84%
- Price
- $56.54*
- Shares after
- 10,921
- Date
- 28 Jul 2026
- Ownership
- Direct
SEIC
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +5,000
- Change %
- +46%
- Price
- $56.54*
- Shares after
- 15,921
- Date
- 28 Jul 2026
- Ownership
- Direct
SEIC
transaction
Common Stock
Sale
- Transaction value
- $232,542
- Shares
- -2,300
- Change %
- -14%
- Price
- $101.10
- Shares after
- 13,621
- Date
- 28 Jul 2026
- Ownership
- Direct
- Footnotes
- F1
SEIC
transaction
Common Stock
Sale
- Transaction value
- $540,658
- Shares
- -5,300
- Change %
- -39%
- Price
- $102.01
- Shares after
- 8,321
- Date
- 28 Jul 2026
- Ownership
- Direct
- Footnotes
- F2
SEIC
transaction
Common Stock
Sale
- Transaction value
- $761,993
- Shares
- -7,400
- Change %
- -89%
- Price
- $102.97
- Shares after
- 921
- Date
- 28 Jul 2026
- Ownership
- Direct
- Footnotes
- F3
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
SEIC
transaction
Derivative
Option to Purchase Common Stock
Options Exercise
- Transaction value
- Shares
- -2,500
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 28 Jul 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 2,500
- Exercise price
- $64.43
- Footnotes
- F4
SEIC
transaction
Derivative
Option to Purchase Common Stock
Options Exercise
- Transaction value
- Shares
- -5,000
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 28 Jul 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 5,000
- Exercise price
- $56.54
- Footnotes
- F4
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 4 footnotes
Footnote F1
Represents the weighted average of a range of sale prices from $100.45 to $101.37. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price.
Footnote F2
Represents the weighted average of a range of sale prices from $101.57 to $102.41. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price.
Footnote F3
Represents the weighted average of a range of sale prices from $102.60 to $103.23. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price.
Footnote F4
Received as employment compensation.
SEC remarks
Title: Chief Accounting Officer and Controller