Mark Andrew Warner - 25 Feb 2026 Form 4 Insider Report for SEI INVESTMENTS CO (SEIC)

Role
Chief Accounting Officer and Controller
Signature
/s/Mark Andrew Warner, by Diane Gallagher, attorney in fact
Issuer symbol
SEIC
Transactions as of
25 Feb 2026
Net transactions value
-$42,480
Form type
4
Filing time
26 Feb 2026, 11:59:35 UTC
Previous filing
29 Dec 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Warner Mark Andrew Chief Accounting Officer and Controller 1 FREEDOM VALLEY DRIVE, OAKS /s/Mark Andrew Warner, by Diane Gallagher, attorney in fact 26 Feb 2026 0001972425

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SEIC Common Stock Award $142,240 +2,000 +217% $71.12 2,921 25 Feb 2026 Direct
transaction SEIC Common Stock Award $142,240 +2,000 +68% $71.12 4,921 25 Feb 2026 Direct
transaction SEIC Common Stock Sale $326,960 -4,000 -81% $81.74 921 25 Feb 2026 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction SEIC STOCK OPTION RIGHT TO PURCHASE Options Exercise -2,000 -100% 0 25 Feb 2026 Common Stock 2,000 $71.12 Direct F2
transaction SEIC STOCK OPTION RIGHT TO PURCHASE Options Exercise -2,000 -100% 0 25 Feb 2026 Common Stock 2,000 $71.12 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents the weighted average of a range of sale prices from $81.67 to $81.80. 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.
F2 Received as employment compensation

Remarks:

Chief Accounting Officer and Controller