Philip McCabe - 04 Dec 2025 Form 4 Insider Report for SEI INVESTMENTS CO (SEIC)

Role: Executive Vice President and Head of SEI's Investment Management Business.
Signature: /s/ Philip McCabe by Diane Gallagher, attorney in fact
Issuer symbol: SEIC
Transactions as of: 04 Dec 2025
Net transactions value: -$333,240
Form type: 4
Filing time: 08 Dec 2025, 16:20:22 UTC
Previous filing: 28 Oct 2025
Next filing: 29 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
McCabe Philip	Executive Vice President and Head of SEI's Investment Management Business.	ONE FREEDOM VALLEY DRIVE, OAKS	/s/ Philip McCabe by Diane Gallagher, attorney in fact	08 Dec 2025	0001964748

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SEIC	Common Stock	Options Exercise	$640,080	+12,000	+19%	$53.34	74,544	04 Dec 2025	Direct
transaction	SEIC	Common Stock	Sale	$973,320	-12,000	-16%	$81.11	62,544	04 Dec 2025	Direct	F1
holding	SEIC	Common Stock						2,442	04 Dec 2025	By Employee Stock Purchase Plan

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	Option to Purchase Common Stock	Options Exercise		-12,000	-100%		0	04 Dec 2025	Common Stock	12,000	$53.34	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 $80.87 to $81.57. 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:

Executive Vice President and Head of SEI's Investment Management Business.