[Form 4] SEI INVESTMENTS CO Insider Trading Activity

Rhea-AI Filing Summary

SEI Investments (SEIC) insider transaction: On 11/12/2025, Executive Vice President Michael Peterson exercised an option for 25,000 shares of common stock at $54.34 per share and sold 25,000 shares at a weighted average price of $84.21, with individual sale prices ranging from $84.20 to $84.27.

Following these transactions, he directly beneficially owns 13,500 shares. The option exercised covered 25,000 underlying shares, was granted on 02/23/2022, and was set to expire on 06/18/2029; it was received as employment compensation. No derivative balance remained after the exercise.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Peterson Michael

(Last) (First) (Middle)

1 FREEDOM VALLEY DRIVE

(Street)

OAKS PA 19456

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
SEI INVESTMENTS CO [ SEIC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EXECUTIVE VICE PRESIDENT

3. Date of Earliest Transaction (Month/Day/Year)
11/12/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/12/2025		M		25,000	A	$54.34	38,500	D
Common Stock	11/12/2025		S		25,000	D	$84.21(1)	13,500	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Option to Purchase Common Stock	$54.34	11/12/2025		M			25,000	02/23/2022	06/18/2029	Common Stock	25,000	(2)	0	D

Explanation of Responses:

1. Represents the weighted average of a range of sale prices from $84.20 to $84.27. 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.

2. Received as employment compensation

Remarks:

	/s/ Michael Peterson by Diane Gallagher, attorney-in-fact	11/13/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did SEIC's EVP report on Form 4?

He exercised an option for 25,000 shares at $54.34 and sold 25,000 shares at a weighted average price of $84.21 on 11/12/2025.

What price did Michael Peterson receive for SEIC shares?

The weighted average sale price was $84.21, with individual sales ranging from $84.20 to $84.27.

How many SEIC shares does the insider own after the transactions?

He directly beneficially owns 13,500 shares after the reported transactions.

What were the terms of the exercised SEIC stock option?

It covered 25,000 shares at an exercise price of $54.34, granted on 02/23/2022, expiring on 06/18/2029.

Was the sale executed under a Rule 10b5-1 plan?

The excerpt includes a checkbox reference, but it does not indicate that the Rule 10b5-1 box was checked.

What is the insider’s role at SEI Investments (SEIC)?

Michael Peterson is an Executive Vice President of SEI Investments.