[Form 4] SEI INVESTMENTS CO Insider Trading Activity

Rhea-AI Filing Summary

SEI Investments Company director William Doran reported exercising stock options and acquiring 10,000 shares of SEI common stock at $53.34 per share. After this transaction on 11/17/2025, he beneficially owned 628,536 shares, held directly. The options exercised related to two grants, each covering 5,000 shares, that were granted as compensation for service on the company’s board and were scheduled to expire on 12/08/2025.

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^*

DORAN WILLIAM

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
11/17/2025

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	11/17/2025		M		10,000	A	$53.34	628,536	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
Common Stock (right to purchase)	$53.34	11/17/2025		M			5,000	12/31/2017	12/08/2025	Common Stock	5,000	(1)	0	D
Common Stock (right to purchase)	$53.34	11/17/2025		M			5,000	12/31/2018	12/08/2025	Common Stock	5,000	(1)	0	D

Explanation of Responses:

1. Received as compensation for service on the Company's Board of Directors.

Remarks:

	/s/ William Doran, by Diane Gallagher, attorney in fact	11/18/2025
	** 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 insider transaction did SEI Investments (SEIC) report on this Form 4?

The Form 4 reports that director William Doran exercised stock options and acquired 10,000 shares of SEI Investments common stock at an exercise price of $53.34 per share on 11/17/2025.

How many SEI Investments (SEIC) shares does the reporting person own after the transaction?

Following the reported option exercises, William Doran beneficially owned 628,536 shares of SEI Investments common stock, held directly.

What derivative securities were involved in this SEI Investments (SEIC) Form 4?

The filing shows two grants of stock options, each for 5,000 shares of SEI common stock with an exercise price of $53.34 per share and an expiration date of 12/08/2025.

What transaction code is used in the SEI Investments (SEIC) Form 4 filing?

The transactions are coded M, which indicates the exercise or conversion of derivative securities, in this case stock options converting into SEI Investments common shares.

Why were the SEI Investments (SEIC) stock options originally granted to the director?

The explanation states that the options were received as compensation for William Doran’s service on SEI Investments Company’s Board of Directors.

Are any of the director’s SEI Investments (SEIC) options still outstanding after this Form 4?

For the two reported option positions of 5,000 shares each, the number of derivative securities beneficially owned after the transactions is listed as 0, indicating those specific grants have been fully exercised.