[Form 4] SEI Investments Co Insider Trading Activity

Rhea-AI Filing Summary

SEI Investments Co. executive Michael Peterson reported matched transactions on 08/07/2025 that reduced and reallocated his stake in SEIC. He sold 7,089 shares at a weighted average price of $88.55 (disclosed range $88.50–$88.70) and, on the same date, was credited with an equity award tied to 7,089 shares at a reported price/conversion of $61.81.

The derivative entry shows an option to purchase 7,089 shares exercisable from 12/31/2024 and expiring 12/05/2032, with the form stating the award was received as employment compensation. After these transactions his reported beneficial ownership is 13,500 shares, down from 20,589 shares prior to the sale.

Positive

• Equity award disclosed: The Form 4 shows receipt of a 7,089-share equity award recorded as employment compensation, explicitly disclosed in the filing.

Negative

• Insider sale: Michael Peterson sold 7,089 shares at a weighted average price of $88.55, which reduced his reported beneficial ownership to 13,500 shares.

Insights

Financial Analyst

TL;DR: Insider sale offset by a contemporaneous equity award; net reported holding fell to 13,500 shares.

The Form 4 discloses a sale of 7,089 shares at a weighted average of $88.55 and a contemporaneous equity award or option tied to 7,089 shares with a reported price of $61.81. The option is listed as exercisable from 12/31/2024 and expiring 12/05/2032. The reported beneficial ownership decreased from 20,589 to 13,500 shares following these entries. These items are routine for executive compensation and liquidity transactions; the disclosure includes the sale price range and award terms, which aids investor transparency.

Corporate Governance Expert

TL;DR: Form 4 shows a sale and a matching grant recorded as employment compensation; disclosure appears complete and explicit.

The filing records a code S sale of 7,089 shares and a code M acquisition/award of 7,089 shares, with the explanatory note stating the award was received as employment compensation. The Form supplies the weighted average sale price range and the option exercise and expiration dates, providing clear documentation of the transactions. From a governance perspective, the report documents both liquidity and compensation events without additional qualifiers.

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)
08/07/2025

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	08/07/2025		M		7,089	A	$61.81	20,589	D
Common Stock	08/07/2025		S		7,089	D	$88.55(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	$61.81	08/07/2025		M			7,089	12/31/2024	12/05/2032	Common Stock	7,089	(2)	0	D

Explanation of Responses:

1. Represents the weighted average of a range of sale prices from $88.50 to $88.70. 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	08/08/2025
	** 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 transactions did Michael Peterson report on the Form 4 for SEIC?

He sold 7,089 shares at a weighted average price of $88.55 and was credited with an equity award/option tied to 7,089 shares at $61.81 on 08/07/2025.

How many SEIC shares does Michael Peterson beneficially own after the reported transactions?

The Form 4 reports he beneficially owns 13,500 shares following the transactions.

What sale price and range were disclosed for the shares sold?

The weighted average sale price was $88.55, representing a disclosed range of $88.50 to $88.70.

What are the key terms of the equity award or option disclosed?

The filing shows an option to purchase 7,089 shares with a conversion/exercise price of $61.81, exercisable from 12/31/2024 and expiring on 12/05/2032; the award is noted as received as employment compensation.

Did the Form 4 explain the sale pricing detail?

Yes. The filing explains the reported weighted average sale price of $88.55 represents a weighted average of a range from $88.50 to $88.70.

Who signed or filed the Form 4 on behalf of Michael Peterson?

The Form 4 was submitted with a signature indicating Diane Gallagher, attorney-in-fact executed the filing on behalf of Michael Peterson.