[Form 4] SEI INVESTMENTS CO Insider Trading Activity

Rhea-AI Filing Summary

Michael Lane, Executive Vice President of SEI Investments Company (SEIC), reported a change in beneficial ownership on a Form 4. The filing shows a transaction dated 09/16/2025 involving Common Stock where 3,935 shares were disposed (D) at a reported price of $86.6, leaving 33,065 shares beneficially owned directly. The filing also reports an indirect interest of 154.5545 shares described as "By ESPP." The Form 4 is signed on behalf of Mr. Lane by Diane Gallagher, attorney in fact, dated 09/17/2025. The disclosure provides the specific quantities, price, and ownership form for the reported transactions.

Positive

• Timely and specific disclosure of insider transaction details (date, quantity, price, resulting holdings)
• Clear reporting of indirect interest (154.5545 shares "By ESPP"), improving transparency
• Authorized signature by attorney in fact indicates proper execution of filing

Negative

• Insider disposed of 3,935 shares, which reduces direct ownership (may be perceived negatively by some investors)

Insights

Securities Analyst

TL;DR: Routine disclosure of an insider sale; quantity, price, and remaining direct holdings are clearly reported.

The Form 4 documents a sale of 3,935 SEIC common shares at $86.6 on 09/16/2025, reducing direct beneficial ownership to 33,065 shares. The filing also lists an indirect holding of 154.5545 shares "By ESPP." This is a standard Section 16 filing that provides transparency on insider activity but contains no operational or financial performance information. For investors, the filing signals compliance and updates on insider ownership levels but does not by itself indicate company-level material events.

Corporate Governance Expert

TL;DR: The filing reflects accurate insider reporting and a delegated signature, consistent with governance and disclosure practices.

The document is a properly completed Form 4 reporting an insider disposition and an indirect ESPP interest. The signature block shows the report was executed by an attorney in fact, Diane Gallagher, on 09/17/2025, which is a common and acceptable execution method when authorized. The filing enhances transparency about executive ownership but does not disclose any governance changes, related-party transactions, or policy deviations.

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).

1. Name and Address of Reporting Person^*

LANE 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)
09/16/2025

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	09/16/2025		F		3,935	D	$86.6	33,065	D
Common Stock								154.5545	I	By ESPP

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

Explanation of Responses:

Remarks:

	/s/ Michael Lane, by Diane Gallagher, attorney in fact	09/17/2025
	** 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 transaction did Michael Lane report on Form 4 for SEIC?

The Form 4 reports a transaction dated 09/16/2025 where 3,935 shares of SEI Investments Company common stock were disposed (D) at a price of $86.6.

How many SEIC shares does Michael Lane beneficially own after the reported transaction?

After the reported transaction, Michael Lane is shown as beneficially owning 33,065 shares directly.

What indirect ownership is reported for Michael Lane in this filing?

The filing reports an indirect interest of 154.5545 shares described as "By ESPP".

Who signed the Form 4 and when was it signed?

The Form 4 is signed /s/ Michael Lane, by Diane Gallagher, attorney in fact and dated 09/17/2025.

Does the Form 4 disclose any derivative transactions for Michael Lane?

No derivative transactions are reported in Table II; the filing contains only non-derivative common stock information.