SEI Investments (SEIC) CFO logs tax share withholding and ESPP gain

Rhea-AI Filing Summary

SEI Investments Executive VP, CFO and COO Sean Denham reported routine share movements tied to compensation and tax obligations. On March 18, 2026, 7,673 shares of common stock were disposed of at $78.77 per share to cover tax liabilities, not as an open-market sale.

A footnote explains that 284.5759 shares were acquired through the Employee Stock Purchase Plan since the most recent prior Form 4. After these updates, Denham directly holds 57,758 shares and indirectly holds 606.6163 shares through the Employee Stock Purchase Plan, indicating these are largely administrative, compensation-related entries rather than discretionary trading.

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
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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^*

Denham Sean

(Last) (First) (Middle)

1 FREEDOM VALLEY DRIVE

(Street)

OAKS PENNSYLVANIA 19456

(City) (State) (Zip)

UNITED STATES

(Country)

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 VP, CFO, COO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/18/2026

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

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

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

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	03/18/2026		F		7,673	D	$78.77	57,758	D
Common Stock								606.6163(1)	I	By Employee Stock Purchase Plan

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:

1. Reflects the acquisition through the Employee Stock Purchase Plan of 284.5759 shares of common stock since the Issuer's most recent Form 4 filing.

Remarks:

	/s/ Sean Denham, by Diane Gallagher, attorney in fact	03/19/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did SEI Investments (SEIC) report for Sean Denham?

SEI Investments reported that Executive VP, CFO and COO Sean Denham had 7,673 shares withheld to cover tax liabilities and acquired 284.5759 shares through the Employee Stock Purchase Plan. These are compensation-related adjustments, not discretionary open‑market trades.

Did SEI Investments (SEIC) CFO Sean Denham sell shares on the open market?

The filing shows no open‑market sale by Sean Denham. Instead, 7,673 shares were disposed of to satisfy tax obligations, a common non‑market mechanism, while additional shares were acquired through the Employee Stock Purchase Plan since the prior Form 4.

How many SEI Investments (SEIC) shares does Sean Denham hold after this Form 4?

After these transactions, Sean Denham directly holds 57,758 shares of SEI Investments common stock and indirectly holds 606.6163 shares through the Employee Stock Purchase Plan. These figures reflect his updated ownership position reported in the latest Form 4 filing.

What is the significance of the 7,673 SEI Investments (SEIC) shares at $78.77?

The 7,673 shares at $78.77 per share were used to cover tax liabilities related to equity compensation. This tax‑withholding disposition is classified under code F and does not represent a discretionary buy or sell decision in the open market.

What does the Employee Stock Purchase Plan activity mean for SEI Investments (SEIC) CFO?

The footnote states that 284.5759 shares were acquired through the Employee Stock Purchase Plan since the last Form 4. This indicates ongoing participation in a company benefit program, adding to Denham’s indirect holdings without signaling an active trading decision.