SEI Investments Co (SEIC) director sells 10,000 shares after option exercise

Rhea-AI Filing Summary

SEI Investments Co director Carl Guarino reported exercising stock options covering 10,000 shares of Common Stock at an exercise price of $49.630 per share on July 28, 2026. The options, received as compensation for Board service, were followed by the sale of 10,000 shares of Common Stock at a weighted average price of $103.195 per share, within a range of $102.95 to $103.39, in open-market or private transactions.

Insider Trade Summary

Exercise and Sale: 10,000 shares ($536K approx. pre-tax spread)

Exercise and Sale 5 txns

Insider GUARINO CARL

Role Director

Sold 10,000 shs ($1.03M)

Approx. gross sale proceeds $1.03M

Approx. exercise cost $496K

Approx. pre-tax spread $536K

Type	Security	Shares	Price	Value
Exercise	Option to Purchase Common Stock F2	5,000	--	--
Exercise	Option to Purchase Common Stock F2	5,000	--	--
Exercise	Common Stock	5,000	$49.63	$248K
Exercise	Common Stock	5,000	$49.63	$248K
Sale	Common Stock F1	10,000	$103.195	$1.03M

Holdings After Transaction: Option to Purchase Common Stock — 0 shares (Direct); Common Stock — 18,308 shares (Direct)

Footnotes (2)

1. F1. Represents the weighted average of a range of sale prices from $102.95 to $103.39. 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. F2. Received as compensation for service on the Company's Board of Directors.

Key Figures

Shares sold: 10,000 shares Sale price: $103.1950 per share Options exercised: 10,000 shares +2 more

5 metrics

Shares sold 10,000 shares Common Stock sale reported on 2026-07-28

Sale price $103.1950 per share Weighted average sale price; range $102.95 to $103.39

Options exercised 10,000 shares Options to Purchase Common Stock exercised on 2026-07-28

Exercise price $49.6300 per share Exercise price for options received as Board compensation

Option expiration date 2026-12-13 Expiration date of the exercised stock options

Key Terms

Option to Purchase Common Stock, Exercise or conversion of derivative security, weighted average, Sale in open market or private transaction

4 terms

Option to Purchase Common Stock financial

"Security title reported as Option to Purchase Common Stock for derivative entries."

Exercise or conversion of derivative security financial

"Transaction code M is described as Exercise or conversion of derivative security."

weighted average financial

"Represents the weighted average of a range of sale prices from $102.95 to $103.39."

A weighted average is a way of calculating an overall number when some items matter more than others by giving each item a different level of importance, or weight. Investors use weighted averages to combine figures like prices, returns or earnings so the result reflects the size or significance of each part — like grading a class where a final exam counts more than a quiz, producing a score that better represents true performance.

Sale in open market or private transaction financial

"Transaction code S is described as Sale in open market or private transaction."

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/30/2026 - 04:06 PM Accepted by SEC EDGAR 07/30/2026 - 04:05 PM Learn about SEC filing dates

FAQ

What insider transaction did Carl Guarino report for SEI Investments (SEIC)?

Carl Guarino reported exercising options for 10,000 SEI Investments shares at $49.630 per share and then selling 10,000 Common Stock shares at a weighted average price of $103.195 per share on July 28, 2026.

How many SEI Investments (SEIC) shares did Carl Guarino sell and at what price?

Carl Guarino sold 10,000 shares of SEI Investments Common Stock at a weighted average price of $103.195 per share. A footnote states the sale prices ranged from $102.95 to $103.39 across the executed trades.

What stock options did Carl Guarino exercise at SEI Investments (SEIC)?

He exercised options to purchase 10,000 shares of SEI Investments Common Stock at an exercise price of $49.630 per share. These options, expiring December 13, 2026, were reported as having been received as compensation for service on the company’s Board of Directors.

Were Carl Guarino’s SEI Investments (SEIC) option awards related to board service?

Yes. A footnote explains the options were received as compensation for service on SEI Investments’ Board of Directors. The reported exercises on July 28, 2026 therefore reflect the use of equity-based director compensation rather than open-market option purchases.

Are Carl Guarino’s SEI Investments (SEIC) trades reported as under a Rule 10b5-1 plan?

The Form 4’s Rule 10b5-1 checkbox is not marked as plan-based, and the footnotes do not mention any trading plan. Accordingly, these transactions are not reported as executed under a Rule 10b5-1 trading plan in this disclosure.

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^*

GUARINO CARL

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/28/2026

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	07/28/2026		M		5,000	A	$49.63	23,308	D
Common Stock	07/28/2026		M		5,000	A	$49.63	28,308	D
Common Stock	07/28/2026		S		10,000	D	$103.195(1)	18,308	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	$49.63	07/28/2026		M			5,000	12/13/2017	12/13/2026	Common Stock	5,000	(2)	0	D
Option to Purchase Common Stock	$49.63	07/28/2026		M			5,000	12/13/2019	12/13/2026	Common Stock	5,000	(2)	0	D

Explanation of Responses:

1. Represents the weighted average of a range of sale prices from $102.95 to $103.39. 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 compensation for service on the Company's Board of Directors.

	/s/ Carl Guarino by Lindsay A. Barci, attorney in fact	07/30/2026
	** 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)