SEI Investments insider exercises options, sells 5,000 shares

SEI Investments Co insider Mark Andrew Warner reported an option exercise and share sale.

Rhea-AI Filing Summary

SEI Investments Co insider Mark Andrew Warner reported an option exercise and share sale. On July 29, 2025 he exercised stock options covering 5,000 shares of common stock at an exercise price of $49.63 per share and sold 5,000 shares at $88.75 per share. After these transactions he holds 1,300 shares of SEI Investments common stock directly.

Insights

Financial Analyst

TL;DR: Officer converted options then sold all exercised shares, cutting direct stake to 1,300; ~90% of exercised stock monetised.

The CAO’s sale represents roughly $445k in proceeds (5,000 × $88.75) and a ~$195k intrinsic gain over the $49.63 strike. Because the officer retained only 1,300 shares, investors may view the move as de-risking personal exposure ahead of option expiry rather than a long-term confidence signal. With no derivatives left, Warner’s future equity alignment is now limited to the residual holding. While the transaction is modest relative to SEI’s $11 bn market cap, insider disposition by a senior accounting executive can weigh on sentiment, especially absent a pre-arranged 10b5-1 plan.

Insider Trade Summary

Exercise and Sale: 5,000 shares ($196K approx. pre-tax spread)

Exercise and Sale 4 txns

Insider Warner Mark Andrew

Role Insider

Sold 5,000 shs ($444K)

Approx. gross sale proceeds $444K

Approx. exercise cost $248K

Approx. pre-tax spread $196K

Type	Security	Shares	Price	Value
Exercise	STOCK OPTION RIGHT TO PURCHASE	2,500	$0.00	$0.00
Exercise	STOCK OPTION RIGHT TO PURCHASE	2,500	$0.00	$0.00
Exercise	Common Stock	5,000	$49.63	$248K
Sale	Common Stock	5,000	$88.75	$444K

Holdings After Transaction: STOCK OPTION RIGHT TO PURCHASE — 0 contracts (Direct); Common Stock — 1,300 shares (Direct)

Footnotes (2)

1. F1. Represents the weighted average of a range of sale prices from $88.61 to $89.24. 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 employment compensation

Key Figures

Options exercised: 5,000 shares Exercise price: $49.6300 per share Shares sold: 5,000 shares +3 more

6 metrics

Options exercised 5,000 shares Stock options converted into common stock on July 29, 2025

Exercise price $49.6300 per share Price paid per share upon exercise of stock options

Shares sold 5,000 shares Common stock sold on July 29, 2025

Sale price $88.7500 per share Reported per-share sale price for common stock

Post-transaction holdings 1,300 shares Direct common stock position after reported transactions

Option expiration date December 13, 2026 Expiration date of stock option rights exercised

Key Terms

STOCK OPTION RIGHT TO PURCHASE, Exercise or conversion of derivative security, weighted average, Common Stock

4 terms

STOCK OPTION RIGHT TO PURCHASE financial

"security_title "STOCK OPTION RIGHT TO PURCHASE" for derivative transactions"

Exercise or conversion of derivative security financial

"transaction_code_description "Exercise or conversion of derivative security""

weighted average financial

"Represents the weighted average of a range of sale prices from $88.61 to $89.24."

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.

Common Stock financial

"underlying_security_title "Common Stock" associated with the options"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did SEIC report for Mark Andrew Warner in this Form 4?

SEI Investments Co reported that insider Mark Andrew Warner exercised stock options for 5,000 shares of common stock at $49.63 per share and sold 5,000 shares at $88.75 per share on July 29, 2025, leaving him with 1,300 shares held directly.

How many SEI Investments (SEIC) shares did Mark Andrew Warner sell?

Mark Andrew Warner sold 5,000 shares of SEI Investments common stock. These shares were sold on July 29, 2025 at a reported price of $88.75 per share, following the exercise of stock options for the same number of shares earlier that day.

At what prices did SEIC insider Mark Andrew Warner transact his shares?

He exercised stock options at an exercise price of $49.63 per share and sold common stock at $88.75 per share. A note explains that one reported price represents a weighted average of sale prices between $88.61 and $89.24.

How many SEI Investments (SEIC) shares does Mark Andrew Warner hold after these trades?

After the reported option exercises and share sale, Mark Andrew Warner holds 1,300 shares of SEI Investments common stock directly. This post-transaction holding figure is explicitly stated as his canonical balance following the July 29, 2025 transactions.

What derivative securities were involved in Mark Andrew Warner’s SEIC transactions?

The transactions involved stock option rights to purchase SEI Investments common stock. On July 29, 2025, options covering 5,000 underlying shares were exercised at an exercise price of $49.63 per share, with an option expiration date of December 13, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 07/30/2025 - 03:26 PM Learn about SEC filing dates

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^*

Warner Mark Andrew

(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
	Officer (give title below)	X	Other (specify below)
			See Remarks

3. Date of Earliest Transaction (Month/Day/Year)
07/29/2025

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	07/29/2025		M		5,000	A	$49.63	6,300	D
Common Stock	07/29/2025		S		5,000	D	$88.75(1)	1,300	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
STOCK OPTION RIGHT TO PURCHASE	$49.63	07/29/2025		M			2,500	12/31/2017	12/13/2026	Common Stock	2,500	(2)	0	D
STOCK OPTION RIGHT TO PURCHASE	$49.63	07/29/2025		M			2,500	12/31/2019	12/13/2026	Common Stock	2,500	(2)	0	D

Explanation of Responses:

1. Represents the weighted average of a range of sale prices from $88.61 to $89.24. 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:

Title: Chief Accounting Officer and Controller

	/s/Mark Andrew Warner, by Diane Gallagher, attorney in fact	07/30/2025
	** 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.