SEI Investments (SEIC) officer sells 15,000 shares, retains sizable stake

Rhea-AI Filing Summary

SEI Investments officer Philip McCabe reported selling 15,000 shares of common stock in an open-market transaction. The shares were sold at a weighted average price of $91.82 per share, with individual sale prices ranging from $91.50 to $92.15.

After the sale, McCabe directly holds 54,884.45 shares of SEI Investments common stock. He also indirectly holds 2,738.9939 shares through the company's Employee Stock Purchase Plan, reflecting the acquisition of 297.3305 shares since his most recent prior Form 4 filing.

Insights

Equity compensation and insider-trading analyst

Officer executes notable open-market sale but keeps substantial share stake.

Officer Philip McCabe sold 15,000 shares of SEI Investments common stock in an open-market transaction at a weighted average price of $91.82 per share, with sales occurring between $91.50 and $92.15.

Following the sale, McCabe still directly owns 54,884.45 shares and indirectly holds 2,738.9939 shares via the Employee Stock Purchase Plan. The transaction represents a partial reduction rather than an exit, with no derivative exercises or tax-withholding events disclosed in this filing.

The filing notes an ESPP acquisition of 297.3305 shares since the prior Form 4, showing continued participation in employee share programs. Future company filings may offer additional context on any further trading activity or changes to his overall equity exposure.

Insider Trade Summary

Net Seller: 15,000 shares ($1,377,300)

Net Sell 2 txns

Insider McCabe Philip

Role See Remarks

Sold 15,000 shs ($1.38M)

Type	Security	Shares	Price	Value
Sale	Common Stock	15,000	$91.82	$1.38M
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 54,884.45 shares (Direct, null); Common Stock — 2,738.994 shares (Indirect, By Employee Stock Purchase Plan)

Footnotes (1)

1. Represents the weighted average of a range of sale prices from $91.50 to $92.15. 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. Reflects the acquisition through the Employee Stock Purchase Plan of 297.3305 shares of common stock since the Reporting Person's most recent Form 4 filing.

Key Figures

Shares sold: 15,000 shares Weighted average sale price: $91.82 per share Direct holdings after sale: 54,884.45 shares +3 more

6 metrics

Shares sold 15,000 shares Open-market sale of common stock

Weighted average sale price $91.82 per share Open-market sale between $91.50 and $92.15

Direct holdings after sale 54,884.45 shares Common stock directly held post-transaction

Indirect holdings after ESPP acquisition 2,738.9939 shares Held via Employee Stock Purchase Plan

ESPP shares acquired since prior Form 4 297.3305 shares Acquisition through Employee Stock Purchase Plan

Net share change -15,000 shares Net buy/sell direction reported as net-sell

Key Terms

open-market sale, Employee Stock Purchase Plan, weighted average

3 terms

open-market sale financial

"Sale in open market or private transaction"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Employee Stock Purchase Plan financial

"Reflects the acquisition through the Employee Stock Purchase Plan of 297.3305 shares"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

weighted average financial

"Represents the weighted average of a range of sale prices from $91.50 to $92.15"

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.

Form 4 Insider Transactions: What Each Field Means →

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^*

McCabe Philip

(Last) (First) (Middle)

ONE 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)
	See Remarks

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/23/2026

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	04/23/2026		S		15,000	D	$91.82(1)	54,884.45	D
Common Stock								2,738.9939(2)	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. Represents the weighted average of a range of sale prices from $91.50 to $92.15. 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. Reflects the acquisition through the Employee Stock Purchase Plan of 297.3305 shares of common stock since the Reporting Person's most recent Form 4 filing.

Remarks:

Title: Executive Vice President, Head of SEI's Investment Managers business

	/s/ Philip McCabe by Diane Gallagher, attorney in fact	04/24/2026
	** 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 transaction did SEI Investments (SEIC) report for Philip McCabe?

SEI Investments reported that officer Philip McCabe sold 15,000 shares of common stock in an open-market transaction. The sale occurred at a weighted average price of $91.82 per share, with individual trades between $91.50 and $92.15.

At what price did Philip McCabe sell SEI Investments (SEIC) shares?

Philip McCabe sold 15,000 SEI Investments shares at a weighted average price of $91.82. The filing states that individual sale prices ranged from $91.50 to $92.15, and he will provide detailed trade breakdowns upon request to regulators, the company, or shareholders.

How many SEI Investments (SEIC) shares does Philip McCabe hold after this Form 4?

After the reported sale, Philip McCabe directly holds 54,884.45 SEI Investments common shares. In addition, he indirectly owns 2,738.9939 shares through the company’s Employee Stock Purchase Plan, reflecting both his remaining stake and ongoing participation in equity programs.

Did Philip McCabe acquire any SEI Investments (SEIC) shares through an employee plan?

Yes. The filing notes that McCabe acquired 297.3305 SEI Investments common shares through the Employee Stock Purchase Plan since his most recent Form 4. These purchases contributed to his total indirect holdings of 2,738.9939 shares under the plan.

Was the SEI Investments (SEIC) insider sale part of an open-market transaction?

The filing classifies the 15,000-share disposition by Philip McCabe as an open-market sale. It specifies transaction code “S,” describing the activity as a sale in the open market or a private transaction, with a weighted average sale price of $91.82 per share.

Does the SEI Investments (SEIC) Form 4 show any option exercises or derivative trades?

No derivative transactions are shown in this Form 4. The derivative summary is empty, and the only reported activity is the 15,000-share open-market sale plus updated holdings, along with a footnoted acquisition of 297.3305 shares through the Employee Stock Purchase Plan.