SEI Investments (SEIC) director sells 5,000 shares in open market

Rhea-AI Filing Summary

SEI Investments Company director William Doran reported an open-market sale of 5,000 shares of Common Stock on June 9, 2026 at $90.50 per share. After this transaction, he directly owns 618,802 shares of SEI Investments common stock.

Insider Trade Summary

Net Seller: 5,000 shares ($452,500)

Net Sell 1 txn

Insider DORAN WILLIAM

Role null

Sold 5,000 shs ($453K)

Type	Security	Shares	Price	Value
Sale	Common Stock	5,000	$90.50	$453K

Holdings After Transaction: Common Stock — 618,802 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 5,000 shares Sale price per share: $90.50 per share Shares owned after transaction: 618,802 shares

3 metrics

Shares sold 5,000 shares Open-market sale of Common Stock on June 9, 2026

Sale price per share $90.50 per share Price for the 5,000 shares sold on June 9, 2026

Shares owned after transaction 618,802 shares Direct Common Stock holdings following the sale

Key Terms

Common Stock, open-market sale, non-derivative, Form 4

4 terms

Common Stock financial

"security_title: "Common Stock""

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.

open-market sale financial

"transaction_action: "open-market sale""

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.

non-derivative financial

"transaction_type: "non-derivative""

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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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^*

DORAN WILLIAM

(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)
06/09/2026

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	06/09/2026		S		5,000	D	$90.5	618,802	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

Explanation of Responses:

Remarks:

	/s/ William Doran, by Diane Gallagher, attorney in fact	06/11/2026
	** 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 William Doran?

SEI Investments director William Doran reported selling 5,000 shares of Common Stock. The open-market transaction occurred on June 9, 2026, and was disclosed on a Form 4 insider trading report filed with the SEC.

At what price did William Doran sell SEI Investments (SEIC) shares?

William Doran sold SEI Investments Common Stock at $90.50 per share. This reported price reflects the open-market sale executed on June 9, 2026, according to the Form 4 insider trading disclosure.

How many SEI Investments (SEIC) shares does William Doran hold after the sale?

After the reported sale, William Doran directly holds 618,802 shares of SEI Investments Common Stock. This post-transaction ownership figure is disclosed in the Form 4 as the total shares following the transaction.

Was the SEI Investments (SEIC) insider transaction a buy or a sell?

The insider transaction was a sale of SEI Investments shares. The Form 4 lists transaction code “S” and describes the event as an open-market sale of 5,000 shares of Common Stock by director William Doran.

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

The Form 4 does not report any derivative or option exercises for this transaction. It shows only a non-derivative open-market sale of 5,000 shares, and the derivative position summary is empty in the filing.