STOCK TITAN

SEI Investments (SEIC) EVP sells 10K shares after option exercise

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

SEI Investments executive vice president Michael Peterson reported an option exercise paired with a same‑day stock sale. He exercised options to acquire 10,000 shares of common stock at $48.47 per share, then sold 10,000 shares in an open‑market transaction at $90.00 per share.

Following these transactions, Peterson holds 20,148 SEI Investments common shares directly and 362.2978 shares indirectly through an Employee Stock Purchase Plan. The indirect balance reflects the acquisition of 91.5124 shares through the plan since his most recent Form 4 filing.

Positive

  • None.

Negative

  • None.
Insider Peterson Michael
Role EXECUTIVE VICE PRESIDENT
Sold 10,000 shs ($900K)
Type Security Shares Price Value
Exercise Option to Purchase Common Stock 10,000 $0.00 --
Exercise Common Stock 10,000 $48.47 $485K
Sale Common Stock 10,000 $90.00 $900K
holding Common Stock -- -- --
Holdings After Transaction: Option to Purchase Common Stock — 0 shares (Direct, null); Common Stock — 30,148 shares (Direct, null); Common Stock — 362.298 shares (Indirect, By Employee Stock Purchase Plan)
Footnotes (1)
  1. Reflects the acquisition through the Employee Stock Purchase Plan of 91.5124 shares of common stock since the Reporting Person's most recent Form 4 filing. Received as employment compensation
Shares sold 10,000 shares Open-market sale of common stock at $90.00 per share on 2026-04-23
Sale price $90.00 per share Price for 10,000 SEI Investments common shares sold
Options exercised 10,000 shares Option to purchase common stock exercised on 2026-04-23
Exercise price $48.47 per share Exercise price of option to purchase 10,000 SEI shares
Direct holdings after transactions 20,148 shares Common stock directly owned following reported transactions
Indirect ESPP holdings 362.2978 shares Common stock held via Employee Stock Purchase Plan after update
New ESPP shares 91.5124 shares Additional ESPP shares acquired since most recent prior Form 4
Employee Stock Purchase Plan financial
"Reflects the acquisition through the Employee Stock Purchase Plan of 91.5124 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.
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.
derivative security financial
"transaction_code_description": "Exercise or conversion of derivative security""
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
Option to Purchase Common Stock financial
"security_title": "Option to Purchase Common Stock""
SEC Form 4
FORM 4UNITED 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*
Peterson Michael

(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
EXECUTIVE VICE PRESIDENT
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/23/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock04/23/2026M10,000A$48.4730,148D
Common Stock04/23/2026S10,000D$9020,148D
Common Stock362.2978(1)IBy 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Option to Purchase Common Stock$48.4704/23/2026M10,00012/31/202112/11/2028Common Stock10,000(2)0D
Explanation of Responses:
1. Reflects the acquisition through the Employee Stock Purchase Plan of 91.5124 shares of common stock since the Reporting Person's most recent Form 4 filing.
2. Received as employment compensation
Remarks:
/s/ Michael Peterson by Diane Gallagher, attorney-in-fact04/23/2026
** Signature of Reporting PersonDate
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 transactions did SEI (SEIC) executive Michael Peterson report on this Form 4?

Michael Peterson reported exercising options for 10,000 SEI shares and selling 10,000 shares in an open‑market transaction. The filing also updates his indirect holdings from the Employee Stock Purchase Plan, reflecting additional shares accumulated since his prior Form 4.

How many SEI Investments (SEIC) shares did Michael Peterson sell and at what price?

Michael Peterson sold 10,000 shares of SEI Investments common stock at $90.00 per share. The sale was reported as an open‑market or private transaction, and it occurred on the same date as his option exercise transaction.

What option exercise did Michael Peterson disclose for SEI Investments (SEIC)?

Peterson disclosed exercising an option to purchase 10,000 shares of SEI Investments common stock at $48.47 per share. This option exercise converted a derivative position into common stock and was reported with a non‑derivative entry and a corresponding derivative entry reduced to zero.

How many SEI (SEIC) shares does Michael Peterson own after these transactions?

After the reported transactions, Michael Peterson directly owns 20,148 shares of SEI common stock. He also indirectly owns 362.2978 shares through the Employee Stock Purchase Plan, reflecting both prior contributions and recently acquired plan shares.

What is the role of the Employee Stock Purchase Plan in Michael Peterson’s SEI (SEIC) holdings?

The Employee Stock Purchase Plan accounts for Peterson’s indirect ownership of 362.2978 SEI shares. A footnote explains this balance reflects the acquisition of 91.5124 additional shares through the plan since his most recent prior Form 4 filing.

Did Michael Peterson retain any options after this SEI Investments (SEIC) Form 4 filing?

The filing shows an option to purchase 10,000 SEI shares with a $48.47 exercise price now has a post‑transaction balance of zero. This indicates that specific option grant was fully exercised and no remaining shares from that grant are listed.