STOCK TITAN

SEI EVP sells 37,500 shares at $111.51

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

For SEI INVESTMENTS CO (SEIC), Executive Vice President Michael Peterson exercised options for 37,500 shares of common stock at an exercise price of $56.54 per share and on the same date sold 37,500 shares at a weighted average price of $111.51 per share, within a range of $111.19–$112.07. The exercised options, received as employment compensation, were fully exercised, leaving 0 options reported, and Peterson now holds 454 shares indirectly through the Employee Stock Purchase Plan.

Positive

  • None.

Negative

  • None.
Insider Peterson Michael
Role Executive Vice President
Sold 37,500 shs ($4.18M)
Approx. gross sale proceeds $4.18M
Approx. exercise cost $2.12M
Approx. pre-tax spread $2.06M
Type Security Shares Price Value
Exercise Option to Purchase Common Stock F3 37,500 -- --
Exercise Common Stock 37,500 $56.54 $2.12M
Sale Common Stock F1 37,500 $111.51 $4.18M
holding Common Stock F2 -- -- --
Holdings After Transaction: Option to Purchase Common Stock — 0 contracts (Direct); Common Stock — 20,148 shares (Direct); Common Stock — 454 shares (Indirect, By Employee Stock Purchase Plan)
Footnotes (3)
  1. F1. Represents the weighted average of a range of sale prices from $111.19 to $112.07. 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. Reflects the addition of approximately 91 shares purchased by the Reporting Person through the Company's Employee Stock Purchase Plan.
  3. F3. Received as employment compensation.
Options exercised 37,500 shares of common stock Shares acquired on exercise of option to purchase common stock on 2026-08-28
Option exercise price $56.54 per share Conversion or exercise price for the option to purchase 37,500 shares
Shares sold 37,500 shares of common stock Shares sold on 2026-08-28 in open market or private transactions
Weighted average sale price $111.51 per share Weighted average of sale prices ranging from $111.19 to $112.07
Sale price range $111.19–$112.07 per share Range of prices for the reported 37,500-share sale
Indirect holdings after transaction 454 shares of common stock Held indirectly by Employee Stock Purchase Plan after addition of approximately 91 shares
Option expiration date December 8, 2030 Expiration date of the exercised option to purchase 37,500 shares
weighted average financial
"Represents the weighted average of a range of sale prices from $111.19"
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.
Employee Stock Purchase Plan financial
"purchased by the Reporting Person through the Company's Employee Stock Purchase Plan"
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.
derivative security financial
"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.
indirect ownership financial
"total_shares_following_transaction 454.0000, ownership_type indirect"

FAQ

What did SEIC Executive Vice President Michael Peterson report in this Form 4?

He exercised options for 37,500 shares of SEIC common stock at $56.54 per share and sold 37,500 shares on the same date at a weighted average price of $111.51 per share, with trades between $111.19 and $112.07.

How many SEIC shares did Michael Peterson sell and at what price range?

He sold 37,500 shares of SEIC common stock at a weighted average price of $111.51 per share, with individual sale prices ranging from $111.19 to $112.07, according to the Form 4 footnote.

What options did Michael Peterson exercise in SEIC stock?

He exercised an option to purchase 37,500 shares of SEIC common stock at an exercise price of $56.54 per share. The option was reported as having an expiration date of December 8, 2030 and was received as employment compensation.

How many SEIC shares does Michael Peterson hold after these transactions?

After the reported transactions, Peterson holds 454 shares of SEIC common stock indirectly through the Company’s Employee Stock Purchase Plan, which includes an addition of approximately 91 shares purchased through the plan.

Were Michael Peterson’s SEIC trades made under a Rule 10b5-1 trading plan?

The Form 4’s Rule 10b5-1 checkbox is not checked (false), and the footnotes do not state that the transactions were made pursuant to a Rule 10b5-1 trading plan.

Did Michael Peterson retain any of the SEIC shares acquired through the option exercise?

The Form 4 shows he acquired 37,500 shares via option exercise and sold 37,500 shares the same day. It does not report any directly held post-transaction shares from this exercise, only 454 shares held indirectly via the Employee Stock Purchase Plan.

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

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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)
08/28/2026
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 Stock08/28/2026M37,500A$56.5457,648D
Common Stock08/28/2026S37,500D$111.51(1)20,148D
Common Stock454(2)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$56.5408/28/2026M37,50012/31/202412/08/2030Common Stock37,500(3)0D
Explanation of Responses:
1. Represents the weighted average of a range of sale prices from $111.19 to $112.07. 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 addition of approximately 91 shares purchased by the Reporting Person through the Company's Employee Stock Purchase Plan.
3. Received as employment compensation.
/s/ Michael Peterson by Lindsay A. Barci, attorney in fact09/01/2026
** 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)