SEI Investments insider plans sale of 4,000 shares

SEI Investments Co. reported the planned sale of 4,000 shares of Common Stock under a broker-facilitated, cashless employee stock option exercise.

Rhea-AI Filing Summary

SEI Investments Co. reported the planned sale of 4,000 shares of Common Stock under a broker-facilitated, cashless employee stock option exercise.

The filing lists the proposed sale date as 04/28/2026 and notes a prior sale of 4,000 shares on 02/25/2026 for $326,964.00.

Insights

Insider Transactions Analyst

Routine Rule 144 notice for an employee stock-option cashless exercise; transaction appears administrative.

The filing lists an employee stock option exercise resulting in a broker payment for a cashless exercise of 4,000 shares with a proposed sale date of 04/28/2026. This is consistent with typical option-exercise liquidity by insiders or option holders.

Cash-flow treatment is shown as a broker payment for cashless exercise; subsequent disclosures or trade reports will show actual market trades. Material impact on company equity is not evident from the numbers disclosed.

Key Figures

Shares to be sold: 4,000 shares Prior shares sold: 4,000 shares Reported value of prior sale: $326,964.00 +2 more

5 metrics

Shares to be sold 4,000 shares proposed sale via cashless exercise on 04/28/2026

Prior shares sold 4,000 shares sale reported on 02/25/2026 in "Securities Sold During The Past 3 Months"

Reported value of prior sale $326,964.00 value listed for the 02/25/2026 sale

Form type Form 144 notice of proposed sale under Rule 144

Filing date for proposed sale 04/28/2026 proposed broker-facilitated cashless exercise sale date

Key Terms

Form 144, cashless exercise, Employee Stock Option Exercise

3 terms

Form 144 regulatory

"Securities Sold During The Past 3 Months"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

cashless exercise financial

"Broker Payment for Cashless Exercise"

A cashless exercise is a way for an option holder to convert stock options into actual shares without paying the purchase price in cash; instead they immediately give up a portion of the newly issued shares to cover the cost and any withholding taxes. Investors care because this process increases the number of shares available and can slightly dilute existing holdings, while also signaling how insiders or employees are realizing compensation without needing cash — similar to paying for a purchase by handing over part of what you just bought.

Employee Stock Option Exercise financial

"Employee Stock Option Exercise | SEI INVESTMENTS CO"

FAQ

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

What did SEIC disclose in this Form 144 filing?

The filing states a planned sale of 4,000 shares via a cashless employee option exercise. It lists the proposed sale date as 04/28/2026 and references a prior sale of 4,000 shares on 02/25/2026.

Who is the reporting person in the SEIC Form 144?

The Form 144 identifies Mark Andrew Warner as the reporting person associated with the sale. The form shows his address and links the transaction to SEI Investments Co. as the issuer.

How many shares and what value were sold earlier this year according to the filing?

The filing shows a prior sale of 4,000 shares on 02/25/2026 with a reported value of $326,964.00. That prior sale is listed in the "Securities Sold During The Past 3 Months" section.

What does 'broker payment for cashless exercise' mean in the SEIC notice?

It indicates the broker facilitated an employee stock option exercise by withholding some shares to cover exercise costs and taxes. The filing describes the method as a broker payment for cashless exercise rather than an open-market cash purchase.

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

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Accepted by SEC EDGAR 04/28/2026 - 04:37 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001972425
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	SEI INVESTMENTS CO
SEC File Number	000-10200
Address of Issuer	1 FREEDOM VALLEY DRIVE OAKS PENNSYLVANIA 19456-1100
Phone	6106761000
Name of Person for Whose Account the Securities are To Be Sold	Warner Mark Andrew
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Charles Schwab & Co., Inc. 3000 Schwab Way Westlake TX 76262	4000	364640.00	120272976	04/28/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	04/28/2026	Employee Stock Option Exercise	SEI INVESTMENTS CO			4000	04/28/2026	Broker Payment for Cashless Exercise

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Mark Andrew Warner 1 FREEDOM VALLEY DRIVE OAKS PA 19456-1100	SEI INVESTMENTS CO	02/25/2026	4000	326964.00

144: Remarks and Signature

Remarks
Date of Notice	04/28/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Mark Andrew Warner
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)