SEI officer plans sale of 2,400 shares on NASDAQ

An SEI INVESTMENTS CO officer filed a Rule 144 notice to sell up to 2,400 shares of common stock derived from equity compensation.

Available on EDGAR 09/22/2026 - 04:14 PM EDT Accepted by SEC EDGAR 09/22/2026 - 04:14 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

SEI INVESTMENTS CO (SEIC) is the issuer for a planned sale of common stock disclosed by officer Michael Lane in a notice filed under Rule 144. The filing covers up to 2,400 shares of common stock to be sold through Charles Schwab, with a proposed sale date of September 22, 2026 on NASDAQ.

The shares to be sold relate to a Restricted Stock Lapse dated September 16, 2026 and are identified as Equity Compensation from SEI INVESTMENTS CO.

Key Figures

Shares to be sold: 2,400 shares Reported aggregate value: 246,669.00 Proposed sale date: September 22, 2026 +1 more

4 metrics

Shares to be sold 2,400 shares Common stock covered by the Rule 144 notice

Reported aggregate value 246,669.00 Aggregate value associated with the 2,400 shares in the securities information section

Proposed sale date September 22, 2026 Date listed for the planned NASDAQ sale of common stock

Restricted stock lapse date September 16, 2026 Date of Restricted Stock Lapse generating the equity compensation shares

Key Terms

Rule 144, Restricted Stock Lapse, Equity Compensation

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Lapse financial

"Common | 09/16/2026 | Restricted Stock Lapse | SEI INVESTMENTS CO"

Equity Compensation financial

"09/16/2026 | Equity Compensation"

Equity compensation is pay given to employees, executives or contractors in the form of company ownership—such as stock, stock options or restricted shares—rather than just cash. It matters to investors because it can align workers' incentives with shareholders (like paying someone in slices of the same pie they help grow), but it also increases the number of shares outstanding and company expenses, affecting ownership percentages and earnings per share.

FAQ

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

What does the Form 144 filing reveal about SEIC insider Michael Lane?

The notice states that officer Michael Lane intends to sell up to 2,400 shares of SEI INVESTMENTS CO common stock under Rule 144, with a proposed sale date of September 22, 2026 on NASDAQ.

How many SEIC shares are covered by this Rule 144 notice?

The filing covers 2,400 shares of SEI INVESTMENTS CO common stock for potential sale. These shares are planned to be sold through Charles Schwab & Co., Inc. on NASDAQ.

What is the reported aggregate value of the SEIC shares in this filing?

The securities information section reports an aggregate value of 246,669.00 for the 2,400 shares of SEI INVESTMENTS CO common stock included in the planned Rule 144 sale.

What is the origin of the SEIC shares being sold under Rule 144?

The shares arise from a Restricted Stock Lapse dated September 16, 2026, identified as Equity Compensation from SEI INVESTMENTS CO. The Form 144 links the proposed sale to this compensation event.

On which market are the SEIC shares intended to be sold according to the notice?

The notice identifies NASDAQ as the market for the proposed sale of 2,400 shares of SEI INVESTMENTS CO common stock under Rule 144.

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

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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	0002037087
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	LANE MICHAEL
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	2400	246669.00	120019182	09/22/2026	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	09/16/2026	Restricted Stock Lapse	SEI INVESTMENTS CO			2400	09/16/2026	Equity Compensation

* 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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	09/22/2026
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	MICHAEL LANE
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)