LFST holder plans sale of 13.6M shares

LFST received a Rule 144 notice indicating that Citadel Securities, LLC plans to sell up to 13,643,207 shares of Common Stock, par value $0.01 per share, on the NASDAQGS on or after August 10, 2026.

Rhea-AI Filing Summary

LFST received a Rule 144 notice indicating that Citadel Securities, LLC plans to sell up to 13,643,207 shares of Common Stock, par value $0.01 per share, on the NASDAQGS on or after August 10, 2026. The filing lists an aggregate market value of $147,892,363.88 for these shares, with 382,055,609 shares of Common Stock outstanding. The seller originally acquired 184,902,826 shares from the issuer on June 9, 2021 in a reorganization that preceded the company’s initial public offering, described as a contribution of limited partner interests for shares of Common Stock.

Key Figures

Shares to be sold: 13,643,207 shares Aggregate market value: $147,892,363.88 Shares outstanding: 382,055,609 shares +2 more

5 metrics

Shares to be sold 13,643,207 shares Maximum LFST Common Stock shares covered by Citadel Securities’ Rule 144 filing

Aggregate market value $147,892,363.88 Aggregate market value of the 13,643,207 shares to be sold

Shares outstanding 382,055,609 shares LFST Common Stock outstanding as referenced in the Form 144

Original shares acquired 184,902,826 shares LFST shares originally acquired by Citadel Securities, LLC on June 9, 2021

Planned sale date 08/10/2026 Date on or after which the Rule 144 sales may occur on NASDAQGS

Key Terms

Rule 144, aggregate market value, initial public offering, contribution of limited partner interests

4 terms

Rule 144 regulatory

"received a Rule 144 notice indicating that Citadel Securities, LLC plans to sell"

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.

aggregate market value financial

"The filing lists an aggregate market value of $147,892,363.88 for these shares"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

initial public offering financial

"in a reorganization that preceded its initial public offering"

An initial public offering (IPO) is when a private company first sells its shares to the public and becomes a stock-listed company. It matters because it allows the company to raise money from a wide range of investors, helping it grow, while giving early shareholders a way to sell some of their ownership.

contribution of limited partner interests financial

"Contribution of limited partner interests for shares of Common Stock"

FAQ

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

What stock sale is disclosed for LFST in this Form 144?

Citadel Securities, LLC filed to sell up to 13,643,207 shares of LFST Common Stock under Rule 144. The filing lists an aggregate market value of $147,892,363.88 for these shares, to be sold on NASDAQGS on or after August 10, 2026.

Who is selling LFST shares and on which market?

The seller is Citadel Securities, LLC, which plans to sell LFST Common Stock on the NASDAQGS market. The Form 144 relates to the potential sale of 13,643,207 shares with an aggregate market value of $147,892,363.88.

How many LFST shares are outstanding in this Form 144?

The Form 144 states that 382,055,609 shares of LFST Common Stock are outstanding. This figure provides context for the planned sale of 13,643,207 shares by Citadel Securities, LLC under Rule 144 on or after August 10, 2026.

When were the LFST shares originally acquired by the seller?

The shares were originally acquired on June 9, 2021 in a reorganization preceding LFST’s initial public offering. Citadel Securities, LLC obtained 184,902,826 shares through a contribution of limited partner interests in exchange for Common Stock from the issuer.

Does LFST receive proceeds from this Form 144 stock sale?

The Form 144 describes a potential resale by Citadel Securities, LLC of existing LFST shares acquired in a prior reorganization. It characterizes this as a holder sale under Rule 144, not an issuance by the company, and does not describe proceeds to LFST.

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

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Accepted by SEC EDGAR 08/10/2026 - 04:34 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	0001977613
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	LifeStance Health Group, Inc.
SEC File Number	001-40478
Address of Issuer	4800 N. Scottsdale Road Suite 2500 Scottsdale ARIZONA 85251
Phone	602-767-2100
Name of Person for Whose Account the Securities are To Be Sold	TPG VIII Lynnwood Holdings Aggregation, L.P.
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	Stockholder

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 Stock, par value $0.01 per share	Citadel Securities, LLC 830 Brickell Plaza Miami FL 33131	13643207	147892363.88	382055609	08/10/2026	NASDAQGS

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 Stock, par value $0.01 per share	06/09/2021	The shares of Common Stock reported herein were originally acquired by Seller from Issuer in a reorganization that preceded its initial public offering.	Issuer			184902826	06/09/2021	Contribution of limited partner interests for shares of Common Stock

* 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	Sales by Seller should be aggregated with the sales of shares of Common Stock of the Issuer by Summit Partners Growth Equity Fund IX-A, L.P., Summit Partners Growth Equity Fund IX-B, L.P., Summit Investors GE IX/VC IV, LLC, Summit Partners Entrepreneur Advisors Fund II, L.P. and Summit Investors GE IX/VC IV (UK), L.P. (together with Seller, the "Selling Stockholders"). The Selling Stockholders have filed separate Forms 144 for aggregate sales of 16,489,203 shares of Common Stock of the Issuer during the past three months.
Date of Notice	08/10/2026
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	/s/ Matthew White
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)