LifeStance (LFST) COO reports RSU and PSU vesting with 28,212 shares withheld for taxes

Rhea-AI Filing Summary

LifeStance Health Group, Inc. Chief Operating Officer Lisa K. Miller reported equity compensation activity involving restricted stock units and related tax withholding. On March 9, 2026, she acquired 26,836 shares of common stock at a stated price of $0.00 per share in a grant/award tied to vested performance-based restricted stock units previously granted on March 6, 2025.

On the same date, the issuer withheld 14,766 shares of common stock at $6.91 per share to satisfy tax obligations for vested RSUs and separately withheld 13,446 shares at $6.91 per share for tax obligations related to vested PSUs. Footnotes specify these withheld shares reduce the shares issued to Miller and do not constitute any open-market sale. After these transactions, she directly owned 329,201 shares of common stock.

SEC Form 4

FORM 4

UNITED 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

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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^*

Miller Lisa K

(Last) (First) (Middle)

C/O LIFESTANCE HEALTH GROUP, INC.

4800 N. SCOTTSDALE ROAD, SUITE 2500

(Street)

SCOTTSDALE AZ 85251

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
LifeStance Health Group, Inc. [ LFST ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Operating Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/09/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/09/2026		F(1)		14,766	D	$6.91	315,811	D
Common Stock	03/09/2026		A		26,836(2)	A	$0.00	342,647	D
Common Stock	03/09/2026		F(3)		13,446	D	$6.91	329,201	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents the number of shares withheld by the Issuer to satisfy tax withholding obligations in connection with the net settlement of restricted stock units ("RSUs") that vested on March 9, 2026. The shares withheld represent a reduction of shares issued to the Reporting Person upon settlement of vested RSUs and do not constitute any open-market sale.

2. Represents performance-based restricted stock units ("PSUs") previously granted to the Reporting Person on March 6, 2025, which vested on March 9, 2026.

3. Represents the number of shares withheld by the Issuer to satisfy tax withholding obligations in connection with the net settlement of PSUs that vested on March 9, 2026. The shares withheld represent a reduction of shares issued to the Reporting Person upon settlement of vested PSUs and do not constitute any open-market sale.

	By: /s/ Ryan Pardo, Attorney-in-Fact	03/11/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transactions did LifeStance (LFST) COO Lisa K. Miller report?

Lisa K. Miller reported equity compensation activity on March 9, 2026, including vested RSU and PSU awards and related tax withholding. She received 26,836 common shares and had 28,212 shares withheld to cover tax obligations, all as direct holdings, with no open-market sales.

Were Lisa K. Miller’s LifeStance (LFST) Form 4 transactions open-market sales?

No, the Form 4 explicitly states the withheld shares were used to satisfy tax withholding obligations for vested RSUs and PSUs. Footnotes clarify these 28,212 shares represent reductions of shares issued to her and do not constitute any open-market sale of LifeStance stock.

How many LifeStance (LFST) shares did Lisa K. Miller receive and for what reason?

She acquired 26,836 shares of LifeStance common stock at a stated price of $0.00 per share. The filing explains these shares relate to performance-based restricted stock units granted on March 6, 2025 that vested on March 9, 2026, and were settled in company stock.

How many LifeStance (LFST) shares were withheld for Lisa K. Miller’s taxes?

A total of 28,212 shares of LifeStance common stock were withheld to cover tax obligations. This included 14,766 shares tied to vested RSUs and 13,446 shares tied to vested PSUs, both valued at $6.91 per share for withholding purposes as disclosed.

What is Lisa K. Miller’s LifeStance (LFST) share ownership after these transactions?

Following the March 9, 2026 Form 4 transactions, Lisa K. Miller directly owned 329,201 shares of LifeStance common stock. This figure reflects both the newly delivered shares from vested awards and the reductions from shares withheld to satisfy her tax withholding obligations.

What type of awards vested for LifeStance (LFST) COO Lisa K. Miller?

The filing notes that performance-based restricted stock units granted on March 6, 2025 vested on March 9, 2026. It also references restricted stock units and PSUs for which shares were issued to Miller, with some shares withheld by the issuer to satisfy tax withholding obligations.