SUMMIT PARTNERS L P - 30 Sep 2025 SCHEDULE 13G/A Report for LifeStance Health Group, Inc Common Stock, par value $0.01 per share (LFST)

Filing Manager
SUMMIT PARTNERS L P
Reporting Manager
Summit Partners, L.P.
Security
LifeStance Health Group, Inc Common Stock, par value $0.01 per share
Symbol
LFST
Shares outstanding
388,917,807 shares
Disclosed Ownership
33,524,715 shares
Ownership
8.6%
Form type
SCHEDULE 13G/A
Filing time
13 Nov 2025, 16:05:02 UTC
Date of event
30 Sep 2025
SEC
View on sec.gov

Reporting Managers (6)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Summit Partners, L.P. 8.6% 33,524,715 0 33,524,715 By: Summit Master Company, LLC / /s/ Adam H. Hennessey, as POA Its: General Partner / Adam H. Hennessey, as Power of Attorney
Summit Partners Growth Equity Fund IX-A, L.P. 5.3% 20,529,149 0 20,529,149 By: Summit Partners GE IX, L.P. / /s/ Adam H. Hennessey, as POA Its: General Partner / Adam H. Hennessey, as Power of Attorney
Summit Partners Growth Equity Fund IX-B, L.P. 3.3% 12,818,117 0 12,818,117 By: Summit Partners GE IX, L.P. / /s/ Adam H. Hennessey, as POA Its: General Partner / Adam H. Hennessey, as Power of Attorney
Summit Investors GE IX/VC IV (UK), L.P. 0.01% 14,991 0 14,991 By: Summit Investors Management, LLC / /s/ Adam H. Hennessey, as POA Its: Manager / Adam H. Hennessey, as Power of Attorney
Summit Partners Entrepreneur Advisors Fund II, L.P. 0.01% 19,157 0 19,157 By: Summit Investors Management, LLC / /s/ Adam H. Hennessey, as POA Its: Manager / Adam H. Hennessey, as Power of Attorney
Summit Investors GE IX/VC IV, LLC 0.04% 143,301 0 143,301 By: Summit Partners Entrepreneur Advisors GP II, LLC / /s/ Adam H. Hennessey, as POA Its: General Partner / Adam H. Hennessey, Power of Attorney