SCHEDULE: Summit Partners Amends LifeStance Health Stake
Beneficial Ownership Disclosure
Summit Partners and its affiliated entities have filed an amendment to their Schedule 13G, disclosing a 7.49% beneficial ownership in LifeStance Health Group, Inc.
Summary
- Summit Partners, L.P. and its affiliated entities (Summit Partners Growth Equity Fund IX-A, L.P., Summit Partners Growth Equity Fund IX-B, L.P., Summit Investors GE IX/VC IV (UK), L.P., Summit Partners Entrepreneur Advisors Fund II, L.P., and Summit Investors GE IX/VC IV, LLC) reported beneficial ownership of LifeStance Health Group, Inc.
- The aggregate amount beneficially owned by Summit Partners, L.P. is 29,209,776 shares, representing 7.49% of LifeStance Health Group, Inc.'s common stock.
- Summit Partners Growth Equity Fund IX-A, L.P. beneficially owns 17,886,858 shares, which constitutes 4.59% of the class.
- Summit Partners Growth Equity Fund IX-B, L.P. beneficially owns 11,168,308 shares, representing 2.87% of the class.
- The ownership percentages are calculated based on 389,783,210 shares of common stock outstanding as of February 17, 2026, as reported in the Issuer's Form 10-K filed with the SEC on February 25, 2026.
- The filing is an Amendment No. 3 to a Schedule 13G, indicating an update to previously reported beneficial ownership.
Sentiment
Score: 5
Explanation: StockSavvy.ai views this as a neutral disclosure, representing a routine update to a significant existing institutional stake in LifeStance Health Group, Inc. without indicating a material change in investment thesis.
Future Outlook
NA
Industry Context
StockSavvy.ai notes that significant institutional ownership, such as that held by Summit Partners, often signals investor confidence in the long-term prospects of companies within the healthcare and mental health services sector, which continues to see growing demand.
Stakeholder Impact
- Shareholders: The continued significant stake by Summit Partners may be viewed as a sign of ongoing institutional confidence in LifeStance Health Group, Inc.
Key Dates
| Date | Description |
|---|---|
| 2021-10-25 | Date of Powers of Attorney, incorporated by reference. |
| 2022-02-04 | Date of Joint Filing Agreement and initial Schedule 13G filing, incorporated by reference. |
| 2026-02-17 | Date as of which 389,783,210 shares of common stock were outstanding, as reported in the Issuer's Form 10-K. |
| 2026-02-25 | Date the Issuer's Form 10-K was filed with the SEC. |
| 2026-03-31 | Date of event which requires filing of this statement (beneficial ownership reporting date). |
| 2026-05-08 | Date of filing of this Schedule 13G Amendment No. 3. |
Keywords
LifeStance Health Group, Summit Partners, Schedule 13G, Beneficial Ownership, Institutional Investor, Common Stock, Healthcare, Mental Health Services
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