SCHEDULE: Summit Partners Adjusts Stake in LifeStance Health

Summit Partners, through various affiliated entities, has updated its beneficial ownership filing for LifeStance Health Group, Inc., reporting a combined 6.10% stake.

Summary

• This filing is an amendment to a Schedule 13G, indicating a change in the beneficial ownership of LifeStance Health Group, Inc. common stock by Summit Partners and its affiliated entities.
• The reporting persons, including Summit Partners, L.P., 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, collectively hold a significant stake.
• As of June 30, 2026, the total beneficial ownership reported is 23,310,115 shares, representing 6.10% of the outstanding common stock.
• This percentage is calculated based on 382,055,609 shares of common stock outstanding as of July 29, 2026, as reported in LifeStance Health's Form 10-Q filed on August 6, 2026.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this filing as neutral, as it primarily reports on changes in beneficial ownership without providing new operational or financial performance data.

Positives

• Summit Partners maintains a substantial investment in LifeStance Health, indicating continued confidence in the company's long-term prospects.
• The filing clearly delineates the ownership structure across multiple Summit Partners entities.

Negatives

• The filing does not provide any new operational or financial performance data for LifeStance Health, limiting insights into the company's current health.
• The specific reasons for the adjustment in beneficial ownership are not detailed in this filing.

Risks

• Changes in beneficial ownership, even if not a sale, can sometimes signal shifts in investor strategy or sentiment, which could indirectly impact market perception.
• The concentration of ownership among a few large entities could influence corporate governance and decision-making processes.

Future Outlook

This filing does not contain forward-looking statements or guidance regarding LifeStance Health's future performance. It solely reports on beneficial ownership.

Management Comments

• The filing includes a certification that, to the best of the reporting persons' knowledge and belief, the information set forth is true, complete, and correct.
• It is noted that the reporting persons disclaim beneficial ownership of securities except to the extent of their pecuniary interest.

Industry Context

StockSavvy.ai notes that Schedule 13G filings are common for institutional investors and investment funds that acquire a significant stake in a public company. This filing reflects a substantial, though not controlling, ownership position by Summit Partners in the healthcare services sector, specifically within behavioral health.

Comparison to Industry Standards

• The filing does not provide performance data to compare against industry standards.
• The ownership percentage of 6.10% by Summit Partners is a significant stake for an institutional investor in the healthcare services sector, but not uncommon for venture capital or private equity firms that have previously invested in a company.

Stakeholder Impact

• Shareholders: The filing confirms a significant institutional investor's stake, which can influence market perception and potentially board composition discussions.
• Management: The continued significant ownership by Summit Partners may imply ongoing engagement or influence on strategic decisions.
• Creditors: A stable or increasing institutional ownership can be viewed positively by creditors as a sign of long-term viability.

Next Steps

• Summit Partners will continue to monitor its investment in LifeStance Health.
• Future amendments to Schedule 13G will be filed if there are further material changes in beneficial ownership.

Key Dates

Keywords

LifeStance Health, Summit Partners, Beneficial Ownership, Schedule 13G, Investment Funds, Equity Stake, SEC Filing