United States securities and exchange commission logo August 14, 2023 David Bourdon Chief Financial Officer and Treasurer LifeStance Health Group, Inc. 4800 N. Scottsdale Road Suite 6000 Scottsdale, Arizona 85251 Re: LifeStance Health Group, Inc. Form 10-K for the Fiscal Year Ended December 31, 2022 Filed March 9, 2023 Form 10-Q for the Quarterly Period Ended June 30, 2023 Filed August 9, 2023 File No. 001-40478 Dear David Bourdon: We have limited our review of your filing to the financial statements and related disclosures and have the following comments. In some of our comments, we may ask you to provide us with information so we may better understand your disclosure. Please respond to these comments within ten business days by providing the requested information or advise us as soon as possible when you will respond. If you do not believe our comments apply to your facts and circumstances, please tell us why in your response. After reviewing your response to these comments, we may have additional comments. Form 10-K for the Fiscal Year Ended December 31, 2022 Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations Results of Operations, Comparison of the Years Ended December 31, 2022 and 2021 (Successor), page 47 1. Please revise future filings to provide greater insight into the underlying drivers for fluctuations in revenue and operating expenses. In that regard, to the extent relevant, for revenue, consider providing a discussion of changes in and the reasons for variations in visit volumes, clinician count, revenue per visit, and payer rate as compared to the prior period as well as the impact of acquisitions of outpatient mental health practices. For operating expenses, consider providing additional analysis of clinician capacity and utilization and its impact on center costs. Reference Item 303(b)(2)(iii) of Regulation S-K. David Bourdon LifeStance Health Group, Inc. August 14, 2023 Page 2 Form 10-Q for the Quarterly Period ended June 30, 2023 Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations Key Metrics and Non-GAAP Financial Measures, page 23 2. We reference the adjustments for "Litigation costs", "strategic initiatives" and "special charges" as reconciling items to Adjusted EBITDA. These adjustments appear to include adjustments related to normal, recurring, operating expenses. Please provide us with a breakdown of each major category of expense included in these line items, whether these expenses were paid in cash, and why you believe the items are not related to your ongoing operations. Further, explain why you believe these adjustments comply with Question 100.01 of the Compliance and Disclosure Interpretations on Non-GAAP Financial Measures. In closing, we remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. You may Kristin Lochhead at 202-551-3664 or Brian Cascio, Accounting Branch Chief, at 202-551-3676 with any questions. Sincerely, FirstName LastNameDavid Bourdon Division of Corporation Finance Comapany NameLifeStance Health Group, Inc. Office of Industrial Applications and August 14, 2023 Page 2 Services FirstName LastName