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Kenneth Burdick has served as our Chief Executive Officer and Chairman of our Board of Directors since September 2022. Prior to joining LifeStance, Mr. Burdick served as the Executive Vice President of Markets and Products of Centene Corporation from January 2020 until February 2021. Mr. Burdick served as the Chief Executive Officer of WellCare Health Plans, Inc. from 2015 until January 2020 when the company was acquired by Centene. Mr. Burdick joined WellCare in 2014, serving initially as President, National Health Plans and then as President and Chief Operating Officer. Mr. Burdick served as the President and Chief Executive Officer of Blue Cross and Blue Shield of Minnesota from February 2012 to July 2012. From August 2010 to February 2012, Mr. Burdick served as Chief Executive Officer of the Medicaid and Behavioral Health businesses of Coventry Health Care, Inc. From October 1995 to May 2009, Mr. Burdick held a variety of positions with UnitedHealth Group, Inc., including Chief Executive Officer of UnitedHealthcare from 2006 to 2008 and Chief Executive Officer of Secured Horizons (Medicare division of UnitedHealthcare) from 2008 to 2009. Mr. Burdick currently serves on the Board of Directors of Centene Corporation. He also served on the Board of Directors of Big Brothers Big Sisters of America from 2017 to 2022, including as National Board Chair from July 2018 to June 2022. Mr. Burdick holds a BA in American Studies from Amherst College and a JD from the University of Connecticut School of Law. On February 25, 2025, the Board of Directors announced that Mr. Kenneth A. Burdick is retiring from his position as CEO, effective March 03, 2025. On February 25, 2026, Kenneth Burdick, Executive Chairman of the Board of Directors of the Company announced his planned transition to non-executive Chairman of the Board effective March 16, 2026.

Mr. David P. Bourdon has served as our Chief Executive Officer and a member of our Board of Directors since March 2025. Previously, Mr. Bourdon served as our Chief Financial Officer and Treasurer from November 2022 until March 2025. Prior to joining LifeStance, Mr. Bourdon served as the Chief Financial Officer of Magellan Health, Inc., from September 2020 until November 2022. Mr. Bourdon previously served in multiple roles at Cigna Corporation since 1999, including as Senior Vice President, Chief Financial Officer - Integrated Medical, International Markets and Group Life & Disability of Cigna from December 2018 through September 2020, Chief Financial Officer, Cigna U.S. Commercial Employer Healthcare and Group Life & Disability from June 2017 through December 2018 and as Chief Financial Officer, Cigna International Markets from August 2013 through May 2017. Mr. Bourdon holds a Bachelor of Science from the United States Coast Guard Academy and an MBA from the University of Maryland, Robert H. Smith School of Business.

Mr. Ryan McGroarty as served as our Chief Financial Officer and Treasurer since March 2025. Prior to joining LifeStance, served as the Chief Financial Officer of Help at Home, LLC, the largest U.S. homecare company, since September 2021, where he led finance, accounting, treasury and revenue management functions. Previously, Mr. McGroarty held a variety of positions with The Cigna Group, including Chief Financial Officer, Vice President, Government Business Segment from 2017 to September 2021 and Chief Financial Officer of Cigna HealthSpring from 2014 to 2017. Mr. McGroarty holds a Bachelor of Arts in Finance degree from Michigan State University and an MBA from the University of Rochester.

Mr. Ryan Pardo has served as our Chief Legal Officer and Secretary since 2017. Prior to joining LifeStance, Mr. Pardo served as General Counsel at Liberty Dialysis until its acquisition by Fresenius Medical Care in 2012 when he subsequently served in a mergers and acquisitions and business development capacity for Fresenius. In addition, Mr. Pardo cofounded and served as a director and in an executive capacity overseeing value-based program design, lobbying and analytics in addition to core legal issues at Liberty Health Partners, which merged with Signify Health. Mr. Pardo also served as general counsel for AIM Consulting, a technology consulting company. Previously, he served as Corporate Counsel at Eddie Bauer Holdings, leading the securities law reporting function prior to their going private transaction. Prior to entering the corporate world, Mr. Pardo practiced corporate finance and acquisitions at the law firm Dorsey & Whitney LLP. Mr. Pardo holds an undergraduate degree in Economics from Stanford University and a JD from Harvard Law School.

Ms. Ann Varanakis has served as our Chief People Officer since February 2023. Previously, Ms. Varanakis served as our Senior Vice President, Talent and ESG since 2022. Prior to joining LifeStance, Ms. Varanakis served in various leadership roles at Discover Financial Services from 2012 until 2022, including as Vice President, Enterprise Workforce Management & Operations Analytics from 2014 until 2022. Prior to Discover Financial Services, Ms. Varanakis served in various roles at Pfizer, Inc. from 2002 until 2011. Ms. Varanakis received a Bachelor of Science degree from the University of Utah and a Master of Science degree from Northwestern University.

Mr. Vaughn Paunovich has served as our Chief Technology Officer since June 2025. Prior to joining LifeStance, Mr. Paunovich served as Executive Vice President of Enterprise Platforms at Amwell from June 2022 to June 2025, where he led the product and technology teams in driving digital transformation for clinicians, patients and payor and provider organizations. Previously, Mr. Paunovich held a variety of leadership positions with UnitedHealth Group, including Senior Vice President of OptumLabs, Strategic Partnerships and Emerging Businesses from August 2021 to July 2022 and Chief Information Officer, Optum Health and OptumCare from 2014 to August 2021, where he led technology and innovation initiatives across the provider and patient care ecosystem. Mr. Paunovich holds a Bachelor of Science degree in International Finance from the University at Albany.

Dr. Teresa M. DeLuca, M.D. has served on our Board of Directors since March 2024. Dr. DeLuca served as a Managing Director at Columbia University's NY Life Science Venture Fund from January 2018 until January 2023 and continues to serve as a Faculty Advisor at the university's School of Entrepreneurship. She previously served as Assistant Clinical Professor of Psychiatry at the Icahn School of Medicine at Mount Sinai in New York City from 2014 to 2017 and as the Chief Medical Officer of Magellan Pharmacy Solutions at Magellan Health from 2012 to 2014. Prior to that, she served as SVP of Pharmacy Health Solutions at Humana, VP of Clinical Sales Solutions & National Medical Director at Walgreen Co., and VP of Personalized Medicine, and VP of Medical Policy & Clinical Quality at Medco. Prior to taking on these executive leadership roles, Dr. DeLuca was a Senior Director of Global Product Development Services at PRA International and a Senior Medical Scientist at GlaxoSmithKline. Dr. DeLuca has served as a director of Surgery Partners since September 2016 and Rejuveron since March 2022. Previously, she served as a director of North Bud Farms, Inc. from May 2018 to February 2020 and of 180 LifeSciences from May 2021 until 2023. Dr. DeLuca completed her residency at Jefferson Medical College of Thomas Jefferson University and earned her M.B.A. from Drexel University.

Mr. Safwan Shabab appointed to the Board effective on July 2, 2026.

On July 2, 2026, the Board appointed Thurman Justice, as Director of the Company.

Ms. Lori Goltermann is appointed to the Board effective on July 2, 2026.

Ms. Stephanie Carin Eken has served as our Chief Medical Officer since February 2026. Dr. Eken is a triple board-certified psychiatrist, child and adolescent psychiatrist and pediatrician. Prior to joining LifeStance, Dr. Eken served as the Chief Medical Officer of Acadia Healthcare from March 2024 to February 2026. Previously, Dr. Eken held a variety of positions at Rogers Behavioral Health, including Chief Medical Officer, for 15 years. Dr. Eken holds a Bachelor of Arts in Leadership from the University of Richmond and received her medical degree from the University of Tennessee Health Science Center College of Medicine. Dr. Eken completed her residency training at the University of Kentucky. Dr. Eken also holds an MBA from the University of Tennessee.

On March 10, 2026, LifeStance Health Group, Inc. promoted Lisa Miller, age 52, to serve as the Company's Chief Operating Officer and Principal Operating Officer. Prior to joining LifeStance, Ms. Miller served as Chief Operating Officer and Interim Chief Executive Officer for Invo Healthcare from September 2020 to April 2022, where she was responsible for executing the organization's vision to transform autism treatment. Ms. Miller holds a Master of Science degree in Neuroscience from the University of Medicine and Dentistry of New Jersey and received an MBA from Columbia Business School.

Darren Black has served on our Board of Directors since 2017, and on the board of our predecessor since 2015. Mr. Black is a Managing Director with Summit Partners. Mr. Black joined Summit Partners in 2013 and focuses primarily on the health care and life sciences sector. Mr. Black also serves on the boards of InnovaCare Health, Leon Medical Centers, Paradigm Outcomes, PharmScript, Sound Physicians, VaxCare, Veranex Group Holdings, L.P. and U.S. Renal Care. Prior to Summit, Darren was a Managing Partner with SV Life Sciences, where he focused on health care services, health care information technology and pharmaceutical services. Prior to SV Life Sciences, Darren was Cofounder and President of two companies-ClinCare and PharmaStar. Previously, he was a health care consultant for Accenture. Darren holds an AB in government from Harvard College and an MBA from the Wharton School of the University of Pennsylvania.