0001845257 2026-10-14 2026-10-14 false 0001845257 8-K 2026-10-14 LifeStance Health Group, Inc. DE 001-40478 86-1832801 4800 N. Scottsdale Road Suite 2500 Scottsdale AZ 85251 425 279-8500 false false false false Common Stock, par value $0.01 per share LFST NASDAQ false