---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-186460"
form_type: "8-K"
ticker: "LFST"
cik: "0001845257"
company_name: "LifeStance Health Group, Inc."
filed_at: "2025-08-22T23:59:59+00:00"
generated_at: "2026-05-17T10:38:14.651902+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# LifeStance board member William Miller resigns; Sarah Personette appointed

## Summary
- William Miller resigned from the Board and all committees effective Aug 19, 2025, with no disagreement.
- Sarah Personette appointed as director effective Aug 20, 2025.
- Personette receives initial award of 74,766 RSUs vesting over time and performance, subject to continued service.

## SEC filing metadata
- accession: 0001193125-25-186460
- form_type: 8-K
- ticker: LFST
- cik: 0001845257
- company_name: LifeStance Health Group, Inc.
- filed_at: 2025-08-22T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1845257/000119312525186460/0001193125-25-186460-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1845257/000119312525186460/d863673d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-186460
- JSON: https://secwatch.observer/filing/0001193125-25-186460.json
- Plain text: https://secwatch.observer/filing/0001193125-25-186460.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.