---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-196414"
form_type: "8-K"
ticker: "SANA"
cik: "0001770121"
company_name: "Sana Biotechnology, Inc."
filed_at: "2025-09-05T23:59:59+00:00"
generated_at: "2026-05-17T07:59:46.207979+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Sana Biotechnology GC Bernard Cassidy to retire Oct 20; Aaron Grossman named successor

## Summary
- Bernard Cassidy will retire as EVP, General Counsel, effective Oct 20, 2025.
- Aaron Grossman appointed EVP, Chief Legal Officer, starting Oct 20, 2025.
- Cassidy's retirement is voluntary for personal reasons; no disagreement with Company.
- Cassidy expected to provide transition services after retirement date.

## SEC filing metadata
- accession: 0001193125-25-196414
- form_type: 8-K
- ticker: SANA
- cik: 0001770121
- company_name: Sana Biotechnology, Inc.
- filed_at: 2025-09-05T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02, 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1770121/000119312525196414/0001193125-25-196414-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1770121/000119312525196414/sana-20250904.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-196414
- JSON: https://secwatch.observer/filing/0001193125-25-196414.json
- Plain text: https://secwatch.observer/filing/0001193125-25-196414.txt

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