---
schema_version: "secwatch.filing_event.v1"
accession: "0001558370-23-000130"
form_type: "8-K"
ticker: "EDIT"
cik: "0001650664"
company_name: "Editas Medicine, Inc."
filed_at: "2023-01-09T23:59:59+00:00"
generated_at: "2026-06-20T17:54:54.647732+00:00"
event_type: "leadership"
sentiment: "negative"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Editas CSO Mark Shearman to step down effective March 31, 2023

## Summary
- Dr. Shearman departs as CSO and EVP; effective March 31, 2023.
- Separation agreement: 12 months base salary, COBRA, and 2022 bonus.
- Agreement includes standard non-disparagement and confidentiality clauses.
- No successor named; CEO Gilmore O'Neill signed the filing.

## SEC filing metadata
- accession: 0001558370-23-000130
- form_type: 8-K
- ticker: EDIT
- cik: 0001650664
- company_name: Editas Medicine, Inc.
- filed_at: 2023-01-09T23:59:59+00:00
- event_type: leadership
- sentiment: negative
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1650664/000155837023000130/0001558370-23-000130-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1650664/000155837023000130/edit-20230107x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001558370-23-000130
- JSON: https://secwatch.observer/filing/0001558370-23-000130.json
- Plain text: https://secwatch.observer/filing/0001558370-23-000130.txt

## Key facts
- Executive change
  Mark S. Shearman departed as Chief Scientific Officer at Editas Medicine, Inc..
  - Action: stepped down
  - Role: Chief Scientific Officer
  source text: On January 7, 2023, Editas Medicine, Inc. (the “Company”) and Mark S. Shearman, Ph.D., Executive Vice President and Chief Scientific Officer of the Company, agreed that Dr. Shearman will step down as Chief Scientific Officer effective March 31, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1650664/000155837023000130/0001558370-23-000130-index.htm

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