---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-24-027399"
form_type: "8-K"
ticker: "CCCC"
cik: "0001662579"
company_name: "C4 Therapeutics, Inc."
filed_at: "2024-06-10T23:59:59+00:00"
generated_at: "2026-06-01T05:18:58.249572+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# C4 Therapeutics appoints Ron Cooper as Chairman; Glenn Dubin resigns from board

## Summary
- Ron Cooper appointed Chairman and director effective June 7, 2024, replacing Bruce Downey who remains a board member.
- Director Glenn Dubin resigned effective same date; no disagreements with company.
- Cooper granted stock options for 65,000 shares under 2020 Plan; one-third vests after one year, rest quarterly over two years.
- Cooper brings experience as former CEO of Albireo (acquired by Ipsen) and nearly 30 years at Bristol-Myers Squibb.

## SEC filing metadata
- accession: 0001628280-24-027399
- form_type: 8-K
- ticker: CCCC
- cik: 0001662579
- company_name: C4 Therapeutics, Inc.
- filed_at: 2024-06-10T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1662579/000162828024027399/0001628280-24-027399-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1662579/000162828024027399/cccc-20240610.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-24-027399
- JSON: https://secwatch.observer/filing/0001628280-24-027399.json
- Plain text: https://secwatch.observer/filing/0001628280-24-027399.txt

## Key facts
- Executive change
  Bruce Downey departed as Director at C4 Therapeutics, Inc..
  - Action: resigned as Chair
  - Role: Director
  source text: Bruce Downey resigned as Chair of the Board, but will continue to serve as a member of the Board
  evidence_url: https://www.sec.gov/Archives/edgar/data/1662579/000162828024027399/0001628280-24-027399-index.htm

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