C4 Therapeutics Inc is a clinical-stage biopharmaceutical company dedicated to delivering on the promise of targeted protein degradation science to create a new generation of medicines that transforms patient's lives. The Company is progressing targeted oncology programs through clinical studies and leveraging its TORPEDO platform to efficiently design and optimize small-molecule medicines to address difficult-to-treat diseases. The degrader medicines of the company are designed to harness the body's natural protein recycling system to rapidly degrade disease-causing proteins, offering the potential to overcome drug resistance, and drug undruggable targets and improve patient outcomes. Its pipeline is Cemsidomide, CFT8919, and other discovery products.
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Grant or award | 10 | 501,991 | |
| Option exercise | 3 | 17,465 | |
| Tax withholding / forfeiture | 1 | 7,397 |
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
38 Form 4 filings on record, the earliest from Oct 2, 2024, newest first. Filing history page 2 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Andrew Hirsch - Officer | Option exercise | Common Stock | 12,500 | - | - | |
| Andrew Hirsch - Officer | Tax withholding / forfeiture | Common Stock | 5,550 | $6.04 | $34K | |
| Andrew Hirsch - Officer | Option exercise | Performance Restricted Stock Units | 12,500 | $0.00 | - | |
| Jolie Siegel - Officer | Option exercise | Common Stock | 3,750 | - | - | |
| Jolie Siegel - Officer | Tax withholding / forfeiture | Common Stock | 1,102 | $6.04 | $7K | |
| Jolie Siegel - Officer | Option exercise | Performance Restricted Stock Units | 3,750 | $0.00 | - | |
| Kendra Adams - Officer | Option exercise | Common Stock | 3,750 | - | - | |
| Kendra Adams - Officer | Tax withholding / forfeiture | Common Stock | 1,102 | $6.04 | $7K | |
| Kendra Adams - Officer | Option exercise | Performance Restricted Stock Units | 3,750 | $0.00 | - | |
| Kelly Schick - Officer | Option exercise | Common Stock | 3,750 | - | - | |
| Kelly Schick - Officer | Tax withholding / forfeiture | Common Stock | 1,102 | $6.04 | $7K | |
| Kelly Schick - Officer | Option exercise | Performance Restricted Stock Units | 3,750 | $0.00 | - | |
| Scott N. Boyle - Officer | Option exercise | Common Stock | 3,750 | - | - | |
| Scott N. Boyle - Officer | Tax withholding / forfeiture | Common Stock | 1,102 | $6.04 | $7K | |
| Scott N. Boyle - Officer | Option exercise | Performance Restricted Stock Units | 3,750 | $0.00 | - | |
| Paige Mahaney - Officer | Grant or award | Common Stock | 76,800 | $0.00 | - | |
| Paige Mahaney - Officer | Grant or award | Stock Option (Right to Buy) | 345,600 | $0.00 | - | |
| Kenneth Carl Anderson - Director | Grant or award | Common Stock | 2,023 | $5.56 | $11K | |
| Grant or award | Common Stock | 2,474 | $5.56 | $14K |
This is as far as the anonymous view goes. Create a free account for all 38 CCCC filings on record.
A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Mark Mossler | Officer | 4,139 | $18K | View on EDGAR | |
| JAY GELDMACHER | Former REZI CEO | 82,563 | $1.90M | View on EDGAR | |
| Mark Mossler | Officer | 15,000 | $61K | View on EDGAR |
C4 Therapeutics, Inc. (CCCC) had 12 insider filings in the last 90 days, with the most recent on 2026-07-13. The full record for CCCC runs to 38 Form 4 filings, the earliest from 2024-10-02. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
No insider purchases of CCCC were filed in the last 90 days.
No insider sales of CCCC were filed in the last 90 days. 1 sale is on record for this company.
This page tracks CCCC Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
Create a free InsiderAlpha account and press Watch on this page to add CCCC to your watchlist. A free account also opens the full scored daily plan with every past day and 3 months of price history. No card is required. Sign up at https://insideralpha.ai/register.
Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
Real-time Form 4 alerts, AI-scored daily trade ideas and 10b5-1 plan flags.