C4 Therapeutics Inc
Ownership
Ownership Structure
Who owns C4 Therapeutics Inc (CCCC)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 76.8% of the shares are freely tradable; institutional investors hold 85.1%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Morgan Stanley - Brokerage Accounts | 7.21 | 8,867,338 | -2.3 | 06/30/2026 |
| RA Capital Management, LLC | 6.50 | 8,000,000 | +0.0 | 06/30/2026 |
| BlackRock Inc | 6.42 | 7,896,718 | +285.5 | 06/30/2026 |
| Lynx1 Capital Management, LP | 5.96 | 7,326,691 | +4.7 | 06/30/2026 |
| Squadron Capital Management LLC | 5.85 | 7,200,000 | +220.0 | 06/30/2026 |
| Bain Capital Life Sciences Investors, LLC | 5.83 | 7,171,910 | +0.0 | 06/30/2026 |
| JPMorgan Chase & Co | 3.86 | 4,747,424 | +47.3 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.59 | 4,417,731 | +14.4 | 06/30/2026 |
| Citadel Advisors Llc | 3.40 | 4,187,580 | +66.8 | 06/30/2026 |
| The Goldman Sachs Group Inc | 2.87 | 3,530,991 | +47.9 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Adams Kendra | Chief Financial Officer | 382,323 | 1,223,434 $ | Sep 18, 2026 | direct |
| Reyno Leonard | Chief Medical Officer | 372,406 | 1,191,699 $ | Jul 10, 2026 | direct |
| Grogan Donna Roy | Director | 79,471 | 254,307 $ | Oct 1, 2026 | direct |
| Anderson Kenneth Carl | Director | 75,612 | 241,958 $ | Oct 1, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 1, 2026 | Anderson Kenneth Carl | Director | Other | 3,662 | 3.14 | 11,499 |
| Oct 1, 2026 | Grogan Donna Roy | Director | Other | 4,618 | 3.14 | 14,501 |
| Sep 18, 2026 | Adams Kendra | Chief Financial Officer | Other | 2,775 | 3.39 | 9,407 |
| Sep 18, 2026 | Adams Kendra | Chief Financial Officer | Other | 6,250 | 0.00 | – |
| Jul 10, 2026 | Reyno Leonard | Chief Medical Officer | Other | 7,397 | 4.06 | 30,032 |
| Jul 10, 2026 | Reyno Leonard | Chief Medical Officer | Other | 15,325 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 3, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.