Senior insider sale
Chief Accounting Officer at C4 THERAPEUTICS, INC. — senior position signals high conviction
$173.2K
43.61K shares
What this filing means
MOSSLER MARK plans to sell 43.61K shares of C4 THERAPEUTICS, INC. valued at approximately $173.2K. Form 144 is a notice of intent to sell restricted or control securities — not a mandatory transaction. This filing provides advance warning of potential selling pressure.
Filed: 8/13/2026ACC: 0001950047-26-008065
Officer· Chief Accounting Officer
Since Feb 2026
43.61K
Shares to sell
$173.2K
Approx. market value
15K
Acquired (3 months)
1
Planned
2 completed
Securities Acquired — Last 3 Months1
Stock Option Exercise
Cash
8/13/2026
15KTotal acquired15K
| Acquisition Date | Type | Amount Acquired | Gift |
|---|---|---|---|
8/13/2026 | Stock Option Exercise Cash | 15K | — |
| Total | 15K | ||
Planned & Completed Dispositions3
Completed
—Completed
Units to sell
19.52K
Market value
$76.7K
8/12/2026
—Completed
Units to sell
9.09K
Market value
$35.5K
5/27/2026
Planned — Approximate Date
NASDAQPlanned
Units to sell
15K
Market value
$61.1K
8/13/2026
Total
Units
43.61K
Value
$173.2K
| Date | Units to Sell | Approx. Market Value | Exchange | Status |
|---|---|---|---|---|
| Completed | ||||
8/12/2026 | 19.52K | $76.7K | — | Completed |
5/27/2026 | 9.09K | $35.5K | — | Completed |
| Planned — Approximate Date | ||||
8/13/2026 | 15K | $61.1K | NASDAQ | Planned |
| Total | 43.61K | $173.2K | ||