Watch CLGN. Know when insiders buy.
One email the day a filing lands. Free.
A free account adds a watchlist, alerts when insiders, Congress or short sellers move on your tickers, and a morning brief. Sign up
| Report date | Shares short | Change | % of shares out | Avg daily volume | Days to cover |
|---|---|---|---|---|---|
| 2026-08-31 | 131K | +109K | — | 17.4M | 1.0 |
| 2026-08-14 | 22K | +7K | — | 101K | 1.0 |
| 2026-07-31 | 15K | −1K | — | 21K | 1.0 |
| 2026-07-15 | 16K | −17K | — | 29K | 1.0 |