Watch HDRN. 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 | 245K | −83K | 0.34% | 70K | 3.5 |
| 2026-08-14 | 328K | +43K | 0.46% | 74K | 4.4 |
| 2026-07-31 | 285K | +26K | 0.40% | 90K | 3.2 |
| 2026-07-15 | 259K | +125K | 0.36% | 58K | 4.5 |