Watch ATRC. 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 |
|---|---|---|---|---|---|
| 2026-08-14 | 3.9M | +58K | 7.71% | 643K | 6.1 |
| 2026-07-31 | 3.9M | −1M | 7.60% | 1M | 3.7 |
| 2026-07-15 | 4.9M | +415K | 9.56% | 857K | 5.7 |