Who holds it, who is betting against it, and where the big money is moving
Net of large-order buying minus selling, in USD. Over this window: +$2.65M (10 inflow days, 10 outflow days).
The five largest holders on file together own 38.8% of shares outstanding.
Reported short interest has risen from 3.75% to 4.27% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).
| Report date | Shares short | % of float | Days to cover |
|---|---|---|---|
| 15 Sep 2026 | 5,144,873 | 4.3% | 6.7 |
| 31 Aug 2026 | 4,478,252 | 3.7% | 6.4 |
| 14 Aug 2026 | 4,380,104 | 3.6% | 5.8 |
| 31 Jul 2026 | 3,870,393 | 3.2% | 3.6 |
| 15 Jul 2026 | 4,040,731 | 3.4% | 4.8 |
| 30 Jun 2026 | 4,485,345 | 3.7% | 3.2 |
No comments yet — be the first to weigh in on UCB.