Upstream Bio Inc. (UPB)
NASDAQ: UPB
· Real-Time Price · USD
18.63
0.04 (0.22%)
At close: Oct 03, 2025, 3:59 PM
18.50
-0.70%
After-hours: Oct 03, 2025, 07:07 PM EDT
Upstream Bio Short Interest
Upstream Bio has a total short interest of 3.01M. Its short interest has decreased by -2.79% to the previous month.
Short Interest
3.01M
Short Prior Month
3.1M
% Change MoM
-2.79%
Short % Floating
10.09%
Short % Outstanding
5.59%
Days to Cover
4.54
Short Interest Chart
History
| Date | Short Interest | Short Prior Month | % Change | Day to Cover | Short % Float | Short % Out |
|---|---|---|---|---|---|---|
| Sep 24, 2025 | 3.01M | 3.1M | -2.79% | 4.54 | 10.09% | 5.59% |
| Sep 10, 2025 | 3.1M | 3.16M | -1.97% | 8.78 | 10.38% | 5.75% |
| Aug 26, 2025 | 3.16M | 3.08M | 2.57% | 6.43 | 10.59% | 5.86% |
| Aug 11, 2025 | 3.08M | 3.78M | -18.52% | 5.75 | 10.32% | 5.71% |
| Jul 24, 2025 | 3.78M | 4.11M | -8% | 14.13 | 12.72% | 7.03% |
| Jul 10, 2025 | 4.11M | 3.61M | 13.84% | 5.72 | 13.82% | 7.64% |
| Jun 25, 2025 | 3.61M | 3.69M | -2.04% | 10.06 | 12.14% | 6.71% |
| Jun 10, 2025 | 3.69M | 3.75M | -1.62% | 9.55 | 12.39% | 6.85% |
| May 27, 2025 | 3.75M | 3.94M | -4.92% | 10.32 | 12.6% | 6.96% |
| May 09, 2025 | 3.94M | 4.07M | -3.13% | 13.28 | 13.25% | 7.32% |
| Apr 25, 2025 | 4.07M | 3.9M | 4.41% | 13.56 | 13.73% | 7.58% |
| Apr 09, 2025 | 3.9M | 3.71M | 4.91% | 15.52 | n/a | n/a |
| Mar 25, 2025 | 3.71M | 3.7M | 0.28% | 16.05 | n/a | n/a |
| Mar 11, 2025 | 3.7M | 3.46M | 6.92% | 17.43 | n/a | n/a |
| Feb 26, 2025 | 3.46M | 2.72M | 27.45% | 11.83 | n/a | n/a |
| Feb 11, 2025 | 2.72M | 2.39M | 13.55% | 11.29 | n/a | n/a |
| Jan 27, 2025 | 2.39M | 2.3M | 3.94% | 9.4 | n/a | n/a |
| Jan 10, 2025 | 2.3M | 1.22M | 89.03% | 3.57 | n/a | n/a |
| Dec 24, 2024 | 1.22M | 1.21M | 0.99% | 5.25 | n/a | n/a |
| Dec 10, 2024 | 1.21M | 1.04M | 16.01% | 4.88 | n/a | n/a |
| Nov 26, 2024 | 1.04M | 647.12K | 60.63% | 4.31 | n/a | n/a |
| Nov 11, 2024 | 647.12K | 230.69K | 180.51% | 1.89 | n/a | n/a |
| Oct 24, 2024 | 230.69K | n/a | 100% | 1 | n/a | n/a |