Upstream Bio, Inc. (UPB)
NASDAQ: UPB · Real-Time Price · USD
5.96
-0.23 (-3.72%)
At close: Sep 9, 2026, 4:00 PM EDT
5.88
-0.08 (-1.34%)
After-hours: Sep 9, 2026, 5:15 PM EDT
Upstream Bio Stock Price History
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Sep 9, 2026 | 6.14 | 6.20 | 5.77 | 5.96 | 5.96 | -3.72% | 726,090 |
| Sep 8, 2026 | 6.01 | 6.21 | 5.77 | 6.19 | 6.19 | 3.00% | 948,868 |
| Sep 4, 2026 | 6.00 | 6.23 | 5.97 | 6.01 | 6.01 | -1.15% | 531,721 |
| Sep 3, 2026 | 6.49 | 6.49 | 5.77 | 6.08 | 6.08 | -6.17% | 1,344,134 |
| Sep 2, 2026 | 6.62 | 6.98 | 6.41 | 6.48 | 6.48 | -1.07% | 515,602 |
| Sep 1, 2026 | 6.58 | 6.72 | 6.50 | 6.55 | 6.55 | -1.06% | 476,486 |
| Aug 31, 2026 | 6.64 | 6.77 | 6.44 | 6.62 | 6.62 | -1.05% | 895,008 |
| Aug 28, 2026 | 6.71 | 6.79 | 6.60 | 6.69 | 6.69 | -1.47% | 445,476 |
| Aug 27, 2026 | 7.11 | 7.14 | 6.78 | 6.79 | 6.79 | -4.77% | 335,062 |
| Aug 26, 2026 | 7.18 | 7.31 | 6.90 | 7.13 | 7.13 | -0.70% | 432,931 |
| Aug 25, 2026 | 6.68 | 7.18 | 6.55 | 7.18 | 7.18 | 8.62% | 554,420 |
| Aug 24, 2026 | 7.00 | 7.11 | 6.46 | 6.61 | 6.61 | -5.16% | 538,545 |
| Aug 21, 2026 | 6.91 | 7.01 | 6.85 | 6.97 | 6.97 | 1.75% | 434,241 |
| Aug 20, 2026 | 7.48 | 7.56 | 6.75 | 6.85 | 6.85 | -8.85% | 592,938 |
| Aug 19, 2026 | 7.04 | 7.53 | 6.91 | 7.52 | 7.52 | 9.71% | 574,178 |
| Aug 18, 2026 | 7.28 | 7.44 | 6.73 | 6.85 | 6.85 | -4.06% | 461,779 |
| Aug 17, 2026 | 7.02 | 7.19 | 6.86 | 7.14 | 7.14 | 0.99% | 852,441 |
| Aug 14, 2026 | 6.95 | 7.14 | 6.80 | 7.07 | 7.07 | 2.32% | 688,249 |
| Aug 13, 2026 | 7.02 | 7.04 | 6.87 | 6.91 | 6.91 | - | 378,835 |
| Aug 12, 2026 | 7.00 | 7.25 | 6.84 | 6.91 | 6.91 | -2.54% | 635,221 |
| Aug 11, 2026 | 7.48 | 7.70 | 7.01 | 7.09 | 7.09 | -4.70% | 628,055 |
| Aug 10, 2026 | 7.32 | 7.62 | 7.20 | 7.44 | 7.44 | 2.62% | 869,591 |
| Aug 7, 2026 | 6.94 | 7.26 | 6.89 | 7.25 | 7.25 | 5.53% | 621,845 |
| Aug 6, 2026 | 6.75 | 7.17 | 6.66 | 6.87 | 6.87 | 1.93% | 427,171 |
| Aug 5, 2026 | 6.77 | 6.88 | 6.58 | 6.74 | 6.74 | -0.74% | 917,311 |
| Aug 4, 2026 | 6.40 | 6.92 | 6.40 | 6.79 | 6.79 | 5.76% | 1,362,497 |
| Aug 3, 2026 | 6.31 | 6.43 | 6.18 | 6.42 | 6.42 | 1.74% | 774,290 |
| Jul 31, 2026 | 6.58 | 6.69 | 6.29 | 6.31 | 6.31 | -3.96% | 297,714 |
| Jul 30, 2026 | 6.35 | 6.67 | 6.29 | 6.57 | 6.57 | 2.50% | 320,722 |
| Jul 29, 2026 | 6.39 | 6.48 | 6.21 | 6.41 | 6.41 | 0.16% | 702,778 |
| Jul 28, 2026 | 6.40 | 6.54 | 6.09 | 6.40 | 6.40 | - | 433,233 |
| Jul 27, 2026 | 6.47 | 6.60 | 6.26 | 6.40 | 6.40 | -0.16% | 459,477 |
| Jul 24, 2026 | 6.40 | 6.61 | 6.16 | 6.41 | 6.41 | 0.16% | 626,431 |
| Jul 23, 2026 | 6.46 | 6.59 | 6.32 | 6.40 | 6.40 | -2.88% | 626,145 |
| Jul 22, 2026 | 6.95 | 6.99 | 6.47 | 6.59 | 6.59 | -5.59% | 704,553 |
| Jul 21, 2026 | 6.92 | 7.08 | 6.86 | 6.98 | 6.98 | - | 340,980 |
| Jul 20, 2026 | 6.99 | 7.15 | 6.80 | 6.98 | 6.98 | -0.43% | 457,973 |
| Jul 17, 2026 | 7.08 | 7.30 | 6.90 | 7.01 | 7.01 | -3.04% | 378,032 |
| Jul 16, 2026 | 7.24 | 7.34 | 6.98 | 7.23 | 7.23 | -0.55% | 561,160 |
| Jul 15, 2026 | 7.12 | 7.32 | 7.08 | 7.27 | 7.27 | 1.82% | 332,111 |
| Jul 14, 2026 | 7.28 | 7.34 | 7.00 | 7.14 | 7.14 | -1.92% | 344,693 |
| Jul 13, 2026 | 7.47 | 7.53 | 7.02 | 7.28 | 7.28 | -3.32% | 266,138 |
| Jul 10, 2026 | 7.81 | 7.81 | 7.28 | 7.53 | 7.53 | -3.59% | 341,716 |
| Jul 9, 2026 | 7.98 | 8.00 | 7.57 | 7.81 | 7.81 | -2.13% | 467,536 |
| Jul 8, 2026 | 7.73 | 8.00 | 7.53 | 7.98 | 7.98 | 1.53% | 635,113 |
| Jul 7, 2026 | 7.48 | 8.00 | 7.32 | 7.86 | 7.86 | 6.22% | 809,452 |
| Jul 6, 2026 | 7.50 | 7.59 | 7.34 | 7.40 | 7.40 | -1.46% | 357,006 |
| Jul 2, 2026 | 7.31 | 7.72 | 7.16 | 7.51 | 7.51 | 3.16% | 363,212 |
| Jul 1, 2026 | 6.90 | 7.42 | 6.81 | 7.28 | 7.28 | 5.20% | 560,983 |
| Jun 30, 2026 | 6.94 | 7.38 | 6.88 | 6.92 | 6.92 | -0.14% | 557,817 |