Upstream Bio, Inc. (UPB)
NASDAQ: UPB · Real-Time Price · USD
2.870
+0.130 (4.74%)
Oct 26, 2026, 2:26 PM EDT - Market open
Upstream Bio Stock Price History
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Oct 26, 2026 | 2.75 | 2.97 | 2.72 | 2.87 | 2.87 | 4.74% | 488,680 |
| Oct 23, 2026 | 2.95 | 2.96 | 2.70 | 2.74 | 2.74 | -8.36% | 1,051,217 |
| Oct 22, 2026 | 2.77 | 2.99 | 2.70 | 2.99 | 2.99 | 6.79% | 1,450,028 |
| Oct 21, 2026 | 2.83 | 2.98 | 2.77 | 2.80 | 2.80 | -0.71% | 1,410,488 |
| Oct 20, 2026 | 2.79 | 3.09 | 2.78 | 2.82 | 2.82 | 0.71% | 1,676,022 |
| Oct 19, 2026 | 2.76 | 3.07 | 2.75 | 2.80 | 2.80 | 1.45% | 1,603,699 |
| Oct 16, 2026 | 3.39 | 3.39 | 2.74 | 2.76 | 2.76 | -18.10% | 1,836,415 |
| Oct 15, 2026 | 3.44 | 3.56 | 3.29 | 3.37 | 3.37 | -1.46% | 1,285,463 |
| Oct 14, 2026 | 3.48 | 3.60 | 3.29 | 3.42 | 3.42 | -3.66% | 1,574,473 |
| Oct 13, 2026 | 4.14 | 4.16 | 3.52 | 3.55 | 3.55 | -14.87% | 1,037,523 |
| Oct 12, 2026 | 4.68 | 4.72 | 4.12 | 4.17 | 4.17 | -11.28% | 848,408 |
| Oct 9, 2026 | 4.54 | 4.76 | 4.51 | 4.70 | 4.70 | 3.30% | 1,187,830 |
| Oct 8, 2026 | 4.53 | 4.65 | 4.37 | 4.55 | 4.55 | -1.30% | 2,857,189 |
| Oct 7, 2026 | 4.55 | 4.72 | 4.50 | 4.61 | 4.61 | 0.44% | 908,403 |
| Oct 6, 2026 | 4.84 | 4.87 | 4.53 | 4.59 | 4.59 | -5.36% | 1,062,306 |
| Oct 5, 2026 | 5.07 | 5.10 | 4.67 | 4.85 | 4.85 | -3.77% | 1,010,578 |
| Oct 2, 2026 | 5.12 | 5.21 | 4.86 | 5.04 | 5.04 | - | 956,519 |
| Oct 1, 2026 | 5.25 | 5.35 | 4.98 | 5.04 | 5.04 | -4.36% | 832,377 |
| Sep 30, 2026 | 5.23 | 5.46 | 5.15 | 5.27 | 5.27 | 1.54% | 851,221 |
| Sep 29, 2026 | 5.28 | 5.31 | 4.99 | 5.19 | 5.19 | -2.08% | 784,211 |
| Sep 28, 2026 | 5.34 | 5.39 | 5.12 | 5.30 | 5.30 | -1.12% | 615,402 |
| Sep 25, 2026 | 5.20 | 5.39 | 5.07 | 5.36 | 5.36 | 3.68% | 429,212 |
| Sep 24, 2026 | 5.19 | 5.20 | 5.05 | 5.17 | 5.17 | -0.39% | 566,581 |
| Sep 23, 2026 | 5.48 | 5.49 | 4.99 | 5.19 | 5.19 | -5.46% | 552,994 |
| Sep 22, 2026 | 5.44 | 5.56 | 5.38 | 5.49 | 5.49 | 2.33% | 360,533 |
| Sep 21, 2026 | 5.42 | 5.44 | 5.27 | 5.37 | 5.37 | 0.47% | 364,035 |
| Sep 18, 2026 | 5.32 | 5.41 | 5.21 | 5.34 | 5.34 | 0.56% | 1,000,981 |
| Sep 17, 2026 | 5.44 | 5.48 | 5.24 | 5.31 | 5.31 | -0.38% | 533,871 |
| Sep 16, 2026 | 5.49 | 5.54 | 5.27 | 5.33 | 5.33 | -2.74% | 497,239 |
| Sep 15, 2026 | 5.81 | 5.81 | 5.46 | 5.48 | 5.48 | -5.68% | 421,265 |
| Sep 14, 2026 | 5.75 | 5.87 | 5.70 | 5.81 | 5.81 | 1.40% | 491,023 |
| Sep 11, 2026 | 5.84 | 5.84 | 5.65 | 5.73 | 5.73 | -0.35% | 501,306 |
| Sep 10, 2026 | 5.86 | 5.86 | 5.67 | 5.75 | 5.75 | -3.52% | 562,410 |
| Sep 9, 2026 | 6.14 | 6.20 | 5.77 | 5.96 | 5.96 | -3.72% | 726,236 |
| Sep 8, 2026 | 6.01 | 6.21 | 5.77 | 6.19 | 6.19 | 3.00% | 952,239 |
| Sep 4, 2026 | 6.00 | 6.23 | 5.97 | 6.01 | 6.01 | -1.15% | 643,266 |
| Sep 3, 2026 | 6.49 | 6.49 | 5.77 | 6.08 | 6.08 | -6.17% | 1,351,772 |
| Sep 2, 2026 | 6.62 | 6.98 | 6.41 | 6.48 | 6.48 | -1.07% | 515,755 |
| 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 |