Upstream Bio, Inc. (UPB)
NASDAQ: UPB · Real-Time Price · USD
9.51
+0.22 (2.37%)
At close: Apr 28, 2026, 4:00 PM EDT
9.50
-0.01 (-0.11%)
After-hours: Apr 28, 2026, 4:32 PM EDT
Upstream Bio Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Apr 28, 2026 | 9.32 | 9.65 | 9.28 | 9.51 | 9.51 | 2.37% | 474,434 |
| Apr 27, 2026 | 9.22 | 9.64 | 9.15 | 9.29 | 9.29 | -0.11% | 664,739 |
| Apr 24, 2026 | 9.47 | 9.63 | 9.21 | 9.30 | 9.30 | -3.12% | 558,825 |
| Apr 23, 2026 | 9.62 | 9.72 | 9.38 | 9.60 | 9.60 | -0.41% | 427,993 |
| Apr 22, 2026 | 9.31 | 9.71 | 9.06 | 9.64 | 9.64 | 4.10% | 624,770 |
| Apr 21, 2026 | 10.01 | 10.05 | 9.22 | 9.26 | 9.26 | -7.31% | 526,274 |
| Apr 20, 2026 | 9.98 | 10.09 | 9.79 | 9.99 | 9.99 | - | 387,572 |
| Apr 17, 2026 | 10.45 | 10.64 | 9.84 | 9.99 | 9.99 | -1.09% | 661,401 |
| Apr 16, 2026 | 9.88 | 10.15 | 9.68 | 10.10 | 10.10 | 2.23% | 1,152,729 |
| Apr 15, 2026 | 10.40 | 10.52 | 9.79 | 9.88 | 9.88 | -4.45% | 552,117 |
| Apr 14, 2026 | 10.14 | 10.45 | 10.08 | 10.34 | 10.34 | 1.08% | 645,890 |
| Apr 13, 2026 | 10.45 | 10.61 | 10.09 | 10.23 | 10.23 | -2.48% | 412,545 |
| Apr 10, 2026 | 10.48 | 10.67 | 10.34 | 10.49 | 10.49 | 0.67% | 733,145 |
| Apr 9, 2026 | 9.67 | 10.49 | 9.63 | 10.42 | 10.42 | 5.89% | 812,951 |
| Apr 8, 2026 | 9.87 | 10.00 | 9.45 | 9.84 | 9.84 | 1.44% | 474,331 |
| Apr 7, 2026 | 9.59 | 9.71 | 9.31 | 9.70 | 9.70 | -0.21% | 316,820 |
| Apr 6, 2026 | 9.49 | 9.89 | 9.36 | 9.72 | 9.72 | 2.32% | 501,444 |
| Apr 2, 2026 | 9.06 | 9.64 | 8.97 | 9.50 | 9.50 | 2.04% | 537,599 |
| Apr 1, 2026 | 9.22 | 9.35 | 8.96 | 9.31 | 9.31 | 3.44% | 848,430 |
| Mar 31, 2026 | 9.01 | 9.17 | 8.82 | 9.00 | 9.00 | 2.51% | 1,026,106 |
| Mar 30, 2026 | 8.53 | 8.78 | 8.29 | 8.78 | 8.78 | 1.27% | 862,875 |
| Mar 27, 2026 | 8.72 | 9.15 | 8.10 | 8.67 | 8.67 | -11.44% | 938,057 |
| Mar 26, 2026 | 9.48 | 10.43 | 9.38 | 9.79 | 9.79 | 3.38% | 876,223 |
| Mar 25, 2026 | 8.68 | 9.57 | 8.67 | 9.47 | 9.47 | 12.07% | 672,921 |
| Mar 24, 2026 | 8.35 | 8.62 | 8.12 | 8.45 | 8.45 | - | 699,711 |
| Mar 23, 2026 | 8.71 | 9.03 | 8.43 | 8.45 | 8.45 | -2.54% | 743,215 |
| Mar 20, 2026 | 8.38 | 8.68 | 8.16 | 8.67 | 8.67 | 3.46% | 3,020,209 |
| Mar 19, 2026 | 8.44 | 8.63 | 8.23 | 8.38 | 8.38 | -3.29% | 733,628 |
| Mar 18, 2026 | 9.58 | 9.70 | 8.66 | 8.67 | 8.67 | -10.76% | 719,494 |
| Mar 17, 2026 | 9.58 | 9.90 | 9.17 | 9.71 | 9.71 | 1.04% | 914,396 |
| Mar 16, 2026 | 9.29 | 9.68 | 9.27 | 9.61 | 9.61 | 4.12% | 663,291 |
| Mar 13, 2026 | 9.32 | 9.76 | 8.93 | 9.23 | 9.23 | -2.17% | 723,097 |
| Mar 12, 2026 | 9.27 | 9.47 | 8.70 | 9.44 | 9.44 | 0.80% | 1,135,699 |
| Mar 11, 2026 | 8.16 | 9.37 | 8.16 | 9.36 | 9.36 | 15.27% | 1,689,779 |
| Mar 10, 2026 | 8.15 | 8.36 | 7.99 | 8.12 | 8.12 | 0.74% | 652,378 |
| Mar 9, 2026 | 7.65 | 8.09 | 7.64 | 8.06 | 8.06 | 5.22% | 1,189,764 |
| Mar 6, 2026 | 7.47 | 7.77 | 7.40 | 7.66 | 7.66 | -0.13% | 662,851 |
| Mar 5, 2026 | 7.64 | 7.78 | 7.40 | 7.67 | 7.67 | -1.67% | 941,663 |
| Mar 4, 2026 | 7.37 | 8.01 | 7.33 | 7.80 | 7.80 | 5.98% | 1,151,748 |
| Mar 3, 2026 | 7.59 | 7.64 | 7.25 | 7.36 | 7.36 | -4.42% | 977,262 |
| Mar 2, 2026 | 7.51 | 7.92 | 7.46 | 7.70 | 7.70 | 0.26% | 1,655,280 |
| Feb 27, 2026 | 7.87 | 8.07 | 7.62 | 7.68 | 7.68 | -2.78% | 1,436,021 |
| Feb 26, 2026 | 7.74 | 8.32 | 7.70 | 7.90 | 7.90 | 2.07% | 1,497,001 |
| Feb 25, 2026 | 7.90 | 8.10 | 7.70 | 7.74 | 7.74 | -2.27% | 987,847 |
| Feb 24, 2026 | 8.05 | 8.27 | 7.78 | 7.92 | 7.92 | -1.25% | 1,538,700 |
| Feb 23, 2026 | 8.09 | 8.32 | 7.74 | 8.02 | 8.02 | -0.74% | 1,625,716 |
| Feb 20, 2026 | 8.41 | 8.69 | 8.01 | 8.08 | 8.08 | -5.39% | 3,597,516 |
| Feb 19, 2026 | 8.32 | 8.73 | 8.14 | 8.54 | 8.54 | 3.02% | 1,924,110 |
| Feb 18, 2026 | 8.18 | 8.66 | 7.93 | 8.29 | 8.29 | -0.48% | 2,893,163 |
| Feb 17, 2026 | 8.69 | 9.00 | 7.96 | 8.33 | 8.33 | -4.80% | 6,025,969 |
| Feb 13, 2026 | 12.69 | 12.69 | 8.52 | 8.75 | 8.75 | -31.64% | 6,503,631 |
| Feb 12, 2026 | 14.86 | 14.86 | 12.75 | 12.80 | 12.80 | -12.87% | 3,879,133 |
| Feb 11, 2026 | 19.00 | 20.01 | 12.65 | 14.69 | 14.69 | -47.18% | 8,848,205 |
| Feb 10, 2026 | 26.10 | 28.58 | 25.93 | 27.81 | 27.81 | 6.47% | 800,791 |
| Feb 9, 2026 | 26.24 | 26.24 | 25.16 | 26.12 | 26.12 | -0.31% | 509,701 |
| Feb 6, 2026 | 26.56 | 27.98 | 25.94 | 26.20 | 26.20 | 0.77% | 517,906 |
| Feb 5, 2026 | 29.40 | 30.31 | 25.87 | 26.00 | 26.00 | -11.50% | 619,509 |
| Feb 4, 2026 | 30.88 | 30.88 | 28.35 | 29.38 | 29.38 | -4.58% | 610,504 |
| Feb 3, 2026 | 30.38 | 31.05 | 29.82 | 30.79 | 30.79 | 2.84% | 635,741 |
| Feb 2, 2026 | 31.10 | 32.38 | 29.64 | 29.94 | 29.94 | -3.67% | 783,093 |
| Jan 30, 2026 | 30.64 | 31.37 | 29.71 | 31.08 | 31.08 | 0.45% | 667,528 |
| Jan 29, 2026 | 30.30 | 31.12 | 29.61 | 30.94 | 30.94 | 1.68% | 459,682 |
| Jan 28, 2026 | 32.50 | 32.50 | 29.99 | 30.43 | 30.43 | -6.37% | 658,138 |
| Jan 27, 2026 | 30.24 | 32.83 | 30.13 | 32.50 | 32.50 | 7.76% | 1,068,844 |
| Jan 26, 2026 | 29.77 | 30.91 | 29.76 | 30.16 | 30.16 | 0.47% | 545,748 |
| Jan 23, 2026 | 31.62 | 31.62 | 29.83 | 30.02 | 30.02 | -5.57% | 371,092 |
| Jan 22, 2026 | 31.74 | 32.52 | 31.70 | 31.79 | 31.79 | 0.63% | 402,451 |
| Jan 21, 2026 | 30.95 | 32.14 | 30.31 | 31.59 | 31.59 | 1.90% | 468,367 |
| Jan 20, 2026 | 30.22 | 31.52 | 29.08 | 31.00 | 31.00 | - | 774,067 |
| Jan 16, 2026 | 31.06 | 31.64 | 29.80 | 31.00 | 31.00 | 0.32% | 418,416 |
| Jan 15, 2026 | 32.42 | 32.42 | 30.74 | 30.90 | 30.90 | -4.33% | 718,897 |
| Jan 14, 2026 | 32.68 | 33.68 | 31.95 | 32.30 | 32.30 | -0.92% | 620,972 |
| Jan 13, 2026 | 31.71 | 32.66 | 30.48 | 32.60 | 32.60 | 2.97% | 834,721 |
| Jan 12, 2026 | 29.73 | 31.93 | 29.34 | 31.66 | 31.66 | 6.42% | 678,977 |
| Jan 9, 2026 | 27.87 | 30.60 | 27.87 | 29.75 | 29.75 | 8.02% | 851,461 |
| Jan 8, 2026 | 27.71 | 28.49 | 27.22 | 27.54 | 27.54 | -1.92% | 502,764 |
| Jan 7, 2026 | 26.08 | 28.16 | 26.08 | 28.08 | 28.08 | 8.54% | 700,323 |
| Jan 6, 2026 | 25.93 | 26.52 | 25.00 | 25.87 | 25.87 | -1.00% | 452,815 |
| Jan 5, 2026 | 27.07 | 27.39 | 25.25 | 26.13 | 26.13 | -3.47% | 689,799 |
| Jan 2, 2026 | 27.30 | 28.01 | 26.72 | 27.07 | 27.07 | -0.29% | 586,439 |
| Dec 31, 2025 | 27.17 | 27.58 | 26.86 | 27.15 | 27.15 | -0.62% | 517,846 |
| Dec 30, 2025 | 28.77 | 28.77 | 26.86 | 27.32 | 27.32 | -5.24% | 831,474 |
| Dec 29, 2025 | 29.48 | 29.92 | 28.70 | 28.83 | 28.83 | -2.20% | 238,342 |
| Dec 26, 2025 | 30.11 | 30.11 | 29.10 | 29.48 | 29.48 | -2.61% | 228,014 |
| Dec 24, 2025 | 29.65 | 30.76 | 29.60 | 30.27 | 30.27 | 3.63% | 266,481 |
| Dec 23, 2025 | 30.27 | 30.76 | 29.05 | 29.21 | 29.21 | -4.01% | 347,234 |
| Dec 22, 2025 | 29.29 | 30.89 | 29.00 | 30.43 | 30.43 | 3.68% | 701,354 |
| Dec 19, 2025 | 30.01 | 30.56 | 29.19 | 29.35 | 29.35 | -1.71% | 1,463,070 |
| Dec 18, 2025 | 29.09 | 30.27 | 28.36 | 29.86 | 29.86 | 5.40% | 795,855 |
| Dec 17, 2025 | 29.41 | 29.95 | 28.15 | 28.33 | 28.33 | -3.38% | 439,687 |
| Dec 16, 2025 | 26.92 | 29.73 | 26.03 | 29.32 | 29.32 | 7.79% | 932,274 |
| Dec 15, 2025 | 27.56 | 27.95 | 26.68 | 27.20 | 27.20 | 0.22% | 1,173,600 |
| Dec 12, 2025 | 28.00 | 28.25 | 26.78 | 27.14 | 27.14 | -1.20% | 305,420 |
| Dec 11, 2025 | 28.72 | 29.51 | 27.16 | 27.47 | 27.47 | -4.19% | 661,765 |
| Dec 10, 2025 | 28.37 | 29.55 | 27.93 | 28.67 | 28.67 | 1.08% | 342,285 |
| Dec 9, 2025 | 28.73 | 29.17 | 27.99 | 28.37 | 28.37 | -2.09% | 403,427 |
| Dec 8, 2025 | 28.03 | 29.50 | 27.91 | 28.97 | 28.97 | 4.40% | 345,155 |
| Dec 5, 2025 | 27.82 | 28.43 | 27.00 | 27.75 | 27.75 | 0.04% | 399,865 |
| Dec 4, 2025 | 26.69 | 28.45 | 26.69 | 27.74 | 27.74 | 2.86% | 568,481 |
| Dec 3, 2025 | 25.01 | 27.15 | 24.94 | 26.97 | 26.97 | 7.84% | 497,292 |