Upstream Bio, Inc. (UPB)
NASDAQ: UPB · Real-Time Price · USD
19.79
+0.87 (4.60%)
Oct 9, 2025, 4:00 PM EDT - Market closed
Upstream Bio Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Oct 9, 2025 | 18.90 | 20.09 | 18.61 | 19.79 | 19.79 | 4.60% | 636,331 |
| Oct 8, 2025 | 18.88 | 19.30 | 18.72 | 18.92 | 18.92 | 1.34% | 328,407 |
| Oct 7, 2025 | 18.77 | 18.96 | 18.18 | 18.67 | 18.67 | -1.58% | 190,145 |
| Oct 6, 2025 | 18.72 | 19.44 | 18.72 | 18.97 | 18.97 | 1.83% | 335,262 |
| Oct 3, 2025 | 18.60 | 19.06 | 18.60 | 18.63 | 18.63 | 0.22% | 239,518 |
| Oct 2, 2025 | 18.69 | 19.01 | 18.37 | 18.59 | 18.59 | -0.21% | 336,949 |
| Oct 1, 2025 | 18.67 | 19.00 | 18.05 | 18.63 | 18.63 | -0.96% | 327,760 |
| Sep 30, 2025 | 17.34 | 19.23 | 17.14 | 18.81 | 18.81 | 8.48% | 783,075 |
| Sep 29, 2025 | 17.23 | 17.81 | 17.06 | 17.34 | 17.34 | 0.46% | 208,388 |
| Sep 26, 2025 | 16.35 | 17.32 | 16.27 | 17.26 | 17.26 | 5.82% | 254,648 |
| Sep 25, 2025 | 16.60 | 16.63 | 16.02 | 16.31 | 16.31 | -2.63% | 171,304 |
| Sep 24, 2025 | 16.25 | 16.78 | 16.20 | 16.75 | 16.75 | 2.89% | 294,785 |
| Sep 23, 2025 | 16.50 | 16.79 | 16.14 | 16.28 | 16.28 | -2.22% | 190,419 |
| Sep 22, 2025 | 16.40 | 16.98 | 16.00 | 16.65 | 16.65 | 1.65% | 322,092 |
| Sep 19, 2025 | 17.41 | 17.59 | 16.16 | 16.38 | 16.38 | -5.15% | 2,447,213 |
| Sep 18, 2025 | 16.22 | 17.40 | 16.16 | 17.27 | 17.27 | 7.80% | 342,799 |
| Sep 17, 2025 | 17.33 | 17.78 | 15.55 | 16.02 | 16.02 | -7.67% | 540,214 |
| Sep 16, 2025 | 16.78 | 17.97 | 16.61 | 17.35 | 17.35 | 3.34% | 593,399 |
| Sep 15, 2025 | 17.83 | 18.00 | 16.79 | 16.79 | 16.79 | -4.44% | 374,000 |
| Sep 12, 2025 | 18.00 | 18.11 | 17.54 | 17.57 | 17.57 | -1.95% | 282,530 |
| Sep 11, 2025 | 17.75 | 18.18 | 17.47 | 17.92 | 17.92 | 0.67% | 305,365 |
| Sep 10, 2025 | 18.21 | 18.71 | 17.02 | 17.80 | 17.80 | -2.41% | 526,240 |
| Sep 9, 2025 | 18.72 | 18.94 | 17.98 | 18.24 | 18.24 | -2.62% | 373,673 |
| Sep 8, 2025 | 20.08 | 20.32 | 18.67 | 18.73 | 18.73 | -6.21% | 600,744 |
| Sep 5, 2025 | 19.81 | 20.42 | 19.09 | 19.97 | 19.97 | 1.47% | 556,222 |
| Sep 4, 2025 | 20.01 | 20.28 | 18.57 | 19.68 | 19.68 | -1.60% | 563,563 |
| Sep 3, 2025 | 20.94 | 21.03 | 19.58 | 20.00 | 20.00 | -1.28% | 969,892 |
| Sep 2, 2025 | 16.87 | 20.38 | 16.66 | 20.26 | 20.26 | 18.27% | 2,191,677 |
| Aug 29, 2025 | 16.91 | 17.22 | 16.37 | 17.13 | 17.13 | 2.21% | 305,698 |
| Aug 28, 2025 | 16.83 | 17.20 | 16.42 | 16.76 | 16.76 | 0.36% | 444,386 |
| Aug 27, 2025 | 17.30 | 17.43 | 16.66 | 16.70 | 16.70 | -3.47% | 254,424 |
| Aug 26, 2025 | 16.93 | 17.78 | 16.93 | 17.30 | 17.30 | 3.41% | 356,186 |
| Aug 25, 2025 | 17.60 | 17.60 | 16.56 | 16.73 | 16.73 | -5.10% | 215,747 |
| Aug 22, 2025 | 17.83 | 18.48 | 17.54 | 17.63 | 17.63 | -0.62% | 289,080 |
| Aug 21, 2025 | 16.07 | 17.98 | 16.02 | 17.74 | 17.74 | 8.44% | 421,874 |
| Aug 20, 2025 | 16.71 | 17.17 | 16.34 | 16.36 | 16.36 | -3.20% | 378,945 |
| Aug 19, 2025 | 17.92 | 18.23 | 16.50 | 16.90 | 16.90 | -6.22% | 507,895 |
| Aug 18, 2025 | 18.93 | 19.37 | 17.67 | 18.02 | 18.02 | -4.81% | 394,799 |
| Aug 15, 2025 | 18.68 | 19.28 | 18.15 | 18.93 | 18.93 | 1.66% | 424,802 |
| Aug 14, 2025 | 18.43 | 18.95 | 16.80 | 18.62 | 18.62 | 0.32% | 525,569 |
| Aug 13, 2025 | 17.51 | 18.70 | 17.05 | 18.56 | 18.56 | 6.06% | 557,886 |
| Aug 12, 2025 | 16.97 | 17.82 | 16.62 | 17.50 | 17.50 | 5.49% | 290,402 |
| Aug 11, 2025 | 16.00 | 16.62 | 15.64 | 16.59 | 16.59 | 3.69% | 1,453,429 |
| Aug 8, 2025 | 15.83 | 16.00 | 15.18 | 16.00 | 16.00 | 1.01% | 214,758 |
| Aug 7, 2025 | 17.06 | 17.57 | 15.81 | 15.84 | 15.84 | -5.26% | 371,732 |
| Aug 6, 2025 | 15.19 | 16.80 | 15.05 | 16.72 | 16.72 | 7.87% | 366,777 |
| Aug 5, 2025 | 15.66 | 16.06 | 15.45 | 15.50 | 15.50 | -0.70% | 359,644 |
| Aug 4, 2025 | 15.59 | 15.88 | 15.04 | 15.61 | 15.61 | 0.45% | 410,281 |
| Aug 1, 2025 | 14.78 | 15.60 | 14.21 | 15.54 | 15.54 | 1.50% | 514,108 |
| Jul 31, 2025 | 15.25 | 16.15 | 15.02 | 15.31 | 15.31 | 0.79% | 567,997 |