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Upstream Bio, Inc. (UPB)
NASDAQ: UPB · Real-Time Price · USD
27.75
+0.01 (0.04%)
At close: Dec 5, 2025, 4:00 PM EST
28.30
+0.55 (1.98%)
After-hours: Dec 5, 2025, 7:47 PM EST

Upstream Bio Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
Dec 5, 202527.8228.4327.0027.7527.750.04%399,840
Dec 4, 202526.6928.4526.6927.7427.742.86%568,481
Dec 3, 202525.0127.1524.9426.9726.977.84%497,282
Dec 2, 202529.6129.8924.6125.0125.01-13.70%839,114
Dec 1, 202528.3229.0828.0728.9828.981.33%418,258
Nov 28, 202528.1428.8928.0628.6028.602.14%144,592
Nov 26, 202529.1233.0027.9028.0028.00-2.88%509,329
Nov 25, 202526.2229.2925.8428.8328.8310.67%675,326
Nov 24, 202525.3526.9925.3226.0526.051.96%1,256,086
Nov 21, 202524.7126.1024.1225.5525.552.36%384,483
Nov 20, 202525.3726.1924.7524.9624.960.08%402,304
Nov 19, 202525.3125.8024.1024.9424.94-2.43%422,235
Nov 18, 202526.2026.2025.0725.5625.56-0.54%585,001
Nov 17, 202524.3926.1524.1425.7025.704.77%527,525
Nov 14, 202523.0825.1023.0124.5324.535.10%801,777
Nov 13, 202523.5223.9922.9923.3423.34-1.60%429,938
Nov 12, 202523.7424.9523.2223.7223.72-0.25%476,587
Nov 11, 202523.3124.8022.8923.7823.781.19%214,970
Nov 10, 202523.5223.8722.5923.5023.502.35%490,481
Nov 7, 202523.6423.6421.9822.9622.96-2.96%271,659
Nov 6, 202524.0024.5823.0323.6623.66-1.29%289,373
Nov 5, 202525.4425.6523.6623.9723.97-4.27%234,637
Nov 4, 202524.2725.5724.0225.0425.040.08%342,735
Nov 3, 202525.9226.2224.7625.0225.02-3.21%317,134
Oct 31, 202525.7026.2525.4825.8525.850.31%215,055
Oct 30, 202523.9326.9023.9325.7725.776.53%353,009
Oct 29, 202524.8225.3323.9524.1924.19-2.62%197,859
Oct 28, 202523.5025.0923.5024.8424.845.34%418,207
Oct 27, 202521.9724.0021.8923.5823.587.87%414,110
Oct 24, 202521.4522.1421.4421.8621.863.45%186,192
Oct 23, 202522.1222.4221.0221.1321.13-4.60%241,381
Oct 22, 202522.2222.6221.9022.1522.15-0.81%450,360
Oct 21, 202523.0323.0322.1422.3322.33-3.12%475,311
Oct 20, 202521.3723.3421.1723.0523.059.92%787,806
Oct 17, 202521.8622.1520.6520.9720.97-5.88%370,897
Oct 16, 202521.7922.3921.3922.2822.282.72%397,419
Oct 15, 202520.1221.8720.1221.6921.698.56%477,981
Oct 14, 202520.6520.6519.6319.9819.98-0.50%261,701
Oct 13, 202519.7920.3119.5620.0820.082.34%218,214
Oct 10, 202519.8020.6819.4619.6219.62-0.86%271,809
Oct 9, 202518.9020.0918.6119.7919.794.60%636,393
Oct 8, 202518.8819.3018.7218.9218.921.34%328,407
Oct 7, 202518.7718.9618.1818.6718.67-1.58%190,145
Oct 6, 202518.7219.4418.7218.9718.971.83%335,262
Oct 3, 202518.6019.0618.6018.6318.630.22%239,518
Oct 2, 202518.6919.0118.3718.5918.59-0.21%336,949
Oct 1, 202518.6719.0018.0518.6318.63-0.96%327,760
Sep 30, 202517.3419.2317.1418.8118.818.48%783,075
Sep 29, 202517.2317.8117.0617.3417.340.46%208,388
Sep 26, 202516.3517.3216.2717.2617.265.82%254,648
Sep 25, 202516.6016.6316.0216.3116.31-2.63%171,304
Sep 24, 202516.2516.7816.2016.7516.752.89%294,785
Sep 23, 202516.5016.7916.1416.2816.28-2.22%190,419
Sep 22, 202516.4016.9816.0016.6516.651.65%322,092
Sep 19, 202517.4117.5916.1616.3816.38-5.15%2,447,213
Sep 18, 202516.2217.4016.1617.2717.277.80%342,799
Sep 17, 202517.3317.7815.5516.0216.02-7.67%540,214
Sep 16, 202516.7817.9716.6117.3517.353.34%593,399
Sep 15, 202517.8318.0016.7916.7916.79-4.44%374,000
Sep 12, 202518.0018.1117.5417.5717.57-1.95%282,530
Sep 11, 202517.7518.1817.4717.9217.920.67%305,365
Sep 10, 202518.2118.7117.0217.8017.80-2.41%526,240
Sep 9, 202518.7218.9417.9818.2418.24-2.62%373,673
Sep 8, 202520.0820.3218.6718.7318.73-6.21%600,744
Sep 5, 202519.8120.4219.0919.9719.971.47%556,222
Sep 4, 202520.0120.2818.5719.6819.68-1.60%563,563
Sep 3, 202520.9421.0319.5820.0020.00-1.28%970,075
Sep 2, 202516.8720.3816.6620.2620.2618.27%2,191,677
Aug 29, 202516.9117.2216.3717.1317.132.21%305,698
Aug 28, 202516.8317.2016.4216.7616.760.36%444,386
Aug 27, 202517.3017.4316.6616.7016.70-3.47%254,424
Aug 26, 202516.9317.7816.9317.3017.303.41%356,186
Aug 25, 202517.6017.6016.5616.7316.73-5.10%215,747
Aug 22, 202517.8318.4817.5417.6317.63-0.62%289,080
Aug 21, 202516.0717.9816.0217.7417.748.44%421,874
Aug 20, 202516.7117.1716.3416.3616.36-3.20%378,945
Aug 19, 202517.9218.2316.5016.9016.90-6.22%507,895
Aug 18, 202518.9319.3717.6718.0218.02-4.81%394,799
Aug 15, 202518.6819.2818.1518.9318.931.66%424,802
Aug 14, 202518.4318.9516.8018.6218.620.32%525,569
Aug 13, 202517.5118.7017.0518.5618.566.06%557,886
Aug 12, 202516.9717.8216.6217.5017.505.49%290,402
Aug 11, 202516.0016.6215.6416.5916.593.69%1,453,429
Aug 8, 202515.8316.0015.1816.0016.001.01%214,758
Aug 7, 202517.0617.5715.8115.8415.84-5.26%371,732
Aug 6, 202515.1916.8015.0516.7216.727.87%366,777
Aug 5, 202515.6616.0615.4515.5015.50-0.70%359,644
Aug 4, 202515.5915.8815.0415.6115.610.45%410,281
Aug 1, 202514.7815.6014.2115.5415.541.50%514,108
Jul 31, 202515.2516.1515.0215.3115.310.79%567,997
Jul 30, 202514.1315.4713.9915.1915.198.73%868,715
Jul 29, 202513.9914.6312.9513.9713.97-2.58%469,215
Jul 28, 202513.7315.2713.5914.3414.345.21%760,748
Jul 25, 202513.5213.9712.7413.6313.632.10%399,320
Jul 24, 202511.5413.6011.4413.3513.3515.78%674,111
Jul 23, 202510.9311.8410.8711.5311.537.26%1,103,441
Jul 22, 202510.5911.1510.5410.7510.751.03%281,399
Jul 21, 202510.7311.0810.6110.6410.64-0.75%198,686
Jul 18, 202511.1111.3610.6310.7210.72-2.90%225,652
Jul 17, 202511.0011.4410.7811.0411.041.10%561,208