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Upstream Bio, Inc. (UPB)
NASDAQ: UPB · Real-Time Price · USD
6.15
+0.23 (3.89%)
At close: Jun 17, 2026, 4:00 PM EDT
6.27
+0.12 (1.95%)
After-hours: Jun 17, 2026, 5:41 PM EDT

Upstream Bio Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
Jun 17, 20265.946.335.886.156.153.89%839,633
Jun 16, 20266.106.195.865.925.92-2.95%519,856
Jun 15, 20266.196.286.016.106.10-681,421
Jun 12, 20266.036.475.856.106.10-4.39%1,431,983
Jun 11, 20266.286.406.116.386.381.59%833,080
Jun 10, 20266.646.806.256.286.28-6.13%439,386
Jun 9, 20266.536.786.426.696.693.72%500,520
Jun 8, 20267.167.166.416.456.45-8.51%783,296
Jun 5, 20267.397.456.987.057.05-5.11%672,310
Jun 4, 20267.687.787.307.437.43-2.62%688,030
Jun 3, 20267.527.867.407.637.635.24%666,426
Jun 2, 20267.967.967.197.257.25-10.27%631,528
Jun 1, 20268.338.647.998.088.08-3.35%595,029
May 29, 20268.318.508.178.368.360.48%498,879
May 28, 20268.248.388.138.328.320.73%320,803
May 27, 20268.198.558.198.268.260.61%420,279
May 26, 20268.448.458.118.218.21-1.91%593,003
May 22, 20268.478.698.338.378.37-1.06%354,422
May 21, 20268.358.608.258.468.460.59%597,539
May 20, 20268.028.567.998.418.414.73%593,025
May 19, 20268.428.648.028.038.03-5.64%853,221
May 18, 20268.979.138.128.518.51-6.38%510,982
May 15, 20268.599.148.559.099.093.41%979,925
May 14, 20269.459.528.518.798.79-6.09%568,869
May 13, 20268.969.478.809.369.364.58%815,600
May 12, 20268.939.148.838.958.95-1.76%467,500
May 11, 20269.209.609.059.119.110.22%618,895
May 8, 20268.889.358.809.099.091.17%456,143
May 7, 20269.149.148.698.998.99-2.23%272,845
May 6, 20269.169.298.989.199.190.77%409,194
May 5, 20269.319.508.889.129.12-2.04%262,659
May 4, 20269.349.579.169.319.31-0.96%300,447
May 1, 20269.259.419.129.409.402.40%489,698
Apr 30, 20269.209.309.069.189.18-0.11%395,121
Apr 29, 20269.329.378.979.199.19-3.36%415,823
Apr 28, 20269.329.659.289.519.512.37%474,584
Apr 27, 20269.229.649.159.299.29-0.11%664,744
Apr 24, 20269.479.639.219.309.30-3.12%558,825
Apr 23, 20269.629.729.389.609.60-0.41%427,993
Apr 22, 20269.319.719.069.649.644.10%624,774
Apr 21, 202610.0110.059.229.269.26-7.31%526,972
Apr 20, 20269.9810.099.799.999.99-387,901
Apr 17, 202610.4510.649.849.999.99-1.09%661,733
Apr 16, 20269.8810.159.6810.1010.102.23%1,152,806
Apr 15, 202610.4010.529.799.889.88-4.45%552,409
Apr 14, 202610.1410.4510.0810.3410.341.08%645,990
Apr 13, 202610.4510.6110.0910.2310.23-2.48%412,646
Apr 10, 202610.4810.6710.3410.4910.490.67%733,343
Apr 9, 20269.6710.499.6310.4210.425.89%813,224
Apr 8, 20269.8710.009.459.849.841.44%474,363