Skip to main content
Upstream Bio, Inc. (UPB)
NASDAQ: UPB · Real-Time Price · USD
6.93
+0.18 (2.67%)
At close: Jun 29, 2026, 4:00 PM EDT
6.93
0.00 (0.00%)
After-hours: Jun 29, 2026, 4:10 PM EDT

Upstream Bio Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
Jun 29, 20266.776.886.566.99-3.56%526,123
Jun 26, 20266.366.786.356.756.756.13%1,301,923
Jun 25, 20266.326.576.286.366.360.16%469,883
Jun 24, 20266.356.716.326.356.350.47%654,584
Jun 23, 20266.266.546.246.326.320.32%623,889
Jun 22, 20266.336.606.256.306.300.80%849,285
Jun 18, 20266.266.526.156.256.251.63%829,656
Jun 17, 20265.946.335.886.156.153.89%839,752
Jun 16, 20266.106.195.865.925.92-2.95%519,892
Jun 15, 20266.196.286.016.106.10-681,422
Jun 12, 20266.036.475.856.106.10-4.39%1,432,201
Jun 11, 20266.286.406.116.386.381.59%833,518
Jun 10, 20266.646.806.256.286.28-6.13%450,141
Jun 9, 20266.536.786.426.696.693.72%500,531
Jun 8, 20267.167.166.416.456.45-8.51%783,894
Jun 5, 20267.397.456.987.057.05-5.11%672,556
Jun 4, 20267.687.787.307.437.43-2.62%688,230
Jun 3, 20267.527.867.407.637.635.24%666,450
Jun 2, 20267.967.967.197.257.25-10.27%632,620
Jun 1, 20268.338.647.998.088.08-3.35%595,101
May 29, 20268.318.508.178.368.360.48%499,059
May 28, 20268.248.388.138.328.320.73%320,853
May 27, 20268.198.558.198.268.260.61%420,408
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%597,559
May 20, 20268.028.567.998.418.414.73%593,025
May 19, 20268.428.648.028.038.03-5.64%982,600
May 18, 20268.979.138.128.518.51-6.38%511,345
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
Apr 7, 20269.599.719.319.709.70-0.21%316,827
Apr 6, 20269.499.899.369.729.722.32%502,189
Apr 2, 20269.069.648.979.509.502.04%537,603
Apr 1, 20269.229.358.969.319.313.44%848,779
Mar 31, 20269.019.178.829.009.002.51%1,034,695
Mar 30, 20268.538.788.298.788.781.27%863,154
Mar 27, 20268.729.158.108.678.67-11.44%939,869
Mar 26, 20269.4810.439.389.799.793.38%883,397
Mar 25, 20268.689.578.679.479.4712.07%687,018
Mar 24, 20268.358.628.128.458.45-747,604
Mar 23, 20268.719.038.438.458.45-2.54%743,391
Mar 20, 20268.388.688.168.678.673.46%3,024,871
Mar 19, 20268.448.638.238.388.38-3.29%734,937
Mar 18, 20269.589.708.668.678.67-10.76%719,605
Mar 17, 20269.589.909.179.719.711.04%914,778
Mar 16, 20269.299.689.279.619.614.12%722,622
Mar 13, 20269.329.768.939.239.23-2.17%723,135
Mar 12, 20269.279.478.709.449.440.80%1,135,947
Mar 11, 20268.169.378.169.369.3615.27%1,691,945
Mar 10, 20268.158.367.998.128.120.74%653,690
Mar 9, 20267.658.097.648.068.065.22%1,194,615
Mar 6, 20267.477.777.407.667.66-0.13%702,477
Mar 5, 20267.647.787.407.677.67-1.67%941,753
Mar 4, 20267.378.017.337.807.805.98%1,170,533
Mar 3, 20267.597.647.257.367.36-4.42%998,242
Mar 2, 20267.517.927.467.707.700.26%1,672,780
Feb 27, 20267.878.077.627.687.68-2.78%1,436,021
Feb 26, 20267.748.327.707.907.902.07%1,497,001
Feb 25, 20267.908.107.707.747.74-2.27%987,847
Feb 24, 20268.058.277.787.927.92-1.25%1,538,700
Feb 23, 20268.098.327.748.028.02-0.74%1,625,716
Feb 20, 20268.418.698.018.088.08-5.39%3,597,516
Feb 19, 20268.328.738.148.548.543.02%1,924,110
Feb 18, 20268.188.667.938.298.29-0.48%2,893,163
Feb 17, 20268.699.007.968.338.33-4.80%6,025,969
Feb 13, 202612.6912.698.528.758.75-31.64%6,503,631
Feb 12, 202614.8614.8612.7512.8012.80-12.87%3,879,133
Feb 11, 202619.0020.0112.6514.6914.69-47.18%8,848,205
Feb 10, 202626.1028.5825.9327.8127.816.47%800,791
Feb 9, 202626.2426.2425.1626.1226.12-0.31%509,701
Feb 6, 202626.5627.9825.9426.2026.200.77%517,906
Feb 5, 202629.4030.3125.8726.0026.00-11.50%619,509
Feb 4, 202630.8830.8828.3529.3829.38-4.58%610,504