NASDAQ:UPB | Stock Price History | Upstream Bio, Inc.

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
2024-10-11 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$5.62$8.07$11.58$16.62$23.85$34.232024-10-112026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

Historical Stock Price

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2026-09-04$6.0734,482
2026-09-03$6.3075,062
2026-09-02$6.6424,827
2026-09-01$6.5924,569
2026-08-31$6.7727,635
2026-08-28$6.7131,790
2026-08-27$6.79$6.79335,100$7.0818,949
2026-08-26$7.13$7.13432,900$7.0237,797
2026-08-25$7.18$7.18554,300$6.5751,022
2026-08-24$6.61$6.61538,500$6.8635,927
2026-08-21$6.97$6.97434,200$6.9846,918
2026-08-20$6.85$6.85592,900$7.5446,289
2026-08-19$7.52$7.52574,100$6.9926,209
2026-08-18$6.85$6.85461,600$7.2429,125
2026-08-17$7.14$7.14852,400$7.01116,501
2026-08-14$7.07$7.07688,200$6.9267,142
2026-08-13$6.91$6.91378,800$6.9823,681
2026-08-12$6.91$6.91635,100$6.9062,397
2026-08-11$7.09$7.09628,100$7.4448,780
2026-08-10$7.44$7.44869,600$7.3878,196
2026-08-07$7.25$7.25621,800$7.0362,832
2026-08-06$6.87$6.87427,200$6.8127,004
2026-08-05$6.74$6.74917,300$6.8092,558
2026-08-04$6.79$6.791,362,500$6.67132,613
2026-08-03$6.42$6.42774,300$6.2467,414
2026-07-31$6.31$6.31297,700$6.5416,169
2026-07-30$6.57$6.57320,600$6.4516,008
2026-07-29$6.41$6.41702,800$6.4340,370
2026-07-28$6.40$6.40433,200$6.3927,179
2026-07-27$6.40$6.40459,500$6.4736,383
2026-07-24$6.41$6.41626,400$6.4194,078
2026-07-23$6.40$6.40626,100$6.4443,569
2026-07-22$6.59$6.59704,500$7.0364,533
2026-07-21$6.98$6.98341,000$6.9143,944
2026-07-20$6.98$6.98458,000$6.9937,681
2026-07-17$7.01$7.01378,000
2026-07-16$7.23$7.23561,200
2026-07-15$7.27$7.27332,100
2026-07-14$7.14$7.14344,700
2026-07-13$7.28$7.28266,100
2026-07-10$7.53$7.53341,700
2026-07-09$7.81$7.81467,500
2026-07-08$7.98$7.98635,100
2026-07-07$7.86$7.86809,500
2026-07-06$7.40$7.40357,000
2026-07-02$7.51$7.51363,200
2026-07-01$7.28$7.28561,000
2026-06-30$6.92$6.92557,800
2026-06-29$6.93$6.93662,700
2026-06-26$6.75$6.751,311,200
2026-06-25$6.36$6.36469,900
2026-06-24$6.35$6.35654,600
2026-06-23$6.32$6.32623,900
2026-06-22$6.30$6.30849,200
2026-06-18$6.25$6.25829,700
2026-06-17$6.15$6.15839,800
2026-06-16$5.92$5.92519,900
2026-06-15$6.10$6.10681,400
2026-06-12$6.10$6.101,432,200
2026-06-11$6.38$6.38833,100
2026-06-10$6.28$6.28450,100
2026-06-09$6.69$6.69500,500
2026-06-08$6.45$6.45783,900
2026-06-05$7.05$7.05672,400
2026-06-04$7.43$7.43688,200
2026-06-03$7.63$7.63666,400
2026-06-02$7.25$7.25632,600
2026-06-01$8.08$8.08595,100
2026-05-29$8.36$8.36499,100
2026-05-28$8.32$8.32320,800
2026-05-27$8.26$8.26420,400
2026-05-26$8.21$8.21593,000
2026-05-22$8.37$8.37354,400
2026-05-21$8.46$8.46597,500
2026-05-20$8.41$8.41593,000
2026-05-19$8.03$8.03982,500
2026-05-18$8.51$8.51511,300
2026-05-15$9.09$9.09979,900
2026-05-14$8.79$8.79568,800
2026-05-13$9.36$9.36815,600
2026-05-12$8.95$8.95467,500
2026-05-11$9.11$9.11618,900
2026-05-08$9.09$9.09456,000
2026-05-07$8.99$8.99272,800
2026-05-06$9.19$9.19409,200
2026-05-05$9.12$9.12262,700
2026-05-04$9.31$9.31300,400
2026-05-01$9.40$9.40489,700
2026-04-30$9.18$9.18395,000
2026-04-29$9.19$9.19415,800
2026-04-28$9.51$9.51474,600
2026-04-27$9.29$9.29664,700
2026-04-24$9.30$9.30558,800
2026-04-23$9.60$9.60428,000
2026-04-22$9.64$9.64624,800
2026-04-21$9.26$9.26527,000
2026-04-20$9.99$9.99387,900
2026-04-17$9.99$9.99661,400
2026-04-16$10.10$10.101,152,800
2026-04-15$9.88$9.88552,100