Upstream Bio Inc (UPB)

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Upstream Bio Inc Stock (UPB) Price History

The historical daily chart and data for Upstream Bio Inc stock (UPB), show that the latest closing stock price as of June 18, 2026, is $6.25.

Upstream Bio Inc all-time high stock price is $33.68, occurred on January 14, 2026.
The lowest Upstream Bio Inc stock price recorded was $5.14 on April 09, 2025. Since then, Upstream Bio Inc's stock price has risen over 21.60% to $6.25 now.
The 52-week high stock price for UPB is $33.68, representing a 438.88% increase from the current share price, occurred on January 14, 2026.
The 52-week low stock price for UPB is $5.85, indicating a -6.40% decrease from the current share price, occurred on June 12, 2026.

The table below shows more information about UPB historical price data:

Daily

Weekly

Monthly

30D

60D

YTD

Date	High	Low	High - Low	Volume	% Change
Jun 18, 2026	$6.52	$6.14	$0.375	828,997.0	+1.63%
Jun 17, 2026	$6.33	$5.88	$0.45	839,681.0	+3.89%
Jun 16, 2026	$6.18	$5.86	$0.325	519,856.0	-2.95%
Jun 15, 2026	$6.28	$6.01	$0.27	681,421.0	+0.00%
Jun 12, 2026	$6.47	$5.85	$0.62	1,431,987.0	-4.39%
Jun 11, 2026	$6.40	$6.11	$0.29	833,080.0	+1.59%
Jun 10, 2026	$6.80	$6.25	$0.5508	448,504.0	-6.13%
Jun 09, 2026	$6.78	$6.42	$0.365	500,520.0	+3.72%
Jun 08, 2026	$7.16	$6.41	$0.755	783,876.0	-8.51%
Jun 05, 2026	$7.45	$6.98	$0.47	672,310.0	-5.11%
Jun 04, 2026	$7.78	$7.30	$0.48	688,030.0	-2.62%
Jun 03, 2026	$7.86	$7.40	$0.46	666,432.0	+5.24%
Jun 02, 2026	$7.96	$7.18	$0.775	632,055.0	-10.27%
Jun 01, 2026	$8.64	$7.99	$0.65	595,059.0	-3.35%
May 29, 2026	$8.50	$8.16	$0.335	498,901.0	+0.48%
May 28, 2026	$8.38	$8.13	$0.245	320,803.0	+0.73%
May 27, 2026	$8.55	$8.19	$0.365	420,395.0	+0.61%
May 26, 2026	$8.45	$8.11	$0.345	593,003.0	-1.91%
May 22, 2026	$8.69	$8.33	$0.36	354,422.0	-1.06%
May 21, 2026	$8.60	$8.25	$0.345	597,539.0	+0.59%
May 20, 2026	$8.56	$7.99	$0.57	593,019.0	+4.73%

Upstream Bio Inc Stock (UPB) Year by Year Price History

In this detailed analysis, we present a comprehensive overview of the price movements of Upstream Bio Inc stock over the years. By exploring the year-by-year data, investors can gain valuable insights into the historical performance and volatility of UPB shares. From significant milestones and fluctuations to notable trends, this in-depth examination of Upstream Bio Inc stock price history provides a foundation for understanding how the company's stock has evolved over time.

Upstream Bio Inc Stock (UPB) Price History 2026

Month	High	Low	High - Low	Volume	% Change
Jun, 2026	$8.64	$5.85	$2.79	10,950,805.0	-25.24%
May, 2026	$9.60	$7.99	$1.61	10,271,388.0	-8.93%
Apr, 2026	$10.67	$8.96	$1.71	12,113,945.0	+2.00%
Mar, 2026	$10.43	$7.25	$3.18	22,603,021.0	+17.19%
Feb, 2026	$32.38	$7.62	$24.76	44,951,937.0	-75.29%
Jan, 2026	$33.68	$25.00	$8.68	12,435,765.0	+14.48%

Upstream Bio Inc Stock (UPB) Price History 2025

Month	High	Low	High - Low	Volume	% Change
Dec, 2025	$30.89	$24.61	$6.28	12,118,113.0	-4.48%
Nov, 2025	$33.00	$21.98	$11.02	8,784,413.0	+10.64%
Oct, 2025	$26.90	$18.05	$8.85	8,125,871.0	+37.43%
Sep, 2025	$21.03	$15.55	$5.48	12,893,529.0	+9.81%
Aug, 2025	$19.37	$14.21	$5.16	9,057,642.0	+11.89%
Jul, 2025	$16.15	$10.54	$5.61	8,863,349.0	+39.44%
Jun, 2025	$12.10	$9.25	$2.85	10,827,671.0	+18.96%
May, 2025	$9.90	$7.79	$2.11	8,016,902.0	-0.32%
Apr, 2025	$10.50	$5.14	$5.36	6,329,494.0	+51.31%
Mar, 2025	$10.08	$6.12	$3.96	5,002,930.0	-22.82%
Feb, 2025	$10.65	$6.65	$4.00	4,866,797.0	-26.37%
Jan, 2025	$18.95	$9.29	$9.66	4,964,040.0	-34.49%