Upstream Bio, Inc. Share Price
NASDAQ: UPB | Micro CapUpstream Bio, Inc. Stock Performance
Upstream Bio, Inc. Share Price Today
As of 8 October 2026, Upstream Bio, Inc.'s share price is $4.61. The stock opened at $4.54, compared to its previous close of $4.58. During today's trading session, Upstream Bio, Inc.'s share price traded between $4.53 and $4.67, with an average price of $4.60. Over the past 52 weeks, the stock has recorded a high of $33.58 and a low of $4.53. In terms of performance, Upstream Bio, Inc.'s share price has declined by 49.73% over the last six months and is down 82.16% on a year-on-year basis.
Upstream Bio, Inc. Share Price Chart
Upstream Bio, Inc. Quarterly Profit & Loss
All figures in USD
Upstream Bio, Inc. Annual Profit & Loss
All figures in USD
About Upstream Bio, Inc.
Upstream Bio Inc is a clinical-stage biotechnology company developing treatments for inflammatory diseases, with an initial focus on severe respiratory disorders. It is developing verekitug, the known antagonist currently in clinical development that targets the receptor for Thymic Stromal Lymphopoietin (TSLP), a cytokine that is a clinically validated driver of inflammatory response positioned upstream of multiple signaling cascades that affect a variety of immune-mediated diseases. Verekitug has advanced into three separate world-wide, placebo-controlled, randomized Phase 2 clinical trials, two completed in chronic rhinosinusitis with nasal polyps (CRSwNP) and severe asthma, and one ongoing in chronic obstructive pulmonary disease (COPD).
Upstream Bio, Inc. Historical Returns
| Month | Open | Close | Change % |
|---|---|---|---|
Oct 2026 | $5.18 | $4.61 | -12.54% |
Sep 2026 | $6.54 | $5.26 | -22.46% |
Aug 2026 | $6.25 | $6.79 | +7.95% |
Jul 2026 | $6.95 | $6.29 | -9.04% |
Jun 2026 | $8.31 | $6.92 | -17.24% |
May 2026 | $9.21 | $8.36 | -8.89% |
Apr 2026 | $9.22 | $9.17 | +2.23% |
Mar 2026 | $7.58 | $8.97 | +16.64% |
Feb 2026 | $31.66 | $7.69 | -75.25% |
Jan 2026 | $27.09 | $31.07 | +14.29% |
Dec 2025 | $28.32 | $27.18 | -4.71% |
Nov 2025 | $25.84 | $28.53 | +10.41% |
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