Upstream Bio, Inc. (UPB)

Upstream Bio is a clinical-stage company developing treatments for severe inflammatory respiratory disease. Its lead candidate, verekitug, is a monoclonal antibody that blocks the TSLP receptor—positioned as a distinctive way to interrupt upstream inflammatory signaling rather than only downstream cytokines. Programs target severe asthma, chronic rhinosinusitis with nasal polyps and COPD, aiming at patients whose disease remains poorly controlled on standard care.

Market
Nasdaq
Sector
Healthcare
Trend
Strong downtrend
Last close
6.01 (-1.15% on the day)
MA50
6.93
MA200
13.89
52-week range
5.92–32.6
Market cap
362.6M USD
Dividend yield
0%
Data as of
2026-09-04
Quarterly revenue and earnings, millions
QuarterRevenueYoY %EarningsYoY %
Q1 20250.6-27.3
Q2 20250.9-40
Q3 20250.7-33.8
Q4 20250.7-42.5
Q1 2026182.7%-40.6

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