Upstream Bio, Inc., a clinical-stage biotechnology company, develops treatments for inflammatory diseases focusing on severe respiratory disorders. It offers verekitug, which is in Phase 2 clinical development for the treatment of severe asthma and chronic rhinosinusitis with nasal polyps, and in Phase I clinical trial for treating chronic obstructive pulmonary disease. The company was incorporated in 2021 and is headquartered in Waltham, Massachusetts. Show more

Location: 890 Winter Street, Waltham, MA, 02451, United States | Website: https://upstreambio.com | Industry: Biotechnology | Sector: Healthcare

Market Cap

1.531B

52 Wk Range

$5.14 - $33.00

Previous Close

$28.33

Open

$29.09

Volume

795,855

Day Range

$28.36 - $30.27

Enterprise Value

1.16B

Cash

372.4M

Avg Qtr Burn

-30.56M

Insider Ownership

14.77%

Institutional Own.

87.46%

Qtr Updated

09/30/25

Drug Pipeline

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Drug & Indication	Stage & Event	Catalyst Date
Verekitug Details Chronic Obstructive Pulmonary Disease (COPD)	Phase 2 Data readout	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
Verekitug Details Severe asthma	Phase 2 Data readout	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.
Verekitug Details Chronic Rhinosinusitis with Nasal Polyps (CRSwNP)	Phase 2 Update	Some catalyst date You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details. You must sign up to see the catalyst details.Sign up now.