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Verekitug

Phase 2

Severe Asthma | Small molecule | Respiratory |Upstream Bio, Inc.|Last Updated: May 14, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindCONTROLLEDDMCBiomarker
Total Trials2
Total Enrollment875
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06966479A Long-Term Safety and Efficacy Study of Verekitug (UPB-101) in Adult Participants With Severe Asthma (VALOUR)PHASE2 ACTIVE NOT_RECRUITING 396May 21, 2025Sep 1, 2027May 14, 2026102 United States, Argentina +13
NCT06196879A Study to Investigate the Efficacy and Safety of Verekitug (UPB-101) in Adult Participants With Severe Asthma (VALIANT)PHASE2 COMPLETED 479Feb 27, 2024Mar 19, 2026May 1, 2026155 United States, Argentina +13
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Study Endpoints
Primary Endpoints
Number of Participants with Adverse Events (AEs) and Serious Adverse Events (SAEs)
From VALOUR baseline up to Week 64

An AE is any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. SAE is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly.

Annual Asthma Exacerbation Rate (AAER)
Baseline up to Week 60

An asthma exacerbation is defined as a worsening of asthma that required treatment with systemic (oral or intravenous) corticosteroids for at least three consecutive days or a single depo-injectable dose of corticosteroids or an emergency room (ER) or urgent care visit that required systemic corticosteroids or an admission to an inpatient facility and/or evaluation and treatment in a healthcare facility for greater than or equal to 24 hours.

Secondary Endpoints
Annualized Asthma Exacerbation Rate (AAER)
From VALOUR baseline up to Week 60
Change from LTE Baseline in Forced Expiratory Volume in 1 Second (FEV1)
From VALOUR baseline to Week 60
Change from LTE Baseline in Fractional Exhaled Nitric Oxide (FeNO)
From VALOUR baseline up to Week 60
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Verekitug 100 mg Q12W and PlaceboEXPERIMENTALParticipants will receive 0.5 mL of verekitug (100 mg) and 2.0 mL of matching placebo, subcutaneous (SC) injections, every 12 weeks (Q12W) for up to 48 weeks.
Verekitug 400 mg Q24W and PlaceboEXPERIMENTALParticipants will receive 2.0 mL of verekitug (400 mg) and 0.5 mL of matching placebo, SC injections, at Weeks 24 and 48 visits. Participants will also receive 2.0 mL and 0.5 mL of placebo subcutaneously in two separate injections at Weeks 12 and 36 visits.
Verekitug (UPB-101): 100 mg Q12W / PlaceboEXPERIMENTALParticipants will receive 0.5 milliliter (mL) of verekitug (UPB-101) formulated solution (containing 100 milligrams \[mg\] of verekitug \[UPB-101\]) and 2.0 mL of placebo subcutaneously in two separate injections every 12 weeks up to Week 48.
Verekitug (UPB-101): 400 mg Q24W / PlaceboEXPERIMENTALParticipants will receive 2.0 mL of verekitug (UPB-101) formulated solution (containing 400 mg of verekitug \[UPB-101\]) and 0.5 mL of placebo subcutaneously in two separate injections every 24 weeks up to Week 48. Participants will also receive 2 mL and 0.5 mL of placebo subcutaneously in two separate injections at Weeks 12 and 36 visits.
Verekitug (UPB-101): 100 mg Q24W / PlaceboEXPERIMENTALParticipants will receive 0.5 mL of verekitug (UPB-101) formulated solution (containing 100 mg of verekitug \[UPB-101\]) and 2.0 mL of placebo subcutaneously in two separate injections every 24 weeks up to Week 48. Participants will also receive 2 mL and 0.5 mL of placebo subcutaneously in two separate injections at Weeks 12 and 36 visits.
PlaceboPLACEBO_COMPARATORParticipants will receive 0.5 mL of matching placebo and 2.0 mL of matching placebo subcutaneously in two separate injections every 12 weeks up to Week 48.
Interventions
NameTypeDescription
VerekitugDRUGVerekitug subcutaneous injection.
PlaceboDRUGVerekitug matching placebo.
Verekitug (UPB-101)DRUGVerekitug (UPB-101) formulated solution
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites102

Inclusion Criteria: 1. Completion of the VALIANT study (UPB-CP-04 \[NCT06196879\]) per protocol. 2. Participant has signed, dated, and received a copy of the Institutional Review Board (IRB)/Independent Ethics Committee (IEC)-approved written informed consent form (ICF) for the LTE study. 3. Contra...

Countries:United StatesArgentinaBulgariaCanadaChileCzechiaGermanyItalyJapanPolandSouth AfricaSouth KoreaSpainUkraineUnited Kingdom
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Recent Changes (Last 90 Days)
MEDIUMJun 1, 2026NCT06196879TRIAL_REMOVED: changed
MEDIUMJun 1, 2026NCT06196879TRIAL_REMOVED: changed
MEDIUMJun 1, 2026NCT06196879TRIAL_REMOVED: changed
MEDIUMMay 26, 2026NCT06966479Status: RECRUITING → ACTIVE_NOT_RECRUITING
HIGHMay 26, 2026NCT06196879Status: ACTIVE_NOT_RECRUITING → COMPLETED
LOWMay 24, 2026NCT06966479studyFirstPostDate: changed
LOWMay 24, 2026NCT06196879studyFirstPostDate: changed