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SRK-439

Phase 1

Healthy | Small molecule | Other |Scholar Rock Holding Corporation|Last Updated: Mar 2, 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-BlindCONTROLLED
Total Trials1
Total Enrollment76
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07444294A Single- and Multiple-Ascending Dose Study of SRK-439 in Healthy AdultsPHASE1 RECRUITING 76Nov 21, 2025Jun 9, 2027Mar 2, 20261 United States
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Study Endpoints
Primary Endpoints
Evaluate the safety and tolerability of single and multiple SRK-439 SC dose administration in healthy adult participants
Up to 32 weeks

• Incidence of AEs

Secondary Endpoints
Evaluate the PK of single and multiple SRK-439 SC dose administration in healthy adult participants
Up to 32 weeks
Evaluate the PD of single and multiple SRK-439 SC dose administration in healthy adult participants
Up to 32 weeks
Evaluate the immunogenicity of single and multiple SRK-439 SC dose administration in healthy adult participants
Up to 32 weeks
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Part AEXPERIMENTALParticipants will be treated with a single dose of SRK-439 or matching placebo.
Part BEXPERIMENTALParticipants will be treated with multiple doses of SRK-439 or matching placebo.
Interventions
NameTypeDescription
PlaceboDRUGMatching placebo to SRK-439, subcutaneous administration
SRK-439DRUGSingle ascending dose, subcutaneous administration
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Eligibility Criteria
Age Range18 Years — 55 Years
SexALL
Healthy VolunteersYes
Study Sites1

Key Inclusion Criteria: 1. Male or female participants, ≥18 to ≤55 years of age, at the time of informed consent 2. BMI of ≥18 kg/m2 to ≤35 kg/m2 (inclusive) at screening Exclusion Criteria: 1. Previous treatment with SRK-439 or apitegromab, or with other anti-myostatin therapies, including ACTR ...

Countries:United States
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT07444294primaryCompletionDate: changed
LOWMay 24, 2026NCT07444294studyFirstPostDate: changed