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taldefgrobep alfa

Phase 3

Spinal Muscular Atrophy | Small molecule | Neurology |Biohaven Ltd.|Last Updated: Jun 1, 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-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment269
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05337553A Study to Evaluate the Efficacy and Safety of Taldefgrobep Alfa in Participants With Spinal Muscular AtrophyPHASE3 ACTIVE NOT_RECRUITING 269Jul 6, 2022Dec 1, 2027Jun 1, 202653 United States, Belgium +7
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Study Endpoints
Primary Endpoints
Efficacy of taldefgrobep alfa compared to placebo in change in the 32 item Motor Function Measure (MFM-32) total score
Baseline to Week 48

Change in MFM-32 total score from baseline to Week 48. Scores range from 0-3 on each item. The scores from the 32 items are summed and transformed to a 0-100 scale, with higher scores reflecting higher levels of functional abilities.

Secondary Endpoints
Efficacy of taldefgrobep alfa compared to placebo in change in the Revised Upper Limb Module (RULM) score
Baseline to Week 48
Efficacy of taldefgrobep alfa compared to placebo in change in the Revised Hammersmith Scale (RHS)
Baseline to Week 48
Change from Baseline in lean body mass
Baseline, Week 48
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
taldefgrobep alfaEXPERIMENTALtaldefgrobep alfa - Double-blind (DB) Phase: Participants receive weight based 35 mg/50 mg weekly subcutaneous injection for 48-week DB phase. taldefgrobep alfa/taldefgrobep alfa - Extension Phase: Participants receive weight based 35 mg/50 mg weekly subcutaneous injection for Open label Extension (OLE) phase.
PlaceboPLACEBO_COMPARATORPlacebo - Double-blind (DB) Phase: Participants receive weight based 35 mg/50 mg weekly subcutaneous injection for 48-week DB phase. Placebo/taldefgrobep alfa - Extension Phase: Participants who receive placebo during DB phase, receive weight based 35 mg/50 mg weekly subcutaneous taldefgrobep alfa injection for OLE phase.
Interventions
NameTypeDescription
taldefgrobep alfaDRUGDB Phase: 35 mg/50 mg weekly subcutaneous injection
PlaceboDRUGDB Phase: matching placebo 35 mg/50 mg weekly subcutaneous injection
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Eligibility Criteria
Age Range4 Years — 21 Years
SexALL
Healthy VolunteersNo
Study Sites53

Key Inclusion Criteria: * Spinal Muscular Atrophy confirmed by genetic diagnosis of 5q-autosomal recessive SMA as well as SMN2 copy number * Ambulant or Non-Ambulant * Treated with an SMA disease-modifying therapy and anticipated to remain on that same treatment regimen and dose throughout the tria...

Countries:United StatesBelgiumCzechiaGermanyItalyNetherlandsPolandSpainUnited Kingdom
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Recent Changes (Last 90 Days)
MEDIUMJun 2, 2026NCT05337553Completion: 2026-06 → 2027-12
MEDIUMJun 2, 2026NCT05337553Completion: 2026-06 → 2027-12
MEDIUMJun 2, 2026NCT05337553Completion: 2026-06 → 2027-12
LOWMay 26, 2026NCT05337553primaryCompletionDate: changed
LOWMay 24, 2026NCT05337553studyFirstPostDate: changed