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Frexalimab

Phase 3

Multiple Sclerosis | Small molecule | Immunology |Sanofi|Last Updated: May 29, 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_CONTROLLEDDMCBiomarker
Total Trials3
Total Enrollment2,758
FDA Designations
No designations recorded
Clinical Trials (3)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07325292Non-inferiority Study of Frexalimab Subcutaneous Administration Compared to Intravenous Administration in Adult Participants With Multiple SclerosisPHASE3 RECRUITING 160Jan 14, 2026Nov 30, 2028May 29, 202632 United States, Belgium +2
NCT06141486Efficacy and Safety Study of Frexalimab (SAR441344) in Adults With Nonrelapsing Secondary Progressive Multiple SclerosisPHASE3 ACTIVE NOT_RECRUITING 943Dec 27, 2023Mar 24, 2028May 14, 2026311 United States, Argentina +25
NCT06141473Efficacy and Safety Studies of Frexalimab (SAR441344) in Adults With Relapsing Forms of Multiple SclerosisPHASE3 ACTIVE NOT_RECRUITING 1,655Dec 13, 2023May 6, 2027May 14, 2026382 United States, Argentina +39
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Study Endpoints
Primary Endpoints
Area under the curve over the interval W20 to W24(part A)
Until Week 24

AUCW20-W24

Trough concentration at steady state(part A)
Until Week 24

Ctrough,SS

Time to onset of composite confirmed disability progression (cCDP) confirmed over 6 months in the double-blind treatment period
Up to 36 months

Defined as Increase from the baseline expanded disability status scale (EDSS) score of ≥1.0 point when the baseline is \<5.5, or ≥0.5 point when the baseline is ≥5.5, OR Increase of ≥20% from the baseline time in the 9 hole peg test (9HPT),OR Increase of ≥20% from the baseline time in the timed 25 foot walk (T25FW) test

Annualized relapse rate (ARR) during the study period assessed by protocol defined adjudicated relapses
Until Week 156

ARR during the study period assessed by protocol-defined adjudicated relapses. This endpoint will be analyzed in the ITT population of each study using a negative binomial model with the total number of adjudicated relapses per participant occurring during the observation period as the response variable and with terms for treatment group, Gd-enhancing T1 lesions at baseline (presence, absence), EDSS strata (\<4, ≥4), and geographical region (US, non-US).

Secondary Endpoints
Frexalimab plasma concentrations over time(part A)
Until Week 24
Pharmacokinetic parameters: Cmax(part A)
Until Week 24
Pharmacokinetic parameters: Tmax(part A)
Until Week 24
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Frexalimab SCEXPERIMENTALFrexalimab SC (home self-administration via on-body delivery system(OBDS), is allowed from the beginning of Part B after appropriate training and participant and Investigator agreement)
Frexalimab IVEXPERIMENTALFrexalimab IV
FrexalimabEXPERIMENTALFrexalimab IV administration
PlaceboPLACEBO_COMPARATORMatching placebo
TeriflunomideACTIVE_COMPARATORParticipants will receive teriflunomide tablet and placebo infusion.
Interventions
NameTypeDescription
FrexalimabDRUGPharmaceutical form:Solution for injection-Route of administration:SC injection
MRI contrast-enhancing preparationsDRUGRoute of administration:IV injection
PlaceboDRUGSolution for IV infusion
MRI contrast-enhancing agentsDRUGIV, as per respective label
TeriflunomideDRUGAubagio oral tablet
Placebo infusionDRUGSolution for IV infusion
Placebo tabletDRUGOral tablet
CholestyramineDRUGoral, 8 g 3 times daily for 11 days for accelerated elimination procedure (4 g 3 times daily for 11 days in case of intolerance). The teriflunomide local label should be followed.
Activated charcoalDRUGoral, 50 g every 12 hours for 11 days for accelerated elimination procedure. The teriflunomide local label should be followed.
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Eligibility Criteria
Age Range18 Years — 60 Years
SexALL
Healthy VolunteersNo
Study Sites32

Inclusion Criteria: The participant must qualify for inclusion per either Group A or B criteria as detailed below, meeting all the inclusion criteria of the applicable group: Group A (RMS) * The participant must be 18 to 55 years of age, inclusive, at the time of signing the informed consent. * T...

Countries:United StatesBelgiumChinaJapanArgentinaAustraliaBrazilBulgariaCanadaChileCzechiaFranceGermanyGreeceHungaryIndiaItalyNetherlandsPolandPortugalSaudi ArabiaSouth KoreaSpainSwedenTurkey (Türkiye)UkraineUnited KingdomAustriaCroatiaDenmarkHong KongIsraelLithuaniaMalaysiaMexicoPuerto RicoRomaniaSingaporeSlovakiaSouth AfricaSwitzerlandTaiwanThailandUnited Arab Emirates
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Recent Changes (Last 90 Days)
LOWMay 29, 2026NCT07325292lastUpdatePostDate: changed
LOWMay 29, 2026NCT07325292lastUpdatePostDate: changed
LOWMay 26, 2026NCT07325292primaryCompletionDate: changed
MEDIUMMay 26, 2026NCT06141473Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMMay 26, 2026NCT06141486Status: RECRUITING → ACTIVE_NOT_RECRUITING
LOWMay 24, 2026NCT07325292studyFirstPostDate: changed
LOWMay 24, 2026NCT06141473studyFirstPostDate: changed
LOWMay 24, 2026NCT06141486studyFirstPostDate: changed