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XmAb942

Phase 1

Ulcerative Colitis (UC) | Monoclonal antibody | Immunology |Xencor, Inc.|Last Updated: May 6, 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 Enrollment270
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06619990Study of XmAb942 in Healthy Participants and Participants With Ulcerative ColitisPHASE1 RECRUITING 270Oct 10, 2024Jan 1, 2029May 6, 202657 United States, Australia +10
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Study Endpoints
Primary Endpoints
Incidence, nature, and severity of treatment emergent adverse events (TEAEs) and serious adverse events (SAEs) of XmAb942 in healthy volunteers (Part A)
20 weeks
Incidence, nature, and severity of treatment emergent adverse events (TEAEs) and serious adverse events (SAEs) of XmAb942 in healthy volunteers (Part B)
28 weeks
Clinical remission based on modified mayo score (MMS), defined as MMS ≤ 2 with Mayo endoscopic score (MES) of 1, rectal bleeding subscore (RBS) of 0, and stool frequency subscore (SFS) of 0-1.
12 weeks

A composite score of ulcerative colitis (UC) disease activity on a scale of increasing severity from 0-9. It is calculated by adding the results from Mayo endoscopic subscore (MES) which measures GI bleeding, stool frequency subscore (SFS) which measures stool frequency per day, and rectal bleeding subscore (RBS), which measures presence of blood during stool passing. Each subscore is a scale of increasing severity from 0 to 3.

Secondary Endpoints
Serum PK parameters of XmAb942 in Healthy Volunteers (Part A)
up to 20 weeks
Serum PK parameters of XmAb942 in Healthy Volunteers (Part B)
up to 28 weeks
Incidence and severity of treatment emergent adverse events (TEAEs) and serious adverse events (SAEs) (Part C)
72 weeks
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Study Design & Arms
AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Part A: Active drugACTIVE_COMPARATORActive XmAb942 to be administered to healthy volunteers. Single administration of 3 ascending dose (SAD) levels of XmAb942 via SC (3 cohorts) or IV (3 cohorts) administration in 8 participants per cohort, randomized in a 3:1 ratio to active or placebo.
Part A: PlaceboPLACEBO_COMPARATORPlacebo Comparator to be administered to healthy volunteers. Single administration of 3 ascending dose (SAD) levels will be randomized in a 3:1 ratio to active or placebo.
Part B: ActiveACTIVE_COMPARATORActive XmAb942 to be administered to healthy volunteers. Multiple administrations of 2 ascending dose (MAD) levels of XmAb942 via IV administration in 8 participants per cohort, randomized in a 3:1 ratio to active or placebo.
Part B: PlaceboPLACEBO_COMPARATORPlacebo Comparator to be administered to healthy volunteers. Multiple administrations of 2 ascending dose (MAD) levels will be randomized in a 3:1 ratio to active or placebo.
Part C: ActiveACTIVE_COMPARATORActive XmAb942 to be administered to participants with moderately to severely active Ulcerative Colitis
Part C: placeboPLACEBO_COMPARATORPlacebo comparator to be administered to participants with moderately to severely active Ulcerative Colitis
Interventions
NameTypeDescription
XmAb942BIOLOGICALAntibody
PlaceboDRUGPlacebo
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Eligibility Criteria
Age Range18 Years — 75 Years
SexALL
Healthy VolunteersYes
Study Sites57

Inclusion Criteria: Parts A and B * Age 18-55 * Must be in good health with no significant medical history * Clinical laboratory values within normal range * BMI 18-35 (inclusive) * Contraceptive use by men or women consistent with local regulations * Able and willing to provide written informed c...

Countries:United StatesAustraliaBulgariaCanadaCroatiaGeorgiaGreeceHungaryMoldovaPolandRomaniaUkraine
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT06619990primaryCompletionDate: changed
LOWMay 24, 2026NCT06619990studyFirstPostDate: changed