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CTX-009

Phase 2

Biliary Tract Cancer | Small molecule | Oncology |Compass Therapeutics, Inc.|Last Updated: May 7, 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
RandomizedACTIVE_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment168
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05506943A Study of CTX-009 in Combination With Paclitaxel in Adult Patients With Unresectable Advanced, Metastatic or Recurrent Biliary Tract Cancers (COMPANION-002)PHASE2 ACTIVE NOT_RECRUITING 168Jan 9, 2023Dec 1, 2026May 7, 202634 United States
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Study Endpoints
Primary Endpoints
Best Overall Response
From randomization to treatment discontinuation for any reason, average 6 months

Percentage of patients whose Best Overall Response (BOR) is assessed as Complete Response (CR) or Partial Response (PR) as assessed by RECIST 1.1

Secondary Endpoints
Progression Free Survival
From randomization to first documented objective PD or death if PD does not occur, average 6 months
Duration of Response
From first confirmed CR or PR to confirmed PD, average 6 months
Overall Survival
From randomization to death from any cause, average 12 months
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Study Design & Arms
AllocationRANDOMIZED
MaskingSINGLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
CTX-009 plus PaclitaxelEXPERIMENTAL -
PaclitaxelACTIVE_COMPARATORPatients randomized to receive paclitaxel only have the option to crossover to the CTX-009 plus paclitaxel arm after documented disease progression per RECIST v1.1.
Interventions
NameTypeDescription
CTX-009DRUGIV infusion on day 1 and 14 of every 28 day cycle
PaclitaxelDRUGIV infusion on day 1, 8, and 15 of every 28 day cycle
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites34

INCLUSION CRITERIA 1. 18 years of age or older 2. Histologically or cytologically confirmed unresectable advanced, metastatic, or recurrent biliary tract cancers (including intrahepatic cholangiocarcinoma, extrahepatic cholangiocarcinoma, gallbladder cancer, and ampullary carcinoma) 3. Patients mus...

Countries:United States
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Recent Changes (Last 90 Days)
MEDIUMMay 26, 2026NCT05506943Enrollment: 150 → 168
LOWMay 24, 2026NCT05506943studyFirstPostDate: changed