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CTX-471

Phase 1

Locally Advanced Solid Tumor | Small molecule | Oncology |Compass Therapeutics, Inc.|Last Updated: Apr 17, 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
CONTROLLEDBiomarker
Total Trials1
Total Enrollment100
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT03881488Study of CTX-471 as a Monotherapy or in Combination With Pembrolizumab in Patients Post PD-1/PD-L1 Inhibitors in Metastatic or Locally Advanced MalignanciesPHASE1 COMPLETED 100May 17, 2019May 21, 2025Apr 17, 202610 United States
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Study Endpoints
Primary Endpoints
Number of participants with dose limiting toxicities (DLTs), treatment-emergent adverse events (TEAEs), and/or changes in clinical laboratory abnormalities
From first dose of CTX-471 (Week 1 Day 1) until 60 days after the last CTX-471 injection (up to 2 years)
Secondary Endpoints
Maximum serum concentration (Cmax) of CTX-471 as a monotherapy and CTX-471 in combination with pembrolizumab
From first dose of CTX-471 (Week 1 Day 1) until 60 days after the last CTX-471 injection (up to 2 years)
Area under the serum concentrations of CTX-471 versus time curve (AUC) for CTX-471 as a monotherapy and CTX-471 in combination with pembrolizumab
From first dose of CTX-471 (Week 1 Day 1) until 60 days after the last CTX-471 injection (up to 2 years)
Half-life (t1/2) of serum concentrations of CTX-471 as a monotherapy and CTX-471 in combination with pembrolizumab
From first dose of CTX-471 (Week 1 Day 1) until 60 days after the last CTX-471 injection (up to 2 years)
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Arm 1 Part 1 Dose EscalationEXPERIMENTALEscalating doses of CTX-471 depending on cohort at enrollment
Arm 1 Part 2 Dose ExpansionEXPERIMENTALTwo dose groups of CTX-471 (0.3 mg/kg and 0.6 mg/kg)
Arm 2 Part 1 Dose EscalationEXPERIMENTALEscalating doses of CTX-471 in combination with pembrolizumab (KEYTRUDA® ) depending on cohort at enrollment
Arm 2 Part 2 Dose ExpansionEXPERIMENTALTwo cohorts of CTX-471 (0.3 mg/kg and 0.6 mg/kg) in combination with pembrolizumab (KEYTRUDA® ) (400 mg) in three tumor type subgroups. Cohort 1 - Group 1A - NSCLC , Group 1B -SCLC and Group 1C - Melanoma. Cohort 2 Group 2A - NSCLC, Group 2B - SCLC and Group 2C -Melanoma.
Interventions
NameTypeDescription
CTX-471DRUGIV infusion every 2 weeks
Pembrolizumab (KEYTRUDA®)DRUGIV infusion every 6 weeks
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites10

Inclusion Criteria: 1. Age 18 years or older 2. Histologically confirmed diagnosis: 1. Monotherapy Arm 1 ( Part 1 and 2): metastatic or locally advanced malignancies 2. Combination Arm 2 Par 1 Dose Escalation: metastatic or locally advanced non-small cell lung, small cell lung cancer, mesoth...

Countries:United States
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