Recent Updates
Recently added Catalysts

VIR-5500

Phase 1

Hormone-refractory Prostate Cancer | Small molecule | Oncology |Vir Biotechnology, Inc.|Last Updated: Jun 4, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
Premium
Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
Premium
Trial Design
CONTROLLEDBiomarker
Total Trials1
Total Enrollment437
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05997615Safety, Pharmacokinetics, and Preliminary Efficacy of VIR-5500 (AMX-500) in Prostate CancerPHASE1 RECRUITING 437Aug 10, 2023Sep 29, 2027Jun 4, 202612 United States, Australia +2
Unlock Drug Trial Details
Study Endpoints
Primary Endpoints
Part 1 and 3a: Number of participants with treatment-emergent Adverse Events (AEs)
from the Cycle 1(each cycle is 21 or 28 days), Day 1 up to approximately 48 months

Incidence and severity of AEs according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE)

Part 1 and 3a: Incidence of Dose Limiting Toxicities (DLTs)
from the Cycle 1(each cycle is 21 or 28 days), Day 1 up to Day 21 or Day 28

Incidence and nature of DLTs according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE)

Part 2 and 4a: Prostate-Specific Antigen (PSA) response rate
from the Cycle 1(each cycle is 21 or 28 days), Day 1 up to approximately 48 months
Part 2 and 4a: Objective Response Rate (ORR)
from the Cycle 1(each cycle is 21 or 28 days), Day 1 up to approximately 48 months
Secondary Endpoints
Part 2 and 4a: Number of participants with Adverse Events (AEs)
from the Cycle 1(each cycle is 21 or 28 days), Day 1 up to approximately 48 months
Part 1 and 3a: PSA response rate
from the Cycle 1(each cycle is 21 or 28 days), Day 1 up to approximately 48 months
Part 1 and 3a: Objective Response Rate (ORR)
from the Cycle 1(each cycle is 21 or 28 days), Day 1 up to approximately 48 months
Unlock Study Endpoints
Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Part 1: VIR-5500 Monotherapy Dose EscalationEXPERIMENTALVIR-5500 will be administered as a monotherapy in patients with mCRPC over a 21-day or 28-day cycle
Part 2: VIR-5500 Monotherapy Dose ExpansionEXPERIMENTALVIR-5500 will be administered as a monotherapy in patients with mCRPC over a 21-day or 28-day cycle
Part 3a: VIR-5500 in combination with an ARSI for Dose EscalationEXPERIMENTALVIR-5500 will be administered in combination with ARSI over a 21-day or 28-day cycle
Part 4a: VIR-5500 in combination with an ARSI for Dose ExpansionEXPERIMENTALVIR-5500 will be administered in combination with ARSI over a 21-day or 28-day cycle
Interventions
NameTypeDescription
VIR-5500DRUGPharmaceutical form: Solution for infusion Route of administration: Intravenous (IV) infusion
ARSICOMBINATION_PRODUCTOral administration
Unlock Study Design Details
Eligibility Criteria
Age Range18 Years — N/A
SexMALE
Healthy VolunteersNo
Study Sites12

Inclusion Criteria: Applicable to Parts 1 and 2 1. Have metastatic disease, defined by ≥ 1 metastatic lesion that is present on baseline computed tomography (CT), magnetic resonance imaging (MRI), or bone scan imaging 2. Have documented progressive mCRPC based on ≥ 1 of the criteria (per PCWG3) ...

Countries:United StatesAustraliaSpainUnited Kingdom
Unlock Eligibility Criteria
Recent Changes (Last 90 Days)
MEDIUMJun 4, 2026NCT05997615Enrollment: 390 → 437
MEDIUMJun 4, 2026NCT05997615Enrollment: 390 → 437
MEDIUMJun 4, 2026NCT05997615Enrollment: 390 → 437
MEDIUMJun 4, 2026NCT05997615Enrollment: 390 → 437
LOWMay 26, 2026NCT05997615primaryCompletionDate: changed
LOWMay 24, 2026NCT05997615studyFirstPostDate: changed