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VIR-5525

Phase 1

Solid Tumor Malignancies | Small molecule | Oncology |Vir Biotechnology, Inc.|Last Updated: Apr 13, 2026

Target and mechanism

Molecular targetEGFR
Target classProtein
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment450

FDA Designations

No designations recorded

Clinical trial landscape

VIR-5525 · 1 trial · 3 indications

Phase 1 1
NCT06960395Safety and Preliminary Efficacy of VIR-5525 and VIR-5525 + Pembrolizumab in Participants With Locally Advanced or Metastatic Solid TumorsSolid Tumor Malignancies
RECRUITING450 Analytics
PHASE1RECRUITING
Safety and Preliminary Efficacy of VIR-5525 and VIR-5525 + Pembrolizumab in Participants With Locally Advanced or Metastatic Solid Tumors
Solid Tumor MalignanciesUnlock trial analytics

Study Endpoints

Primary Endpoints

Primary Safety Objectives (Parts 1 and 3)
From Cycle 1, Day 1 (each cycle is 21 days), up to approximately 52 months.

Objective: To evaluate the safety and tolerability of escalating doses of VIR-5525 as monotherapy (Part 1) and in combination with pembrolizumab (Part 3). Endpoint: Incidence and severity of AEs, including DLTs, with severity determined according to NCI CTCAE v5.0, ASTCT CRS, or ASTCT ICANS Consensus Grading, as appropriate.

Primary Efficacy Objectives (Parts 2 and 4)
From Cycle 1, Day 1 (each cycle is 21 days), up to approximately 52 months.

Objective: To evaluate the preliminary anti-tumor activity of VIR-5525 as monotherapy (Part 2) and in combination with pembrolizumab (Part 4) at the recommended dose(s) for expansion cohorts. Endpoint: Objective response, defined as a CR or PR per RECIST v1.1.

Secondary Endpoints

Secondary Safety Objectives (Parts 1 and 3)
From Cycle 1, Day 1 (each cycle is 21 days), up to approximately 52 months.
Secondary Efficacy Objectives (Parts 1 and 3)
From Cycle 1, Day 1 (each cycle is 21 days), up to approximately 52 months.
Secondary Efficacy Objectives (Parts 2 and 4)
From Cycle 1, Day 1 (each cycle is 21 days), up to approximately 52 months.
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part 1: VIR-5525 Monotherapy Dose EscalationEXPERIMENTALScreening Period: Up to 28 days Treatment Period: Once successfully screened, enrolled participants may receive study intervention of VIR-5525 in monotherapy.
Part 2: VIR-5525 Monotherapy Dose ExpansionEXPERIMENTALScreening Period: Up to 28 days Treatment Period: Once successfully screened, enrolled participants may receive study intervention of VIR-5525 in monotherapy.
Part 3: VIR-5525 Combination Dose EscalationEXPERIMENTALScreening Period: Up to 28 days Treatment Period: Once successfully screened, enrolled participants may receive study intervention of VIR-5525 in combination with pembrolizumab.
Part 4: VIR-5525 Combination Dose ExpansionEXPERIMENTALScreening Period: Up to 28 days Treatment Period: Once successfully screened, enrolled participants may receive study intervention of VIR-5525 in combination with pembrolizumab.

Interventions

NameTypeDescription
VIR-5525DRUGPharmaceutical Form: Solution for Infusion Route of Administration: Intravenous (IV) infusion
PembrolizumabDRUGPharmaceutical Form: Solution for Infusion Route of Administration: Intravenous (IV) infusion
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites4

Inclusion Criteria: I 01. Are ≥ 18 years of age, or at the country's legal age of majority of the legal adult age is \>18 years, at the time of signing the ICF. I 02. Have an ECOG performance status of 0 to 1. I 03. Have a life expectancy of at least 12 weeks. I 04. Have histological, pathologic...

Countries:United StatesAustralia
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Frequently asked questions about VIR-5525

What is VIR-5525 used for?

VIR-5525 is an investigational small molecule being developed for the treatment of solid tumor malignancies, specifically EGFR positive solid tumors. It is currently in Phase 1 clinical development and has not been approved by the FDA.

What does VIR-5525 target?

VIR-5525 targets EGFR, a protein involved in cell growth and survival that is often overexpressed in certain solid tumors. By targeting EGFR, VIR-5525 aims to interfere with tumor growth pathways in EGFR positive malignancies.

Who makes VIR-5525?

VIR-5525 is being developed by Vir Biotechnology, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol VIR. The company is conducting clinical trials to evaluate the safety and efficacy of VIR-5525 in patients with advanced solid tumors.

What phase is VIR-5525 in?

VIR-5525 is in Phase 1 clinical development. It is an investigational drug, meaning it has not yet been approved by regulatory authorities. The ongoing Phase 1 trial is recruiting participants to assess its safety and preliminary efficacy.

What clinical trials is VIR-5525 in?

VIR-5525 is being studied in a Phase 1 clinical trial with the identifier NCT06960395. This trial evaluates VIR-5525 alone and in combination with pembrolizumab in participants with locally advanced or metastatic solid tumors. The study is recruiting up to 450 participants in the United States and Australia.

Is VIR-5525 the same as pembrolizumab?

No, VIR-5525 is not the same as pembrolizumab. VIR-5525 is a small molecule targeting EGFR, while pembrolizumab is an immunotherapy that targets PD-1. In the ongoing clinical trial, VIR-5525 is being tested both alone and in combination with pembrolizumab.