Clinical-stage oncolytic immunotherapy

The next step in oncolytic immunotherapy

KaliVir is developing VET3-TGI, a multi-mechanistic oncolytic immunotherapy engineered to overcome immune resistance in cancers that no longer respond to checkpoint inhibitors.

KaliVir scientist working with samples in the laboratory

Our mission

Most patients with advanced cancer never respond to checkpoint inhibitors, or relapse after they do. We’re building a new class of oncolytic immunotherapy for them.

Illustration of a VET virus and its engineered genome

How VET3-TGI works

Three complementary mechanisms, one therapy

1

Destroy tumor cells

Tumor-selective replication destroys cancer cells and releases antigens and danger signals, designed to turn “cold” tumors “hot.”

2

Counter immune suppression

A novel TGF-β inhibitor is designed to remodel the tumor microenvironment and reopen tumors to immune cells.

3

Activate T cells

Local IL-12 expression is designed to drive potent, synergistic T-cell activation.

Pipeline

One platform, multiple solid tumors

One scalable platform, led by VET3-TGI, in development by intratumoral and intravenous delivery, alone and with atezolizumab.

Merkel cell carcinoma
Phase 1b
Advanced melanoma
Phase 1b
CPI-resistant and refractory solid tumors
Phase 1
Solid tumors, intravenous
Phase 1
VET6-PDI · advanced or metastatic solid tumors
Preclinical
ASP1012 · partnered with Astellas Pharma
Phase 1
Pipetting samples in the laboratory

Careers

Work on therapies for patients who’ve run out of options

Press release
November 6, 2026

KaliVir Immunotherapeutics Reports 71% Objective Response Rate in Patients with Advanced, Cutaneous Malignancies in Phase 1/1b STEALTH-001 Trial

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Press release
August 19, 2026

KaliVir Immunotherapeutics Announces Closing of $14 Million Series A Extension Financing

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Press release
November 19, 2025

KaliVir Immunotherapeutics Announces Clinical Trial Collaboration and Supply Agreement with Roche to Evaluate VET3-TGI in Combination with Atezolizumab (Tecentriq®) in Advanced Solid Tumors

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