t-cell-engagers
(3)
CytomX Therapeutics
CytomX Therapeutics is a clinical-stage, oncology-focused biopharmaceutical company in South San Francisco that engineers conditionally activated antibody therapeutics through its proprietary PROBODY platform. By masking a drug's binding site and unmasking it only in the tumor microenvironment - where specific proteases cut a cleavable linker - CytomX aims to hit cancer targets that are otherwise too toxic to drug, widening the therapeutic window for antibody-drug conjugates, T-cell engagers and cytokines. Its wholly owned pipeline is led by CX-2051, an EpCAM-targeting PROBODY ADC for metastatic colorectal cancer, alongside masked interferon CX-801 and T-cell engager CX-904, and it partners its technology with Amgen, Astellas, Bristol Myers Squibb, Moderna and Regeneron.
Clasp Therapeutics
Clasp Therapeutics is a clinical-stage immuno-oncology company building off-the-shelf, antibody-like T cell engagers that target cancer driver mutations presented on tumor cells via HLA. Spun out of Johns Hopkins and co-founded by cancer-genetics pioneer Bert Vogelstein and immunotherapy leader Drew Pardoll, Clasp uses its proprietary pHLAre platform to redirect a patient's own T cells to kill tumors with what the company calls absolute specificity - hitting mutant peptides found only on cancer cells while sparing healthy tissue. The company launched publicly in March 2024 with a $150 million Series A and dosed its first patient in April 2025.
Crossbow Therapeutics, Inc.
Crossbow Therapeutics is a Cambridge, Massachusetts biotechnology company building a new class of cancer immunotherapies. Its T-Bolt platform engineers TCR-mimetic antibodies - T-cell engagers that recognize tiny peptide fragments displayed on a cancer cell's surface (peptide-HLA complexes), opening up intracellular proteins that conventional antibodies cannot reach. The lead program, CBX-250, is a first-in-class T-cell engager in a Phase 1 trial for relapsed or refractory myeloid malignancies. Backed by more than $157M in venture funding, Crossbow aims to expand the universe of targetable cancer antigens.