third-rock-ventures
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Merida Biosciences
Merida Biosciences is a Cambridge, Massachusetts biotechnology company developing a new class of engineered Fc biotherapeutics that selectively bind and eliminate the disease-causing antibodies behind autoimmune and allergic diseases, while sparing the protective antibodies the immune system needs. Launched publicly in April 2025 with a $121 million Series A, the company aims to treat conditions such as Graves' disease, IgE-mediated allergy and primary membranous nephropathy by clearing pathogenic antibodies and suppressing the B cells that make them - without the broad immunosuppression that limits many existing therapies.
Marea Therapeutics
Marea Therapeutics is a clinical-stage biotechnology company in San Francisco developing first-in-class medicines for cardioendocrine and cardiometabolic diseases. Incubated by Third Rock Ventures and led by Dr. Josh Lehrer, Marea uses human genetics insights to drive its pipeline, headlined by MAR001, an ANGPTL4-targeting antibody aimed at residual cardiovascular risk, and MAR002 for acromegaly.
Trace Neuroscience
Trace Neuroscience is a South San Francisco biopharmaceutical company developing genomic medicines for neurodegenerative diseases, starting with ALS. Its lead program, TRCN-1023, is an antisense oligonucleotide designed to restore UNC13A protein function - a target genetically validated in roughly 97% of people living with ALS - by correcting the faulty RNA splicing caused by TDP-43 dysfunction. The company launched in November 2024 with a $101 million Series A led by Third Rock Ventures and entered the clinic in 2026.
MOMA Therapeutics
MOMA Therapeutics is a Cambridge, Massachusetts biotech building precision small-molecule medicines against 'molecular machines' - the highly dynamic, shape-shifting enzymes (ATPases, GTPases and related proteins) that power cellular processes and underlie cancer and other diseases. Spun out of Third Rock Ventures in 2020 by four academic leaders in protein biophysics and structural biology, MOMA's proprietary KNOMATIC platform fuses deep structural insight, advanced hit-finding (fragment and DNA-encoded library screening) and machine-learning-driven lead optimization to drug targets long considered intractable. The company has raised about $236M, advanced its first oncology program into the clinic, and partnered with Roche and Bayer.