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RA Capital Management

North America, Massachusetts, United States, Boston

Description

RA Capital Management is a leading investment advisor with a specialized focus on the life sciences and drug development sectors. Based in Boston, the firm is renowned for its deep scientific expertise and its comprehensive investment strategy, which spans from early-stage private companies to publicly traded equities. RA Capital's approach is characterized by rigorous due diligence into the underlying science and a long-term commitment to fostering innovation in areas such as biotechnology, pharmaceuticals, and medical devices. They aim to identify and support companies developing transformative therapies and technologies that address significant unmet medical needs.

The firm deploys substantial capital across various stages of company development. For instance, RA Capital closed its RA Capital Nexus Fund II with $880 million in 2023, complementing its earlier RA Capital Healthcare Fund, which secured $1.2 billion in 2021. This significant capital base enables them to make impactful investments, often leading or co-leading substantial funding rounds. Their investment philosophy emphasizes partnership with management teams, providing not just capital but also strategic guidance and access to a vast network within the life sciences industry. They are known for their ability to navigate the complexities of drug development and clinical trials.

RA Capital's typical first cheque sizes for private companies reflect their capacity and the capital-intensive nature of the biotech industry. While they participate in rounds ranging from Series A through crossover and late-stage private financings, their initial investments generally fall between $10 million and $100 million. This range allows them to take meaningful positions in promising ventures, from innovative startups requiring substantial seed capital to more mature private companies on the cusp of significant milestones. Their portfolio includes a diverse array of companies working on novel therapeutic modalities, gene therapies, and precision medicines, underscoring their commitment to advancing healthcare.

Investor Profile

RA Capital Management has backed more than 439 startups, with 44 new investments in the last 12 months alone. The firm has led 145 rounds, about 33% of its total and boasts 186 exits across its portfolio.

Investment Focus Highlights

  • Concentrates on Series B, Post Ipo Equity, Series C rounds (top funding stages).
  • Majority of deals are located in United States, United Kingdom, Canada.
  • Strong thematic focus on Biotechnology, Health Care, Therapeutics.
  • Led 13 rounds in the past year.
  • Typical check size: $10M – $100M.

Stage Focus

  • Series B (28%)
  • Post Ipo Equity (19%)
  • Series C (17%)
  • Series A (15%)
  • Series Unknown (8%)
  • Series D (5%)
  • Seed (3%)
  • Series E (3%)
  • Private Equity (1%)

Country Focus

  • United States (85%)
  • United Kingdom (4%)
  • Canada (3%)
  • Denmark (2%)
  • Switzerland (1%)
  • China (1%)
  • The Netherlands (1%)
  • Ireland (1%)
  • Israel (1%)
  • Germany (1%)

Industry Focus

  • Biotechnology
  • Health Care
  • Therapeutics
  • Medical
  • Pharmaceutical
  • Biopharma
  • Life Science
  • Health Diagnostics
  • Oncology
  • Genetics
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FAQ

Frequently Asked Questions

Learn who this investor regularly partners with—both firms and angels—and explore their latest activity.

Who does RA Capital Management frequently co-invest with?

OrbiMed
North America, New York, United States, New York
Co-Investments: 71
Wellington Management
North America, Massachusetts, United States, Boston
Co-Investments: 35
Surveyor Capital
North America, Illinois, United States, Chicago
Co-Investments: 49
CA
North America, Massachusetts, United States, Boston
Co-Investments: 42
Rock Springs Capital
North America, Maryland, United States, Baltimore
Co-Investments: 38
Perceptive Advisors
North America, New York, United States, New York
Co-Investments: 57
Vivo Capital
North America, California, United States, Palo Alto
Co-Investments: 39
Logos Capital
North America, California, United States, San Francisco
Co-Investments: 48
Janus Henderson Investors
Europe, England, United Kingdom, London
Co-Investments: 61
Boxer Capital
North America, Florida, United States, Windermere
Co-Investments: 42

Which angels does RA Capital Management often collaborate with?

ME
Europe, England, United Kingdom
Shared Deals: 1
CI
North America, New York, United States, New York
Shared Deals: 1
Shared Deals: 2
AU
Europe, Hallands Lan, Sweden, Kungsbacka
Shared Deals: 1
Mark W. Hahn
North America, North Carolina, United States, Chapel Hill
Shared Deals: 1
Zohar Zisapel
Asia, Tel Aviv, Israel, Tel Aviv
Shared Deals: 2
VS
North America, Massachusetts, United States, Boston
Shared Deals: 1
GB
Europe, England, United Kingdom, London
Shared Deals: 2
David Zaccardelli
North America, United States
Shared Deals: 1
DE
Europe, Zurich, Switzerland, Zürich
Shared Deals: 1

What are some of recent deals done by RA Capital Management?

CORXEL Pharmaceuticals

Shanghai, Shanghai, China

CORXEL Pharmaceuticals is a biotechnology company that develops science and medicines for underserved patients.

BiotechnologyHealth CareMedical
Series DJan 22, 2026
Amount Raised: $287,000,000
Kinaset Therapeutics

Boston, Massachusetts, United States

Kinaset Therapeutics is a biopharma company that focuses on advancement of novel drugs in areas of unmet medical needs.

Health CareMedicalTherapeutics
Series BJan 10, 2026
Amount Raised: $103,000,000
Diagonal Therapeutics

Watertown, Massachusetts, United States

Diagonal Therapeutics is a biotechnology startup that develops targeted therapies for cancer and genetic diseases.

BiopharmaBiotechnologyLife ScienceMedicalTherapeutics
Series BJan 8, 2026
Amount Raised: $125,000,000
Century Therapeutics

Philadelphia, Pennsylvania, United States

Century Therapeutics is a biotechnology company that develops cell therapies for hematological and solid tumor malignancies.

BiotechnologyHealth CareHealth Diagnostics
Post Ipo EquityJan 8, 2026
Amount Raised: $135,000,000
Parabilis Medicines

Cambridge, Massachusetts, United States

Parabilis Medicines is a Grupo Bugio is a biopharmaceutical firm that specializes in creating medicines.

BiopharmaBiotechnologyHealth CareLife ScienceMedicalPharmaceuticalPrecision Medicine
Series FJan 8, 2026
Amount Raised: $305,000,000
EvodiaBio

Copenhagen, Hovedstaden, Denmark

EvodiaBio is a bio-industrial firm that creates natural, sustainable scents for the food and beverage industries.

Biotechnology
Series UnknownDec 19, 2025
Amount Raised: $7,053,181
Ambros Therapeutics

Irvine, California, United States

Ambros Therapeutics is a clinical-stage biotechnology company.

BiotechnologyMedicalTherapeutics
Series ADec 16, 2025
Amount Raised: $125,000,000
Vor Biopharma

Cambridge, Massachusetts, United States

Vor Biopharma is an immuno-oncology company that develops therapies for treating cancer.

BiotechnologyHealth CareOncologyPharmaceutical
Post Ipo EquityDec 15, 2025
Amount Raised: $150,000,000
Sidera Bio

Copenhagen, Hovedstaden, Denmark

Sidera Bio harness human genetics, that helps in transformative medicines for patients.

GeneticsHealth CareMedical
Series ADec 9, 2025
Amount Raised: $108,988,092
Triana Biomedicines

Lexington, Massachusetts, United States

Triana Biomedicines is a developer of a molecular glue discovery platform to regulate disease.

BiopharmaBiotechnologyPharmaceuticalTherapeutics
Series BDec 3, 2025
Amount Raised: $120,000,000

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