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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?

Hemab

Copenhagen, Hovedstaden, Denmark

Hemab is a clinical-stage biotech company that develops prophylactic biologic therapies for underserved bleeding and thrombotic.

BiotechnologyLife ScienceMedicalPharmaceutical
Series COct 27, 2025
Amount Raised: $157,000,000
VitriVax

Boulder, Colorado, United States

VitriVax is a formulation technology company that engineers solutions to maximize the accessibility and utility of human vaccines.

BiotechnologyMedicalMedical DeviceTherapeutics
Series BOct 22, 2025
Amount Raised: $17,250,000
Electra Therapeutics

San Francisco, California, United States

Electra Therapeutics is a clinical-stage biotechnology company developing antibody therapies for immunological diseases and cancer.

BiotechnologyHealth CareMedical
Series COct 22, 2025
Amount Raised: $183,000,000
Rani Therapeutics

San Jose, California, United States

Rani is a clinical-stage biotherapeutics company that enables the development of orally administered biologics to improve patient outcomes.

BiotechnologyPharmaceuticalTherapeutics
Post Ipo EquityOct 17, 2025
Amount Raised: $60,300,000
Adcytherix

Marseille, Provence-Alpes-Cote d'Azur, France

Adcytherix is a biopharmaceutical firm that specializes in the development of new antibody drug conjugates (ADC).

BiotechnologyOncology
Series AOct 16, 2025
Amount Raised: $122,438,699
C4 Therapeutics

Cambridge, Massachusetts, United States

C4 Therapeutics develops novel early stage therapies that eliminate disease-causing proteins.

Health DiagnosticsMedicalTherapeutics
Post Ipo EquityOct 16, 2025
Amount Raised: $125,000,000
Jade Biosciences

Waltham, Massachusetts, United States

Jade Biosciences is developing transformative therapies to redefine the standard of care for inflammation and immunology indications.

Health CareTherapeutics
Post Ipo EquityOct 7, 2025
Amount Raised: $135,000,000
Ovid Therapeutics

New York, New York, United States

Ovid Therapeutic's purpose is to solve intractable medical problems.

BiopharmaBiotechnologyHealth Care
Post Ipo EquityOct 3, 2025
Amount Raised: $81,000,000
Palisade Bio

Carlsbad, California, United States

Palisade Bio is a clinical-stage biopharmaceutical company that develops therapies for acute and chronic gastrointestinal complications.

BiopharmaBiotechnologyHealth CareTherapeutics
Post Ipo EquityOct 1, 2025
Amount Raised: $138,000,000
Star Therapeutics

South San Francisco, California, United States

Star Therapeutics mission is to develop therapies for as many diseases as possible for millions of patients.

Health CareMedicalTherapeutics
Series DSep 30, 2025
Amount Raised: $125,000,000