RA Capital Management — Seed & Pre-Seed VC Firm ($1.0M–$5.0M Checks)
RA Capital Management is a Seed, Pre-Seed venture capital firm based in Boston, MA investing in Healthcare, Other. The firm typically writes $1.0M–$5.0M checks and has 7 portfolio companies in our records.
- Check size
- $1.0M–$5.0M
- Portfolio
- 7 companies on record
- Partners
- 11 listed
- AUM
- $13B
- Stage
- Seed, Pre-Seed
- Sectors
- Healthcare, Other
- HQ
- Boston, MA
Last verified: 2026-07-09
Seed, Pre-Seed
$1.0M – $5.0M
$12.6B
7+ companies
11 partners
Investment Thesis
RA Capital specializes in identifying and supporting transformative life sciences ventures, with a deep focus on biotech and innovative pharmaceuticals.
How RA Capital Management invests
RA Capital Management is a vc firm based in Boston, MA. The firm invests at the Seed, Pre-Seed stages, with a focus on Healthcare, Other.
RA Capital Management typically writes checks of $1.0M–$5.0M per investment, backed by approximately $13B in assets under management.
RA Capital Management has backed 7 companies in our records, including Spero Therapeutics, Aimmune Therapeutics, Lusaris Therapeutics.
Partners & Team
Laura Stoppel is a Partner on the Investment Team at RA Capital Management. Laura works on both public and private investments and serves as a Board Director for Artiva Biotherapeutics, Nimbus Therapeutics, and Acumen Pharmaceuticals. Previously, Laura covered hematologic malignancies, cell therapies, retinal diseases, and orphan neurodevelopmental disorders. Her graduate research investigated synaptic translation in syndromic autism. Laura holds a BA in Biology and Psychology from Harvard University and a PhD in Neuroscience from MIT.
Industry Focus
Invests In
Portfolio Companies (7)
Other
Spero Therapeutics
Aimmune Therapeutics
Lusaris Therapeutics
Eliem Therapeutics
Aerovate Therapeutics
Imbria Pharmaceuticals
Athenen Therapeutics
- •Raising at Seed, Pre-Seed? You're squarely in their sweet spot.
- •Lead with your fit in Healthcare, Other — the sectors they actively back.
- •Size your ask to their typical $1.0M – $5.0M check.
- •warm intro preferred
- •Address your outreach to a specific partner, such as Peter Kolchinsky, Managing Partner.
- •A warm introduction beats a cold email. Get matched and request an intro.
Featured In
Browse More Investors
Fundraising resources
Frequently Asked Questions
See if RA Capital Management is a match for your startup
Upload your pitch deck to see how well you match with RA Capital Management and 10,000+ other investors.
Ask your AI assistant about this investor: connect InvestorMatch to Claude or ChatGPT
Is this your profile? Request a correction or removal