RA Capital Management, L.P.

RA Capital Management, L.P. is a major investment management firm specializing in biotechnology, pharmaceuticals, and life sciences, investing across public and private markets. While it does invest in private companies, RA Capital typically engages at later venture or growth stages where clinical, regulatory, or commercial risk is already reduced. It is not suitable for seed fundraising, and is relevant mainly for advanced biotech startups with meaningful data and progress.