RA Capital Management
Superinvestor profile · Rank #37 by reported 13F value (2026 Q2 filers) · CIK 0001346824 · All profiles
Founded 2002Boston, Massachusetts, United StatesMulti-stage healthcare, biotechnology and planetary health investing across public and private marketsKey person: Peter Kolchinsky
Reported 13F value
$11.5B
Period 2026-06-30 · Filed 2026-08-14
Positions
84
Top 10 = 60.4% of value
Clone performance
Withheld
Price coverage too low — see note
Latest-quarter activity
17 new · 18 exited
10 increased · 10 decreased
Clone performance withheld for this manager. Only 66.5% of the latest filing's reported value sits inside our price history, and on average 52% of each historical segment's weight is unpriced as well; the rest is mostly non-U.S. listings and small-cap names we cannot price reliably. A clone computed from the priced minority would misrepresent the disclosed portfolio, so we do not publish one. The snapshot, holdings and filing history below are complete as reported. Evidence: filing-by-filing dossier (PDF) · Methodology (PDF)
Top holdings — 2026 Q2 filing
| Ticker | Company | Weight | Reported value |
|---|---|---|---|
| ASND | Ascendis Pharma A/S | 23.83% | $2.7B |
| PBLS | Parabilis Medicines Inc | 6.88% | $792M |
| RYTM | Rhythm Pharmaceuticals Inc | 6.43% | $740M |
| PCVX | Vaxcyte Inc | 5.80% | $667M |
| SION | Sionna Therapeutics Inc | 3.79% | $436M |
| TYRA | Tyra Biosciences Inc | 3.39% | $390M |
| EWTX | Edgewise Therapeutics Inc | 2.96% | $341M |
| NAMS | Newamsterdam Pharma Co Nv | 2.81% | $324M |
| COAG | Hemab Therapeutics Holdings | 2.49% | $287M |
| SEPN | Septerna Inc | 2.04% | $234M |
As reported on the 2026-06-30 Form 13F (filed 2026-08-14). Full holdings and quarter changes: holdings page.
Filing history in this profile
Every clone input traces to one of these SEC filings. 66.5% of the latest filing's reported value is covered by our price history; the remainder is mostly non-U.S. listings, recent IPOs or delisted names and is excluded from the clone.
Background (founded / HQ / style) source: https://en.wikipedia.org/wiki/RA_Capital_Management — Co-founded by Richard Aldrich and Peter Kolchinsky; Wikipedia infobox lists founded January 2002, while firm materials say officially formed / founded in 2004.