Peter Kolchinsky: Stock Portfolio, Performance and Latest Trades
RA Capital Management
13F portfolio value
$11.5B
84 holdings at Q2 2026
Get an email when Peter Kolchinsky files a new 13F report
Free, no account needed. Unsubscribe with one click.
Peter Kolchinsky's portfolio
As of Q2 2026, filed August 14, 2026 · prices as of October 8, 2026
| Company | Share of portfolio | Average buy price | Return | Current price | Last quarter |
|---|---|---|---|---|---|
| 23.8% | $233.60 | −4.7% | $222.69 | New | |
| 6.88% | $27.37 | +2.6% | $28.09 | New | |
| 6.43% | $38.98 | +130% | $89.64 | No change | |
Vaxcyte Inc.PCVX | 5.80% | $39.92 | +62.9% | $65.02 | No change |
| 3.79% | $16.34 | — | — | No change | |
| 3.39% | $16.25 | +22.9% | $19.97 | No change | |
| 2.96% | $15.67 | +150% | $39.23 | Reduced −20% | |
| 2.81% | $13.90 | +53.0% | $21.26 | No change | |
| 2.49% | $27.59 | +12.0% | $30.89 | New | |
Septerna Inc.SEPN | 2.04% | $23.65 | +56.1% | $36.90 | No change |
| 1.87% | $25.13 | −31.3% | $17.26 | No change | |
| 1.80% | $18.78 | +19.1% | $22.38 | No change | |
GH Research PLCGHRS | 1.78% | $16.32 | +25.3% | $20.45 | Reduced −0.5% |
| 1.56% | $62.98 | −3.5% | $60.77 | No change | |
| 1.55% | $26.90 | −8.5% | $24.62 | No change | |
| 1.51% | $10.47 | −35.0% | $6.80 | Added +82% | |
| 1.49% | $28.29 | −34.6% | $18.50 | No change | |
| 1.39% | $2.63 | +68.6% | $4.43 | No change | |
| 1.38% | $7.23 | +14.7% | $8.29 | No change | |
Wave Life Sciences Ltd.Y95308105 | 1.36% | $8.80 | — | — | No change |
Nuvalent Inc.670703107 | 1.34% | $94.13 | — | — | Reduced −51% |
Abivax Sa-AdrABVX | 1.31% | $133.26 | −33.2% | $89.05 | New |
| 1.29% | $66.63 | +16.0% | $77.28 | New | |
Climb Bio Inc.CLYM | 1.28% | $12.78 | −15.0% | $10.86 | No change |
| 1.04% | $6.59 | +3.6% | $6.82 | Added +29% | |
Zai Lab Ltd-AdrZLAB | 0.95% | $18.54 | +33.8% | $24.81 | Added +0.6% |
| 0.76% | $5.00 | −8.9% | $4.56 | No change | |
Xencor Inc.XNCR | 0.74% | $12.42 | +97.3% | $24.50 | Added +7.7% |
| 0.71% | $11.23 | +26.0% | $14.15 | No change | |
| 0.67% | $14.00 | −10.0% | $12.60 | New | |
| 0.62% | $16.12 | +115% | $34.61 | No change | |
| 0.61% | $24.71 | +38.3% | $34.18 | New | |
| 0.58% | $3.88 | −2.3% | $3.79 | Added +87% | |
| 0.58% | $18.47 | −31.2% | $12.70 | No change | |
| 0.57% | $3.22 | −13.4% | $2.79 | New | |
Damora Therapeutics Inc.36322Q206 | 0.54% | $25.90 | — | — | Added +0.0% |
| 0.54% | $35.96 | +134% | $83.98 | No change | |
| 0.49% | $10.00 | −79.0% | $2.10 | No change | |
Geron Corp.GERN | 0.48% | $2.37 | −48.5% | $1.22 | Reduced −33% |
Rezolute Inc.RZLT | 0.43% | $2.40 | +93.5% | $4.64 | Added +2.9% |
Evommune Inc.EVMN | 0.40% | $18.83 | −66.0% | $6.41 | No change |
| 0.38% | $23.03 | −16.9% | $19.13 | Reduced −56% | |
| 0.38% | $2.10 | −30.6% | $1.46 | No change | |
| 0.37% | $19.42 | −8.6% | $17.74 | Reduced −13% | |
Bioage Labs Inc.BIOA | 0.36% | $19.24 | −67.7% | $6.21 | Added +1.3% |
| 0.32% | $2.37 | +20.3% | $2.85 | No change | |
| 0.32% | $94.07 | −13.5% | $81.35 | No change | |
| 0.32% | $28.86 | −72.2% | $8.01 | No change | |
Pepgen Inc.PEPG | 0.31% | $8.18 | −70.9% | $2.38 | No change |
| 0.30% | $4.35 | −10.9% | $3.88 | New | |
Nkarta Inc.NKTX | 0.27% | $20.80 | −89.3% | $2.22 | No change |
Q32 Bio Inc.QTTB | 0.26% | $12.74 | −36.5% | $8.09 | New |
| 0.26% | $5.74 | +15.4% | $6.63 | No change | |
| 0.25% | $2.92 | −2.8% | $2.84 | New | |
| 0.25% | $1.54 | +51.9% | $2.34 | Reduced −2.0% | |
| 0.24% | $21.94 | +4.0% | $22.82 | No change | |
| 0.23% | $1.91 | −38.1% | $1.18 | No change | |
| 0.22% | $13.83 | −36.7% | $8.75 | No change | |
| 0.21% | $20.79 | −83.0% | $3.53 | No change | |
| 0.20% | $9.13 | −64.8% | $3.21 | No change | |
| 0.19% | $7.86 | −76.2% | $1.87 | Added +47% | |
| 0.17% | $2.99 | −12.9% | $2.60 | New | |
| 0.16% | $7.62 | — | — | No change | |
| 0.16% | $80.49 | −35.4% | $52.00 | No change | |
| 0.16% | $12.16 | +10.4% | $13.43 | Added +51% | |
| 0.16% | $3.09 | −25.5% | $2.30 | No change | |
| 0.16% | $23.13 | +10.7% | $25.61 | New | |
| 0.15% | $7.15 | −9.1% | $6.51 | New | |
| 0.15% | $2.26 | +27.8% | $2.89 | No change | |
| 0.13% | $17.59 | +1.8% | $17.91 | New | |
| 0.13% | $1.92 | −24.6% | $1.45 | No change | |
| 0.12% | $10.31 | +1.8% | $10.50 | No change | |
| 0.09% | $29.02 | −8.7% | $26.48 | No change | |
| 0.09% | $1.65 | −12.5% | $1.44 | No change | |
Macrogenics Inc.MGNX | 0.07% | $2.13 | +66.4% | $3.55 | No change |
Freenome Inc.FRNM | 0.07% | $10.06 | +57.2% | $15.81 | No change |
Adicet Bio Inc.ACET | 0.07% | $10.35 | −44.5% | $5.74 | Reduced −21% |
| 0.06% | $3.75 | — | — | No change | |
| 0.06% | $14.63 | −30.2% | $10.21 | No change | |
| 0.06% | $1.35 | −41.3% | $0.792 | No change | |
| 0.05% | $10.63 | −0.7% | $10.56 | New | |
| 0.03% | $10.10 | +4.0% | $10.50 | New | |
| 0.01% | $9.71 | −90.6% | $0.91 | Reduced −64% | |
| 0.01% | $13.14 | −31.4% | $9.01 | Reduced −11% |
Peter Kolchinsky's buys and sells
| Company | Action | Shares change | Value now |
|---|---|---|---|
| Added +7.9% | +824,041 | $302.1M | |
Vaxcyte Inc.PCVX | Added +40% | +3,499,959 | $460.3M |
| Sold out | −7,506,934 | — | |
Ascendis Pharma A/S04351P101 | Added +1.7% | +168,752 | $1.6B |
| Sold out | −1,228,240 | — | |
| New | +10,445,322 | $109.3M | |
| Sold out | −1,000,000 | — | |
| Sold out | −1,766,830 | — | |
| New | +1,577,106 | $78.3M | |
| Sold out | −761,955 | — | |
| Sold out | −7,725,096 | — | |
| Added +52% | +3,333,248 | $101.6M | |
| Sold out | −3,577,197 | — | |
| Added +27% | +1,296,296 | $97.6M | |
| Added +6351% | +1,118,837 | $36.5M | |
| New | +3,206,271 | $35.5M | |
89bio Inc.282559103 | Added +40% | +5,714,285 | $144.6M |
Chimerix Inc.16934W106 | Sold out | −8,800,000 | — |
| Reduced −41% | −1,335,154 | $17M | |
GH Research PLCGHRS | Added +3.9% | +257,959 | $76.6M |
| Added +15% | +1,293,938 | $207.5M | |
Glaukos Corp.GKOS | New | +190,256 | $18.7M |
Metsera Inc59267L107 | New | +675,525 | $18.4M |
| Sold out | −4,878,000 | — | |
| Sold out | −1,281,000 | — | |
Arcellx Inc.03940C100 | Added +8.9% | +249,200 | $199.2M |
| Reduced −10% | −446,431 | $26.4M | |
| Added +54% | +1,000,333 | $52M | |
Geron Corp.GERN | Added +101% | +30,369,830 | $96M |
Third Harmonic Bio Inc.88427A107 | Sold out | −960,620 | — |
| Reduced −55% | −254,402 | $7.4M | |
| New | +1,136,364 | $8.9M | |
Arvinas Inc.ARVN | Sold out | −421,348 | — |
| New | +217,000 | $6.6M | |
| New | +500,000 | $6.1M | |
| Sold out | −1,038,000 | — | |
Iteos Therapeutics Inc.46565G104 | Added +74% | +1,556,798 | $21.8M |
Humacyte Inc.HUMA | New | +3,312,356 | $5.6M |
Surrozen Inc.SRZN | Added +140% | +396,550 | $7.9M |
Bioage Labs Inc.BIOA | Reduced −20% | −258,095 | $4M |
Sutro Biopharma Inc.869367102 | New | +4,434,637 | $2.9M |
Allakos Inc.01671P100 | Sold out | −1,129,931 | — |
| New | +1,000,000 | $635.8K | |
| Sold out | −336,843 | — |
Peter Kolchinsky's portfolio by sector
Share of the stock portfolio at Q2 2026.
| Sector | Share |
|---|---|
| Health Care | 96% |
| Other | 3.2% |
| Financials | 0.2% |
| Technology | 0.1% |
Portfolio performance: Peter Kolchinsky vs. benchmarks
Your result if you had bought each reported portfolio on the day it was made public and held it until the next report, against the S&P 500 and Nasdaq-100.
- You, copying after each 13F filing – estimated value
- S&P 500
- Nasdaq-100
| Total return | Per year | |
|---|---|---|
| You, copying after each 13F filing – estimated value | −42.3% | −10.4% |
| S&P 500 | +89.0% | +13.6% |
| Nasdaq-100 | +113.3% | +16.4% |
Prices were available for 36% of the portfolio value on average; the rest is left out of the return.
Peter Kolchinsky's most traded stocks
Quarters with a buy or a sell, all reports since Q2 2013.
| Company | Quarters bought | Quarters sold |
|---|---|---|
| 19 | 9 | |
| 13 | 14 | |
| 10 | 9 | |
| 9 | 9 | |
| 11 | 6 | |
| 3 | 14 | |
Vaxcyte Inc.PCVX | 12 | 4 |
Ardelyx Inc.ARDX | 6 | 9 |
GH Research PLCGHRS | 11 | 2 |
Macrogenics Inc.MGNX | 8 | 5 |
Xencor Inc.XNCR | 7 | 5 |
| 5 | 7 | |
| 7 | 5 | |
| 4 | 8 | |
| 7 | 4 |