Holders — by stockHoldings — by fund
Bain Capital Life Sciences Investors, LLC
Everything this manager disclosed owning in US-listed stocks — its complete Form 13F portfolio · as of 2026-06-30 · filed with the SEC up to 45 days after quarter end · CIK 0001703031
$1.68B
disclosed book value
21
positions
29.6%
largest position share
Positions, as of 2026-06-30
top 21 of 21 · 13F covers long US-listed positions only — cash, bonds, private and foreign stakes are not disclosed · PUT/CALL tags = options positions (share-equivalents), not shares held
| # | Issuer | Shares | Value | % of book |
|---|---|---|---|---|
| 1 | KLRAKAILERA THERAPEUTICS INC | 22.6M | $497.5M | 29.6% |
| 2 | HTFLHEARTFLOW INC | 8.4M | $247.9M | 14.7% |
| 3 | NEWAMSTERDAM PHARMA COMPANY | 3.8M | $129.0M | 7.7% |
| 4 | SVRASAVARA INC | 17.6M | $108.4M | 6.4% |
| 5 | ALKERMES PLC | 1.9M | $101.5M | 6% |
| 6 | SLDBSOLID BIOSCIENCES INC | 9.8M | $98.0M | 5.8% |
| 7 | PHARVARIS N V | 2.7M | $92.5M | 5.5% |
| 8 | OLMAOLEMA PHARMACEUTICALS INC | 7.1M | $88.6M | 5.3% |
| 9 | COAGHEMAB THERAPEUTICS HOLDINGS INC | 1.6M | $60.6M | 3.6% |
| 10 | CABACABALETTA BIO INC | 17.2M | $53.6M | 3.2% |
| 11 | XFORX4 PHARMACEUTICALS INC | 8.0M | $37.2M | 2.2% |
| 12 | DNTHDIANTHUS THERAPEUTICS INC | 362,470 | $35.3M | 2.1% |
| 13 | CCCCC4 THERAPEUTICS INC | 7.2M | $33.5M | 2% |
| 14 | KYTXKYVERNA THERAPEUTICS INC | 2.9M | $25.7M | 1.5% |
| 15 | ANNXANNEXON INC | 4.4M | $25.3M | 1.5% |
| 16 | RPIDRAPID MICRO BIOSYSTEMS INC | 8.4M | $14.6M | 0.9% |
| 17 | IRONDISC MEDICINE INC | 141,234 | $10.3M | 0.6% |
| 18 | AVIRATEA PHARMACEUTICALS INC | 2.1M | $9.7M | 0.6% |
| 19 | XLOXILIO THERAPEUTICS INC | 664,021 | $6.4M | 0.4% |
| 20 | UPBUPSTREAM BIO INC | 600,949 | $4.2M | 0.2% |
| 21 | NEWAMSTERDAM PHARMA COMPANY | 99,999 | $2.1M | 0.1% |
Source: SEC Form 13F-HR, reporting period 2026-06-30. Values are the manager's filed June-30-style quarter-end marks, not live prices. Research, not investment advice.