Investor
Mass General Brigham, Inc
CIK 0001678378 · filed 2026-05-05 · SEC filing
13F book
$468.9M
Positions
6
0 new · 1 sold
Largest name
62.4%
Ishares Tr
Est. mark
$6.38M
Price effect on 6 names still held. Flow −$347.2M.
| Name | Ticker | Shares | Value | Weight | Est. mark | Change |
|---|---|---|---|---|---|---|
| Ishares Tr | — | 2.15M | $292.7M | 62.4% | −$12M | Cut−$360.1M |
| Karman Hldgs Inc | — | 1.56M | $125M | 26.7% | $10.7M | Held |
| Revolution Medicines Inc | — | 344.1K | $33.5M | 7.1% | $6.06M | Held |
| Tango Therapeutics, Inc. | TNGX | 354.2K | $7.41M | 1.6% | $4.27M | Held |
| Maze Therapeutics, Inc. | MAZE | 240K | $7.16M | 1.5% | −$2.78M | Held |
| Medline Inc. | MDLN | 70.4K | $3.13M | 0.7% | $65.7K | Added$2.03M |
Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.