Mass General Brigham, Inc
In its 13F for Q4 2025 (holdings as of December 31, 2025, filed January 27, 2026), Mass General Brigham, Inc reported 7 stock positions worth $809.8 million. Its top holding was iShares MSCI Acwi ETF (ACWI) at 80.6% of the portfolio, followed by Karman (KRMN, 14.1%) and Revolution Medicines (RVMD, 3.4%).
- Most Recent 13F
- Q2 2026
- Location
- SOMERVILLE, MA
- CIK
- 0001678378
- Portfolio Value
- $809.8M (Q4 2025)
- SEC Filing
- 0001214659-26-000882 ↗ filed Jan 27, 2026
Holdings Value
Holdings 7 stocks · $809.8M
| ACWI iShares MSCI Acwi ETF | 80.62% | 4,613,955 | $652.8M | — |
| KRMN Karman Holdings Inc. | 14.11% | 1,562,054 | $114.3M | — |
| RVMD Revolution Medicines Inc. | 3.38% | 344,091 | $27.4M | — |
| MAZE Maze Therapeutics Inc. | 1.23% | 239,994 | $9.9M | — |
| TNGX Tango Therapeutics Inc. | 0.39% | 354,192 | $3.1M | — |
| MDLN Medline Inc. Class A | 0.14% | 26,294 | $1.1M | — |
| RBRK Rubrik Inc. Class A | 0.13% | 14,000 | $1.1M | — |
Portfolio Sells Q4 2025
No earlier filing to compare with.
Portfolio Buys Q4 2025
No earlier filing to compare with.
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 6 | $361.1M | ACWI, KRMN, RVMD, TNGX, MAZE |
| Q1 2026 | 6 | $468.9M | ACWI, KRMN, RVMD, TNGX, MAZE |
| Q4 2025 | 7 | $809.8M | ACWI, KRMN, RVMD, MAZE, TNGX |
| Q3 2024 | 5 | $43.6M | IOT, RVMD, PLRX, TNGX, FULC |
| Q2 2024 | 4 | $20.5M | RVMD, PLRX, TNGX, FULC |
| Q1 2024 | 5 | $57.1M | COIN, RVMD, PLRX, TNGX, FULC |