Mass General Brigham, Inc
In its 13F for Q2 2026 (holdings as of June 30, 2026, filed August 7, 2026), Mass General Brigham, Inc reported 6 stock positions worth $361.1 million. Its top holding was iShares MSCI Acwi ETF (ACWI) at 54.8% of the portfolio, followed by Karman (KRMN, 21.6%) and Revolution Medicines (RVMD, 17.8%). Compared with Q1 2026, it reduced 2. The biggest sale was iShares MSCI Acwi ETF (ACWI, shares −42%).
- Most Recent 13F
- Q2 2026
- Location
- SOMERVILLE, MA
- CIK
- 0001678378
- Portfolio Value
- $361.1M (Q2 2026)
- SEC Filing
- 0001214659-26-009752 ↗ filed Aug 7, 2026
Holdings Value
Holdings 6 stocks · $361.1M
| ACWI iShares MSCI Acwi ETF | 54.76% | 1,259,657 | $197.7M | Reduce -41.5% |
| KRMN Karman Holdings Inc. | 21.60% | 1,562,054 | $78.0M | No change |
| RVMD Revolution Medicines Inc. | 17.85% | 344,091 | $64.4M | No change |
| TNGX Tango Therapeutics Inc. | 3.07% | 354,192 | $11.1M | No change |
| MAZE Maze Therapeutics Inc. | 1.98% | 239,994 | $7.2M | No change |
| MDLN Medline Inc. Class A | 0.75% | 68,413 | $2.7M | Reduce -2.8% |
Portfolio Sells Q1 2026 → Q2 2026
Portfolio Buys Q1 2026 → Q2 2026
| None this quarter. | |||
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 |