StockDriftsStockDriftsTop 6 Mass General Brigham, Inc Holdings
| Stock | Company | % Port. | Shares | Value | Activity | Ownership | Avg. Cost | Date |
|---|---|---|---|---|---|---|---|---|
| ACWI | ISHARES TR | 54.76% | 1.26M | $197.7M | -41.51%(-893.82K) | $139.87(+15.45%) | 2026-06-30 | |
| KRMN | KARMAN HLDGS INC | 21.6% | 1.56M | $78.0M | +0.00%(+0) | $72.68(-14.98%) | 2026-06-30 | |
| RVMD | REVOLUTION MEDICINES INC | 17.85% | 344.1K | $64.4M | +0.00%(+0) | $23.37(+767.93%) | 2026-06-30 | |
| TNGX | TANGO THERAPEUTICS INC | 3.07% | 354.2K | $11.1M | +0.00%(+0) | $8.92(+200.45%) | 2026-06-30 | |
| MAZE | MAZE THERAPEUTICS INC | 1.98% | 240.0K | $7.2M | +0.00%(+0) | $33.68(-20.29%) | 2026-06-30 | |
| MDLN | MEDLINE INC | 0.75% | 68.4K | $2.7M | -2.76%(-1.94K) | $42.78(-20.39%) | 2026-06-30 |
| Performance Metric | 3-Year Annualized | 3-Year Cumulative | 5-Year Annualized | 5-Year Cumulative |
|---|---|---|---|---|
| Top 20 Holdings Weighted | +49.55% | +234.47% | +25.56% | +212.03% |
| Top 20 Holdings Unweighted | +35.47% | +148.59% | +6.08% | +34.34% |
Mass General Brigham, Inc reports $361.08M in US-listed equity holdings across 6 positions in its most recent 13F filing. Its largest disclosed positions are ACWI (54.8%), KRMN (21.6%) and RVMD (17.9%). The top 20 holdings account for 100.01% of reported assets. Its disclosed equity book has returned +234.47% on a three-year cumulative basis. Figures reflect the Q2 2026 filing.
Portfolio changes
Every reported change this quarter, grouped by direction. The signal is in the rotation, not any single trade.
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Holdings on this page are parsed from Mass General Brigham, Inc’s Form 13F filings with the U.S. Securities and Exchange Commission (CIK 1678378). View Mass General Brigham, Inc’s 13F filings on SEC