Latest Partners HealthCare System, Inc Stock Portfolio
$468Million | No. of Holdings #6
Partners HealthCare System, Inc Performance
2026 Q1-0.05%
YTD-0.05%
About Partners HealthCare System, Inc and 13F Hedge Fund Stock Holdings
On 2026-05-05, the fund reported it's updated stock portfolio. In the 13F Holdings report, Mass General Brigham, Inc reported an equity portfolio of $468.9 Millions as of 31 Mar, 2026. <br><br> The top stock holdings of Mass General Brigham, Inc are AAXJ, , RVMD. The fund has invested 62.4% of it's portfolio in ISHARES TR and 26.7% of portfolio in KARMAN HLDGS INC. <br><br> The fund managers got completely rid off RUBRIK INC stocks. They significantly reduced their stock positions in ISHARES TR (AAXJ). The fund showed a lot of confidence in some stocks as they added substantially to MEDLINE INC.
Partners HealthCare System, Inc Equity Portfolio Value
Last Reported on: 05 May, 2026
$468Million
as of May 05, 2026Partners HealthCare System, Inc Annual Return Estimates Vs S&P 500
Our best estimate is that Mass General Brigham, Inc made a return of -0.05% in the last quarter. In trailing 12 months, it's portfolio return was NA%.
- Performance
- S&P 500
New Buys
No new stocks were added by Partners HealthCare System, Inc
Additions
| Ticker | % Inc. |
|---|---|
| medline inc | 167 |
Additions to existing portfolio by Partners HealthCare System, Inc
Reductions
| Ticker | % Reduced |
|---|---|
| ishares tr | -53.33 |
Partners HealthCare System, Inc reduced stake in above stock
Sold off
| Ticker | $ Sold |
|---|---|
| rubrik inc | -1,070,720 |
Partners HealthCare System, Inc got rid off the above stocks
Sector Distribution
Mass General Brigham, Inc has about 91.3% of it's holdings in Others sector.
- Others
- Healthcare
| Sector | % |
|---|---|
| Others | 91.3 |
| Healthcare | 8.7 |
Market Cap. Distribution
Mass General Brigham, Inc has about 7.1% of it's portfolio invested in the large-cap and mega-cap stocks.
- UNALLOCATED
- LARGE-CAP
- SMALL-CAP
| Category | % |
|---|---|
| UNALLOCATED | 91.3 |
| LARGE-CAP | 7.1 |
| SMALL-CAP | 1.6 |
Stocks belong to which Index?
About 8.7% of the stocks held by Mass General Brigham, Inc either belong to S&P 500 or RUSSELL 2000 index.
- Others
- RUSSELL 2000
| Index | % |
|---|---|
| Others | 91.3 |
| RUSSELL 2000 | 8.7 |
| Top 5 Losers (%) | % | |
|---|---|---|
maze therapeutics inc | -27.9 % | |
| AAXJ | ishares tr | -2.9 % |
| Top 5 Losers ($) | $ | |
|---|---|---|
| AAXJ | ishares tr | -18.8 M |
maze therapeutics inc | -2.8 M | |
Partners HealthCare System, Inc Holdings Map
This heatmap illustrates the top 50 positions within the fund's portfolio.
Current Stock Holdings of Partners HealthCare System, Inc
Mass General Brigham, Inc has 6 stocks in it's portfolio. AAXJ proved to be the most loss making stock for the portfolio. was the most profitable stock for Mass General Brigham, Inc last quarter.
$468.92MTotal Value
7.00Positions
05 May, 2026Last Reported
| Expand | Holdingsorted ascending | % Portfolio | Shares Held | $ Value | % Change |
|---|---|---|---|---|---|
 AAXJ Ishares TrIshares TrAAXJ | 62.42% | 2,153,480 | $292.71M 62.42% | 53.33%decreased 53.33 percentreduced | |
 Revolution Medicines Inc Partners HealthCare System, Inc's holding in Revolution Medicines Inc over time | 7.14% | 344,091 | $33.46M 7.14% | 0%unchanged 0 percentunchanged | |
 Tango Therapeutics Inc Partners HealthCare System, Inc's holding in Tango Therapeutics Inc over time | 1.58% | 354,192 | $7.41M 1.58% | 0%unchanged 0 percentunchanged | |
Com Karman Hldgs IncKarman Hldgs Inc | 26.67% | 1,562,050 | $125.04M 26.67% | 0%unchanged 0 percentunchanged | |
Com Maze Therapeutics IncMaze Therapeutics Inc | 1.53% | 239,994 | $7.16M 1.53% | 0%unchanged 0 percentunchanged | |
Com Medline IncMedline Inc | 0.67% | 70,357 | $3.13M 0.67% | 167.58%increased 167.58 percentadded | |
Com Rubrik IncRubrik Inc | 0% | 0.00 | $0.00 0% | 100%decreased 100 percentsold off | |