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Mass General Brigham, Inc

13F filer · CIK 0001678378
Reported Aug 7, 2026
Net seller this quarter
13F portfolio value$361MU.S. long equity reported on 13F
Positions50 new · 0 closed
Net flow last quarter-$76.7KBuys minus sells
Top 10 positions weight45.2%Concentration

Holdings

13F · last 4 quarters free
Scroll for earlier quarters
CompanyValue% of portfolio% of companyPOSITION CHANGE qoq %First reported
Q2 2026Reported Aug 7, 20265 positions
KRMNKarman Holdings Inc.$78M21.60%1.18%Not reportedQ4 2025
RVMDRevolution Medicines, Inc.$64.4M17.85%0.16%Not reportedQ4 2022
TNGXTango Therapeutics, Inc.$11.1M3.07%0.21%Not reportedQ4 2025
MAZEMaze Therapeutics, Inc.$7.16M1.98%0.43%Not reportedQ4 2025
MDLNMedline Inc.$2.7M0.75%Not reported-2.8%Q4 2025
Q1 2026Reported May 5, 20265 positions
KRMNKarman Holdings Inc.$125M26.67%1.18%Not reportedQ4 2025
RVMDRevolution Medicines, Inc.$33.5M7.14%0.17%Not reportedQ4 2022
TNGXTango Therapeutics, Inc.$7.41M1.58%0.25%Not reportedQ4 2025
MAZEMaze Therapeutics, Inc.$7.16M1.53%0.48%Not reportedQ4 2025
MDLNMedline Inc.$3.13M0.67%Not reported+167.6%Q4 2025
Q4 2025Reported Jan 27, 20266 positions
KRMNKarman Holdings Inc.$114M14.11%1.18%NewQ4 2025
RVMDRevolution Medicines, Inc.$27.4M3.38%0.17%Not reportedQ4 2022
MAZEMaze Therapeutics, Inc.$9.94M1.23%0.49%NewQ4 2025
TNGXTango Therapeutics, Inc.$3.14M0.39%0.26%NewQ4 2025
MDLNMedline Inc.$1.1M0.14%Not reportedNewQ4 2025
RBRKRubrik, Inc.$1.07M0.13%Not reportedNewQ4 2025
Q2 2023Reported Jul 21, 20235 positions
IOTSamsara Inc.$10.5M9.53%Not reportedNewQ2 2023
COINCoinbase Global, Inc.$9.23M8.39%Not reportedNot reportedQ4 2022
FLYWFlywire Corp$1.82M1.65%0.05%NewQ2 2023
GTMZoomInfo Technologies Inc.$1.69M1.53%0.02%NewQ2 2023
RIVNRivian Automotive, Inc. / DE$751K0.68%0.00%NewQ2 2023
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