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Mass General Brigham, Inc

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13F filer, CIK 1678378, SOMERVILLE, MA

Mass General Brigham, Inc reported $361,079,129 across 6 holdings for the quarter ended 2026-06-30, in a 13F-HR filed 2026-08-07.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001214659-26-009752

Period
2026-06-30
Reported value
$361M
Holdings
6
Top 10 weight
100%
New
0
Sold out
0

Largest buys vs the previous quarter

None.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
ACWIreduced-893,820-$140M
MDLNreduced-1,944-$76.7K

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q2 2026

Share positions as resolved from 13F-HR 0001214659-26-009752, largest first. % of portfolio is the value over $361,079,129, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
ACWIISHARES TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 4,613,955 shares; 2026Q1: 2,153,477 shares; 2026Q2: 1,259,657 shares 1,259,657$198M54.76%-893,820Timeline
KRMNKARMAN HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 1,562,054 shares; 2026Q1: 1,562,054 shares; 2026Q2: 1,562,054 shares 1,562,054$78M21.6%0Timeline
RVMDREVOLUTION MEDICINES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 338,191 shares; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 344,091 shares; 2026Q1: 344,091 shares; 2026Q2: 344,091 shares 344,091$64.4M17.85%0Timeline
TNGXTANGO THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 354,192 shares; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 354,192 shares; 2026Q1: 354,192 shares; 2026Q2: 354,192 shares 354,192$11.1M3.07%0Timeline
MAZEMAZE THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 239,994 shares; 2026Q1: 239,994 shares; 2026Q2: 239,994 shares 239,994$7.16M1.98%0Timeline
MDLNMEDLINE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not loaded; 2025Q1: not loaded; 2025Q2: not loaded; 2025Q3: not loaded; 2025Q4: 26,294 shares; 2026Q1: 70,357 shares; 2026Q2: 68,413 shares 68,413$2.7M0.75%-1,944Timeline

How Q2 2026 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001214659-26-009752 base2026-08-07acceptance time not in the bulk data set