Skip to content
Disclosery

Mass General Brigham, Inc

Follow

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

Filings

Every filing of this filer: 13F reports and notices, the 13D and 13G it filed or is a reporting person of, and Forms 3, 4 and 5 it reported as an owner.

FilingSubjectFiledAcceptedIngested
13F-HR 0001214659-26-009752 Quarter ended 2026-06-302026-08-07acceptance time not in the bulk data set
13F-HR 0001214659-26-005558 Quarter ended 2026-03-312026-05-05acceptance time not in the bulk data set
13F-HR 0001214659-26-000882 Quarter ended 2025-12-312026-01-27acceptance time not in the bulk data set
13F-HR 0001678378-24-000006 Quarter ended 2024-09-302024-10-16acceptance time not in the bulk data set
13F-HR 0001678378-24-000004 Quarter ended 2024-06-302024-07-31acceptance time not in the bulk data set
13F-HR 0001678378-24-000003 Quarter ended 2024-03-312024-04-04acceptance time not in the bulk data set
13F-HR 0001678378-24-000001 Quarter ended 2023-12-312024-01-24acceptance time not in the bulk data set
13F-HR 0001678378-23-000004 Quarter ended 2023-09-302023-10-23acceptance time not in the bulk data set
13F-HR 0001678378-23-000003 Quarter ended 2023-06-302023-07-21acceptance time not in the bulk data set
13F-HR 0001678378-23-000002 Quarter ended 2023-03-312023-04-05acceptance time not in the bulk data set
13F-HR 0001678378-23-000001 Quarter ended 2022-12-312023-01-19acceptance time not in the bulk data set
13F-HR 0001678378-22-000005 Quarter ended 2022-09-302022-10-19acceptance time not in the bulk data set
13F-HR 0001678378-22-000004 Quarter ended 2022-06-302022-07-27acceptance time not in the bulk data set
13F-HR 0001678378-22-000003 Quarter ended 2022-03-312022-04-15acceptance time not in the bulk data set
13F-HR 0001678378-22-000001 Quarter ended 2021-12-312022-01-19acceptance time not in the bulk data set
13F-HR 0001678378-21-000006 Quarter ended 2021-09-302021-10-08acceptance time not in the bulk data set
13F-HR 0001678378-21-000005 Quarter ended 2021-06-302021-07-19acceptance time not in the bulk data set
13F-HR 0001678378-21-000002 Quarter ended 2021-03-312021-04-12acceptance time not in the bulk data set
13F-HR 0001678378-21-000001 Quarter ended 2020-12-312021-02-08acceptance time not in the bulk data set
13F-HR 0001678378-20-000006 Quarter ended 2020-09-302020-10-23acceptance time not in the bulk data set
13F-HR 0001678378-20-000001 Quarter ended 2019-12-312020-01-15acceptance time not in the bulk data set
13F-HR 0001678378-19-000007 Quarter ended 2019-09-302019-10-30acceptance time not in the bulk data set
13F-HR 0001678378-19-000006 Quarter ended 2019-06-302019-07-29acceptance time not in the bulk data set
13F-HR 0001678378-19-000004 Quarter ended 2019-03-312019-04-18acceptance time not in the bulk data set
13F-HR 0001678378-19-000003 Quarter ended 2018-12-312019-01-30acceptance time not in the bulk data set
13F-HR 0001678378-18-000002 Quarter ended 2017-12-312018-01-24acceptance time not in the bulk data set
13F-HR 0001678378-18-000001 Quarter ended 2017-09-302018-01-24acceptance time not in the bulk data set
13F-HR 0001678378-17-000003 Quarter ended 2017-06-302017-08-24acceptance time not in the bulk data set
13F-HR 0001678378-17-000002 Quarter ended 2017-03-312017-05-04acceptance time not in the bulk data set
13F-HR 0001678378-17-000001 Quarter ended 2016-12-312017-02-01acceptance time not in the bulk data set
13F-HR 0001678378-16-000007 Quarter ended 2016-09-302016-10-27acceptance time not in the bulk data set
13F-HR 0001678378-16-000006 Quarter ended 2016-06-302016-08-17acceptance time not in the bulk data set
13F-HR 0001678378-16-000005 Quarter ended 2016-03-312016-08-17acceptance time not in the bulk data set
13F-HR 0001678378-16-000002 Quarter ended 2015-12-312016-08-04acceptance time not in the bulk data set