SEC 13F Intelligence

Managers / Q1 2023 · view latest →

Mass General Brigham, Inc

CIK 0001678378 · 399 REVOLUTION DRIVE, SUITE 612, SOMERVILLE, MA, 02145 · 8572777268

Reported Value
$128,310
Q1 2023
Positions
6
Filings on Record
24
2019–present window
Filed
Apr 5, 2023
original filing

Summary

Mass General Brigham, Inc reported $128,310 in U.S.-listed holdings across 6 positions for Q1 2023.

The portfolio is heavily concentrated: Ishares Core Sp 500 Etf alone accounts for 52.8% of reported value.

Compared with Q4 2022, the fund opened 2 new positions and exited 1.

Portfolio Metrics

Turnover
+9.4%
vs prior filed quarter
Largest Position
+52.8%
Ishares Core Sp 500 Etf
New / Exited
2 / 1
positions this quarter

Methodology: turnover is min(value bought, value sold) ÷ average reported value across the two quarters — value-based, so market moves inflate it slightly versus a share-based measure. Concentration and largest position are shares of the filing’s total reported value, options excluded. New/exited counts compare against the prior filed quarter. All figures derive solely from the fund’s 13F filings.

Reported Value by Quarter

13F Reported Value
Q4 ’18: $144MQ4 ’18Q1 ’19: $162MQ2 ’19: $153MQ3 ’19: $436MQ3 ’19Q4 ’19: $290MQ3 ’20: $126MQ4 ’20: $473MQ4 ’20Q1 ’21: $639MQ2 ’21: $410MQ3 ’21: $371MQ3 ’21Q4 ’21: $282MQ1 ’22: $235MQ2 ’22: $214MQ2 ’22Q3 ’22: $192MQ1 ’23: $128,310Q3 ’23: $11MQ3 ’23Q4 ’23: $28MQ1 ’24: $57MQ2 ’24: $21MQ2 ’24Q3 ’24: $44MQ4 ’25: $810MQ1 ’26: $469MQ1 ’26filingsflow.com

Portfolio Composition

By security type
ETP: 86.2%Common Stock: 13.8%
  • ETP · 86.2% · $110,659
  • Common Stock · 13.8% · $17,651

Quarter-over-Quarter Changes full breakdown →

vs Q4 2022 (amended baseline)

IssuerMoveShare ΔShares nowValue ΔValue now
PATHUIPATH INCNEW+52.1K52.1K+$915$915
RIVNRIVIAN AUTOMOTIVE INCNEW+45.1K45.1K+$698$698
RVMDREVOLUTION MEDICINES INCADDED+316.8K338.2K+$6,815$7,325
WTTRSELECT ENERGY SVCS INCSOLD OUT−60.7K0−$561$0
ISHARES CORE U.S. AGGREGATE ETFTRIMMED−122.4K430.7K−$10,733$42,912
ISHARES CORE SP 500 ETFTRIMMED−46.5K164.8K−$13,428$67,747
COINCOINBASE GLOBAL INC CLASS AHELD+0128.9K+$4,151$8,713

Value changes conflate price moves with buying and selling — share changes are the real signal. Share counts are not split-adjusted.

Holdings — Q1 2023

6 positions
Export to Excel
#IssuerClass% PortfolioValue ↓Shares
1ISHARES CORE SP 500 ETFETF52.80%$67,747164.8K
2ISHARES CORE U.S. AGGREGATE ETFETF33.44%$42,912430.7K
3COINCOINBASE GLOBAL INC CLASS Ahistory →CL A6.79%$8,713128.9K
4RVMDREVOLUTION MEDICINES INChistory →COM5.71%$7,325338.2K
5PATHUIPATH INCCL A0.71%$91552.1K
6RIVNRIVIAN AUTOMOTIVE INCCL A0.54%$69845.1K

Filing History

QuarterReported ValuePositionsFiledTypeLinks
Q1 2026$469M6May 5, 202613F-HRchanges · EDGAR ↗
Q4 2025$810M7Jan 27, 202613F-HRchanges · EDGAR ↗
Q3 2024$44M5Oct 16, 202413F-HRchanges · EDGAR ↗
Q2 2024$21M4Jul 31, 202413F-HRchanges · EDGAR ↗
Q1 2024$57M5Apr 4, 202413F-HRchanges · EDGAR ↗
Q4 2023$28M2Jan 24, 202413F-HRchanges · EDGAR ↗
Q3 2023$11M2Oct 23, 202313F-HRchanges · EDGAR ↗
Q2 2023Under review7Jul 21, 202313F-HRchanges · EDGAR ↗
Q1 2023$128,3106Apr 5, 202313F-HRchanges · EDGAR ↗
Q4 2022Under review5Jan 19, 202313F-HRchanges · EDGAR ↗
Q3 2022$192M3Oct 19, 202213F-HRchanges · EDGAR ↗
Q2 2022$214M3Jul 27, 202213F-HRchanges · EDGAR ↗
Q1 2022$235M5Apr 15, 202213F-HRchanges · EDGAR ↗
Q4 2021$282M7Jan 19, 202213F-HRchanges · EDGAR ↗
Q3 2021$371M7Oct 8, 202113F-HRchanges · EDGAR ↗
Q2 2021$410M9Jul 19, 202113F-HRchanges · EDGAR ↗
Q1 2021$639M3Apr 12, 202113F-HRchanges · EDGAR ↗
Q4 2020$473M3Feb 8, 202113F-HRchanges · EDGAR ↗
Q3 2020$126M2Oct 23, 202013F-HRchanges · EDGAR ↗
Q4 2019$290M3Jan 15, 202013F-HRchanges · EDGAR ↗
Q3 2019$436M3Oct 30, 201913F-HRchanges · EDGAR ↗
Q2 2019$153M1Jul 29, 201913F-HRchanges · EDGAR ↗
Q1 2019$162M1Apr 18, 201913F-HRchanges · EDGAR ↗
Q4 2018$144M1Jan 30, 201913F-HRchanges · EDGAR ↗

13F filings are due up to 45 days after quarter end, so holdings shown here lag the fund’s current book. Source: original SEC filing on EDGAR ↗.