Mission
INVESTING POOLING ENTITY
Public Charity
MGB POOLED HOLDINGS LLC
MGB POOLED HOLDINGS LLC is a private foundation categorized as Public Charity based in SOMERVILLE, MA. Its most recent IRS filing (2025) reports revenue of $1.4B, expenses of $484.0M, total assets of $18.2B. Imperigo tracks 4 reported grants from this foundation totaling approximately $2.9B.
EIN: 821715859
SOMERVILLE, MA
Support N.E.C.
NTEE: E19
Latest filing: 2025
Total Revenue$1.4B
Total Expenses$484.0M
Total Assets$18.2B
Grants Given4
Grant Total$2.9B
Filing Years2021–2025
Where $100 goes at Mgb Pooled Holdings LLC
How Mgb Pooled Holdings LLC divides every $100 it spends, from its own Form 990 filings, averaged across 8 years.
$100
Programs
the work itself
<$1
Management
running the organization
$0
Fundraising
none reported
No fundraising costs are reported. That often means fundraising runs through a separate affiliated organization that files its own return.
Inside the $100 for programs
$100
The establishment of mgbph as a pooling vehicle allows the members of mass general brigham incorporated the opportunity to provide greater efficiency and expertise to advance the prudent…
Source: Form 990 filings with the IRS, latest fiscal year 2025. Shares are from the organization's reported expenses. Data by Imperigo; not affiliated with the IRS.
Sample Grants Given
COMMUNITY BENEFIT PROGRAM
$483,991,393
COMMUNITY BENEFIT PROGRAM
$224,054,030
COMMUNITY BENEFIT PROGRAM
$508,485,929
COMMUNITY BENEFIT PROGRAM
$1,645,523,450
Showing up to 5 of 4 total records — full history available with membership.
Officers & Directors
SECRETARY
Debra Sloan
PRESIDENT
Emma Somers-Roy
TREASURER
Niyum Gandhi
Officer compensation and complete director data available with membership.
Top Grant Purposes
Financial Trends
| Year | Revenue | Expenses | Assets |
|---|---|---|---|
| 2025 | $1.4B | $484.0M | $18.2B |
| 2024 | $892.1M | $224.1M | $16.2B |
| 2023 | $272.8M | $508.5M | $13.9B |
| 2022 | $499.1M | $1.6B | $13.2B |
| 2021 | $817.5M | — | $17.2B |
Between 2021 and 2025, reported annual revenue grew from $817.5M to $1.4B (+73%), with total assets most recently reported at $18.2B.
Interactive year-over-year charts and full filing details available with membership.
Grant Geography
Grants from this foundation were reported to recipients in MA.
MA
Full geographic grant map with state-by-state breakdown available with membership.