Form 990-PF for tax year 2024

Totals

Total revenue

$32,374,158

Total expenses

$37,082,537

Contributions and grants received

— not reported

Contributions, gifts and grants paid

$32,944,343

Fair market value of assets, end of year

$691,568,485

Listed in Part VIII

Compensation is as filed in Part VIII of the Form 990-PF: compensation, contributions to benefit plans, expense account, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total.

Grants paid on this return

Grants paid, cash basis (Part I, line 25, column (d))

$32,944,343

As filed, and sometimes filed as 0.

Grants paid, Part XV total (line 3a)

$32,944,343

The foundation's own total of the grants it itemizes.

These are the grants the foundation paid during the year. The “Contributions, gifts and grants paid” total above is the figure on the foundation's books. This return marks the cash method, under which a grant is recorded when it is paid. Even so, the books total and the cash figures in this section can differ, and column (d) is sometimes filed as 0.

• ST MARK'S SCHOOL OF SOUTHBOROUGH

  $3,000,000

  SOUTHBOROUGH, MA

  FOR THE JOHN C. WARREN '74 AND LAURA P. APPELL-WARREN FINANCIAL AID FUND

• MASSACHUSETTS INSTITUTE OF TECHNOLOGY

  $2,614,517

  CAMBRIDGE, MA

  FOR THE CENTER FOR GYNEPATHOLOGY RESEARCH

• TUFTS UNIVERSITY

  $2,300,000

  NORTH GRAFTON, MA

  FOR THE QALIBRA CT SYSTEM

• BOSTON CHILDREN'S HOSPITAL

  $2,000,000

  BOSTON, MA

  FOR THE CELL DISCOVERY NETWORK

• MOUNT DESERT ISLAND HOSPITAL

  $1,500,000

  BAR HARBOR, ME

  FOR THE CENTRAL UTILITY PLANT

• THE TRUSTEES OF RESERVATIONS

  $1,500,000

  BOSTON, MA

  FOR THE MILLBORN FARM CONSERVATION PROJECT

• BROAD INSTITUTE

  $1,400,309

  CAMBRIDGE, MA

  FOR SCAD-RELATED RESEARCH AND INVESTMENTS

• THE NATURE CONSERVANCY

  $1,254,287

  NEW HAVEN, CT

  FOR TREE SPECIES IN PERIL

• THE LIVESTOCK INSTITUTE OF SOUTHERN NEW ENGLAND

  $1,215,371

  WESTPORT, MA

  FOR DEBT RELIEF

• PRESIDENT AND FELLOWS OF HARVARD COLLEGE

  $1,014,382

  CAMBRIDGE, MA

  FOR CURRICULUM INNOVATION, BUILDING THE FRONT-LINE MENTAL HEALTH WORKFORCE, AND EDUCATIONAL RESOURCES

The 10 largest to organizations. The API serves every grant row.

Provenance

Return type

form_990_pf

Tax year

2024

Filed

6 November 2025

IRS schema version

2024v5.2

Source object

202543119349101114

Check it against the return as filed: the GivingTuesday Data Lake hosts a public copy of the original XML.

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