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CROMWELL HARBOR SUPPORTING FOUNDATION INC

EIN 87-3060445 BOSTON, MA

Largest nonprofits in Massachusetts

Revenue 2023
$4,989,841
Expenses 2023
$2,444,857

Program services were 97.5% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
T31
Classification
1000
Street
TWO INTERNATIONAL PLACE

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Other organizations at this address

8 other organizations in the IRS Business Master File list the same street address. matched by us

We match the street line and ZIP code as the IRS gives them, ignoring case and outer spaces and nothing else, so "AVE" and "AVENUE" count as different streets and this list can miss some. A shared address can mean related organizations or a shared office, but it can also be a registered agent, a mail drop or a service provider holding mail for unrelated clients. It is not, by itself, evidence that two organizations are connected.

Mission and programs · 2023

Mission

TO OPERATE EXCLUSIVELY FOR EDUCATIONAL, CHARITABLE AND SCIENTIFIC PURPOSES WITHIN THE MEANING OF SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE AS A SECTION 509(A)(3) SUPPORTING ORGANIZATION OF THE BOSTON FOUNDATION.

Activities or mission (Part I)

A SECTION 509(A)(3) SUPPORTING ORGANIZATION OF THE BOSTON FOUNDATION.

  • AWARDED GRANTS FOR CHARITABLE PURPOSES.

    Expenses $2,383,667 · Grants $2,383,667

As filed on the 2023 return.

Officers and directors · 2023

As listed in Part VII of the 2023 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • William N Thorndike Jr

    PRESIDENT, TREASURER & CIO

    Total calculated
    $0
    Hours/week
    1

  • Geneva S Thorndike

    CLERK

    Total calculated
    $0
    Hours/week
    1

  • M Lee Pelton

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • Thomas Bird

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • Charles Cheever

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, 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. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. Earlier years are each on their own filing page.

Filings

  • 2023
    Revenue
    $4,989,841
    Expenses
    $2,444,857
    Contributions
    $4,834,125
    Grants paid
    $2,383,667
  • 2022
    Revenue
    $19,072,513
    Expenses
    $393,866
    Contributions
    $16,260,061
    Grants paid
    $391,667

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2021 · 990

    Revenue
    $14,043,991
    Expenses
    $369,000
    Assets (EOY)
    $13,927,704

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all.

Grants made

The 10 largest by cash amount. The API serves every itemized grant.

Where these grants went next →

Grants received

Related organizations

From Schedule R Part II, where a filer lists the tax-exempt organizations it is related to by control. It does not record shared board members or money.

Declared on its 2023 return

Declared as related by

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 13 October 2026, under deductibility SO.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 13 October 2026 and read 1 November 2026, for every organization at once. Returns through tax year 2023, the newest we have parsed for this organization.