PDB Foundation

Private foundation · EIN 82-3779206 · since 2018·California, Massachusetts, New Hampshire, Oklahoma, United Kingdom·Updated 13 October 2026

At a glance

$4.4M
Annual giving, 2024 tax year
From the Form 990-PF filing
$10,000 to $385k
Grant range
From grants in the 990-PF filings
$50,000
Typical grant (median)
29 grants in the latest filing
Invitation only
Unsolicited applications are not accepted

This funder does not accept unsolicited applications. The foundation chooses the organisations it funds itself.

Key takeaways

  • The foundation gives only to organisations it has preselected and does not accept unsolicited requests, and the filing describes no applicant-initiated steps, so a charity that has not been invited should not send a cold application.
  • Its grants mainly support education and food-insecurity work, so a charity in those fields has the closest fit, although no geographic focus is stated.
  • Repeat giving is strong: 93% of its grant dollars to organisations went to groups it had also funded in earlier filings, so it mostly renews existing relationships.
  • About 8 in 10 grants fall between $10,000 and $385,000, with a median of $100,000 and a largest grant of about $830,000, so a request near $100,000 is a realistic reference point, though that band is not a ceiling.
  • The filing gives no timing guidance, so the main question is whether the charity can first build a connection that could lead to an invitation.

Overview

PDB Foundation is a US private foundation based in Cambridge, MA.

What they fund

Profile based on the foundation's IRS Form 990-PF filings (TY2024, TY2023, TY2022) only: no website or other web source for the foundation was found. Every statement is checked against the filings. Sources read on 7 October 2026.

Priority Areas

Across its recorded giving, the foundation supports education most extensively, and also funds food-insecurity work. Its grants cover medical research and health care, family assistance, support for children, education and refugee support, and education and leadership development. Other recorded purposes include youth arts, domestic-violence support, nature conservation, animal rescue, and food and housing assistance. Recipients include schools, a university and a public library fund, food banks and food services, health and research organisations, refugee-serving and family-support charities, and youth organisations. The grant record spans Massachusetts, California, Oklahoma and New Hampshire, alongside grants elsewhere in the United States and overseas.

Themes

From its grants, not stated by the foundation:

  • Education
  • Food insecurity

Geographic Focus

No geographic focus is stated; the filings show grants mainly in Massachusetts, California, Oklahoma, New Hampshire and United Kingdom.

How to apply

The foundation gives to preselected charitable organisations and does not accept unsolicited requests; the filing describes no applicant-initiated application steps.

Application success factors

  • Repeat giving: In its TY2024 filing, 93% of its grant dollars to organisations went to organisations it had also funded in its TY2022 or TY2023 filing.
  • Grant size: Across its TY2022, TY2023 and TY2024 filings, half of its 79 grants to organisations were $100,000 or less.

Where grants go

From grants to organisations in the foundation’s filings for tax years 2022–2024.

Grant dollars by state

Massachusetts44%
California18%
Oklahoma11%
New Hampshire7%
Delaware2%
Rhode Island<1%

1 other state: <1%

Outside the US or with no state on the filing: 17%

  • The largest single recipient received 18% of grant dollars to organisations.
  • In tax year 2024, 93% of grant dollars went to organisations PDB Foundation had funded in earlier filings.
  • 17% of grant dollars went directly to organisations outside the US (United Kingdom).

Grants

29 grants in the latest filing analysed · median $50,000

How much do they typically give?

Share of 29 grants in tax year 2024 by size

$1k–$2.5k3%
$2.5k–$5k0%
$5k–$10k10%
$10k–$25k24%
$25k–$50k0%
$50k–$100k14%
$100k–$250k17%
$250k–$500k28%
$500k–$1M3%

Median $50,000 (tax year 2024)

The largest grants to organisations in the foundation’s latest filing:

  • Mass Liberation · Education
    $830,2332024 tax year
  • University of Strathclyde · Education
    $455,7542024 tax year
  • American Cancer Society · Research
    $450,0002024 tax year
  • Wentworth Institute of Technology · Education
    $355,2002024 tax year
  • Trussell Trust · Food insecurities
    $254,1172024 tax year
  • International Institution Of New England · Education and refugees support
    $250,0002024 tax year
  • Cambridge Health Allicance Foundation · Health care
    $250,0002024 tax year
  • West End House · Education
    $250,0002024 tax year

Grants to organisations listed in the foundation’s Form 990-PF filings. Grants to individuals are not shown.

Officers and directors

  • Morag Bamforth — Trustee
  • Mark R Bamforth — Trustee

From the latest Form 990-PF filing

3 years of tax filings

YearTotal expensesGrants paidAssetsFiling document
2022 tax year$3,213,269$3,043,582$81,592,439Filing for 2022 tax year
2023 tax year$5,213,514$5,035,436$81,615,973Filing for 2023 tax year
2024 tax year$4,611,712$4,411,495$81,248,631Filing for 2024 tax year

Figures from the foundation’s IRS Form 990-PF filings. Assets are at fair market value at year end. The document icon links to each year’s filing on ProPublica Nonprofit Explorer.

Sources

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Contact

  • Cambridge, MA