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Form 990-PFTax year 2025EIN 04-3254488

The River Foundation

A private foundation in Cambridge, MA. Its return for tax year 2025 lists 6 grants and $296,000 paid in grants.

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Tax year 2025 (period ending Dec 31, 2025), read from the IRS e-file on Nov 11, 2026. Returns reach the IRS 5 to 18 months after the year they describe.

How to apply

Preselected only

The return checks the box saying the foundation gives only to preselected organizations and does not accept unsolicited requests.

Assets and giving by year

8 returns on file
Grants paid by tax year. The latest year is in blue.

  • Tax year 2025

    $296,000

    Grants listed
    6
    Assets, end of year
    $1,385,003

  • Tax year 2024

    $193,000

    Grants listed
    5
    Assets, end of year
    $1,414,445

  • Tax year 2023

    $293,000

    Grants listed
    6
    Assets, end of year
    $1,558,351

  • Tax year 2022

    $150,000

    Grants listed
    4
    Assets, end of year
    $1,774,722

  • Tax year 2021

    $313,352

    Grants listed
    8
    Assets, end of year
    $1,866,840

  • Tax year 2020

    $190,000

    Grants listed
    7
    Assets, end of year
    $1,872,408

  • Tax year 2019

    $165,000

    Grants listed
    5
    Assets, end of year
    $1,942,686

  • Tax year 2018

    $206,985

    Grants listed
    10
    Assets, end of year
    $1,993,948

Grants paid in 2025

6 grants, largest first

As listed on the return.

  1. Ancient Egypt Research AssociatesBoston, MA

    Unrestricted

    $100,000
  2. Beth Israel Deaconess Medical CenterBoston, MA

    Unrestricted

    $60,000
  3. Museum of Fine ArtsBoston, MA

    Unrestricted

    $56,000
  4. Cold Spring Harbor LaboratoryCold Spring Harbor, NY

    Unrestricted

    $40,000
  5. Society for Science and the PublicWashington, DC

    Unrestricted

    $25,000
  6. Harvard Art MuseumCambridge, MA

    Unrestricted

    $15,000

Where the money goes

By cause: grants to organizations we matched to the IRS list of exempt organizations, by their category.

  1. Arts and culture1 grant $56,00069% of the total
  2. Science and technology1 grant $25,00031% of the total

By State

Grants to organizations with a US address, latest year.

  1. Massachusetts4 grants $231,000
  2. New York1 grant $40,000
  3. District of Columbia1 grant $25,000

Officers, directors and trustees

6 people as filed

As filed on the return, with average hours per week and pay from the foundation.

  • Walter GilbertTRUSTEE Hours 0Pay $0
  • Celia GilbertTRUSTEE Hours 0Pay $0
  • Kate GilbertTRUSTEE Hours 0Pay $0
  • Eric DomeshekTRUSTEE Hours 0Pay $0
  • John R GilbertTRUSTEE Hours 0Pay $0
  • Valerie LeiterTRUSTEE Hours 0Pay $0

The return

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