The Massachusetts State Capitol

Form 990-PFTax year 2025EIN 04-6851595

Shirley Shattuck Windsor Charitable Trust

A private foundation in Boston, MA. Its return for tax year 2025 lists 16 grants and $360,000 paid in grants.

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

Accepts applications

The return gives an application contact and rules, as below.

Contact person
On file
Phone
On file
Mailing address
On file
Form and materials
On file
Deadlines
Consult above
Restrictions
Qualified charitable organizations with an emphasis on, but not limited to, the prevention of cruelty to animals or for the relief of the poor, the distressed or the underprivileged.

Contact person, phone, mailing address and application materials on file. See them with a plan.

Assets and giving by year

8 returns on file
Grants paid by tax year. The latest year is in blue.
  • Tax year 2025

    $360,000

    Grants listed
    16
    Assets, end of year
    $2,921,825
  • Tax year 2024

    $325,000

    Grants listed
    18
    Assets, end of year
    $2,901,201
  • Tax year 2023

    $362,482

    Grants listed
    20
    Assets, end of year
    $2,908,017
  • Tax year 2022

    $347,000

    Grants listed
    18
    Assets, end of year
    $3,024,806
  • Tax year 2021

    $310,000

    Grants listed
    19
    Assets, end of year
    $3,333,931
  • Tax year 2020

    $291,500

    Grants listed
    32
    Assets, end of year
    $3,343,333
  • Tax year 2019

    $248,500

    Grants listed
    18
    Assets, end of year
    $2,819,340
  • Tax year 2018

    $230,000

    Grants listed
    20
    Assets, end of year
    $2,761,123

Grants paid in 2025

16 grants, largest first

As listed on the return.

  1. Eastern Bank No New England Wildlife CenterWeynmouth, MA

    General fund

    $135,000
  2. Dakin Humane SocietySpringfield, MA

    To support the kitten street team program

    $40,000
  3. Charles River Alleycats IncBoston, MA

    Assist with work in brockton, massachusetts

    $35,000
  4. MspcaBoston, MA

    Spay/neuter program cats from roxbury, dorchester, mattapan and hyde park

    $35,000
  5. Here Today Adopted TomorrowBrimfield, MA

    To fund spay/neuter services for 200 cats

    $21,000
  6. Berkshire Humane SocietyPittsfield, MA

    General

    $15,000
  7. Lowell Humane SocietyLowell, MA

    Help fund the outside testing cost for animals

    $15,000
  8. Paws WakefieldWakefield, MA

    To fund medical needs of cats and dogs in the wakefield and north of boston area

    $15,000
  9. Baypath Humane Society of Hopkinton Inc FBO to Support Dogs and CatsHopkinton, MA

    General fund

    $10,000
  10. Kitty AngelsTyngsborough, MA

    Provide medical assistance for seriously injured cats

    $10,000
  11. Friends of Marblehead Abandoned Animals FBO to Support Cats in LynnMarblehead, MA

    General fund

    $7,500
  12. Cape Ann Animal Aid FBO Support Dogs and Cats From Greater BostonGloucester, MA

    General fund

    $5,000
  13. Milton Animal League Inc FBO to Assist with Veterinary Care for Milton AnimMilton, MA

    General fund

    $5,000
  14. Scituate Animal ShelterScituate, MA

    Spay/neuter services to low income families on the south shore

    $5,000
  15. Second Chance Animal ServicesE Brookfield, MA

    General

    $5,000
  16. Cat Connection FBO General Operations in Greater Boston AreaBoston, MA

    General fund

    $1,500

Where the money goes

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

  1. Animals5 grants $85,000100% of the total

By State

Grants to organizations with a US address, latest year.

  1. Massachusetts16 grants $360,000

Officers, directors and trustees

2 people as filed

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

  • Wendy S HoldingTRUSTEE Hours 1Pay $14,447
  • David CuetosTRUSTEE Hours 1Pay $14,447

The return

More foundations

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Same main cause (animals), giving between a quarter and four times this foundation’s where possible, nearby first.

  1. Preservation of At-Risk Wildlife Paw FouBoston, MA 6 grants Preselected only $370,000 giving
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