Interlaken Foundation

Private foundation · EIN 52-2339479 · since 2002·United States·Updated 13 October 2026

At a glance

$18.4M
Annual giving, 2024 tax year
From the Form 990-PF filing
$200k to $10M
Grant range
From grants in the 990-PF filings
$3.8M
Typical grant (median)
4 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 filing says the foundation does not accept unsolicited requests and works by invitation only, so a cold application is unlikely to be considered; the realistic first step is an introduction or a relationship with someone connected to it.
  • Its giving is heavily repeat: 95% of its grant dollars to organisations in the latest filing went to organisations it had also funded in an earlier filing, so a new applicant may find the path difficult.
  • Half of its 14 grants to organisations were $1,000,000 or less, and about 8 in 10 fall between $200,000 and $10,000,000, so a request sized within that typical band would sit with its usual grants, while the largest, about $10,500,000, is not a ceiling.
  • The filing states no geographic focus and no purpose narrower than charitable use, though its recorded recipients include wildlife-conservation organisations and community foundations, so compare your work with those examples before reaching out; the filing does not say when it makes decisions, so do not plan around a timetable it has not published.

Overview

Interlaken Foundation is a US private foundation based in New York, NY.

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

Its filings describe the grants as being for recipients' charitable use, without stating a narrower purpose. The recorded recipients include wildlife-conservation organisations and community foundations, alongside other charitable organisations. Its giving is concentrated among a small set of repeat recipients: most of the latest filing's organisation-grant dollars went to organisations supported in an earlier filing. In the grant record, California received the largest share, followed by the District of Columbia. The filings do not state a broader funding theme, who is eligible to apply, or a public route for making a request.

Geographic Focus

No geographic focus is stated; the filings show grants spread across the United States.

How to apply

The foundation states that it does not accept unsolicited requests.

Application success factors

  • Repeat giving: In its TY2024 filing, 95% 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 14 grants to organisations were $1,000,000 or less.

Where grants go

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

Grant dollars by state

California81%
District of Columbia16%
Colorado1%
Massachusetts<1%
New Hampshire<1%
  • The largest single recipient received 45% of grant dollars to organisations.
  • In tax year 2024, 95% of grant dollars went to organisations Interlaken Foundation had funded in earlier filings.
  • No grants were paid directly to organisations outside the US.
  • 97% of grant dollars went to intermediaries that regrant to other organisations.

Grants

4 grants in the latest filing analysed · median $3.8M

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

  • Wildlife Conservation Network · For organization's charitable use
    $10,550,0002024 tax year
  • Community Foundation of Santa Cruz County · For organization's charitable use
    $7,000,0002024 tax year
  • Unite America Institute · For organization's charitable use
    $600,0002024 tax year
  • Rank the Vote · For the organization's charitable use
    $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

  • Christopher Wilmers — President

From the latest Form 990-PF filing

3 years of tax filings

YearTotal expensesGrants paidAssetsFiling document
2022 tax year$20,403,825$17,500,000$349,677,287Filing for 2022 tax year
2023 tax year$20,117,273$16,600,000$379,103,853Filing for 2023 tax year
2024 tax year$22,258,233$18,400,000$399,504,086Filing 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

  • New York, NY