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California · Private foundation

Tandem Philanthropies Fka the Ark Foundation

Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$3.9M
Granted FY2024(still arriving)
11
Grants FY2024
8
Organizations funded FY2023
63%
First-time grantees FY2023
Read the full brief
Median grant, FY2024
$350,000
Largest grant, FY2024
$750,000
Organizations funded a year
4 to 8
FY2022 to FY2023
States reached, FY2024
5
Total assets, FY2024
$74M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2023, 63% of the organizations Tandem Philanthropies Fka the Ark Foundation funded were first-time grantees, receiving 64% of its grant dollars.

The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2024still arriving11$3.9M45%
FY20238$2.8M63%
FY20224$1.1Mn/a
100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2019 to 2024.

Environment$3.8MEducation$3.4MPhilanthropy$2.9MScience & Tech$500kCommunity Improvement$50k

Top grantees

Largest recipients by total granted, FY2022 to FY2024, and the share of each one’s budget the grants supplied at peak.

Show all 13 grantees
All grantees of Tandem Philanthropies Fka the Ark Foundation by total granted
GranteeTotal grantedYearsShare of their budget
United States Energy Foundation$1,750,00030%
Arizona State University Foundation for a New American University$1,100,00020%
Ceres Inc$750,80021%
Health Care Without Harm$750,00026%
Educators for Excellence Inc$700,00025%
Activate Global Inc$500,00021%
Prime Coalition Inc$500,00023%
Alder Graduate School of Education$500,00021%
Silicon Schools Fund Inc$500,00016%
Transcend Inc$250,00011%
Bay Education Fund$100,00012%
New Schools Fund$100,00010%
Ted Foundation Inc$50,00010%

What it could do for these grantees

Plus 1 recipient with no EIN on record ($100k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget Tandem Philanthropies Fka the Ark Foundation supplied at peak.

25%50%75%100%$10M$100Mgrantee revenue →↑ funder's share of their budgetUnited States Energy Foundation: $1,750,000 over 3y, 0.4% of budgetArizona State University Foundation for a New American University: $1,100,000 over 2y, 0.2% of budgetCeres Inc: $750,800 over 2y, 1.2% of budgetHealth Care Without Harm: $750,000 over 2y, 5.9% of budgetEducators for Excellence Inc: $700,000 over 2y, 5.2% of budgetActivate Global Inc: $500,000 over 2y, 1.4% of budgetPrime Coalition Inc: $500,000 over 2y, 2.5% of budgetAlder Graduate School of Education: $500,000 over 2y, 1.4% of budgetSilicon Schools Fund Inc: $500,000 over 1y, 6.1% of budgetTranscend Inc: $250,000 over 1y, 0.8% of budgetBay Education Fund: $100,000 over 1y, 1.5% of budgetNew Schools Fund: $100,000 over 1y, 0.2% of budgetTed Foundation Inc: $50,000 over 1y, 0.1% of budget

Tap a dot to name the grantee.

How this is measured
Share of budget is the funder’s grant in a year over the grantee’s total revenue that year, at its highest across the years we hold; revenue is from all sources. Only grantees confirmed against their own filings, whose grants do not exceed their revenue, are plotted: the largest 13.

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

Silicon Valley Community FoundationCA18.8× affinity8 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Silicon Valley Community Foundation · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · Charles and Helen Schwab Foundation · Walton Family Foundation Inc · Gates Foundation · The William & Flora Hewlett Foundation · Marin Community Foundation · Give Forward Foundation · Overdeck Family Foundation Inc · Chan Zuckerberg Initiative Foundation · Skyline Foundation · Boston Foundation Inc

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

Compare Tandem Philanthropies Fka the Ark Foundation with peer funders

About Tandem Philanthropies Fka the Ark Foundation

How much does Tandem Philanthropies Fka the Ark Foundation give?
Tandem Philanthropies Fka the Ark Foundation reported 11 grants totaling $3,850,000 in its FY2024 IRS filing. It funded between 4 and 8 organizations a year over FY2022 to FY2023.
What does Tandem Philanthropies Fka the Ark Foundation fund?
By grant dollars over FY2022 to FY2024, its largest causes are Environment (36%), Education (32%), Philanthropy (27%).
Who are Tandem Philanthropies Fka the Ark Foundation's largest grantees?
By total granted over FY2022 to FY2024: United States Energy Foundation ($1.8M), Arizona State University Foundation for a New American University ($1.1M), Ceres Inc ($751k).
Does Tandem Philanthropies Fka the Ark Foundation fund new organizations?
In FY2023, 63% of the organizations it funded were first-time grantees.
Does Tandem Philanthropies Fka the Ark Foundation accept unsolicited applications?
Its most recent filing reports that it funds preselected organizations and does not take unsolicited requests. Check the foundation's own site before ruling it out.
Which funders back the same organizations as Tandem Philanthropies Fka the Ark Foundation?
Its strongest co-funders, measured against what their size predicts, include Silicon Valley Community Foundation, Gs Donor Advised Philanthropy Fund for Wealth Management Inc, Charles and Helen Schwab Foundation.
Where is Tandem Philanthropies Fka the Ark Foundation based?
Tandem Philanthropies Fka the Ark Foundation is based in CA.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 16 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

Generated from the IRS Form 990-PF e-file return for fiscal year 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

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