· 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.
What you funded, over time
Every grant clustered by its grantee’s IRS cause code (NTEE), by year — across FY2019–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- $50k–250k4 grants · $500k
- $250k+7 grants · $3.4M
| Recipient | Amount |
|---|---|
| UNITED STATES ENERGY FOUNDATION | $750,000 |
| ARIZONA STATE UNIVERSITY FOUNDATION | $500,000 |
| HEALTH CARE WITHOUT HARM | $500,000 |
| SILICON SCHOOLS FUND INC | $500,000 |
| CERES | $500,000 |
| EDUCATORS FOR EXCELLENCE INC | $350,000 |
| TRANSCEND INC | $250,000 |
| ALDER GRADUATE SCHOOL OF EDUCATION | $200,000 |
| EDVOICE INSTITUTE | $100,000 |
| NEW SCHOOLS FUND | $100,000 |
| BAY EDUCATION FUND | $100,000 |
Do your dollars go where the need is?
Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.
Your human-services grants (FY22–23, $500k) land where the poverty rate runs at 8%, against an area that typically sits at 8%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.
US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.
Who you back again
Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +51% since the first grant, against +37% for the ones you funded once.
8 repeat relationships — 6 still active in FY2024, 2 since wound down; 5 grantees were first funded in FY2024 (too recent to call).
How the two cohorts compare
Organizations
Total granted
Median revenue growth · since first grant
Still filing today
New vs renewed · share of each year
In FY2024, 73% of grant dollars renewed an existing relationship; $1.1M went to new ones.
Where new relationships form · theme of each grantee’s first grant
First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). The earliest year is left-censored: relationships that predate the data read as “new.” Theme is the grantee’s IRS cause.
Backed again, and grew
UNITED STATES ENERGY FOUNDATION3× · 2022–2024 · $1.8M · revenue +96%
ARIZONA STATE UNIVERSITY FOUNDATION FOR A NEW AMERICAN UNIVERSITY2× · 2023–2024 · $1.1M · revenue +51%
EDUCATORS FOR EXCELLENCE INC2× · 2023–2024 · $700k · revenue +88%
Funded once
- TFTED FOUNDATION INCgraduatedone grant, 2022 · $50k · revenue +37%
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.
The organization provides professional investment management services for endowed gifts and financial assets entrusted to the ucsf foundation.
The association serves its members by creating resources that enable california school administrators to develop and apply creative leadership and management skills and in turn, improve the educational process for all students.
Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.
Provide post-secondary education of excellence.
The alliant educational foundation builds bridges between under-resourced communities, universities, and other organizations to create a more equitable, healthy, and just society.
The common application is a not-for-profit membership organization of over 1,100 colleges and universities across the globe committed to access, equity, and integrity in the college admission process. every year, over 1.5 million students…
Eff is a nonprofit social impact fund that believes all children deserve a quality education. we empower high-performing public charter schools with equitable access to low-cost, long-term financing by innovatively combining…
American gas association's (the association) mission is to develop and advocate for informed, innovative, and durable policy that fulfills our nation's energy needs, environmental aspirations and economic potential. we are committed to…
We believe that great schools are the cornerstone of a just and thriving community. ensuring that every child is able to attend a school that works is our moral and social imperative - our children deserve no less.
Central indiana corporate partnership (cicp) is an alliance of indiana's business and research university leaders coming together to foster long-term prosperity for the region. cicp's mission is to transform the economy of indiana in order…
The mission of the uc davis foundation is to secure, steward and manage private gifts for uc davis.
See schedule okqed serves the people of northern california with a community-supported alternative to commercial media, providing the knowledge needed to make informed decisions; convening community dialogue; bringing the arts to everyone;…
For reference, the grantee most central to the portfolio’s shape is Transcend Inc and the most unlike its peers is Ted Foundation Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
15 grantees tracked through their own filings, 2017–2025.
Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.
Counted here: distinct organizations you funded across 2017–2025, not grant rows in a single year — so this will not match the grant count on the cover. 15 of the 16 grantees resolved in that span have returns of their own we could reconcile; the rest are funded organizations whose filings we could not track year by year.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
Go grantee by grantee — a decade per org, and how each moved after you funded them
A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.
- Who funds FIDELITY INVESTMENTS CHARITABLE GIFT FUND ↗
- Who funds UNITED STATES ENERGY FOUNDATION ↗
- Who funds ARIZONA STATE UNIVERSITY FOUNDATION FOR A NEW AMERICAN UNIVERSITY ↗
- Who funds CERES INC ↗
- Who funds HEALTH CARE WITHOUT HARM ↗
- Who funds EDUCATORS FOR EXCELLENCE INC ↗
- Who funds PRIME COALITION INC ↗
- Who funds SILICON SCHOOLS FUND INC ↗
- Who funds ACTIVATE GLOBAL INC ↗
- Who funds ALDER GRADUATE SCHOOL OF EDUCATION ↗
- Who funds TRANSCEND INC ↗
- Who funds ROCKEFELLER PHILANTHROPY ADVISORS INC ↗
- Who funds Bay Education Fund ↗
- Who funds NEW SCHOOLS FUND ↗
- Who funds TED FOUNDATION INC ↗
The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.
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
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.
Government reliance of your grantees
Every dot is one organization Tandem Philanthropies Fka the Ark Foundation funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal, a single department, or state — and drag the year to watch it move.
- Ceres Inc — 0% of income from government
Government income is each org’s traced federal awards (USASpending — grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that your grant caused the public funding. Coverage is precision-first — a floor, not a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12–24 months.