· Private foundation
The Zierk Family Foundation
Its FY2025 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 placed by its stated purpose and the recipient’s mission, by year — across FY2017–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k2 grants · $10k
- $10k–50k5 grants · $110k
- $50k–250k6 grants · $455k
- $250k+1 grant · $2.6M
| Recipient | Amount |
|---|---|
| ST MARK'S SCHOOL OF TEXAS | $2,600,000 |
| HOOVER INSTITUTION | $100,000 |
| US OLYMPIC COMMITTE | $100,000 |
| UT SOUTHWESTERN MEDICAL CENTER (UTSW) | $100,000 |
| MONTEREY PENINSULA FOUNDATION | $55,000 |
| UNITED TO LEARN | $50,000 |
| TEACH FOR AMERICA DALLAS | $50,000 |
| NORTH TEXAS FOOD BANK | $25,000 |
| TEXAS 2036 | $25,000 |
| CHRIST THE KING CATHOLIC CHURCH (DALLAS) | $25,000 |
| Individual grant recipient | $25,000 |
| ST MICHAEL THE ARCHANGEL CHURCH | $10,000 |
| KUKIO HO'OMANA FUND | $5,000 |
| THE DALLAS FOUNDATION | $5,000 |
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 (FY17–20, $225k) land where the poverty rate runs at 15%, 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.
Which US states your grants reach
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 +35% since the first grant, against +29% for the ones you funded once.
31 repeat relationships — 9 still active in FY2025, 22 since wound down; 3 grantees were first funded in FY2025 (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 FY2025, 94% of grant dollars renewed an existing relationship; $175k 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
- SMST MARK'S SCHOOL OF TEXAS6× · 2020–2025 · $13M · revenue +2%
- RREDF7× · 2017–2023 · $2.5M · revenue +89%
- HPHAWAII PREPARATORY ACADEMY4× · 2017–2020 · $2.4M · revenue +24%
Funded once
- NNHCHone grant, 2017 · $1.0M
SYRACUSE UNIVERSITYgraduatedone grant, 2019 · $125k · revenue +29%- UUCSFone grant, 2017 · $100k
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.
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.
The peak school seeks to ignite a passion for learning, to develop students of diverse talents and backgrounds who think critically and act with integrity, and to graduate compassionate, confident, capable students who will embrace their…
Guided by the principles of academic rigor and diversity, the international school of san francisco offers programs of study in french and english to prepare its graduates for a world in which the ability to think critically and to…
The primary mission of furman as a liberal arts institution is to provide a distinctive education in fine arts, humanities, social sciences, mathematics and the sciences, as well as selected professional disciplines.
We take a joyful, community-oriented approach to raising engaged citizens, deep learners, and brave adventurers with the skills, creativity, and heart needed to better the world.
A diverse and sustainable learning community dedicated to discovery and excellence in teaching, scholarship and practice, pacific university inspires students to think, care, create and pursue justice in our world.
Presidio hill school is a co-ed k-8 independent, progressive school. learning is collaborative and an active experience with an emphasis on inquiry. students are engaged in their own learning and guided by an expert faculty through a…
The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.
The mission of south shore charter school is to cultivate students the tenacity, integrity, and curiosity needed to become innovative and socially responsible leaders, ready to face and solve the ever-changing challenges facing our…
At san francisco friends school, students learn in a community grounded in the quaker values of reflection, integrity, peaceful problem-solving and stewardship. our teachers challenge students with a dynamic curriculum that inspires…
As the largest association of independent schools, nais co-creates the future of education by uniting and empowering our community. we do this through thought leadership, research, creation and curation of resources, and direct…
As a christian university, we provide education and research opportunities preparing global leaders to partner with local communities.
For reference, the grantee most central to the portfolio’s shape is St Mark's School of Texas and the most unlike its peers is Grace Science Foundation. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
For each theme you fund, this compares how the sector’s money is shifting with how your own giving is shifting.
Sector change and giving change are each shown relative to their own range, growing (right) or shrinking (left); both normalized, so inflation isn’t mistaken for growth.
Your grantees are a median of 30 years old; the field is 12. You back the established end — and your money leans older still.
The field is 26% startups (under 5 years old) — 0% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 15% of the field you don’t fund.
Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.
40 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. 40 of the 65 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 ST MARK'S SCHOOL OF TEXAS ↗
- Who funds REDF ↗
- Who funds HAWAII PREPARATORY ACADEMY ↗
- Who funds NORTH TEXAS FOOD BANK ↗
- Who funds SOUTHWESTERN MEDICAL FOUNDATION ↗
- Who funds THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY ↗
- Who funds TIPPING POINT COMMUNITY ↗
- Who funds THE DALLAS FOUNDATION ↗
- Who funds UNITED TO LEARN ↗
- Who funds PHILLIPS EXETER ACADEMY ↗
- Who funds MONTEREY PENINSULA FOUNDATION ↗
- Who funds THE JIM SAUNDERS FUND ↗
- Who funds SYRACUSE UNIVERSITY ↗
- Who funds THE CRYSTAL CHARITY BALL ↗
- Who funds HAWAII COMMUNITY FOUNDATION ↗
- Who funds NORTH DALLAS SHARED MINISTRIES INC ↗
- Who funds MAKUA LANI CHRISTIAN ACADEMY ↗
- Who funds Texas 2036 ↗
- Who funds Teach for America Inc ↗
- Who funds BOYS AND GIRLS CLUB OF THE BIG ISLAND ↗
- Who funds CAFE MOMENTUM ↗
- Who funds THE TEAK FELLOWSHIP INC ↗
- Who funds GRACE SCIENCE FOUNDATION ↗
- Who funds INSTITUTE FOR ADVANCED STUDY - LOUIS BAMBERGER & MRS FELIX FULD FOUNDATION ↗
- Who funds CHILD MIND INSTITUTE INC ↗
- Who funds NOTRE DAME OF DALLAS SCHOOLS FOUNDATION INC ↗
- Who funds KOKUA CHRISTIAN MINISTRIES ↗
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: The Roberts Foundation · The Ayco Charitable Foundation · Atherton Family Foundation · United Way of Metropolitan Dallas Inc · The Hoglund Foundation · The Dallas Foundation · Jewish Community Federation of San Francisco the Peninsula Marin & Sonoma · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · Marin Community Foundation · The Goldman Sachs Charitable Gift Fund · The San Francisco Foundation · The Hoak Foundation
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 The Zierk Family 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 or a single department — and drag the year to watch it move.
- Institute for Advanced Study - Louis Bamberger & Mrs Felix Fuld Foundation — 7% 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.