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The Zierk Family Foundation at a glance

· 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.

$3.2M
Granted FY2025still arriving
14
Grants FY2025still arriving
4
States reached
$2.6M
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
01100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Education$17MEmployment$2.5MHealth$1.7MReligion$1.6MRecreation & Sports$751kFood & Nutrition$560kPhilanthropy$460kHuman Services$330kOther$0
02FY2025 · 14 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k2 grants · $10k
  • $10k–50k5 grants · $110k
  • $50k–250k6 grants · $455k
  • $250k+1 grant · $2.6M
$50,000
Median grant
4
States reached
$41M
Total assets
Largest grants
RecipientAmount
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
TEACH FOR AMERICA DALLAS$50,000
UNITED TO LEARN$50,000
Individual grant recipient$25,000
NORTH TEXAS FOOD BANK$25,000
CHRIST THE KING CATHOLIC CHURCH (DALLAS)$25,000
TEXAS 2036$25,000
ST MICHAEL THE ARCHANGEL CHURCH$10,000
THE DALLAS FOUNDATION$5,000
KUKIO HO'OMANA FUND$5,000
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Its 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 its grants land in higher-need ZIPs.

area typical 8%TEAK FELLOWSHIP: $50k → 17%SMALL WORLD PRESCHOOL: $15k → 15%KOKUA CHRISTIAN MINISTRIES: $15k → 15%KOKUA CHRISTIAN MINISTRIES: $10k → 15%WESLEY-RANKIN COMMUNITY CENTER: $25k → 14%KOKUA CHRISTIAN MINISTRIES: $10k → 15%NORTH DALLAS SHARED MINISTRIES: $100k → 14%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.

Which US states its grants reach

NH
IL
NY
NJ
CT
CA
CO
VA
HI
TX
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

92%of every dollar goes to organizations it has funded before.
$23M · 31 repeat orgs$2.0M to everyone else

Grantees it renews have grown median revenue +35% since the first grant, against +24% for those 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

Re-uppedFunded once

Organizations

31
28

Total granted

$23M
$1.8M

Median revenue growth · since first grant

+35%
+24%

Still filing today

61%
57%

New vs renewed · share of each year

In FY2025, 94% of grant dollars renewed an existing relationship; $175k went to new ones.

50%100%’17’18’19’20’21’22’23’24’25
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’17’18’19’20’21’22’23’24’25
EducationPhilanthropyHuman ServicesHealthArts & CultureYouth DevelopmentOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). 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

  • SM
    ST MARK'S SCHOOL OF TEXAS
    6× · 2020–2025 · $13M · revenue +2%
  • R
    REDF
    7× · 2017–2023 · $2.5M · revenue +89%
  • HP
    HAWAII PREPARATORY ACADEMY
    4× · 2017–2020 · $2.4M · revenue +24%

Funded once

  • N
    NHCH
    one grant, 2017 · $1.0M
  • SYRACUSE UNIVERSITYgraduated
    one grant, 2019 · $125k · revenue +29%
  • U
    UCSF
    one grant, 2017 · $100k
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
United States Naval Institute

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.

—
2
The Peak School

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…

Education
3
The International School of San Francisco

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…

Education
4
Furman University

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.

Education
5
University Cooperative School

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.

—
6
Pacific University

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.

Education
7
Presidio Hill School

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…

Education
8
Massachusetts Institute of Technology

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.

Education
9
South Shore Charter School

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…

Education
10
San Francisco Friends School

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…

Education
11
National Association of Independent Schools Inc

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…

—
12
Dallas International University

As a christian university, we provide education and research opportunities preparing global leaders to partner with local communities.

Education
How this is measured
The grantee most central to the portfolio’s shape is St Mark's School of Texas; 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.
04the grantee network

40 grantees tracked through their own filings, 2017–2025.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 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.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
7
Early backer (in before they grew)
38/40
Grantees still filing
31/40
Grew since first funded

Where the money sits, by cause and then by grantee

ST MARK'S SCHOOL OF TEXAS: $13,000,000 · EducationST MARK'S SCHOOL OF TEXASHAWAII PREPARATORY ACADEMY: $2,390,676 · EducationHAWAII PREPARATORY ACADEMY+9 more: $1,532,500 · Education+9 moreST MICHAEL THE ARCHANGEL CHURCH: $1,153,000 · OtherST MICHAEL THE ARCHAN…NHCH: $1,000,000 · OtherNHCHIndividual grant recipient: $610,000 · OtherIndividual grant reci…NORTH TEXAS FOOD BANK: $525,000 · OtherNORTH TEXAS FOOD BANKCHRIST THE KING CATHOLIC CHURCH (DALLAS): $275,000 · OtherCHRIST THE KING CATHO…UT SOUTHWESTERN MEDICAL CENTER (UTSW): $250,000 · Other+28 more: $955,900 · Other+28 moreREDF: $2,500,000 · PhilanthropyREDFTIPPING POINT COMMUNITY: $300,000 · PhilanthropyTIPPING POINT C…THE DALLAS FOUNDATION: $205,000 · PhilanthropyTHE DALLAS FOUN…MONTEREY PENINSULA FOUNDATION: $140,000 · PhilanthropyTHE JIM SAUNDERS FUND: $125,000 · Philanthropy+3 more: $225,000 · Philanthropy+3 moreNORTH DALLAS SHARED MINISTRIES INC: $100,000 · Human ServicesTHE TEAK FELLOWSHIP INC: $50,000 · Human ServicesKOKUA CHRISTIAN MINISTRIES: $35,000 · Human ServicesWESLEY-RANKIN COMMUNITY CENTER INC: $25,000 · Human ServicesSmall World Preschool Corporation: $15,000 · Human ServicesGRACE SCIENCE FOUNDATION: $50,000 · HealthCHILD MIND INSTITUTE INC: $35,000 · HealthSide By Side: $10,000 · HealthCSNK2A1 FOUNDATION: $10,000 · HealthCAFE MOMENTUM: $50,000 · Youth DevelopmentBOYS AND GIRLS CLUB OF THE BIG ISLAND: $50,000 · Youth DevelopmentTexas 2036: $75,000 · Public Benefit
Education$16,923,176Other$4,768,900Philanthropy$3,495,000Human Services$225,000Health$105,000Youth Development$100,000Public Benefit$75,000

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetST MARK'S SCHOOL OF TEXAS: $13,000,000 over 6y, 5.6% of budgetREDF: $2,500,000 over 7y, 5.0% of budgetHAWAII PREPARATORY ACADEMY: $2,390,676 over 4y, 7.3% of budgetNORTH TEXAS FOOD BANK: $525,000 over 6y, 0.1% of budgetSOUTHWESTERN MEDICAL FOUNDATION: $500,000 over 3y, 1.0% of budgetTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $400,000 over 5y, 0.0% of budgetTIPPING POINT COMMUNITY: $300,000 over 3y, 0.2% of budgetTHE DALLAS FOUNDATION: $205,000 over 6y, 0.1% of budgetUNITED TO LEARN: $160,000 over 6y, 0.9% of budgetPHILLIPS EXETER ACADEMY: $150,000 over 3y, 0.0% of budgetMONTEREY PENINSULA FOUNDATION: $140,000 over 3y, 0.3% of budgetTHE JIM SAUNDERS FUND: $125,000 over 2y, 14% of budgetSYRACUSE UNIVERSITY: $125,000 over 1y, 0.0% of budgetTHE CRYSTAL CHARITY BALL: $110,000 over 2y, 1.1% of budgetHAWAII COMMUNITY FOUNDATION: $100,000 over 6y, 0.0% of budgetNORTH DALLAS SHARED MINISTRIES INC: $100,000 over 1y, 1.7% of budgetMAKUA LANI CHRISTIAN ACADEMY: $85,000 over 3y, 1.4% of budgetTexas 2036: $75,000 over 2y, 0.7% of budgetTeach for America Inc: $75,000 over 2y, 0.0% of budgetTHE TEAK FELLOWSHIP INC: $50,000 over 1y, 0.9% of budgetCAFE MOMENTUM: $50,000 over 1y, 1.5% of budgetGRACE SCIENCE FOUNDATION: $50,000 over 2y, 2.8% of budgetBOYS AND GIRLS CLUB OF THE BIG ISLAND: $50,000 over 1y, 2.2% of budgetINSTITUTE FOR ADVANCED STUDY - LOUIS BAMBERGER & MRS FELIX FULD FOUNDATION: $50,000 over 1y, 0.1% of budgetNOTRE DAME OF DALLAS SCHOOLS FOUNDATION INC: $35,000 over 2y, 4.5% of budgetCHILD MIND INSTITUTE INC: $35,000 over 2y, 0.1% of budgetNAVY SEAL FOUNDATION INC: $25,000 over 1y, 0.1% of budgetWESLEY-RANKIN COMMUNITY CENTER INC: $25,000 over 1y, 2.0% of budgetMI ESCUELITA PRESCHOOL INC: $25,000 over 1y, 0.4% of budgetDallas Museum of Art: $20,000 over 1y, 0.0% of budgetHUI ALOHA KIHOLO: $20,000 over 2y, 6.5% of budgetSmall World Preschool Corporation: $15,000 over 1y, 3.1% of budgetKUKIO HOOMANA FUND: $15,000 over 3y, 0.4% of budgetKAUAI FOOD BANK INC: $10,000 over 1y, 1.1% of budgetSide By Side: $10,000 over 1y, 0.1% of budgetCSNK2A1 FOUNDATION: $10,000 over 1y, 2.4% of budgetFRIENDS OF UNITED HATZALAH INC: $10,000 over 1y, 0.0% of budgetCORNERSTONE CROSSROADS ACADEMY: $2,500 over 1y, 0.2% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, 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 THE TEAK FELLOWSHIP INC ↗
  • Who funds CAFE MOMENTUM ↗
  • Who funds GRACE SCIENCE FOUNDATION ↗
  • Who funds BOYS AND GIRLS CLUB OF THE BIG ISLAND ↗
  • Who funds INSTITUTE FOR ADVANCED STUDY - LOUIS BAMBERGER & MRS FELIX FULD FOUNDATION ↗
  • Who funds KOKUA CHRISTIAN MINISTRIES ↗
  • Who funds NOTRE DAME OF DALLAS SCHOOLS FOUNDATION INC ↗
  • Who funds CHILD MIND INSTITUTE INC ↗

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.

The Roberts FoundationThe Ayco Charitable F…Atherton Family Found…United Way of Metropo…The Hoglund FoundationThe Dallas FoundationJewish Community Fede…Gs Donor Advised Phil…Marin Community Found…The Goldman Sachs Cha…The San Francisco Fou…The Hoak Foundation
The Roberts FoundationCA22.1× affinity8 shared granteesties to 8 of 11Hover any node to trace its alignments.Compare side by side →

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

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.

How much its grantees rely on government

Each dot is one organization The Zierk Family Foundation funds: left to right is the share of its income from government, bottom to top the share from The Zierk Family Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 00%1%4%8%15%funder's share of their income ↑0%10%20%30%40%share of the org’s income from government →median 7%
  • Institute for Advanced Study - Louis Bamberger & Mrs Felix Fuld Foundation: 7% of income from government
no gov moneyreceives it· size = income
0get no government money at all
9report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–40%
typical government reliance, FY20–25
How this is measured
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 a grant caused the public funding. Coverage is precision-first, a floor rather than 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 to 24 months.

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 65 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 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Zierk Family’s filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home