Skip to content
Plinth
Foundation Dossiers
Plinth

· Private foundation

Mark & Amy Tercek 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.

$620k
Granted FY2025still arriving
45
Grants FY2025still arriving
12
States reached
$100k
Largest
01What you fundRead
02The needRead
03Your edgeRead
04Your fieldRead
01What you fund
0192% classified

What you funded, over time

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

Philanthropy$4.4MEnvironment$901kSocial Science$110kEducation$104kYouth Development$88kReligion$69kRecreation & Sports$35kHealth$29kOther$0
02FY2025 · 45 grants

Where the money goes

Your grants by size, and where they go.

The 45 grants below total $487,123 — the rows itemised in this filing. The $620,123 headline is the total grant expense reported on the return, so the remaining $133,000 is giving the schedule does not break out: grants under the $5,000 itemisation floor, grants to individuals, and grants reported on other schedules. Every figure below describes the itemised rows only.

By grant size · FY2025

  • Under $10k35 grants · $121k
  • $10k–50k8 grants · $168k
  • $50k–250k2 grants · $199k
$5,000
Median grant
12
States reached
$7.4M
Total assets
Largest grants
RecipientAmount
Blue Forest Finance Inc$100,000
The Conservation Fund A Nonprofit Corporation$99,123
Budo Accelerator Inc$37,500
Harvard Business School Christian Fellowship Alumni Association Inc$30,000
Harvard Business School Christian Fellowship Alumni Association Inc$25,000
Sconset Trust Inc$25,000
Junior Tennis Champions Center Inc$20,000
Williams College$10,000
The Stepping Stones Foundation$10,000
WholeSchool Mindfulness Inc$10,000
Western Reserve Academy$7,500
Sankaty Head Foundation Inc$5,000
Conservation International Foundation$5,000
Acumen Fund Inc$5,000
Community Foundation for Nantucket$5,000
02The need
03

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.

show:

Dollar for dollar, your grants (FY17–23) land where the poverty rate runs at 13%, against an area that typically sits at 10%. 73% of your dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.

area typical 10%SCONSET TRUST INC: $50k → 6%WHOLESCHOOL MINDFULNESS: $5k → 7%HARVARD BUSINESS SCHOOL: $110k → 8%WILLIAMS COLLEGE: $10k → 12%BUDO ACCELERATOR: $50k → 10%WORK ON CLIMATE: $5k → 10%NEXTGEN CLIMATE AMERICA INC: $5k → 10%THE HELENA GROUP FOUNDATION: $10k → 14%SEE ATTACHED LIST: $737k → 7%NEW YORK UNIVERSITY: $10k → 17%RESOURCES FOR THE FUTURE: $10k → 14%ENVIRONMENTAL LEARNING CENTER FOUNDATION INC: $5k → 12%RENAISSANCE CHARITABLE FOUNDATION (SEE ATTACHED): $4.4M → 16%WESTERN RESERVE ACADEMY: $8k → 13%THE NATURE CONSERVANCY: $250k → 7%SEE ATTACHED LIST: $222k → 7%ACUMEN FUND: $10k → 17%RESOURCES FOR THE FUTURE: $5k → 14%THE NATURE CONSERVANCY: $200k → 7%SEE ATTACHED LIST: $110k → 7%RESOURCES FOR THE FUTURE: $5k → 14%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount

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

NY
MA
IN
OH
CA
VA
DC
FL

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.

03Your edge
repeat funding

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.

47%of every dollar goes to organizations you’ve funded before.
$437k · 30 repeat orgs$487k to everyone else

30 repeat relationships — 29 still active in FY2025, 1 since wound down; 12 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

30
13

Total granted

$437k
$198k

Median revenue growth · since first grant

0%
0%

Still filing today

83%
85%

New vs renewed · share of each year

In FY2025, 39% of grant dollars renewed an existing relationship; $289k went to new ones.

50%100%’18’23’24’25
RenewedFirst-time

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

’18’23’24’25
EnvironmentEducationArts & CultureInternationalRecreation & SportsCommunity ImprovementOther

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

  • BA
    BUDO ACCELERATOR INC
    2× · 2023–2025 · $88k · revenue +59% · 41% of their budget
  • 'T
    'SCONSET TRUST INC
    3× · 2023–2025 · $76k · revenue +645%
  • Williams College
    3× · 2023–2025 · $40k · revenue +25%

Funded once

  • HB
    HARVARD BUSINESS SCHOOL
    one grant, 2023 · $110k
  • SM
    SUSTAINABLE MARKETS FOUNDATION
    one grant, 2024 · $50k · revenue 0%
  • HG
    HELENA GROUP FOUNDATION
    one grant, 2018 · $10k · revenue -72%

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

04Your field

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.

1
Rainforest Trust

Rainforest trust saves endangered wildlife and protects our planet by creating rainforest reserves through partnerships, community engagement, and donor support.

International
2
National Fish and Wildlife Foundation

To sustain, restore, and enhance the nation's fish, wildlife, plants, and habitats.

Animals
3
The Water Research Foundation

The purpose of the water research foundation (wrf) is a definitive research organization to advance the science of all things water to better meet the evolving needs of its subscribers and the water sector. to engage exclusively in…

Environment
4
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.

—
5
Friends of the Earth

Friends of the earth strives for a more healthy and just world by defendng the environment and human health while advancing social and economic justice by conducting research and education, transforming the economy so it protects the…

Environment
6
Environmental Investigation Agency

To establish and promote programs to protect the global climate, forests, wildlife and the natural environment, through research, advocacy, and investigation.

International
7
Environment Next Inc

Environment next supports individuals, nonprofits and businesses around the world on solutions to complex climate issues. we provide leadership, outreach and communication support, grants, and investments to empower leaders and their ideas…

Environment
8
The Union of Concerned Scientists Inc

The union of concerned scientists puts rigorous, independent science into action, developing solutions and advocating for a healthy, safe, and just future.

International
9
Cdp North America Inc

Cdp north america, inc. 's ("cdp-na") vision for the future is a thriving economy that works for people and planet in the long term. we focus investors and companies on taking urgent action to build a truly sustainable economy by measuring…

Environment
10
Sustainable Conservation Inc

Sustainable conservation, inc works with the conservation fund, a nonprofit corporation, to create partnerships with the private, nonprofit, and public sectors to protect the outdoor heritage of the united states.

Environment
11
Rainforest Foundation Inc

The purpose of rainforest foundation us is to support indigenous peoples and forest communities in their efforts to secure their lands, protect their environment, and uphold their rights.

Environment
12
Hudson River Foundation for Science and Environmental Research Inc

The mission of the hudson river foundation is to inspire and inform action through science and engaging people to enhance the hudson river, estuary, and watershed (see schedule o).

Environment

For reference, the grantee most central to the portfolio’s shape is The Conservation Fund a Nonprofit Corporation and the most unlike its peers is Miss Frans Helping Hands of Indian. 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.

← shrinkinggrowing →↓ leaning in → pulling backsteadyYouth Sports ProgramsFaith-Based Liberal Arts Co…Charter and Independent Sch…Christian Youth CampsCommunity FoundationsClassical Music OrchestrasEducation Equity InitiativesPrivate Grantmaking Foundat…Community Theater CompaniesLocal History MuseumsEnvironmental Advocacy and …
the sector your giving your giving is ahead of the sector the sector’s ahead of you· dot size = how much the theme matters to each side
Ordered by the change in your giving — leaning in on top, pulling back at the bottom. The bar between the two dots is how out of step you are with the sector. Hover any row for detail.

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 33 years old; the field is 20. You back the established end — and your money leans older still.

THE FIELDby orgYOUR GRANTEESby number19%4%<5yr13%9%5–10yr18%9%10–20yr14%28%20–35yr13%30%35–55yr23%19%55yr+
THE FIELDby orgYOUR MONEYby value19%1%<5yr13%17%5–10yr18%7%10–20yr14%12%20–35yr13%22%35–55yr23%41%55yr+

The field is 19% startups (under 5 years old) — 4% of your grantees by number, and just 1% of your money.

Closures · last 5 years

The orgs you fund almost never close — 0.0% lost their exemption, against 10% of the field you don’t fund.

orgs you fund
0.0%0/53
the rest of the field
10%
4,324/41,942

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.

04the grantee network

49 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. 49 of the 58 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.

1
Load-bearing (≥25% of a budget)
6
Early backer (in before they grew)
49/49
Grantees still filing
20/49
Grew since you first funded

Where your money sits — by cause, then by grantee

THE NATURE CONSERVANCY — $450,000 · OtherTHE NATURE CONSERVANCYHARVARD BUSINESS SCHOOL — $110,000 · OtherHARVARD BUSINESS SCHOOLHarvard Business School Christian Fellowship Alumni Association Inc — $55,000 · OtherHarvard Business School Christian Fellowship Alumni Assoc…+20 more — $105,000 · Other+20 moreBLUE FOREST FINANCE INC — $100,000 · EnvironmentBLUE FOREST FINANCE INCTHE CONSERVATION FUND A NONPROFIT CORPORATION — $99,123 · EnvironmentTHE CONSERVATION FUND A NONPROFIT …'SCONSET TRUST INC — $76,000 · Environment'SCONSET TRUST INCSUSTAINABLE MARKETS FOUNDATION — $50,000 · EnvironmentSUSTAINABLE MARKETS FOUNDATIONResources for the Future Inc — $40,000 · EnvironmentResources for the Future Inc+12 more — $70,000 · Environment+12 moreBUDO ACCELERATOR INC — $87,500 · Recreation & SportsJUNIOR TENNIS CHAMPIONS CENTER INC — $22,500 · Recreation & SportsWilliams College — $40,000 · EducationWESTERN RESERVE ACADEMY — $22,500 · EducationWholeSchool Mindfulness Inc — $15,000 · EducationNew York University — $15,000 · EducationDUKE UNIVERSITY — $5,000 · Education+1 more — $2,000 · EducationACUMEN FUND INC — $25,000 · InternationalCOUNCIL ON FOREIGN RELATIONS INC — $2,000 · InternationalWORLD RESOURCES INSTITUTE — $1,000 · InternationalHELENA GROUP FOUNDATION — $10,000 · Community ImprovementThe Foundation for Community Betterment — $4,000 · Community ImprovementNew Directions Cello Association and Festival Inc — $5,000 · Arts & CultureON THE ISLE CORPORATION — $3,000 · Arts & CultureSTAN HYWET HALL AND GARDENS FOUNDATION — $2,000 · Arts & CultureTHE EDNA ST VINCENT MILLAY SOCIETY — $1,000 · Arts & CultureSTAN HYWET HALL & GARDENS INC — $1,000 · Arts & Culture
Other$720,000Environment$435,123Recreation & Sports$110,000Education$99,500International$28,000Community Improvement$14,000Arts & Culture$12,000

Each org by its size and your share of it — top-left is where you’re load-bearing

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ your share of their budgetTHE NATURE CONSERVANCY — $450,000 over 2y, 0.0% of budgetBUDO ACCELERATOR INC — $87,500 over 2y, 41% of budget'SCONSET TRUST INC — $76,000 over 3y, 2.3% of budgetSUSTAINABLE MARKETS FOUNDATION — $50,000 over 1y, 0.1% of budgetResources for the Future Inc — $40,000 over 5y, 0.1% of budgetWilliams College — $40,000 over 3y, 0.0% of budgetACUMEN FUND INC — $25,000 over 3y, 0.0% of budgetWESTERN RESERVE ACADEMY — $22,500 over 3y, 0.0% of budgetJUNIOR TENNIS CHAMPIONS CENTER INC — $22,500 over 2y, 0.1% of budgetWholeSchool Mindfulness Inc — $15,000 over 2y, 0.5% of budgetNew York University — $15,000 over 2y, 0.0% of budgetSANKATY HEAD FOUNDATION INC — $12,000 over 2y, 0.2% of budgetRARE — $10,000 over 2y, 0.0% of budgetHELENA GROUP FOUNDATION — $10,000 over 1y, 0.2% of budgetNANTUCKET CONSERVATION FOUNDATION INC — $7,500 over 2y, 0.0% of budgetINDIAN RIVER LAND TRUST INC — $7,500 over 2y, 0.2% of budgetENVIRONMENTAL LEARNING CENTER FOUNDATION INC — $7,000 over 2y, 2.6% of budgetGEORGETOWN MINISTRY CENTER — $6,000 over 2y, 0.3% of budgetMISS FRANS HELPING HANDS OF INDIAN — $6,000 over 2y, 11% of budgetWORLD WILDLIFE FUND INC — $6,000 over 2y, 0.0% of budgetNEXTGEN CLIMATE AMERICA INC — $5,000 over 1y, 0.1% of budgetWork on Climate — $5,000 over 1y, 0.8% of budgetCONSERVATION INTERNATIONAL FOUNDATION — $5,000 over 1y, 0.0% of budgetECOAMERICA — $5,000 over 1y, 0.2% of budgetENVIRONMENTAL DEFENSE FUND INCORPORATED — $5,000 over 1y, 0.0% of budgetAMERICAN RIVERS INC — $5,000 over 1y, 0.0% of budgetCommunity Foundation for Nantucket Inc — $5,000 over 1y, 0.1% of budgetNew Directions Cello Association and Festival Inc — $5,000 over 2y, 9.5% of budgetJOHN'S ISLAND COMMUNITY SERVICE LEAGUE INC — $5,000 over 2y, 0.1% of budgetMINDS MATTER NATIONAL INC — $5,000 over 1y, 0.4% of budgetDUKE UNIVERSITY — $5,000 over 1y, 0.0% of budgetThe Foundation for Community Betterment — $4,000 over 2y, 1.0% of budgetN STREET VILLAGE INC — $4,000 over 2y, 0.0% of budgetTHE WILSON HOUSE OF EAST DORSET — $4,000 over 2y, 0.2% of budgetWESTSIDE CLUB OF GEORGETOWN INC — $3,000 over 1y, 3.0% of budgetON THE ISLE CORPORATION — $3,000 over 2y, 2.1% of budgetSTAN HYWET HALL AND GARDENS FOUNDATION — $2,000 over 1y, 0.1% of budgetBILLION OYSTER PROJECT INC — $2,000 over 1y, 0.0% of budgetPEN FAULKNER FOUNDATION — $2,000 over 2y, 0.1% of budgetHOLLIDAY PARK FOUNDATION INC — $2,000 over 1y, 0.2% of budgetCOUNCIL ON FOREIGN RELATIONS INC — $2,000 over 2y, 0.0% of budgetGENERAL SERVICE BOARD OF ALCOHOLICS ANONYMOUS INC — $2,000 over 2y, 0.0% of budgetVASSAR COLLEGE — $1,000 over 1y, 0.0% of budgetTHE EDNA ST VINCENT MILLAY SOCIETY — $1,000 over 1y, 0.1% of budgetWORLD RESOURCES INSTITUTE — $1,000 over 1y, 0.0% of budget
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.

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.

ImpactassetsincThe Goldman Sachs Cha…Gs Donor Advised Phil…Greater Washington Co…National Philanthropi…California Community …Jewish Communal FundMorgan Stanley Global…Silicon Valley Commun…Vanguard Charitable E…American Endowment Fo…The Bank of America C…
ImpactassetsincMD13.3× affinity6 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Impactassetsinc · The Goldman Sachs Charitable Gift Fund · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · Greater Washington Community Foundation · National Philanthropic Trust · California Community Foundation · Jewish Communal Fund · Morgan Stanley Global Impact Funding Trust Inc · Silicon Valley Community Foundation · Vanguard Charitable Endowment Program · American Endowment Foundation · The Bank of America Charitable 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 Mark & Amy Tercek 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.

2024
’20’21’22’23’24’25
no gov · 20%3%13%28%50%your share of their income ↑0%23%45%68%90%share of the org’s income from government →median 0%
  • Williams College — 0% of income from government
no gov moneyreceives it· size = income
2get no government money at all
2report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–90%
typical government reliance, FY20–25

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.

On method. Every financial figure here is read directly from IRS e-file XML — your own 990/990-PF and the multi-year returns of the 58 grantees we resolved across every year we hold, several hundred filings in all (a different count from the grant rows on the cover, which are one fiscal year)— each linked to its source. Grantee achievements and outcomes are each organization’s own program-service reporting (Form 990, Part III); we read these as association with sustained funding — the foundation is one of several forces — suppress low-confidence name matches rather than guess, and say so where a figure rests on a single grant or filing. Not everything on this page is a filed figure, and the difference matters. Filed is what you reported on your 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. How we build these →

Generated from your IRS Form 990-PF e-file return for fiscal year 2025, released 2025. Filings run roughly 12–24 months behind; figures are dated accordingly.

Source object · view filing

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 camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home
State money flows
the interactive map of money crossing state lines