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Massachusetts · Private foundation

Mac Five Foundation Inc

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.

$18M
Granted FY2025(still arriving)
4
Grants FY2025
28
Organizations funded FY2024
7%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$8,100,000
Largest grant, FY2025
$9,000,000
Organizations funded a year
26 to 37
FY2020 to FY2024
States reached, FY2025
1
Total assets, FY2025
$103M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 7% of the organizations Mac Five Foundation Inc funded were first-time grantees, receiving 1% of its grant dollars.

New vs renewed · share of each year

In FY2024, 99% of grant dollars renewed an existing relationship; $185k went to new ones.

50%100%’21’22’23’24
RenewedFirst-time

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

’21’22’23’24
EducationEnvironmentCommunity ImprovementHuman ServicesArts & CultureScience & TechOther
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.
The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2025still arriving4$18M75%
FY202428$15M7%
FY202337$8.3M41%
FY202236$7.9M56%
FY202126$7.3M38%
FY202030$6.5Mn/a
99% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2025.

Education$30MPhilanthropy$12MFood & Nutrition$8.1MScience & Tech$6.6MEnvironment$2.7MHealth$2.0MAnimals$550kRecreation & Sports$270kOther$0

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

NH
MN
IL
MI
NY
MA
OH
NJ
CA
CO
NE
MO
KY
WV
VA
NM
KS
TX
FL

Top grantees

Largest recipients by total granted, FY2020 to FY2025, and the share of each one’s budget the grants supplied at peak.

GranteeTotal grantedYearsShare of their budget
Davis & Elkins College$11,750,000313%
The Jsm Charitable Trust$9,000,000150%
Washington University$8,965,00060%
Donald Danforth Plant Science Center$5,600,00045%
Teach St Louis$2,867,500527%
The Trustees of Princeton University$1,642,24810%
Trustees of Tufts College$750,00010%
The Saint Louis Zoo Association$550,00031%
The Opportunity Trust D/B/A Zest Education$530,50042%
Biostl$460,00032%
Show all 60 grantees
All grantees of Mac Five Foundation Inc by total granted
GranteeTotal grantedYearsShare of their budget
Davis & Elkins College$11,750,000313%
The Jsm Charitable Trust$9,000,000150%
Washington University$8,965,00060%
Donald Danforth Plant Science Center$5,600,00045%
Teach St Louis$2,867,500527%
The Trustees of Princeton University$1,642,24810%
Trustees of Tufts College$750,00010%
The Saint Louis Zoo Association$550,00031%
The Opportunity Trust D/B/A Zest Education$530,50042%
Biostl$460,00032%
St Louis County Library Foundation$450,000211%
The Little Bit Foundation$430,00044%
Gateway Global American Youth & Business Alliance Inc$415,000476%
Glenview Mercury Family Foundation$347,595120%
City Academy Inc$300,00014%
Teach for America Inc$300,00020%
Starpatch Foundation$275,065119%
Forest Park Forever Inc$270,00021%
Ohio Wesleyan University$200,00020%
Great Rivers Environmental Law Center$200,000214%
John Burroughs School$135,00030%
Mary Institute and St Louis Country Day School$135,00010%
Environmental Law and Policy Center of the Midwest$120,00021%
Thinker Analytix Inc$100,00037%
White Mountain Science Inc$100,000211%
Girl Scouts of Eastern Missouri Inc$93,00030%
Scripps College$80,00030%
The University of Texas Foundation Inc$75,00030%
Karkhana Global$75,000127%
Aim High St Louis$72,00034%
Environment America Research and Policy Center Inc$70,00021%
South Sudanese Enrichment for Families Inc$50,000110%
The Magic House$30,00030%
The Recycling Partnership Inc$30,00030%
Turn the Page Stl$30,00024%
Great Lakes Aquatic Habitat Network and Fund Inc$30,00031%
Keyah Advanced Rural Manufacturing Alliance$25,0001n/a
The Covering House$20,00011%
Beyond Housing Inc$20,00010%
The American Youth Foundation$20,00010%
Neighborhood Solidarity Fund$20,0001n/a
Trustees of Boston College$20,00020%
Characterplus$20,00021%
HomeWorks Trenton$15,00013%
Forward Through Ferguson$11,00021%
350org$10,00010%
Cortex$10,00010%
Community School Association$10,00010%
Home Works - Thvp$10,00011%
We Charity William C Moran & Assoc PC$10,00010%
Ranken Technical College$10,00010%
St Louis Regional Public Media Inc$10,00010%
Codman Community Farms Inc$10,00011%
Community Funds Inc$10,0001n/a
Uniting Partners for Women and Children$6,00021%
Somerville Homeless Coalition Inc$2,00020%
Boston Symphony Orchestra Inc$1,00010%
Medical Debt Resolution Inc$1,00010%
Science Club for Girls Inc$1,00010%
Zumix Inc$1,00010%

What it could do for these grantees

Plus 20 recipients with no EIN on record ($16M), not named here.

Where it is load-bearing

Mac Five Foundation Inc supplied at least a quarter of the budget for 4 of its grantees at some point. The chart plots its 57 largest grantees; load-bearing ones sit top left.

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetDavis & Elkins College: $11,750,000 over 3y, 13% of budgetThe Jsm Charitable Trust: $9,000,000 over 1y, 50% of budgetWashington University: $8,965,000 over 6y, 0.1% of budgetDonald Danforth Plant Science Center: $5,600,000 over 4y, 4.7% of budgetTeach St Louis: $2,867,500 over 5y, 27% of budgetThe Trustees of Princeton University: $1,642,248 over 1y, 0.1% of budgetTrustees of Tufts College: $750,000 over 1y, 0.1% of budgetThe Saint Louis Zoo Association: $550,000 over 3y, 0.5% of budgetThe Opportunity Trust D/B/A Zest Education: $530,500 over 4y, 1.8% of budgetBiostl: $460,000 over 3y, 2.0% of budgetSt Louis County Library Foundation: $450,000 over 2y, 11% of budgetThe Little Bit Foundation: $430,000 over 4y, 4.0% of budgetGateway Global American Youth & Business Alliance Inc: $415,000 over 4y, 76% of budgetGlenview Mercury Family Foundation: $347,595 over 1y, 20% of budgetCity Academy Inc: $300,000 over 1y, 4.4% of budgetTeach for America Inc: $300,000 over 2y, 0.1% of budgetStarpatch Foundation: $275,065 over 1y, 19% of budgetForest Park Forever Inc: $270,000 over 2y, 0.6% of budgetOhio Wesleyan University: $200,000 over 2y, 0.1% of budgetGreat Rivers Environmental Law Center: $200,000 over 2y, 14% of budgetJohn Burroughs School: $135,000 over 3y, 0.2% of budgetMary Institute and St Louis Country Day School: $135,000 over 1y, 0.3% of budgetEnvironmental Law and Policy Center of the Midwest: $120,000 over 2y, 1.0% of budgetThinker Analytix Inc: $100,000 over 3y, 7.5% of budgetWhite Mountain Science Inc: $100,000 over 2y, 11% of budgetGirl Scouts of Eastern Missouri Inc: $93,000 over 3y, 0.2% of budgetScripps College: $80,000 over 3y, 0.0% of budgetThe University of Texas Foundation Inc: $75,000 over 3y, 0.1% of budgetKarkhana Global: $75,000 over 1y, 27% of budgetAim High St Louis: $72,000 over 3y, 4.4% of budgetEnvironment America Research and Policy Center Inc: $70,000 over 2y, 1.1% of budgetSouth Sudanese Enrichment for Families Inc: $50,000 over 1y, 10% of budgetThe Magic House: $30,000 over 3y, 0.2% of budgetThe Recycling Partnership Inc: $30,000 over 3y, 0.0% of budgetTurn the Page Stl: $30,000 over 2y, 4.0% of budgetGreat Lakes Aquatic Habitat Network and Fund Inc: $30,000 over 3y, 0.8% of budgetThe Covering House: $20,000 over 1y, 1.1% of budgetBeyond Housing Inc: $20,000 over 1y, 0.2% of budgetThe American Youth Foundation: $20,000 over 1y, 0.3% of budgetTrustees of Boston College: $20,000 over 2y, 0.0% of budgetCharacterplus: $20,000 over 2y, 0.8% of budgetHomeWorks Trenton: $15,000 over 1y, 2.6% of budgetForward Through Ferguson: $11,000 over 2y, 1.1% of budget350org: $10,000 over 1y, 0.1% of budgetCortex: $10,000 over 1y, 0.1% of budgetCommunity School Association: $10,000 over 1y, 0.1% of budgetHome Works - Thvp: $10,000 over 1y, 1.1% of budgetWe Charity William C Moran & Assoc PC: $10,000 over 1y, 0.0% 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 57.

Nonprofits that may fit its grantmaking

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.

St Louis Community Foundation IncMO46.4× affinity22 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: St Louis Community Foundation Inc · United Way of Greater St Louis Inc · Commerce Bancshares Foundation · Moneta Group Charitable Foundation · St Louis Community Foundation · Berges Family Foundation · Trio Foundation of St Louis · Centene Foundation · World Wide Technology Foundation · Youthbridge Community Foundation · Employees Community Fund of the Boeing Company · The Rogers Family 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.

Compare Mac Five Foundation Inc with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to Mac Five Foundation Inc?

Find your warmest path to Mac Five Foundation Inc through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.

Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.

About Mac Five Foundation Inc

How much does Mac Five Foundation Inc give?
Mac Five Foundation Inc reported 4 grants totaling $17,722,660 in its FY2025 IRS filing. It funded between 26 and 37 organizations a year over FY2020 to FY2024.
What does Mac Five Foundation Inc fund?
By grant dollars over FY2020 to FY2025, its largest causes are Education (48%), Philanthropy (19%), Food & Nutrition (13%).
Who are Mac Five Foundation Inc's largest grantees?
By total granted over FY2020 to FY2025: Davis & Elkins College ($12M), The Jsm Charitable Trust ($9.0M), Washington University ($9.0M).
Does Mac Five Foundation Inc fund new organizations?
In FY2024, 7% of the organizations it funded were first-time grantees.
Does Mac Five Foundation Inc 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 Mac Five Foundation Inc?
Its strongest co-funders, measured against what their size predicts, include St Louis Community Foundation Inc, United Way of Greater St Louis Inc, Commerce Bancshares Foundation.
Where is Mac Five Foundation Inc based?
Mac Five Foundation Inc is based in MA.

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 84 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

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