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Nevada · Private foundation

Willliam H & Mattie Wattis Harris Foundation

Its FY2025 filing reports that it accepted unsolicited grant applications.

$740k
Granted FY2025(still arriving)
108
Grants FY2025
86
Organizations funded FY2024
76%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$5,000
Largest grant, FY2025
$51,000
Organizations funded a year
1 to 86
FY2020 to FY2024
States reached, FY2025
21
Total assets, FY2025
$3.0M
Applications
Takes unsolicited applications
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 76% of the organizations Willliam H & Mattie Wattis Harris Foundation funded were first-time grantees, receiving 75% of its grant dollars.

New vs renewed · share of each year

In FY2024, 25% of grant dollars renewed an existing relationship; $318k went to new ones.

50%100%’23’24
RenewedFirst-time

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

’23’24
AnimalsEnvironmentArts & CultureHuman ServicesEducationFood & NutritionOther
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 arriving107$738k51%
FY202486$426k76%
FY20231$7100%
FY202059$207kn/a
92% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2024.

Animals$155kEnvironment$91kArts & Culture$75kHuman Services$61kHealth$53kEducation$44kYouth Development$35kRecreation & Sports$28kOther$0

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

WA
ID
MT
MN
NY
OR
NV
NJ
CT
CA
UT
CO
KY
VA
MD
AZ
NM
DC
HI
AL
GA
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
Blue Rose Ranch Inc$36,000210%
Save the Manatee Club Inc$31,85020%
St Johns College in Santa Fe$27,0002n/a
Growing Gardens of Boulder County$26,00031%
Punahou School$25,91720%
Planned Parenthood Mar Monte Inc$22,00010%
Habitat for Humanity in Atlanta Inc$20,00020%
Rocky Mountain Planned Parenthood Inc$18,50030%
Sosa - Safe From Online Sex Abuse Inc$18,50022%
Atlanta Fulton County Zoo Inc$18,00030%
Show all 134 grantees
All grantees of Willliam H & Mattie Wattis Harris Foundation by total granted
GranteeTotal grantedYearsShare of their budget
Blue Rose Ranch Inc$36,000210%
Save the Manatee Club Inc$31,85020%
St Johns College in Santa Fe$27,0002n/a
Growing Gardens of Boulder County$26,00031%
Punahou School$25,91720%
Planned Parenthood Mar Monte Inc$22,00010%
Habitat for Humanity in Atlanta Inc$20,00020%
Rocky Mountain Planned Parenthood Inc$18,50030%
Sosa - Safe From Online Sex Abuse Inc$18,50022%
Atlanta Fulton County Zoo Inc$18,00030%
Zoological Society of San Diego$16,23330%
Jazz at Aspen-Snowmass$16,00020%
Jacksonville Zoological Society Inc$16,00030%
Donkey Dreams Sanctuary Inc$15,00026%
Rocky Mountain Raptor Program$15,00021%
W O L F$14,0001n/a
Weber State University$13,5003n/a
The Chandler School$13,00030%
Aspen Santa Fe Ballet$12,00030%
National Wildlife Federation$12,00020%
International Snow Leopard Trust$11,83330%
Pablove Foundation Inc$11,00012%
Ecoflight$10,50031%
Project Griph$10,00019%
New Mexico School for the Arts - Arts Institute$10,00010%
National Disaster Search Dog Foundation$10,00020%
Earth Guardians$10,0001n/a
Guide Dogs for the Blind Inc$10,00030%
Camp More$10,0001n/a
Colorado Open Lands$10,00010%
Red Hen Press Inc$10,00011%
Arizona Friends of Foster Children Foundation$10,00010%
350 Colorado$10,00011%
Desert Tortoise Preserve Committee Inc$10,00020%
Wilderness Workshop$10,00030%
Friends of Belize Bird Rescue Inc$9,50021%
Los Padres Forestwatch Inc$9,00021%
National Jewish Health$9,00020%
The Billfish Foundation Inc$9,00020%
The Marine Mammal Center$8,50030%
American Wild Horse Preservation Campaign$8,3341n/a
Independence Pass Foundation$8,00012%
Eye Care for Kids$8,0002n/a
Greater Gallatin United Way Inc$7,50010%
Oregon Livestock Council$7,5001n/a
The Science and Conservation Center Inc$7,5001n/a
Holy Cross Education Foundation$7,50031%
Naturebridge$7,50010%
The Childrens Lifesaving Foundation$7,50011%
Freedom Equine Connection$7,5001n/a
Parker Learning Gardens$7,00017%
The Kiva Center$7,00012%
Aspen Historical Society$7,00020%
SheJumps$7,00011%
Youthzone Inc$6,50010%
Colorado Ballet$6,50020%
Northern Nevada EMS Consortium$6,5001n/a
Canyonlands Field Institute Inc$6,00021%
Hamilton Players Inc$6,00012%
Girls on the Run of the Rockies$6,00010%
Electric Moon Foundation$6,0001n/a
Actors Company and Theater School$6,00014%
Mountain Roots Food Project$6,00020%
Longhopes Donkey Shelter Inc$6,00010%
Tri County Wildlife Care Inc$5,79611%
The Asher House$5,50020%
Tree Utah$5,20011%
The Street Dog Coalition$5,00012%
Heartwood Haven$5,00011%
Aspen Center for Environmental Studies$5,00010%
Animal Wonders Inc$5,00012%
International Game Fish Association Inc$5,00030%
Colorado Horse Rescue$5,00010%
Love Wild Horses Foundation$5,0001n/a
Takshanuk Watershed Council$5,00012%
Pacific Wildlife Care$5,0001n/a
Ocean First Institute$5,00013%
Bare Bait Dance$5,00012%
Edgewood Children's Ranch Inc$5,00010%
Atlanta Community Food Bank Inc$5,00010%
Growe Foundation$5,00013%
Snake River Waterkeeper Inc$5,00011%
Youth Rising$5,0001n/a
The Animal Foundation$5,00010%
Wolf Haven International$5,0001n/a
The Big Bad Project$5,000110%
Paws and Stripes Inc$5,00010%
Pfleger Institute of Environmental Research$5,00011%
The Place of Horses$4,28713%
Bridgeway House$4,00010%
Rainforest Rising$4,00012%
Womens Voices Now Inc$4,00011%
Yaak Valley Forest Council$4,00011%
Tucson Arizona Boys Chorus$4,00011%
Women of the World$4,00010%
Ramsey Research Foundation Inc$4,00011%
The Atlanta Botanical Garden Inc$4,00020%
All Vegas Horses$4,00029%
Center for Biological Diversity Inc$4,00010%
Bilingual Education for Central America$4,00022%
Camp Not-A-Wheeze$3,50013%
On Pitch Performing Arts Inc$3,0001n/a
Durango Playfest$3,00012%
Seas of Trees$3,00014%
Danceaspen$3,00020%
Museum of New Mexico Foundation$3,00010%
Burn Institute$3,00010%
Path Foundation Inc$3,00010%
Equine Land Conservation Resource$3,00011%
The Santa Fe Opera$3,00010%
Ziegfeld Theater Arts$3,00010%
Three Square$2,50020%
The Food Depot$2,50010%
Neighborhood Housing Services of Southern Nevada Inc$2,5001n/a
Pasadena Humane$2,5001n/a
Skylight Theatre Company$2,00010%
Project Helping$2,0001n/a
Saddlebred Rescue Inc$2,0001n/a
Western Rivers Conservancy$2,00010%
Kentucky Humane Society - Animal Rescue$2,00010%
Denver Botanic Gardens Inc$2,00010%
Mid-City Concerns Inc$2,0001n/a
Hypertrophic Cardiomyopathy Association$1,50010%
Cheetah Conservation Fund$1,00010%
The Heart and Soul Animal Sanctuary$1,00010%
Project Marilyn Inc$1,00010%
The Fistula Foundation$1,00010%
Nevada Public Radio$1,00010%
Aspen Hope Center$1,00010%
Pride Tree$1,00011%
Southern Poverty Law Center Inc$50010%
St Judes Ranch for Children Inc$5001n/a
Save the Redwoods League$40010%
Friends of Griffith Park$40010%

What it could do for these grantees

Plus 46 recipients with no EIN on record ($382k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget Willliam H & Mattie Wattis Harris Foundation supplied at peak.

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetBlue Rose Ranch Inc: $36,000 over 2y, 9.9% of budgetSave the Manatee Club Inc: $31,850 over 2y, 0.4% of budgetGrowing Gardens of Boulder County: $26,000 over 3y, 1.0% of budgetPunahou School: $25,917 over 2y, 0.0% of budgetPlanned Parenthood Mar Monte Inc: $22,000 over 1y, 0.0% of budgetHabitat for Humanity in Atlanta Inc: $20,000 over 2y, 0.0% of budgetRocky Mountain Planned Parenthood Inc: $18,500 over 3y, 0.0% of budgetSosa - Safe From Online Sex Abuse Inc: $18,500 over 2y, 2.0% of budgetAtlanta Fulton County Zoo Inc: $18,000 over 3y, 0.0% of budgetZoological Society of San Diego: $16,233 over 3y, 0.0% of budgetJazz at Aspen-Snowmass: $16,000 over 2y, 0.0% of budgetJacksonville Zoological Society Inc: $16,000 over 3y, 0.0% of budgetDonkey Dreams Sanctuary Inc: $15,000 over 2y, 5.5% of budgetRocky Mountain Raptor Program: $15,000 over 2y, 0.6% of budgetThe Chandler School: $13,000 over 3y, 0.0% of budgetAspen Santa Fe Ballet: $12,000 over 3y, 0.1% of budgetNational Wildlife Federation: $12,000 over 2y, 0.0% of budgetInternational Snow Leopard Trust: $11,833 over 3y, 0.1% of budgetPablove Foundation Inc: $11,000 over 1y, 1.9% of budgetEcoflight: $10,500 over 3y, 0.5% of budgetProject Griph: $10,000 over 1y, 8.5% of budgetNew Mexico School for the Arts - Arts Institute: $10,000 over 1y, 0.4% of budgetNational Disaster Search Dog Foundation: $10,000 over 2y, 0.1% of budgetGuide Dogs for the Blind Inc: $10,000 over 3y, 0.0% of budgetColorado Open Lands: $10,000 over 1y, 0.0% of budgetRed Hen Press Inc: $10,000 over 1y, 0.8% of budgetArizona Friends of Foster Children Foundation: $10,000 over 1y, 0.2% of budget350 Colorado: $10,000 over 1y, 0.9% of budgetDesert Tortoise Preserve Committee Inc: $10,000 over 2y, 0.4% of budgetWilderness Workshop: $10,000 over 3y, 0.2% of budgetFriends of Belize Bird Rescue Inc: $9,500 over 2y, 1.4% of budgetLos Padres Forestwatch Inc: $9,000 over 2y, 0.5% of budgetNational Jewish Health: $9,000 over 2y, 0.0% of budgetThe Billfish Foundation Inc: $9,000 over 2y, 0.4% of budgetThe Marine Mammal Center: $8,500 over 3y, 0.0% of budgetIndependence Pass Foundation: $8,000 over 1y, 1.6% of budgetGreater Gallatin United Way Inc: $7,500 over 1y, 0.3% of budgetHoly Cross Education Foundation: $7,500 over 3y, 0.6% of budgetNaturebridge: $7,500 over 1y, 0.0% of budgetThe Childrens Lifesaving Foundation: $7,500 over 1y, 1.3% of budgetParker Learning Gardens: $7,000 over 1y, 6.7% of budgetThe Kiva Center: $7,000 over 1y, 2.0% of budgetAspen Historical Society: $7,000 over 2y, 0.2% of budgetSheJumps: $7,000 over 1y, 0.6% of budgetYouthzone Inc: $6,500 over 1y, 0.4% of budgetColorado Ballet: $6,500 over 2y, 0.0% of budgetCanyonlands Field Institute Inc: $6,000 over 2y, 0.7% of budgetHamilton Players Inc: $6,000 over 1y, 1.9% 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 111.

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.

Colorado Gives FoundationCO24.7× affinity14 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Colorado Gives Foundation · Patagoniaorg · El Pomar Foundation · Aspen Community Foundation · Maki Foundation · Clif Family Foundation · Ruth a Carver Foundation · National Fish and Wildlife Foundation · Aspen Business Center Foundation · Ruth Brown Foundation · Arches Foundation · John & Jacolyn Bucksbaum Family Found

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 Willliam H & Mattie Wattis Harris Foundation with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to Willliam H & Mattie Wattis Harris Foundation?

Find your warmest path to Willliam H & Mattie Wattis Harris Foundation 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 Willliam H & Mattie Wattis Harris Foundation

How much does Willliam H & Mattie Wattis Harris Foundation give?
Willliam H & Mattie Wattis Harris Foundation reported 108 grants totaling $740,000 in its FY2025 IRS filing. It funded between 1 and 86 organizations a year over FY2020 to FY2024.
What does Willliam H & Mattie Wattis Harris Foundation fund?
By grant dollars over FY2020 to FY2025, its largest causes are Animals (7%), Environment (4%), Arts & Culture (3%).
Who are Willliam H & Mattie Wattis Harris Foundation's largest grantees?
By total granted over FY2020 to FY2025: Blue Rose Ranch Inc ($36k), Save the Manatee Club Inc ($32k), St Johns College in Santa Fe ($27k).
Does Willliam H & Mattie Wattis Harris Foundation fund new organizations?
In FY2024, 76% of the organizations it funded were first-time grantees.
Does Willliam H & Mattie Wattis Harris Foundation accept unsolicited applications?
Its most recent filing reports that it accepts unsolicited grant applications.
Which funders back the same organizations as Willliam H & Mattie Wattis Harris Foundation?
Its strongest co-funders, measured against what their size predicts, include Colorado Gives Foundation, Patagoniaorg, El Pomar Foundation.
Where is Willliam H & Mattie Wattis Harris Foundation based?
Willliam H & Mattie Wattis Harris Foundation is based in NV.

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 181 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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