Funding search · EIN 231503488 · Philadelphia, PA
The William Penn Foundation
A private foundation (files IRS Form 990-PF). Most private foundations do not take unsolicited applications; the route in is usually a program officer.
- 4,421
- grants reported
- $589.0M
- total given
- 2022–2024
- filing years
- $40,000
- median grant
Based on grants this organization reported to the IRS for tax years 2022–2024. This is what they filed, not a complete record of their giving, and recent years may be incomplete because filings lag.
What they fund
Funder website ↗Full IRS filings ↗How this is builtReport an error
Funding pattern
What this funder pays for, at what size, and how to position adjacent work. Read from their filings, with every number checked against the record.
Where the money goes
- Delaware River Watershed protection, restoration, and stormwater advocacy
- Philadelphia parks, trails, and public space capital construction
- Early childhood education quality, curriculum, and state advocacy
- K-3 literacy and out-of-school learning in Philadelphia
- Arts and culture capital campaigns for Philadelphia institutions
- Climate justice, green jobs, and federal climate funding coordination
Typical grant
Median grant is $40,000 and half of all grants fall between $2,500 and $140,625, so most of the volume is small and mid-size project support. The seven- and eight-figure checks go almost entirely to capital construction (Penn's Landing Park, FDR Park, Kimmel Center, Philadelphia Zoo) and to pooled funds run through intermediaries like National Philanthropic Trust and Philadelphia City Fund. Multi-year and repeat giving is common, with organizations like Fairmount Park Conservancy, Philadelphia City Fund, Open Space Institute, and Public Health Management Corporation appearing more than once.
Their words
Phrases from their own grant descriptions, worth speaking back to them.
- “DRWI”
- “CIRCUIT TRAILS LEADERSHIP”
- “CAPITAL CAMPAIGN 2024”
- “EARLY CHILDHOOD ADVOCACY CAMPAIGN”
- “CLIMATE JUSTICE”
- “GREEN STORMWATER INFRASTRUCTURE”
Positioning adjacent work
- Tie watershed or stormwater work explicitly to DRWI framing and to existing coalition partners like Stroud, OSI, or NWF.
- Ask in the $300,000 to $500,000 range for a multi-year project; that is their comfortable band below capital.
- Pair technical analysis with community organizing and advocacy; they fund both together, rarely research alone.
- For education-adjacent work, connect to K-3 literacy or early childhood teacher professional development, not general school reform.
Worth knowing: This is a Philadelphia funder first and a Delaware River basin funder second: 3,108 of 4,421 grants went to Pennsylvania recipients, and out-of-state grants almost always serve the watershed or Philadelphia. A meaningful share of the largest dollars flows through intermediaries and pooled funds (National Philanthropic Trust, Philadelphia City Fund, Culture Trust, Reinvestment Fund), which means getting into an existing collaborative can matter more than a direct request.
87 grants matching “trail” · $19.7M
- $716,150
Pennsylvania Environmental Council · Philadelphia, PA · 2024
Circuit trails leadership
- $398,318
Camden Community Partnership · Camden, NJ · 2024
Develop and activate circuit trails
- $300,000
Bicycle Coalition of Greater Philadelphia · Philadelphia, PA · 2024
Circuit trails leadership
- $275,000
Rails To Trails Conservancy · Washington, DC · 2024
Circuit trails marketing and communications
- $250,000
Delaware Valley Regional Planning Commission · Philadelphia, PA · 2024
Regional trails program
- $250,000
Clean Air Council · Philadelphia, PA · 2024
Trail advocacy
- $200,000
Rails To Trails Conservancy · Washington, DC · 2024
Advance circuit trails development
- $185,000
Trust for Public Land · Philadelphia, PA · 2024
Camden parks and trails
- $167,500
Tri-State Transportation Campaign · New York, NY · 2024
Programs and securing new funding for circuit trails in nj
- $166,000
New Jersey Conservation Foundation · Far Hills, NJ · 2024
Gateway park and circuit trails
- $162,500
Appalachian Mountain Club · Boston, MA · 2024
Advance highlands trail in pa and watershed protection
- $162,500
East Coast Greenway Alliance · Durham, NC · 2024
Promoting east coast greenway trail development
- $150,000
Brandywine Conservancy and Museum of Art · Chadds Ford, PA · 2024
Advance river recreation and circuit trails in the brandywine river valley
- $137,500
Delaware Nature Society · Hockessin, DE · 2024
Trail ambassadors program at dupont environmental education center
- $125,000
Delaware and Lehigh National Heritage Corridor · Easton, PA · 2024
Activate trail users
- $96,500
Natural Lands · Media, PA · 2024
Urban circuit trails
- $72,000
New Jersey Tree Foundation · Jackson, NJ · 2024
Trees for trails to plant and maintain trees on trails
- $1.9M
Delaware Valley Regional Planning Commission · Philadelphia, PA · 2023
Regional trails program
- $806,696
Pennsylvania Environmental Council · Philadelphia, PA · 2023
Advance circuit trails
- $422,302
Camden Community Partnership · Camden, NJ · 2023
Develop and activate circuit trails
- $299,999
Bicycle Coalition of Greater Philadelphia · Philadelphia, PA · 2023
Circuit trails leadership
- $274,820
Rails To Trails Conservancy · Washington, DC · 2023
Circuit trails marketing and communications
- $250,564
Clean Air Council · Philadelphia, PA · 2023
Trail advocacy
- $243,472
Kaboom · Bethesda, MD · 2023
Playful learning story trails
- $185,000
Trust for Public Land · Philadelphia, PA · 2023
Camden parks and trails
- $185,000
Tri-State Transportation Campaign · New York, NY · 2023
Programs and securing new funding for circuit trails in nj
- $166,202
Appalachian Mountain Club · Boston, MA · 2023
Advance highlands trail in pa and watershed protection
- $166,068
Rails To Trails Conservancy · Washington, DC · 2023
Advance circuit trails development
- $166,000
New Jersey Conservation Foundation · Far Hills, NJ · 2023
Gateway park and circuit trails
- $160,000
Brandywine Conservancy and Museum of Art · Chadds Ford, PA · 2023
Advance river recreation and the circuit trails in the brandywine river valley
- $130,000
Delaware Nature Society · Hockessin, DE · 2023
Trail ambassadors program at dupont environmental education center
- $122,860
Delaware and Lehigh National Heritage Corridor · Easton, PA · 2023
Activate trail users
- $110,000
New Jersey Future · Trenton, NJ · 2023
Circuit trails advocacy in nj
- $100,000
Delaware River Waterfront Corporation · Philadelphia, PA · 2023
Graffiti pier and delaware river trail planning
- $80,000
Delaware Valley Regional Planning Commission · Philadelphia, PA · 2023
Regional trails program in environmental justice communities
- $72,000
New Jersey Tree Foundation · Jackson, NJ · 2023
Trees for trails
- $62,500
East Coast Greenway Alliance · Durham, NC · 2023
Promoting east coast greenway trail development
- $50,000
Bicycle Coalition of Greater Philadelphia · Philadelphia, PA · 2023
Bcgp + circuit trails leadership transition
- $45,000
Delaware Greenways · Wilmington, DE · 2023
Advance trail development in northern de
- $825,604
Pennsylvania Environmental Council · Philadelphia, PA · 2022
Advance circuit trails
- $825,604
Pennsylvania Environmental Council · Philadelphia, PA · 2022
Advance circuit trails
- $372,500
Cooper'S Ferry Partnership · Camden, NJ · 2022
Activation of circuit trails along delaware and cooper rivers
- $372,500
Cooper'S Ferry Partnership · Camden, NJ · 2022
Activation of circuit trails along delaware and cooper rivers
- $370,000
Trust for Public Land · Philadelphia, PA · 2022
Development of waterfront parks, green stormwater infrastructure and trails in camden.
- $370,000
Trust for Public Land · Philadelphia, PA · 2022
Development of waterfront parks, green stormwater infrastructure and trails in camden.
- $359,890
Kaboom · Bethesda, MD · 2022
Playful learning story trails
- $359,890
Kaboom · Bethesda, MD · 2022
Playful learning story trails
- $340,000
Delaware River Waterfront Corporation · Philadelphia, PA · 2022
Graffiti pier and delaware river trail planning
- $340,000
Delaware River Waterfront Corporation · Philadelphia, PA · 2022
Graffiti pier and delaware river trail planning
- $300,001
Bicycle Coalition of Greater Philadelphia · Philadelphia, PA · 2022
Circuit trails leadership
- $300,001
Bicycle Coalition of Greater Philadelphia · Philadelphia, PA · 2022
Circuit trails leadership
- $275,180
Rails To Trails Conservancy · Washington, DC · 2022
Circuit trails marketing and communications
- $275,180
Rails To Trails Conservancy · Washington, DC · 2022
Circuit trails marketing and communications
- $264,500
Pennsylvania Environmental Council · Philadelphia, PA · 2022
Advance circuit trails
- $264,500
Pennsylvania Environmental Council · Philadelphia, PA · 2022
Advance circuit trails
- $252,906
Clean Air Council · Philadelphia, PA · 2022
Trail advocacy
- $252,906
Clean Air Council · Philadelphia, PA · 2022
Trail advocacy
- $166,000
New Jersey Conservation Foundation · Far Hills, NJ · 2022
Gateway park and circuit trails
- $166,000
New Jersey Conservation Foundation · Far Hills, NJ · 2022
Gateway park and circuit trails
- $163,932
Rails To Trails Conservancy · Washington, DC · 2022
Advance circuit trails development
- $163,932
Rails To Trails Conservancy · Washington, DC · 2022
Advance circuit trails development
- $158,798
Appalachian Mountain Club · Boston, MA · 2022
Advance highlands trail in pa and watershed protection
- $158,798
Appalachian Mountain Club · Boston, MA · 2022
Advance highlands trail in pa and watershed protection
- $150,000
Tri-State Transportation Campaign · New York, NY · 2022
Programs and securing new funding for circuit trails in nj
- $150,000
Tri-State Transportation Campaign · New York, NY · 2022
Programs and securing new funding for circuit trails in nj
- $140,000
Brandywine Conservancy and Museum of Art · Chadds Ford, PA · 2022
Advance river recreation and the circuit trails in the brandywine river valley
- $140,000
Brandywine Conservancy and Museum of Art · Chadds Ford, PA · 2022
Advance river recreation and the circuit trails in the brandywine river valley
- $130,000
Delaware Nature Society · Hockessin, DE · 2022
Trail ambassadors program at dupont environmental education center
- $130,000
Delaware Nature Society · Hockessin, DE · 2022
Trail ambassadors program at dupont environmental education center
- $127,140
Delaware and Lehigh National Heritage Corridor · Easton, PA · 2022
Activate trail users
- $127,140
Delaware and Lehigh National Heritage Corridor · Easton, PA · 2022
Activate trail users
- $96,000
Natural Lands · Media, PA · 2022
Urban circuit trails
- $96,000
Natural Lands · Media, PA · 2022
Urban circuit trails
- $80,000
Delaware Valley Regional Planning Commission · Philadelphia, PA · 2022
Regional trails program in environmental justice communities
- $80,000
Delaware Valley Regional Planning Commission · Philadelphia, PA · 2022
Regional trails program in environmental justice communities
- $79,717
Tookany-Tacony-Frankford Watershed Partnership · Philadelphia, PA · 2022
River alive learning trail
- $79,717
Tookany-Tacony-Frankford Watershed Partnership · Philadelphia, PA · 2022
River alive learning trail
- $72,000
New Jersey Tree Foundation · Jackson, NJ · 2022
Trees for trails
- $72,000
New Jersey Tree Foundation · Jackson, NJ · 2022
Trees for trails
- $70,000
Rails To Trails Conservancy · Washington, DC · 2022
Advance circuit trails
- $70,000
Rails To Trails Conservancy · Washington, DC · 2022
Advance circuit trails
- $62,500
East Coast Greenway Alliance · Durham, NC · 2022
Promoting east coast greenway trail development
- $62,500
East Coast Greenway Alliance · Durham, NC · 2022
Promoting east coast greenway trail development
- $45,000
Delaware Greenways · Wilmington, DE · 2022
Advance trail development in northern de
- $45,000
Delaware Greenways · Wilmington, DE · 2022
Advance trail development in northern de
- $44,000
New Jersey Conservation Foundation · Far Hills, NJ · 2022
Gateway park activation and circuit trails
- $44,000
New Jersey Conservation Foundation · Far Hills, NJ · 2022
Gateway park activation and circuit trails
Top recipients
Repeat recipients are the strongest signal of whether a funder has an open door or quietly re-funds the same organizations.
- National Philanthropic Trust12 grants · $61.0M
- National Wildlife Federation12 grants · $10.0M
- National Nurse-Led Care Consortium4 grants · $9.7M
- Philadelphia City Fund24 grants · $9.0M
- Fairmount Park Conservancy9 grants · $8.7M
- Reinvestment Fund9 grants · $8.2M
- Delaware River Waterfront Corporation5 grants · $8.0M
- Open Space Institute Land Trust8 grants · $7.6M
- Fund for Philadelphia18 grants · $7.0M
- Project Home15 grants · $6.4M
Giving over time
Grant history
The 100 largest of 4,421 grants.
- $14.4M
National Philanthropic Trust · Jenkintown, PA · 2022
Implement the rebuild initiative
- $14.4M
National Philanthropic Trust · Jenkintown, PA · 2022
Implement the rebuild initiative
- $11.0M
National Philanthropic Trust · Jenkintown, PA · 2023
Implement the rebuild initiative
- $7.8M
National Philanthropic Trust · Jenkintown, PA · 2024
Implement the rebuild initiative
- $7.0M
Delaware River Waterfront Corporation · Philadelphia, PA · 2024
Construction of penn's landing park
- $6.1M
Project Home · Philadelphia, PA · 2023
Transitional housing support
- $5.0M
Philadelphia Orchestra and Kimmel Center · Philadelphia, PA · 2024
Capital campaign 2024
- $5.0M
Share Food Program · Philadelphia, PA · 2023
Share capital campaign
- $4.0M
National Philanthropic Trust · Jenkintown, PA · 2022
2026 collaborative fund
- $4.0M
National Philanthropic Trust · Jenkintown, PA · 2022
2026 collaborative fund
- $3.5M
Fairmount Park Conservancy · Philadelphia, PA · 2024
Capital improvements and planning for fdr park
- $3.1M
National Nurse-Led Care Consortium · Philadelphia, PA · 2023
Basic needs fund for home visited families
- $3.0M
Zoological Society of Philadelphia · Philadelphia, PA · 2024
Capital campaign 2024
- $2.7M
Open Space Institute Land Trust · New York, NY · 2022
Phase 2 drwi land protection capital re-grant fund
- $2.7M
Open Space Institute Land Trust · New York, NY · 2022
Phase 2 drwi land protection capital re-grant fund
- $2.6M
Habitat for Humanity Philadelphia · Philadelphia, PA · 2023
Home repair program
- $2.5M
Fairmount Park Conservancy · Philadelphia, PA · 2024
Centennial gateway at the welsh fountain
- $2.3M
National Nurse-Led Care Consortium · Philadelphia, PA · 2022
Basic needs fund for home visited families
- $2.3M
National Nurse-Led Care Consortium · Philadelphia, PA · 2022
Basic needs fund for home visited families
- $2.1M
National Wildlife Federation · Reston, VA · 2022
Alliance for watershed education
- $2.1M
National Wildlife Federation · Reston, VA · 2022
Alliance for watershed education
- $2.0M
John Bartram Association · Philadelphia, PA · 2022
Build a new 12,000 square foot ecosystems education center
- $2.0M
John Bartram Association · Philadelphia, PA · 2022
Build a new 12,000 square foot ecosystems education center
- $2.0M
Center City District Foundation · Philadelphia, PA · 2024
Reading viaduct acquisition & design
- $2.0M
Mann Center for the Performing Arts · Philadelphia, PA · 2024
Capital campaign 2024
- $2.0M
National Nurse-Led Care Consortium · Philadelphia, PA · 2024
Basic needs fund for home visited families.
- $2.0M
Pennsylvania Ballet Association · Philadelphia, PA · 2024
Capital campaign 2024
- $2.0M
Philadelphia Clef Club of the Performing Arts · Philadelphia, PA · 2024
Capital campaign 2024
- $2.0M
Pennsylvania Horticultural Society · Philadelphia, PA · 2022
General operating funds to support the philadelphia horticultural society?s community programs
- $2.0M
Pennsylvania Horticultural Society · Philadelphia, PA · 2022
General operating funds to support the philadelphia horticultural society?s community programs
- $1.9M
Reinvestment Fund · Philadelphia, PA · 2023
Phase 3: planning and capital to support high quality early learning facility expansion
- $1.9M
Reinvestment Fund · Philadelphia, PA · 2022
Phase 3: planning and capital to support high quality early learning facility expansion
- $1.9M
Reinvestment Fund · Philadelphia, PA · 2022
Phase 3: planning and capital to support high quality early learning facility expansion
- $1.9M
Delaware Valley Regional Planning Commission · Philadelphia, PA · 2023
Regional trails program
- $1.9M
National Wildlife Federation · Reston, VA · 2024
Alliance for watershed education (for 23 centers)
- $1.8M
Lenfest Institute for Journalism · Philadelphia, PA · 2022
Every voice, every vote implementation
- $1.8M
Lenfest Institute for Journalism · Philadelphia, PA · 2022
Every voice, every vote implementation
- $1.6M
National Fish and Wildlife Foundation · Washington, DC · 2022
Phase 2+ drwi - capital re-grant fund
- $1.6M
National Fish and Wildlife Foundation · Washington, DC · 2022
Phase 2+ drwi - capital re-grant fund
- $1.6M
Fund for Philadelphia · Philadelphia, PA · 2022
Spring garden street greenway design/engineering
- $1.6M
Fund for Philadelphia · Philadelphia, PA · 2022
Spring garden street greenway design/engineering
- $1.6M
Philadelphia Energy Authority · Philadelphia, PA · 2023
Catalyzing federal climate investment through coordination and home repair
- $1.5M
Kaboom · Bethesda, MD · 2023
Play everywhere challenge round 2
- $1.5M
Philadelphia Soccer 2026 · Philadelphia, PA · 2024
Lemon hill world cup capital project
- $1.5M
Reinvestment Fund · Philadelphia, PA · 2024
Fund for quality to increase supply of quality early childhood education seats.
- $1.5M
First Step Staffing · Philadelphia, PA · 2023
Expansion of second step program and pilot resource navigation
- $1.5M
National Philanthropic Trust · Jenkintown, PA · 2022
America's cultural treasures initiative
- $1.5M
National Philanthropic Trust · Jenkintown, PA · 2022
America's cultural treasures initiative
- $1.5M
Philadelphia Foundation · Philadelphia, PA · 2022
Civic coalition to reduce gun deaths
- $1.5M
Philadelphia Foundation · Philadelphia, PA · 2022
Civic coalition to reduce gun deaths
- $1.4M
Whyy · Philadelphia, PA · 2022
Create literacy focused children's television programming
- $1.4M
Whyy · Philadelphia, PA · 2022
Create literacy focused children's television programming
- $1.4M
National Wildlife Federation · Reston, VA · 2023
Alliance for watershed education
- $1.4M
Sand County Foundation · Madison, WI · 2022
2022 epic funding navigator
- $1.4M
Sand County Foundation · Madison, WI · 2022
2022 epic funding navigator
- $1.3M
Philadelphia Housing Development Corporation · Philadelphia, PA · 2023
Phl rentassist-direct
- $1.3M
Philadelphia City Fund · Philadelphia, PA · 2024
The chinatown stitch: reconnecting philadelphia's chinatown
- $1.3M
Philadelphia Energy Authority · Philadelphia, PA · 2024
Catalyzing federal climate investment through coordination and home repair
- $1.2M
The Corps Network · Washington, DC · 2023
Tcn 2023 drcc transition
- $1.2M
Cobbs Creek Restoration and Community Foundation · West Conshohocken, PA · 2022
Cobbs creek golf course and education center
- $1.2M
Cobbs Creek Restoration and Community Foundation · West Conshohocken, PA · 2022
Cobbs creek golf course and education center
- $1.2M
Philadelphia Works · Philadelphia, PA · 2023
Coordinated family support to access full snap benefits
- $1.1M
Philadelphia Works · Philadelphia, PA · 2024
Coordinated family support to access full snap benefits
- $1.1M
New Jersey Conservation Foundation · Far Hills, NJ · 2023
Solar vessel
- $1.1M
Bread and Roses Community Fund · Philadelphia, PA · 2022
Climate justice fund
- $1.1M
Bread and Roses Community Fund · Philadelphia, PA · 2022
Climate justice fund
- $1.1M
Fairmount Park Conservancy · Philadelphia, PA · 2023
Capital improvements and planning for fdr park
- $1.1M
Hace - Hispanic Association of Contractors and Enterprises · Philadelphia, PA · 2022
Complete construction of rail yard park
- $1.1M
Hace - Hispanic Association of Contractors and Enterprises · Philadelphia, PA · 2022
Complete construction of rail yard park
- $1.1M
Rodale Institute · Kutztown, PA · 2023
Rodale stroud soil health
- $1.0M
Lenfest Institute for Journalism · Philadelphia, PA · 2024
Post-election accountability
- $1.0M
Jastech Development Services · Philadelphia, PA · 2024
Greater philadelphia tctac
- $1.0M
National Philanthropic Trust · Jenkintown, PA · 2024
2026 collaborative fund
- $1.0M
Philadelphia City Fund · Philadelphia, PA · 2024
Urban agriculture plan implementation
- $1.0M
Academy of Natural Sciences of Drexel University · Philadelphia, PA · 2023
Phase 2+ drwi - science support
- $1.0M
Delaware Valley Regional Planning Commission · Philadelphia, PA · 2023
Regional climate funding planning and coordination
- $1.0M
National Philanthropic Trust · Jenkintown, PA · 2023
America's cultural treasures initiative
- $1.0M
New Venture Fund · Washington, DC · 2023
Culture and community well-being
- $1.0M
Philadelphia Soccer 2026 · Philadelphia, PA · 2023
World cup 2026
- $1.0M
Welcome America · Philadelphia, PA · 2023
Coordination for 2026
- $1.0M
Academy of Natural Sciences of Drexel University · Philadelphia, PA · 2022
Phase 2+ drwi - science support
- $1.0M
Academy of Natural Sciences of Drexel University · Philadelphia, PA · 2022
Phase 2+ drwi - science support
- $1.0M
Cp2023 · Philadelphia, PA · 2022
Calder philadelphia
- $1.0M
Cp2023 · Philadelphia, PA · 2022
Calder philadelphia
- $1.0M
Delaware Riverkeeper Network · Bristol, PA · 2022
2022 drn - stream designations/ research based advocacy
- $1.0M
Delaware Riverkeeper Network · Bristol, PA · 2022
2022 drn - stream designations/ research based advocacy
- $1.0M
New Venture Fund · Washington, DC · 2022
Culture and community well-being
- $1.0M
New Venture Fund · Washington, DC · 2022
Culture and community well-being
- $1.0M
The Corps Network · Washington, DC · 2022
2021 tcn - del riv climate corps implementation
- $1.0M
The Corps Network · Washington, DC · 2022
2021 tcn - del riv climate corps implementation
- $1.0M
William Way Lgbt Community Center · Philadelphia, PA · 2022
Renovate and rebuild community center
- $1.0M
William Way Lgbt Community Center · Philadelphia, PA · 2022
Renovate and rebuild community center
- $984,500
Called To Serve Cdc · Philadelphia, PA · 2022
Construct the reverend leon h. Sullivan community impact center
- $984,500
Called To Serve Cdc · Philadelphia, PA · 2022
Construct the reverend leon h. Sullivan community impact center
- $971,000
Philadelphia Foundation · Philadelphia, PA · 2024
Philadelphia community gift fund
- $971,000
Sand County Foundation · Madison, WI · 2023
2022 epic funding navigator
- $954,100
Philadelphia City Fund · Philadelphia, PA · 2024
Philly joy bank
- $933,530
Rodale Institute · Kutztown, PA · 2022
Rodale stroud soil health
- $933,530
Rodale Institute · Kutztown, PA · 2022
Rodale stroud soil health
- $932,000
Congreso De Latinos Unidos · Philadelphia, PA · 2023
Exito k-3 literacy strategy
Who else funds this kind of work
Same state
- Upmc Group1,211 grants · $569.1M
- University of Pittsburgh1,460 grants · $577.6M
- Richard King Mellon Foundation1,140 grants · $467.4M
Similar purposes
- Sherman Fairchild Foundation250 grants · $152.0M
- M J Murdock Charitable Trust2,400 grants · $283.0M
- Ghr Foundation540 grants · $120.4M
Similar grant size
- Ohio Child Care Resource and Referral16,278 grants · $1.08B
- Gs Donor Advised Philanthropy Fund19,135 grants · $6.79B
- The Chicago Community Trust14,939 grants · $5.82B
Grants already paid are the record; PaperOrbit reads your paper and finds the funders whose record matches it — then explains why.
Search funders like this oneSource: IRS Form 990-PF, Part XV, as filed by the foundation. These are grants already paid — a record of what this funder backs, not an open call.

