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Private foundations don’t post open calls, so nobody can search them. We read IRS filings instead — 9.6 million grants from 174,053 foundations and grantmaking charities, searchable by what the money was actually for.

12 funders with a record of paying for “cleanup”

Where the money went

1.0×
National Fish and Wildlife Foundation → Florida Fish and Wildlife Conservation Commission: $3.0M across 1 grant, latest 2023Crankstart Foundation → Rockefeller Family Fund: $1.3M across 1 grant, latest 2024Seattle Foundation → Duwamish River Cleanup Coalition: $628K across 11 grants, latest 2024Grousemont Foundation → Duwamish River Cleanup Coalition-Technical Advisory Group: $510K across 3 grants, latest 2023The Satterberg Foundation Inc → Duwamish River Cleanup Coalition: $390K across 4 grants, latest 2024Snowy Mountain Development Corp → Olympus Technical Services: $296K across 2 grants, latest 2022The Kosasa Foundation → 808 Cleanups: $125K across 3 grants, latest 2024Ladybug Foundation Inc → Ocean Voyages Institute: $125K across 3 grants, latest 2024Ocean Conservancy → Puget Soundkeeper Alliance: $75K across 1 grant, latest 2023Wells Fargo Foundation → Mercy Housing Inc: $50K across 1 grant, latest 2025Moccasin Lake Foundation → Duwamish River Cleanup Coalition-Technical Advisor: $42K across 2 grants, latest 2023Ting Tsung & Wei Fong Chao Foundation → Ocean Cleanup North Pacific Foundation Dba the Ocean Cleanup: $40K across 2 grants, latest 2022Crankstart Foundation → New York University: $625K across 1 grant, latest 2024Grousemont Foundation → Duwamish River Cleanup Coalition: $300K across 1 grant, latest 2024Snowy Mountain Development Corp → Safetech Inc: $231K across 2 grants, latest 2022Ladybug Foundation Inc → Committee to Bridge the Gap: $118K across 1 grant, latest 2024The Kosasa Foundation → Sustainable Coastlines Hawai'i: $73K across 1 grant, latest 2024Wells Fargo Foundation → Solve: $30K across 1 grant, latest 2024Seattle Foundation → The Ocean Cleanup North Pacific Foundation: $30K across 3 grants, latest 2023Moccasin Lake Foundation → American Friends of the Ocean Cleanup Foundation: $20K across 1 grant, latest 2024Ocean Conservancy → The Resistance: $20K across 1 grant, latest 2022Ting Tsung & Wei Fong Chao Foundation → American Friends of the Ocean Cleanup Foundation: $20K across 1 grant, latest 2024National Fish and Wildlife Foundation → New Hampshire Fish and Game Department: $11K across 1 grant, latest 2023Crankstart Foundation → Center for Biological Diversity Inc: $625K across 1 grant, latest 2024Snowy Mountain Development Corp → Crowly Blockbighorn Valley Health Clinic: $118K across 1 grant, latest 2021Ladybug Foundation Inc → Physicians for Social Responsibilit: $100K across 2 grants, latest 2023Wells Fargo Foundation → Natural Restorations: $25K across 1 grant, latest 2025Ting Tsung & Wei Fong Chao Foundation → American Friends of the Ocean Cleanup Foundation Dba the Ocean Cleanup: $20K across 1 grant, latest 2023Ocean Conservancy → Friends of the Environment Inc: $10K across 1 grant, latest 2022National Fish and Wildlife Foundation → Ocean Aid 360 Inc: $10K across 1 grant, latest 2023Moccasin Lake Foundation → I Heart Downtown Seattle: $3K across 1 grant, latest 2022Snowy Mountain Development Corp → Wwc Engineering: $78K across 3 grants, latest 2024Snowy Mountain Development Corp → Perfect 10 Roofing: $65K across 1 grant, latest 2024Snowy Mountain Development Corp → Biegals Barcity of Harlowton: $23K across 1 grant, latest 2021Snowy Mountain Development Corp → Trihydro Corporation: $21K across 2 grants, latest 2022Snowy Mountain Development Corp → Wgm Group: $21K across 2 grants, latest 2022Wells Fargo Foundation → Tree Trust: $20K across 1 grant, latest 2025Snowy Mountain Development Corp → Tetra Tech Inc: $16K across 1 grant, latest 2024Wells Fargo Foundation → Lake Street Council: $15K across 1 grant, latest 2024Wells Fargo Foundation → Tree Trust: $15K across 1 grant, latest 2024Snowy Mountain Development Corp → Hilger Meatscountry Store: $11K across 1 grant, latest 2021Ocean Conservancy → Inuit Circumpolar Council Alaska: $10K across 1 grant, latest 2022Ocean Conservancy → Save Our Shores: $10K across 1 grant, latest 2022Ocean Conservancy → Puget Soundkeeper Alliance: $10K across 1 grant, latest 2022Ocean Conservancy → Mariposa Dr Foundation: $10K across 1 grant, latest 2023Ocean Conservancy → Center for Alaskan Coastal Studies: $10K across 1 grant, latest 2022Ocean Conservancy → Buffalo Niagara Waterkeeper Inc: $10K across 1 grant, latest 2021Ocean Conservancy → Takshanuk Watershed Council: $10K across 1 grant, latest 2022Ocean Conservancy → Sitka Sound Science Center: $10K across 1 grant, latest 2022Ocean Conservancy → Scuba Dogs Society: $10K across 1 grant, latest 2022Ocean Conservancy → Friends of Padre Inc: $8K across 1 grant, latest 2023Snowy Mountain Development Corp → Stockmans Barcity of Roundup: $7K across 1 grant, latest 2021National Fish and Wildlife Foundation → Town of Rockport: $5K across 1 grant, latest 2023National Fish and Wildlife Foundation: $3.0M on this topic. Open the funder.National Fish and Wildlife Fo…$3.0MCrankstart Foundation: $2.5M on this topic. Open the funder.Crankstart Foundation$2.5MSnowy Mountain Development Corp: $887K on this topic. Open the funder.Snowy Mountain Development Co…$887KGrousemont Foundation: $810K on this topic. Open the funder.Grousemont Foundation$810KSeattle Foundation: $658K on this topic. Open the funder.Seattle Foundation$658KThe Satterberg Foundation Inc: $390K on this topic. Open the funder.The Satterberg Foundation Inc$390KLadybug Foundation Inc: $343K on this topic. Open the funder.Ladybug Foundation Inc$343KOcean Conservancy: $203K on this topic. Open the funder.Ocean Conservancy$203KThe Kosasa Foundation: $198K on this topic. Open the funder.The Kosasa Foundation$198KWells Fargo Foundation: $155K on this topic. Open the funder.Wells Fargo Foundation$155KTing Tsung & Wei Fong Chao Foundation: $80K on this topic. Open the funder.Ting Tsung & Wei Fong Chao Fo…$80KMoccasin Lake Foundation: $65K on this topic. Open the funder.Moccasin Lake Foundation$65KFlorida Fish and Wildlife Conservation Commission: received $3.0M on this topicFlorida Fish and Wildlife Conse…$3.0MDuwamish River Cleanup Coalition: received $1.3M on this topicDuwamish River Cleanup Coalition$1.3MRockefeller Family Fund: received $1.3M on this topicRockefeller Family Fund$1.3MNew York University: received $625K on this topicNew York University$625KCenter for Biological Diversity Inc: received $625K on this topicCenter for Biological Diversity…$625KDuwamish River Cleanup Coalition-Technical Advisory Group: received $510K on this topicDuwamish River Cleanup Coalitio…$510KOlympus Technical Services: received $296K on this topicOlympus Technical Services$296KSafetech Inc: received $231K on this topicSafetech Inc$231K808 Cleanups: received $125K on this topic808 Cleanups$125KOcean Voyages Institute: received $125K on this topicOcean Voyages Institute$125KCrowly Blockbighorn Valley Health Clinic: received $118K on this topicCrowly Blockbighorn Valley Heal…$118KCommittee to Bridge the Gap: received $118K on this topicCommittee to Bridge the Gap$118KPhysicians for Social Responsibilit: received $100K on this topicPhysicians for Social Responsib…$100KWwc Engineering: received $78K on this topicWwc Engineering$78KPuget Soundkeeper Alliance: received $75K on this topicPuget Soundkeeper Alliance$75KSustainable Coastlines Hawai'i: received $73K on this topicSustainable Coastlines Hawai'i$73KPerfect 10 Roofing: received $65K on this topicPerfect 10 Roofing$65KMercy Housing Inc: received $50K on this topicMercy Housing Inc$50KDuwamish River Cleanup Coalition-Technical Advisor: received $42K on this topicDuwamish River Cleanup Coalitio…$42KOcean Cleanup North Pacific Foundation Dba the Ocean Cleanup: received $40K on this topicOcean Cleanup North Pacific Fou…$40KAmerican Friends of the Ocean Cleanup Foundation: received $40K on this topicAmerican Friends of the Ocean C…$40KSolve: received $30K on this topicSolve$30KThe Ocean Cleanup North Pacific Foundation: received $30K on this topicThe Ocean Cleanup North Pacific…$30KNatural Restorations: received $25K on this topicNatural Restorations$25KBiegals Barcity of Harlowton: received $23K on this topicBiegals Barcity of Harlowton$23KTrihydro Corporation: received $21K on this topicTrihydro Corporation$21KWgm Group: received $21K on this topicWgm Group$21KThe Resistance: received $20K on this topicThe Resistance$20KAmerican Friends of the Ocean Cleanup Foundation Dba the Ocean Cleanup: received $20K on this topicAmerican Friends of the Ocean C…$20KTree Trust: received $20K on this topicTree Trust$20KTetra Tech Inc: received $16K on this topicTetra Tech Inc$16KLake Street Council: received $15K on this topicLake Street Council$15KTree Trust: received $15K on this topicTree Trust$15KNew Hampshire Fish and Game Department: received $11K on this topicNew Hampshire Fish and Game Dep…$11KHilger Meatscountry Store: received $11K on this topicHilger Meatscountry Store$11KFriends of the Environment Inc: received $10K on this topicFriends of the Environment Inc$10KOcean Aid 360 Inc: received $10K on this topicOcean Aid 360 Inc$10KInuit Circumpolar Council Alaska: received $10K on this topicInuit Circumpolar Council Alaska$10KSave Our Shores: received $10K on this topicSave Our Shores$10KPuget Soundkeeper Alliance: received $10K on this topicPuget Soundkeeper Alliance$10KMariposa Dr Foundation: received $10K on this topicMariposa Dr Foundation$10KCenter for Alaskan Coastal Studies: received $10K on this topicCenter for Alaskan Coastal Stud…$10KBuffalo Niagara Waterkeeper Inc: received $10K on this topicBuffalo Niagara Waterkeeper Inc$10KTakshanuk Watershed Council: received $10K on this topicTakshanuk Watershed Council$10KSitka Sound Science Center: received $10K on this topicSitka Sound Science Center$10KScuba Dogs Society: received $10K on this topicScuba Dogs Society$10KFriends of Padre Inc: received $8K on this topicFriends of Padre Inc$8KStockmans Barcity of Roundup: received $7K on this topicStockmans Barcity of Roundup$7KTown of Rockport: received $5K on this topicTown of Rockport$5KI Heart Downtown Seattle: received $3K on this topicI Heart Downtown Seattle$3K
12 funders, 50 recipients, grants matching “cleanup” only. Ribbon width is proportional to the total given; each funder has its own colour (smaller funders in gray). Hover a name to isolate its flows, click a funder to open it. Drag to move around; zoom with the buttons, a double-click, or the wheel after clicking the map.

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Source: IRS Form 990-PF Part XV and Form 990 Schedule I, tax years 2019–2025. These are grants already paid, a record of what an organization funds rather than an open call. Private foundations rarely accept unsolicited applications and the route in is usually a program officer; grantmaking charities and associations more often run real application cycles, so check their website. How this data is built, and its limits →