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Find who already funds work like yours.

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 “cleaning”

Where the money went

1.0×
The Bloomberg Family Foundation Inc → Resources Legacy Fund: $83M across 3 grants, latest 2024Sequoia Climate Foundation → Stichting European Climate Foundation: $39M across 7 grants, latest 2023Climate Imperative Foundation → The Energy Foundation: $27M across 1 grant, latest 2023United States Energy Foundation → Climate Power: $21M across 1 grant, latest 2024Multiplier → United States Energy Foundation: $6.9M across 2 grants, latest 2024The Mcknight Foundation → New Venture Fund: $4.0M across 2 grants, latest 2023Energy Action Fund → Tides Advocacy: $3.7M across 4 grants, latest 2024Barr Foundation → (298) United States Energy Foundation: $3.4M across 1 grant, latest 2023Iqair Foundation → Other School Sites: $2.1M across 6 grants, latest 2024Sustainable Markets Foundation → 350seattle: $1.4M across 3 grants, latest 2023The Heinz Endowments → Clean Air Council: $1.4M across 9 grants, latest 2024Keep Louisiana Beautiful Inc → Shreveport Green: $20K across 2 grants, latest 2022The Bloomberg Family Foundation Inc → Climateworks Foundation: $68M across 2 grants, latest 2023Climate Imperative Foundation → Sierra Club Foundation: $26M across 1 grant, latest 2023United States Energy Foundation → Fund for A Better Future Inc: $20M across 1 grant, latest 2023Sequoia Climate Foundation → The Sunrise Project Australia Ltd: $19M across 5 grants, latest 2023Multiplier → American Council On Renewable Energy: $4.8M across 4 grants, latest 2024Barr Foundation → (245) United States Energy Foundation: $3.3M across 1 grant, latest 2022The Mcknight Foundation → Climate and Clean Energy Equity Fund: $2.5M across 2 grants, latest 2024Energy Action Fund → League of Conservation Voters Inc: $1.7M across 3 grants, latest 2024The Heinz Endowments → Pennenvironment Research and Policy Center: $1.1M across 5 grants, latest 2024Iqair Foundation → Atem X Residential: $713K across 1 grant, latest 2024Sustainable Markets Foundation → Changing Markets Fdn Inc: $675K across 2 grants, latest 2023Keep Louisiana Beautiful Inc → Webster Parish Police Jury: $18K across 1 grant, latest 2022The Bloomberg Family Foundation Inc → The Clean Air Fund: $28M across 3 grants, latest 2024Climate Imperative Foundation → United States Energy Foundation: $20M across 1 grant, latest 2023Sequoia Climate Foundation → United States Energy Foundation: $19M across 5 grants, latest 2023United States Energy Foundation → Advanced Energy Institute: $7.3M across 3 grants, latest 2024Multiplier → Rocky Mountain Institute: $3.4M across 3 grants, latest 2024Barr Foundation → (855) United States Energy Foundation: $3.3M across 1 grant, latest 2024The Mcknight Foundation → Windward Fund: $2.2M across 4 grants, latest 2023Energy Action Fund → Conservatives for A Clean Energy Future: $1.7M across 4 grants, latest 2024The Heinz Endowments → Clean Air Task Force Inc: $1.0M across 5 grants, latest 2024Sustainable Markets Foundation → Oil Change International: $508K across 3 grants, latest 2023Iqair Foundation → Calexico High School: $411K across 4 grants, latest 2024Keep Louisiana Beautiful Inc → University of New Orleans: $17K across 1 grant, latest 2022The Bloomberg Family Foundation Inc → United States Energy Foundation: $25M across 3 grants, latest 2024The Bloomberg Family Foundation Inc → Earthjustice: $23M across 3 grants, latest 2024The Bloomberg Family Foundation Inc → Stichting European Climate Foundation: $22M across 3 grants, latest 2024The Bloomberg Family Foundation Inc → C40 Cities Climate Leadership Group Inc: $21M across 2 grants, latest 2024Climate Imperative Foundation → The Energy Foundation: $19M across 1 grant, latest 2022The Bloomberg Family Foundation Inc → Climate Imperative Foundation: $18M across 1 grant, latest 2022The Bloomberg Family Foundation Inc → Rocky Mountain Institute: $16M across 3 grants, latest 2024Sequoia Climate Foundation → Tara Climate Ltd: $16M across 2 grants, latest 2022Climate Imperative Foundation → Rocky Mountain Institute: $14M across 1 grant, latest 2023Climate Imperative Foundation → Sierra Club Foundation Fbo Sierra Club California: $13M across 1 grant, latest 2022The Bloomberg Family Foundation Inc → Asian Development Bank: $13M across 1 grant, latest 2022The Bloomberg Family Foundation Inc → Carbon Mapper Inc: $12M across 2 grants, latest 2023The Bloomberg Family Foundation Inc → Sierra Club Foundation: $11M across 1 grant, latest 2022Climate Imperative Foundation → United States Energy Foundation: $10M across 1 grant, latest 2022The Bloomberg Family Foundation Inc → Environmental Defense Fund Incorporated: $10M across 3 grants, latest 2024The Bloomberg Family Foundation Inc → United Nations: $9.8M across 2 grants, latest 2023The Bloomberg Family Foundation Inc → Coalfield Development Corporation: $9.5M across 1 grant, latest 2022The Bloomberg Family Foundation Inc → Natural Resources Defense Council Inc: $8.7M across 3 grants, latest 2024Sequoia Climate Foundation → League of Conservation Voters Education Fund: $8.2M across 3 grants, latest 2023The Bloomberg Family Foundation Inc → Johns Hopkins University: $8.2M across 3 grants, latest 2024Sequoia Climate Foundation → International Council On Clean Transportation: $8.1M across 3 grants, latest 2023The Bloomberg Family Foundation Inc → United Nations Environment Programme: $8.1M across 2 grants, latest 2024The Bloomberg Family Foundation Inc → Council On Energy Environment and Water: $7.9M across 3 grants, latest 2024Climate Imperative Foundation → Natural Resources Defense Council: $7.4M across 1 grant, latest 2023United States Energy Foundation → The Partnership Project Inc: $7.2M across 3 grants, latest 2024Sequoia Climate Foundation → Meliore Foundation (Fup): $7.0M across 2 grants, latest 2023The Bloomberg Family Foundation Inc → University of Maryland: $6.0M across 3 grants, latest 2024United States Energy Foundation → Conservative Energy Network: $5.8M across 3 grants, latest 2024The Bloomberg Family Foundation Inc: $406M on this topic. Open the funder.The Bloomberg Family Foundati…$406MClimate Imperative Foundation: $136M on this topic. Open the funder.Climate Imperative Foundation$136MSequoia Climate Foundation: $117M on this topic. Open the funder.Sequoia Climate Foundation$117MUnited States Energy Foundation: $61M on this topic. Open the funder.United States Energy Foundati…$61MMultiplier: $15M on this topic. Open the funder.Multiplier$15MBarr Foundation: $10.0M on this topic. Open the funder.Barr Foundation$10.0MThe Mcknight Foundation: $8.7M on this topic. Open the funder.The Mcknight Foundation$8.7MEnergy Action Fund: $7.1M on this topic. Open the funder.Energy Action Fund$7.1MThe Heinz Endowments: $3.4M on this topic. Open the funder.The Heinz Endowments$3.4MIqair Foundation: $3.2M on this topic. Open the funder.Iqair Foundation$3.2MSustainable Markets Foundation: $2.6M on this topic. Open the funder.Sustainable Markets Foundation$2.6MKeep Louisiana Beautiful Inc: $55K on this topic. Open the funder.Keep Louisiana Beautiful Inc$55KResources Legacy Fund: received $83M on this topicResources Legacy Fund$83MClimateworks Foundation: received $68M on this topicClimateworks Foundation$68MUnited States Energy Foundation: received $61M on this topicUnited States Energy Foundation$61MStichting European Climate Foundation: received $61M on this topicStichting European Climate Foun…$61MThe Clean Air Fund: received $28M on this topicThe Clean Air Fund$28MThe Energy Foundation: received $27M on this topicThe Energy Foundation$27MSierra Club Foundation: received $26M on this topicSierra Club Foundation$26MEarthjustice: received $23M on this topicEarthjustice$23MClimate Power: received $21M on this topicClimate Power$21MC40 Cities Climate Leadership Group Inc: received $21M on this topicC40 Cities Climate Leadership G…$21MFund for A Better Future Inc: received $20M on this topicFund for A Better Future Inc$20MRocky Mountain Institute: received $20M on this topicRocky Mountain Institute$20MUnited States Energy Foundation: received $20M on this topicUnited States Energy Foundation$20MThe Sunrise Project Australia Ltd: received $19M on this topicThe Sunrise Project Australia L…$19MThe Energy Foundation: received $19M on this topicThe Energy Foundation$19MClimate Imperative Foundation: received $18M on this topicClimate Imperative Foundation$18MTara Climate Ltd: received $16M on this topicTara Climate Ltd$16MRocky Mountain Institute: received $14M on this topicRocky Mountain Institute$14MSierra Club Foundation Fbo Sierra Club California: received $13M on this topicSierra Club Foundation Fbo Sier…$13MAsian Development Bank: received $13M on this topicAsian Development Bank$13MCarbon Mapper Inc: received $12M on this topicCarbon Mapper Inc$12MSierra Club Foundation: received $11M on this topicSierra Club Foundation$11MEnvironmental Defense Fund Incorporated: received $10M on this topicEnvironmental Defense Fund Inco…$10MUnited Nations: received $9.8M on this topicUnited Nations$9.8MCoalfield Development Corporation: received $9.5M on this topicCoalfield Development Corporati…$9.5MNatural Resources Defense Council Inc: received $8.7M on this topicNatural Resources Defense Counc…$8.7MLeague of Conservation Voters Education Fund: received $8.2M on this topicLeague of Conservation Voters E…$8.2MJohns Hopkins University: received $8.2M on this topicJohns Hopkins University$8.2MInternational Council On Clean Transportation: received $8.1M on this topicInternational Council On Clean…$8.1MUnited Nations Environment Programme: received $8.1M on this topicUnited Nations Environment Prog…$8.1MCouncil On Energy Environment and Water: received $7.9M on this topicCouncil On Energy Environment a…$7.9MNatural Resources Defense Council: received $7.4M on this topicNatural Resources Defense Counc…$7.4MAdvanced Energy Institute: received $7.3M on this topicAdvanced Energy Institute$7.3MThe Partnership Project Inc: received $7.2M on this topicThe Partnership Project Inc$7.2MMeliore Foundation (Fup): received $7.0M on this topicMeliore Foundation (Fup)$7.0MUniversity of Maryland: received $6.0M on this topicUniversity of Maryland$6.0MConservative Energy Network: received $5.8M on this topicConservative Energy Network$5.8MAmerican Council On Renewable Energy: received $4.8M on this topicAmerican Council On Renewable E…$4.8MNew Venture Fund: received $4.0M on this topicNew Venture Fund$4.0MTides Advocacy: received $3.7M on this topicTides Advocacy$3.7M(298) United States Energy Foundation: received $3.4M on this topic(298) United States Energy Foun…$3.4M(245) United States Energy Foundation: received $3.3M on this topic(245) United States Energy Foun…$3.3M(855) United States Energy Foundation: received $3.3M on this topic(855) United States Energy Foun…$3.3MClimate and Clean Energy Equity Fund: received $2.5M on this topicClimate and Clean Energy Equity…$2.5MWindward Fund: received $2.2M on this topicWindward Fund$2.2MOther School Sites: received $2.1M on this topicOther School Sites$2.1MLeague of Conservation Voters Inc: received $1.7M on this topicLeague of Conservation Voters I…$1.7MConservatives for A Clean Energy Future: received $1.7M on this topicConservatives for A Clean Energ…$1.7M350seattle: received $1.4M on this topic350seattle$1.4MClean Air Council: received $1.4M on this topicClean Air Council$1.4MPennenvironment Research and Policy Center: received $1.1M on this topicPennenvironment Research and Po…$1.1MClean Air Task Force Inc: received $1.0M on this topicClean Air Task Force Inc$1.0MAtem X Residential: received $713K on this topicAtem X Residential$713KChanging Markets Fdn Inc: received $675K on this topicChanging Markets Fdn Inc$675KOil Change International: received $508K on this topicOil Change International$508KCalexico High School: received $411K on this topicCalexico High School$411KShreveport Green: received $20K on this topicShreveport Green$20KWebster Parish Police Jury: received $18K on this topicWebster Parish Police Jury$18KUniversity of New Orleans: received $17K on this topicUniversity of New Orleans$17K
12 funders, 59 recipients, grants matching “cleaning” 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 →