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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 “amateur”

Where the money went

1.0×
Amateur Radio Digital Communications → Internet Archive: $1.2M across 2 grants, latest 2025The Chicago Community Trust → Evans Scholars Foundation: $760K across 3 grants, latest 2022Oneamerica Foundation Inc → United Way of Central Indiana: $327K across 1 grant, latest 2024The Pittsburgh Foundation → The First Tee of Pittsburgh: $178K across 2 grants, latest 2024Quarter Century Wireless Association Inc → Foundation for Amateur Radio Inc: $151K across 3 grants, latest 2023Cape Cod Baseball League Inc → Falmouth Baseball Club Inc Dba Falmouth Commodores: $71K across 3 grants, latest 2024New England Yankee Hockey → New Hampshire Amateur Hockey: $56K across 3 grants, latest 2024The Yasme Foundation → Ottawa Amateur Radio Club Inc: $39K across 3 grants, latest 2023Arrl Foundation Inc → Gloucester County Amateur Radio Club - W2mmd: $25K across 1 grant, latest 2022North Carolina Amateur Sports Inc → Black Girls Do Bikeplayers Philanthropy Fund: $21K across 2 grants, latest 2023Louis W Horvath Foundation Inc → Cowboy Joe Club: $17K across 4 grants, latest 2025Amateur Athletic Union of the Us Inc → Amateur Athletic Union of Michigan: $10K across 1 grant, latest 2020Amateur Radio Digital Communications → Deutscher Amateur Radio Club (Darc) Ev: $778K across 4 grants, latest 2022Cape Cod Baseball League Inc → Harwich Athletic Association Inc Dba Harwich Mariners: $68K across 3 grants, latest 2024Oneamerica Foundation Inc → Howard University Dept of Athletics: $65K across 1 grant, latest 2024New England Yankee Hockey → Maine Amateur Hockey Association I: $55K across 3 grants, latest 2024Quarter Century Wireless Association Inc → Dayton Amateur Radio Assn Inc: $53K across 1 grant, latest 2024The Pittsburgh Foundation → Special Olympics Pennsylvania: $42K across 3 grants, latest 2024The Chicago Community Trust → Dade Amateur Golf Association Inc: $40K across 2 grants, latest 2023Arrl Foundation Inc → Anchorage Amateur Radio Club Inc: $25K across 1 grant, latest 2022Louis W Horvath Foundation Inc → American Legion Baseball: $15K across 4 grants, latest 2025Amateur Athletic Union of the Us Inc → Amateur Athletic Union of Southern Pacific: $10K across 1 grant, latest 2020The Yasme Foundation → Ethiopian Amateur Radio Club: $6K across 2 grants, latest 2023North Carolina Amateur Sports Inc → Unc Wilmington: $6K across 3 grants, latest 2024Amateur Radio Digital Communications → Arrl Foundation: $500K across 1 grant, latest 2022Cape Cod Baseball League Inc → Bourne Athletic Assoc Dba Bourne Braves: $61K across 3 grants, latest 2024Oneamerica Foundation Inc → Diversity in Aquatics Inc: $40K across 1 grant, latest 2024New England Yankee Hockey → Vermont State Amateur Hockey Assoc: $37K across 3 grants, latest 2024The Pittsburgh Foundation → Josh Gibson Foundation: $35K across 1 grant, latest 2024Arrl Foundation Inc → All Things Amateur Radio Association: $25K across 1 grant, latest 2022Amateur Athletic Union of the Us Inc → Amateur Athletic Union of North Carolina: $10K across 1 grant, latest 2020Louis W Horvath Foundation Inc → Sheridan High School Booster Club: $8K across 3 grants, latest 2024The Yasme Foundation → Ethiopian Amateur Radio Society: $6K across 2 grants, latest 2024North Carolina Amateur Sports Inc → East Bladen High School Athletic Booster Club: $5K across 1 grant, latest 2024Quarter Century Wireless Association Inc → Orlando Amateur Radio Club: $4K across 2 grants, latest 2024Amateur Radio Digital Communications → Tucson Amateur Packet Radio Corporation: $422K across 2 grants, latest 2022Amateur Radio Digital Communications → Antarikchya Pratisthan Nepal (Space Foundation Nepal): $384K across 1 grant, latest 2023Amateur Radio Digital Communications → Deep Space Exploration Society: $300K across 1 grant, latest 2022Amateur Radio Digital Communications → Allina Health Foundation On Behalf of Courage Kenny Rehabilitation Institut: $293K across 2 grants, latest 2024Amateur Radio Digital Communications → Central Michigan Amateur Network: $251K across 1 grant, latest 2022Amateur Radio Digital Communications → Portland State University Foundation: $242K across 2 grants, latest 2023Amateur Radio Digital Communications → University of Leeds: $201K across 1 grant, latest 2024Amateur Radio Digital Communications → Healthcare Community Amateur Radio Club: $199K across 2 grants, latest 2022Amateur Radio Digital Communications → The University of Scranton: $196K across 1 grant, latest 2022Amateur Radio Digital Communications → Highline Amateur Radio Club: $183K across 1 grant, latest 2022Amateur Radio Digital Communications → Open Collective Europe (On Behalf of Multimode Digital Voice Modem (Mmdvm): $180K across 1 grant, latest 2024Amateur Radio Digital Communications → Pleasant Valley Amateur Radio Club: $154K across 1 grant, latest 2022Amateur Radio Digital Communications → Calnet Amateur Radio Group: $152K across 1 grant, latest 2023Amateur Radio Digital Communications → San Francisco Wireless Emergency Mesh Inc - Bay Area Mesh: $147K across 1 grant, latest 2022Amateur Radio Digital Communications → American Indian Science and Engineering Society: $144K across 2 grants, latest 2025Amateur Radio Digital Communications → Open Collective Europe: $125K across 2 grants, latest 2023Amateur Radio Digital Communications → Teachers in Space Inc: $110K across 1 grant, latest 2025Amateur Radio Digital Communications → York County Amateur Radio Society Club Inc: $100K across 1 grant, latest 2023Amateur Radio Digital Communications → Radio Amateur Satellite Corporation (Dba Amsat): $94K across 1 grant, latest 2022Amateur Radio Digital Communications → Fondation Open Collective Europe (On Behalf of the Radio Society of Sri Lan: $88K across 1 grant, latest 2025Amateur Radio Digital Communications → Radio Scouting Inc: $85K across 1 grant, latest 2023Amateur Radio Digital Communications → Boeing Employee's Amateur Radio Society: $84K across 1 grant, latest 2023Amateur Radio Digital Communications → Aircraft Carrier Hornet Foundation: $80K across 1 grant, latest 2024Amateur Radio Digital Communications → Csuci Amateur Radio Interest Group: $74K across 1 grant, latest 2023Amateur Radio Digital Communications → Radio Amateur Du-of Quebec Inc (On Behalf La Federation Des Clubs Radioamat: $74K across 1 grant, latest 2025Amateur Radio Digital Communications → Cascade Amateur Radio Society: $66K across 2 grants, latest 2024Amateur Radio Digital Communications → Military Heritage Museum: $61K across 1 grant, latest 2023Amateur Radio Digital Communications → Alberta Digital Radio Communications Society: $60K across 1 grant, latest 2025Cape Cod Baseball League Inc → Orleans Athletic Association Inc Dba Orlean Firebirds: $59K across 3 grants, latest 2024Amateur Radio Digital Communications: $7.0M on this topic. Open the funder.Amateur Radio Digital Communi…$7.0MThe Chicago Community Trust: $800K on this topic. Open the funder.The Chicago Community Trust$800KOneamerica Foundation Inc: $432K on this topic. Open the funder.Oneamerica Foundation Inc$432KCape Cod Baseball League Inc: $258K on this topic. Open the funder.Cape Cod Baseball League Inc$258KThe Pittsburgh Foundation: $255K on this topic. Open the funder.The Pittsburgh Foundation$255KQuarter Century Wireless Association Inc: $208K on this topic. Open the funder.Quarter Century Wireless Asso…$208KNew England Yankee Hockey: $148K on this topic. Open the funder.New England Yankee Hockey$148KArrl Foundation Inc: $75K on this topic. Open the funder.Arrl Foundation Inc$75KThe Yasme Foundation: $52K on this topic. Open the funder.The Yasme Foundation$52KLouis W Horvath Foundation Inc: $41K on this topic. Open the funder.Louis W Horvath Foundation Inc$41KNorth Carolina Amateur Sports Inc: $32K on this topic. Open the funder.North Carolina Amateur Sports…$32KAmateur Athletic Union of the Us Inc: $30K on this topic. Open the funder.Amateur Athletic Union of the…$30KInternet Archive: received $1.2M on this topicInternet Archive$1.2MDeutscher Amateur Radio Club (Darc) Ev: received $778K on this topicDeutscher Amateur Radio Club (D…$778KEvans Scholars Foundation: received $760K on this topicEvans Scholars Foundation$760KArrl Foundation: received $500K on this topicArrl Foundation$500KTucson Amateur Packet Radio Corporation: received $422K on this topicTucson Amateur Packet Radio Cor…$422KAntarikchya Pratisthan Nepal (Space Foundation Nepal): received $384K on this topicAntarikchya Pratisthan Nepal (S…$384KUnited Way of Central Indiana: received $327K on this topicUnited Way of Central Indiana$327KDeep Space Exploration Society: received $300K on this topicDeep Space Exploration Society$300KAllina Health Foundation On Behalf of Courage Kenny Rehabilitation Institut: received $293K on this topicAllina Health Foundation On Beh…$293KCentral Michigan Amateur Network: received $251K on this topicCentral Michigan Amateur Network$251KPortland State University Foundation: received $242K on this topicPortland State University Found…$242KUniversity of Leeds: received $201K on this topicUniversity of Leeds$201KHealthcare Community Amateur Radio Club: received $199K on this topicHealthcare Community Amateur Ra…$199KThe University of Scranton: received $196K on this topicThe University of Scranton$196KHighline Amateur Radio Club: received $183K on this topicHighline Amateur Radio Club$183KOpen Collective Europe (On Behalf of Multimode Digital Voice Modem (Mmdvm): received $180K on this topicOpen Collective Europe (On Beha…$180KThe First Tee of Pittsburgh: received $178K on this topicThe First Tee of Pittsburgh$178KPleasant Valley Amateur Radio Club: received $154K on this topicPleasant Valley Amateur Radio C…$154KCalnet Amateur Radio Group: received $152K on this topicCalnet Amateur Radio Group$152KFoundation for Amateur Radio Inc: received $151K on this topicFoundation for Amateur Radio Inc$151KSan Francisco Wireless Emergency Mesh Inc - Bay Area Mesh: received $147K on this topicSan Francisco Wireless Emergenc…$147KAmerican Indian Science and Engineering Society: received $144K on this topicAmerican Indian Science and Eng…$144KOpen Collective Europe: received $125K on this topicOpen Collective Europe$125KTeachers in Space Inc: received $110K on this topicTeachers in Space Inc$110KYork County Amateur Radio Society Club Inc: received $100K on this topicYork County Amateur Radio Socie…$100KRadio Amateur Satellite Corporation (Dba Amsat): received $94K on this topicRadio Amateur Satellite Corpora…$94KFondation Open Collective Europe (On Behalf of the Radio Society of Sri Lan: received $88K on this topicFondation Open Collective Europ…$88KRadio Scouting Inc: received $85K on this topicRadio Scouting Inc$85KBoeing Employee's Amateur Radio Society: received $84K on this topicBoeing Employee's Amateur Radio…$84KAircraft Carrier Hornet Foundation: received $80K on this topicAircraft Carrier Hornet Foundat…$80KCsuci Amateur Radio Interest Group: received $74K on this topicCsuci Amateur Radio Interest Gr…$74KRadio Amateur Du-of Quebec Inc (On Behalf La Federation Des Clubs Radioamat: received $74K on this topicRadio Amateur Du-of Quebec Inc…$74KFalmouth Baseball Club Inc Dba Falmouth Commodores: received $71K on this topicFalmouth Baseball Club Inc Dba…$71KHarwich Athletic Association Inc Dba Harwich Mariners: received $68K on this topicHarwich Athletic Association In…$68KCascade Amateur Radio Society: received $66K on this topicCascade Amateur Radio Society$66KHoward University Dept of Athletics: received $65K on this topicHoward University Dept of Athle…$65KMilitary Heritage Museum: received $61K on this topicMilitary Heritage Museum$61KBourne Athletic Assoc Dba Bourne Braves: received $61K on this topicBourne Athletic Assoc Dba Bourn…$61KAlberta Digital Radio Communications Society: received $60K on this topicAlberta Digital Radio Communica…$60KOrleans Athletic Association Inc Dba Orlean Firebirds: received $59K on this topicOrleans Athletic Association In…$59KNew Hampshire Amateur Hockey: received $56K on this topicNew Hampshire Amateur Hockey$56KMaine Amateur Hockey Association I: received $55K on this topicMaine Amateur Hockey Associatio…$55KDayton Amateur Radio Assn Inc: received $53K on this topicDayton Amateur Radio Assn Inc$53KSpecial Olympics Pennsylvania: received $42K on this topicSpecial Olympics Pennsylvania$42KDade Amateur Golf Association Inc: received $40K on this topicDade Amateur Golf Association I…$40KDiversity in Aquatics Inc: received $40K on this topicDiversity in Aquatics Inc$40KOttawa Amateur Radio Club Inc: received $39K on this topicOttawa Amateur Radio Club Inc$39KVermont State Amateur Hockey Assoc: received $37K on this topicVermont State Amateur Hockey As…$37KJosh Gibson Foundation: received $35K on this topicJosh Gibson Foundation$35KGloucester County Amateur Radio Club - W2mmd: received $25K on this topicGloucester County Amateur Radio…$25KAnchorage Amateur Radio Club Inc: received $25K on this topicAnchorage Amateur Radio Club Inc$25KAll Things Amateur Radio Association: received $25K on this topicAll Things Amateur Radio Associ…$25KBlack Girls Do Bikeplayers Philanthropy Fund: received $21K on this topicBlack Girls Do Bikeplayers Phil…$21KCowboy Joe Club: received $17K on this topicCowboy Joe Club$17KAmerican Legion Baseball: received $15K on this topicAmerican Legion Baseball$15KAmateur Athletic Union of Michigan: received $10K on this topicAmateur Athletic Union of Michi…$10KAmateur Athletic Union of Southern Pacific: received $10K on this topicAmateur Athletic Union of South…$10KAmateur Athletic Union of North Carolina: received $10K on this topicAmateur Athletic Union of North…$10KSheridan High School Booster Club: received $8K on this topicSheridan High School Booster Cl…$8KEthiopian Amateur Radio Club: received $6K on this topicEthiopian Amateur Radio Club$6KEthiopian Amateur Radio Society: received $6K on this topicEthiopian Amateur Radio Society$6KUnc Wilmington: received $6K on this topicUnc Wilmington$6KEast Bladen High School Athletic Booster Club: received $5K on this topicEast Bladen High School Athleti…$5KOrlando Amateur Radio Club: received $4K on this topicOrlando Amateur Radio Club$4K
12 funders, 64 recipients, grants matching “amateur” 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 20192025. 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 →