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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.

10 funders with a record of paying for “deworming”

Where the money went

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The Clear Fund → Evidence Action: $16M across 2 grants, latest 2023Good Ventures Foundation → The End Fund Inc: $500K across 1 grant, latest 2021Founders Pledge Inc → University of Washington Foundation: $112K across 1 grant, latest 2022Centre for Effective Altruism USA Inc → Oxfendazole Development Group: $101K across 1 grant, latest 2021The New Opportunities Foundation → Unlimited Health (Sci Foundation): $40K across 1 grant, latest 2024Florence and Laurence Spungen Family → Vitamin Angels Alliance: $20K across 2 grants, latest 2024The William D Rhodes Foundation → Evidence Action - Deworm the World: $15K across 2 grants, latest 2023Merlin Charitable Foundation → Evidence Action: $8K across 3 grants, latest 2024Thornton S Jr and Katrina D → Yolo County Society for Prevention of Cruelty to Animals: $7K across 1 grant, latest 2024American Woodmark Foundation Inc → Toccoa - Stephens County Humane Shelter Inc: $1K across 1 grant, latest 2023The Clear Fund → Sightsavers: $5.7M across 2 grants, latest 2023Centre for Effective Altruism USA Inc → Evidence Action: $52K across 1 grant, latest 2021Founders Pledge Inc → Evidence Action Inc: $50K across 1 grant, latest 2023The New Opportunities Foundation → Sci Foundation - Schististosomiasis Control Initiative Edingburgh House: $20K across 1 grant, latest 2022The Clear Fund → The End Fund: $61K across 1 grant, latest 2022Centre for Effective Altruism USA Inc → Sightsavers Inc: $12K across 1 grant, latest 2021Centre for Effective Altruism USA Inc → The End Fund: $8K across 1 grant, latest 2021The Clear Fund: $22M on this topic. Open the funder.The Clear Fund$22MGood Ventures Foundation: $500K on this topic. Open the funder.Good Ventures Foundation$500KCentre for Effective Altruism USA Inc: $172K on this topic. Open the funder.Centre for Effective Altruism…$172KFounders Pledge Inc: $162K on this topic. Open the funder.Founders Pledge Inc$162KThe New Opportunities Foundation: $60K on this topic. Open the funder.The New Opportunities Foundat…$60KFlorence and Laurence Spungen Family: $20K on this topic. Open the funder.Florence and Laurence Spungen…$20KThe William D Rhodes Foundation: $15K on this topic. Open the funder.The William D Rhodes Foundati…$15KMerlin Charitable Foundation: $8K on this topic. Open the funder.Merlin Charitable Foundation$8KThornton S Jr and Katrina D: $7K on this topic. Open the funder.Thornton S Jr and Katrina D$7KAmerican Woodmark Foundation Inc: $1K on this topic. Open the funder.American Woodmark Foundation…$1KEvidence Action: received $16M on this topicEvidence Action$16MSightsavers: received $5.7M on this topicSightsavers$5.7MThe End Fund Inc: received $500K on this topicThe End Fund Inc$500KUniversity of Washington Foundation: received $112K on this topicUniversity of Washington Founda…$112KOxfendazole Development Group: received $101K on this topicOxfendazole Development Group$101KThe End Fund: received $69K on this topicThe End Fund$69KEvidence Action Inc: received $50K on this topicEvidence Action Inc$50KUnlimited Health (Sci Foundation): received $40K on this topicUnlimited Health (Sci Foundatio…$40KVitamin Angels Alliance: received $20K on this topicVitamin Angels Alliance$20KSci Foundation - Schististosomiasis Control Initiative Edingburgh House: received $20K on this topicSci Foundation - Schististosomi…$20KEvidence Action - Deworm the World: received $15K on this topicEvidence Action - Deworm the Wo…$15KSightsavers Inc: received $12K on this topicSightsavers Inc$12KYolo County Society for Prevention of Cruelty to Animals: received $7K on this topicYolo County Society for Prevent…$7KToccoa - Stephens County Humane Shelter Inc: received $1K on this topicToccoa - Stephens County Humane…$1K
10 funders, 14 recipients, grants matching “deworming” 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 →