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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 “oahu”

Where the money went

1.0×
The Harry and Jeanette Weinberg → Aloha United Way: $1.2M across 3 grants, latest 2024Harold Kl Castle Foundation → University of Hawaii Foundation: $1.2M across 3 grants, latest 2024Joseph and Vera Zilber Family Foundation Inc → YWCA of Oahu: $169K across 5 grants, latest 2023Anzalone Charitable Trust Main → Oahu Spca: $125K across 5 grants, latest 2025Central Pacific Bank Foundation → YWCA Oahu: $116K across 5 grants, latest 2024The Kosasa Foundation → YMCA of Honolulu: $105K across 1 grant, latest 2022Hawaii Dental Service → Oahu Economic Development Board: $100K across 2 grants, latest 2022James & Abigail Campbell Family → University of Hawaii Foundation: $98K across 2 grants, latest 2024First Hawaiian Bank Foundation → Hawaiian Humane Society: $75K across 3 grants, latest 2024Aloha United Way Inc → Oahu Society for the Prevention of Cruelty of Animals: $75K across 2 grants, latest 2023Tradewind Group Foundation → Oahu Economic Development Board: $65K across 4 grants, latest 2025Rl Huntington Hawaii Foundation → East Oahu Young Life: $35K across 3 grants, latest 2024The Harry and Jeanette Weinberg → Self-Help Housing Corporation of Hawaii: $500K across 2 grants, latest 2024The Kosasa Foundation → Hawaii Foodbank: $100K across 1 grant, latest 2022Harold Kl Castle Foundation → Hawaiian Islands Land Trust (Hilt): $100K across 1 grant, latest 2024Joseph and Vera Zilber Family Foundation Inc → YWCA of Oahu: $62K across 2 grants, latest 2024Central Pacific Bank Foundation → Hawaiian Humane Society: $50K across 2 grants, latest 2024Aloha United Way Inc → YWCA of Oahu: $48K across 3 grants, latest 2024Tradewind Group Foundation → YWCA of Oahu: $34K across 4 grants, latest 2025Hawaii Dental Service → March of Dimes (March for Babies Oahu): $30K across 3 grants, latest 2024First Hawaiian Bank Foundation → Hawaii Nature Center: $30K across 1 grant, latest 2024James & Abigail Campbell Family → The Pantry: $25K across 1 grant, latest 2024Rl Huntington Hawaii Foundation → Central Oahu Young Life: $15K across 1 grant, latest 2024The Harry and Jeanette Weinberg → The Arc in Hawaii: $225K across 1 grant, latest 2022Harold Kl Castle Foundation → The Pacific American Foundation (Paf): $100K across 2 grants, latest 2024The Kosasa Foundation → Oahu Spca: $75K across 2 grants, latest 2021Joseph and Vera Zilber Family Foundation Inc → Residential Youth Services & Empowerment: $50K across 2 grants, latest 2022Aloha United Way Inc → Oahu Spca: $36K across 1 grant, latest 2024First Hawaiian Bank Foundation → Feeding Hawaii Together: $25K across 1 grant, latest 2022Hawaii Dental Service → YWCA of Oahu: $25K across 1 grant, latest 2023James & Abigail Campbell Family → American Heart Association Inc: $20K across 1 grant, latest 2024Central Pacific Bank Foundation → Oahu Choral Society: $15K across 1 grant, latest 2022Rl Huntington Hawaii Foundation → Young Life Oahu: $12K across 1 grant, latest 2022Tradewind Group Foundation → University of Hawaii Foundation - West Oahu Community Bank: $10K across 1 grant, latest 2024The Harry and Jeanette Weinberg → Searider Productions Foundation: $140K across 1 grant, latest 2022The Harry and Jeanette Weinberg → Kauluakalana: $100K across 1 grant, latest 2024Harold Kl Castle Foundation → Partners in Care - Oahu's Continuum of Care: $75K across 1 grant, latest 2022The Kosasa Foundation → Malama Pupukea-Waimea: $57K across 1 grant, latest 2023The Harry and Jeanette Weinberg → Partners in Care - Oahu's Continuum of Care: $55K across 5 grants, latest 2024The Kosasa Foundation → Protect & Preserve Hawaii Inc: $50K across 1 grant, latest 2023Harold Kl Castle Foundation → Collaborative Support Services: $50K across 1 grant, latest 2024The Harry and Jeanette Weinberg → Housing Solutions Incorporated: $50K across 1 grant, latest 2023The Kosasa Foundation → Malama Learning Center: $50K across 1 grant, latest 2023Harold Kl Castle Foundation → Vibrant Hawaii: $40K across 1 grant, latest 2024The Harry and Jeanette Weinberg → Hawaii Intergenerational Network: $40K across 1 grant, latest 2022Harold Kl Castle Foundation → River of Life Mission: $40K across 1 grant, latest 2024The Harry and Jeanette Weinberg → Dynamic Community Solutions: $35K across 2 grants, latest 2024Aloha United Way Inc → Oahu Economic Development Board: $30K across 2 grants, latest 2023Aloha United Way Inc → Oahu Jewish Ohana: $30K across 1 grant, latest 2022Harold Kl Castle Foundation → Oahu Resource Conservation and Development Council: $25K across 1 grant, latest 2024The Harry and Jeanette Weinberg → YWCA of Oahu: $25K across 1 grant, latest 2024The Harry and Jeanette Weinberg → Aloha Harvest: $20K across 1 grant, latest 2022The Harry and Jeanette Weinberg → Better Block Hawaii: $20K across 1 grant, latest 2022The Harry and Jeanette Weinberg → Malama Honua Public Charter School Foundation: $20K across 1 grant, latest 2022The Harry and Jeanette Weinberg → Hui Aloha 808: $20K across 1 grant, latest 2022The Harry and Jeanette Weinberg → Hui Mahiai Aina: $20K across 1 grant, latest 2022Harold Kl Castle Foundation → Nurture Cultivate Inc: $20K across 2 grants, latest 2024Aloha United Way Inc → Friends of the Childrens Justice Center of Oahu: $18K across 2 grants, latest 2024James & Abigail Campbell Family → Best Buddies International Inc: $13K across 1 grant, latest 2024The Harry and Jeanette Weinberg → Partners in Development Foundation: $12K across 1 grant, latest 2022Harold Kl Castle Foundation → Windward Dog Park Hui: $10K across 1 grant, latest 2023The Harry and Jeanette Weinberg → The Aspen Institute Inc: $10K across 1 grant, latest 2022The Harry and Jeanette Weinberg → Elepaio Social Services: $10K across 1 grant, latest 2024James & Abigail Campbell Family → Girl Scouts of Hawai'i: $10K across 1 grant, latest 2024The Harry and Jeanette Weinberg: $2.5M on this topic. Open the funder.The Harry and Jeanette Weinbe…$2.5MHarold Kl Castle Foundation: $1.6M on this topic. Open the funder.Harold Kl Castle Foundation$1.6MThe Kosasa Foundation: $437K on this topic. Open the funder.The Kosasa Foundation$437KJoseph and Vera Zilber Family Foundation Inc: $281K on this topic. Open the funder.Joseph and Vera Zilber Family…$281KAloha United Way Inc: $237K on this topic. Open the funder.Aloha United Way Inc$237KCentral Pacific Bank Foundation: $181K on this topic. Open the funder.Central Pacific Bank Foundati…$181KJames & Abigail Campbell Family: $166K on this topic. Open the funder.James & Abigail Campbell Fami…$166KHawaii Dental Service: $155K on this topic. Open the funder.Hawaii Dental Service$155KFirst Hawaiian Bank Foundation: $130K on this topic. Open the funder.First Hawaiian Bank Foundation$130KAnzalone Charitable Trust Main: $125K on this topic. Open the funder.Anzalone Charitable Trust Main$125KTradewind Group Foundation: $109K on this topic. Open the funder.Tradewind Group Foundation$109KRl Huntington Hawaii Foundation: $62K on this topic. Open the funder.Rl Huntington Hawaii Foundati…$62KUniversity of Hawaii Foundation: received $1.3M on this topicUniversity of Hawaii Foundation$1.3MAloha United Way: received $1.2M on this topicAloha United Way$1.2MSelf-Help Housing Corporation of Hawaii: received $500K on this topicSelf-Help Housing Corporation o…$500KOahu Spca: received $235K on this topicOahu Spca$235KThe Arc in Hawaii: received $225K on this topicThe Arc in Hawaii$225KOahu Economic Development Board: received $195K on this topicOahu Economic Development Board$195KYWCA of Oahu: received $193K on this topicYWCA of Oahu$193KYWCA of Oahu: received $169K on this topicYWCA of Oahu$169KSearider Productions Foundation: received $140K on this topicSearider Productions Foundation$140KPartners in Care - Oahu's Continuum of Care: received $130K on this topicPartners in Care - Oahu's Conti…$130KYWCA Oahu: received $116K on this topicYWCA Oahu$116KYMCA of Honolulu: received $105K on this topicYMCA of Honolulu$105KHawaii Foodbank: received $100K on this topicHawaii Foodbank$100KHawaiian Islands Land Trust (Hilt): received $100K on this topicHawaiian Islands Land Trust (Hi…$100KThe Pacific American Foundation (Paf): received $100K on this topicThe Pacific American Foundation…$100KKauluakalana: received $100K on this topicKauluakalana$100KHawaiian Humane Society: received $75K on this topicHawaiian Humane Society$75KOahu Society for the Prevention of Cruelty of Animals: received $75K on this topicOahu Society for the Prevention…$75KMalama Pupukea-Waimea: received $57K on this topicMalama Pupukea-Waimea$57KHawaiian Humane Society: received $50K on this topicHawaiian Humane Society$50KResidential Youth Services & Empowerment: received $50K on this topicResidential Youth Services & Em…$50KProtect & Preserve Hawaii Inc: received $50K on this topicProtect & Preserve Hawaii Inc$50KCollaborative Support Services: received $50K on this topicCollaborative Support Services$50KHousing Solutions Incorporated: received $50K on this topicHousing Solutions Incorporated$50KMalama Learning Center: received $50K on this topicMalama Learning Center$50KVibrant Hawaii: received $40K on this topicVibrant Hawaii$40KHawaii Intergenerational Network: received $40K on this topicHawaii Intergenerational Network$40KRiver of Life Mission: received $40K on this topicRiver of Life Mission$40KEast Oahu Young Life: received $35K on this topicEast Oahu Young Life$35KDynamic Community Solutions: received $35K on this topicDynamic Community Solutions$35KMarch of Dimes (March for Babies Oahu): received $30K on this topicMarch of Dimes (March for Babie…$30KHawaii Nature Center: received $30K on this topicHawaii Nature Center$30KOahu Jewish Ohana: received $30K on this topicOahu Jewish Ohana$30KThe Pantry: received $25K on this topicThe Pantry$25KFeeding Hawaii Together: received $25K on this topicFeeding Hawaii Together$25KOahu Resource Conservation and Development Council: received $25K on this topicOahu Resource Conservation and…$25KAmerican Heart Association Inc: received $20K on this topicAmerican Heart Association Inc$20KAloha Harvest: received $20K on this topicAloha Harvest$20KBetter Block Hawaii: received $20K on this topicBetter Block Hawaii$20KMalama Honua Public Charter School Foundation: received $20K on this topicMalama Honua Public Charter Sch…$20KHui Aloha 808: received $20K on this topicHui Aloha 808$20KHui Mahiai Aina: received $20K on this topicHui Mahiai Aina$20KNurture Cultivate Inc: received $20K on this topicNurture Cultivate Inc$20KFriends of the Childrens Justice Center of Oahu: received $18K on this topicFriends of the Childrens Justic…$18KCentral Oahu Young Life: received $15K on this topicCentral Oahu Young Life$15KOahu Choral Society: received $15K on this topicOahu Choral Society$15KBest Buddies International Inc: received $13K on this topicBest Buddies International Inc$13KYoung Life Oahu: received $12K on this topicYoung Life Oahu$12KPartners in Development Foundation: received $12K on this topicPartners in Development Foundat…$12KUniversity of Hawaii Foundation - West Oahu Community Bank: received $10K on this topicUniversity of Hawaii Foundation…$10KWindward Dog Park Hui: received $10K on this topicWindward Dog Park Hui$10KThe Aspen Institute Inc: received $10K on this topicThe Aspen Institute Inc$10KElepaio Social Services: received $10K on this topicElepaio Social Services$10KGirl Scouts of Hawai'i: received $10K on this topicGirl Scouts of Hawai'i$10K
12 funders, 54 recipients, grants matching “oahu” 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 →