Harold Kl Castle Foundation
Kailua, Hawaii · EIN 996005445 · Private foundation
Harold Kl Castle Foundation is a private foundation based in Kailua, Hawaii. Its most recent IRS Form 990-PF reports $7.2M in grants paid and $169.3M in total assets. Bespoke Grants tracks 400 individual grants from this funder — $29.6M awarded across 2020–2024 — including its support for arts & culture. Below is its full funding profile.
What Harold Kl Castle Foundation funds
Harold Kl Castle Foundation's giving carries a documented focus on arts & culture, disability services, early childhood education, economic development, education, and related causes.
Populations it has supported include children, disabled, families, homeless population, indigenous, men boys.
Grant history
The largest grants Bespoke Grants has on record for Harold Kl Castle Foundation, by amount:
| Recipient | Location | Grant | Year |
|---|---|---|---|
| Hawaii Community Foundation (hcf) PARTNERING TO ADVANCE HAWAI'I'S MARINE 30X30 INITIATIVE PHASE I: BUILDING A POOLED FIELD OF INTEREST FUND [5046; PC] | Honolulu, HI | $700K | 2022 |
| Social Finance Inc PROPOSAL TO SERVE AS HAWAII RENEWABLE LEARNING FUND MANAGER [6086; PC] | Boston, CA | $550K | 2024 |
| University of Hawaii Foundation SOAR HIGHER - SUPPORT FOR WINDWARD OAHU SCHOOLS TO PARTICIPATE AS A GEAR UP 6-16 MODEL [5173; PC] | Honolulu, HI | $529K | 2024 |
| University of Hawaii Foundation SOAR HIGHER - SUPPORT FOR WINDWARD O'AHU SCHOOLS TO PARTICIPATE AS A GEAR UP 6-16 MODEL [5173; PC] | Honolulu, HI | $529K | 2022 |
| University of Hawaii Foundation SOAR HIGHER - SUPPORT FOR WINDWARD OAHU SCHOOLS TO PARTICIPATE AS A GEAR UP 6-16 MODEL [5173; PC] | Honolulu, HI | $529K | 2023 |
| Hawaii Community Foundation (hcf) SUPPORT FOR A SECOND ROUND OF CONTRIBUTIONS TO THE HOLOMUA POOLED FUND WHOSE GOAL IS TO IMPROVE MARINE RESOURCES MANAGEMENT IN HAWAI'I THROU | Honolulu, HI | $500K | 2023 |
| Hawaii Community Foundation (hcf) SUPPORT FOR A SECOND ROUND OF CONTRIBUTIONS TO THE HOLOMUA POOLED FUND WHOSE GOAL IS TO IMPROVE MARINE RESOURCES MANAGEMENT IN HAWAII THROUG | Honolulu, HI | $500K | 2024 |
| Kuaaina Ulu Auamo (kua) TO SUPPORT AND STRENGTHEN THIS CRITICALLY IMPORTANT BACKBONE ORGANIZATION AND ITS THREE COMMUNITY-DRIVEN NETWORKS FOR OCEAN MANAGEMENT IN HA | Kaneohe, HI | $500K | 2024 |
| University of Hawaii Foundation TO ENSURE EACH DOE DISTRICT HAS A STRONG REGIONAL INTERMEDIARY PARTNER FOR WORK-BASED LEARNING AND TO BUILD A NEW DATA AND ACCOUNTABILITY SY | Honolulu, HI | $499K | 2023 |
| Kuaaina Ulu Auamo (kua) TO SUPPORT AND STRENGTHEN THIS CRITICALLY IMPORTANT BACKBONE ORGANIZATION AND ITS THREE COMMUNITY-DRIVEN NETWORKS FOR OCEAN MANAGEMENT IN HA | Kaneohe, HI | $403K | 2022 |
| Hawaii Community Foundation (hcf) PILINA FUND 2.0 [5618; PC] | Honolulu, HI | $400K | 2022 |
| The Nature Conservancy of Hawaii E OLA KE KAI, E OLA KAKOU (AS THE OCEAN THRIVES, SO DO WE): 3-YEAR CORE SUPPORT TO TNC-HAWAI'I MARINE PROGRAM (2020-2022) FOCUSING ON COMMUN | Honolulu, HI | $400K | 2022 |
| Hawaii Community Foundation (hcf) PILINA FUND 2.0 [5618; PC] | Honolulu, HI | $400K | 2024 |
| The Nature Conservancy of Hawaii E OLA KE KAI, E OLA KAKOU (AS THE OCEAN THRIVES, SO DO WE): 3-YEAR CORE SUPPORT TO TNC-HAWAII MARINE PROGRAM (2020-2022) FOCUSING ON COMMUNI | Honolulu, HI | $400K | 2020 |
| Kuaaina Ulu Auamo (kua) I KU HULUHULU (PULL/HAUL TOGETHER WITH ALL YOUR MIGHT): CORE SUPPORT TO CONVENE AND PROVIDE TECHNICAL SUPPORT FOR THREE NETWORKS TOTALING 74 | Kaneohe, HI | $364K | 2020 |
Harold Kl Castle Foundation giving by year
Total grants Bespoke Grants has indexed for each filing year:
How to apply for funding from Harold Kl Castle Foundation
Harold Kl Castle Foundation's public IRS filing does not spell out a formal application process. Foundations of this size often give primarily to organizations they already know, so a concise letter of inquiry or a warm introduction is usually the best first contact — not a full proposal. You can review the foundation directly at castlefoundation.org.
Is Harold Kl Castle Foundation the right funder for your nonprofit?
This page shows what Harold Kl Castle Foundation has funded. Bespoke Grants tells you whether it fits your mission — and finds every other foundation that does. Free, no credit card.
Match my nonprofit to funders →Frequently asked questions about Harold Kl Castle Foundation
- Does Harold Kl Castle Foundation accept grant applications?
- Harold Kl Castle Foundation's public filing does not specify an application process. A brief letter of inquiry or a warm introduction is usually the best first step with a private foundation of this size.
- What does Harold Kl Castle Foundation fund?
- Harold Kl Castle Foundation's grants focus on arts & culture. Recent recipients include Hawaii Community Foundation (hcf), Social Finance Inc, University of Hawaii Foundation. Its full grant history is listed above.
- How much does Harold Kl Castle Foundation give in grants?
- Harold Kl Castle Foundation reported $7.2M in grants in its most recent IRS filing (FY2020). Across all years in our data it has awarded $29.6M over 400 grants.
- Where is Harold Kl Castle Foundation located?
- Harold Kl Castle Foundation is based in Kailua, Hawaii. Its IRS employer identification number (EIN) is 996005445.
- How can I find foundations similar to Harold Kl Castle Foundation?
- Bespoke Grants matches your nonprofit against 225,000+ foundations like Harold Kl Castle Foundation, ranking each by how well it fits your mission, location, and budget — with the reasoning shown. It is free to search.
Find more funders like Harold Kl Castle Foundation
Foundations similar to Harold Kl Castle Foundation
Other Hawaii grantmakers with overlapping priorities: