Funding search · EIN 996005445 · Kailua, HI

Harold Kl Castle Foundation

$22.0M
in grants paid: 302
grants: 154
recipients: 2022–2024
filing years

Recent grants

The 100 largest recent grants from this foundation’s filings, newest year first.

$550,000
Social Finance · Boston, CA · 2024
Proposal to serve as hawaii renewable learning fund manager [6086; pc]
$529,240
University of Hawaii Foundation · Honolulu, HI · 2024
Soar higher - support for windward oahu schools to participate as a gear up 6-16 model [5173; pc]
$500,000
Kuaaina Ulu Auamo (Kua) · Kaneohe, HI · 2024
To support and strengthen this critically important backbone organization and its three community-driven networks for ocean management in hawaii. [5598; pc]
$500,000
Hawaii Community Foundation (Hcf) · Honolulu, HI · 2024
Support for a second round of contributions to the holomua pooled fund whose goal is to improve marine resources management in hawaii through a suite of efforts built on four pillars: place-based planning, pono practice…
$400,000
Hawaii Community Foundation (Hcf) · Honolulu, HI · 2024
Pilina fund 2.0 [5618; pc]
$280,000
The Nature Conservancy of Hawaii · Honolulu, HI · 2024
Advancing community-based marine management to reach 30x30 goals [5660; pc]
$214,286
University of Hawaii Foundation · Honolulu, HI · 2024
To extend windward community college's groundbreaking hoolei scholarship that ensures all public school graduates in the koolau region can afford to attend community college [6140; pc]
$150,000
Hawaii Hospital Education and Research Foundation (Hherf) · Honolulu, HI · 2024
To retrofit doe classrooms for healthcare pathways in partnership with hawaii 3r's, g70 and hawaii pacific health [6363; pc]
$150,000
University of Hawaii Foundation · Honolulu, HI · 2024
Hawaii p-20 core support 2022-2025 [5465; pc]
$150,000
Windward School District · Kaneohe, HI · 2024
To internally drive windward doe schools towards aina aloha mindset achievement through teacher professional development (pd) days and closer engagement between schools and aina-based education organizations. [6371; gov]
$145,000
Purple Maia · Aiea, HI · 2024
For the expansion of halau hekili, a middle college high school on the campus of windward community college. [6277; pc]
$132,715
Hawaii Conservation Alliance Foundation · Honolulu, HI · 2024
For the next phase of the ahupuaa accelerator, a program to expand watershed-wide community management that has expanded to 46 partners statewide. [6153; pc]
$120,000
Resources Legacy Fund · Sacramento, CA · 2024
To help advance the holomua initiative and the care for aina now coalition (formerly green fee) environmental capital formation work [6125; pc]
$115,000
The American Ai Forum Aka Ai Education Project · San Francisco, CA · 2024
To deliver professional development that helps hawaii public school teachers better understand artificial intelligence (ai) and how to responsibly incorporate ai literacy into their curriculum. [6286; pc]
$103,163
College Summit Inc Dba Peerforward · Washington, DC · 2024
To scale a promising peer counseling model to four additional high schools. [6267; pc]
$100,000
C&C of Honolulu Office of Climate Change Sustainability and Resiliency · Honolulu, HI · 2024
To help the honolulu city & county optimize its climate adaptation work aligned with the foundation's new climate strategy [5860; gov]
$100,000
New Teacher Center · Santa Cruz, CA · 2024
To work alongside the hawaii department of education in building the support and resources that enable complex area leaders to bring effective mathematics coaching to their school communities [6372; pc]
$100,000
Hawaiian Islands Land Trust (Hilt) · Honolulu, HI · 2024
To continue to work in close partnership with the trust for public lands to secure priority lands for community use and aina aloha mindset development in windward oahu. [6259; pc]
$95,000
Conservation International Foundation · Honolulu, HI · 2024
Puulau project: a two-year effort to combine additional knowledge bases from fishers and community with wester-science based monitoring data to improve participation and decision making for the holomua initiative. [5588…
$75,000
Koolau Foundation · Kaneohe, HI · 2024
Catalyst funding to develop the haiku valley cultural preserve [5907; pc]
$75,000
The Pacific American Foundation (Paf) · Kaneohe, HI · 2024
For the launch of an esports development program in windward oahu schools [6127; pc]
$75,000
Kualoa-Heeia Ecumenical Youth Project (Key) · Kaneohe, HI · 2024
To bolster response to the little fire ant in koolauloa and koolaupoko through grassroots community education, training, monitoring, and response [6133; pc]
$70,000
College Summit Inc Dba Peerforward · Washington, DC · 2024
Peers leading peers through higher education [5516; pc]
$67,500
Public Schools Hawaii Foundation · Honolulu, HI · 2024
To launch a new effort that combines human and artificial intelligence to expand student support by offering more personalized navigational guidance and improving academic performance through targeted interventions. [62…
$67,500
50can · Washington, DC · 2024
Core organizational support for hawaiikidscan, an education advocacy organization committed to ensure that hawaii has an excellent and equitable education system [5898; pc]
$60,000
Hawaii Chamber of Commerce Foundation · Honolulu, HI · 2024
To support employer collaboratives that help ensure students in hawaii are on clear pathways to high skill, high wage, in-demand careers and that help hawaii businesses have a highly skilled, local talent pipeline [6350…
$60,000
Center for Tomorrow'S Leaders · Honolulu, HI · 2024
To strengthen the persuasive communication and writing of the roughly 300 high school students served each year [6368; pc]
$60,000
Hawaii Alliance of Nonprofit Organizations · Honolulu, HI · 2024
To help nonprofits engage in policy, work with data to develop clearer outcomes, and develop stronger revenue streams [6378; pc]
$55,340
Hawaii Workforce Pipeline · Kailua, HI · 2024
To forge stronger connections between windward employers and public school students in the region. [6282; pc]
$50,000
Wastewater Alternatives and Innovations · Honolulu, HI · 2024
To lead state and non-profit partners in improving the way we manage water quality in hawaii as part of the holomua initiative [5854; pc]
$50,000
Manoa Heritage Center · Honolulu, HI · 2024
Sam cooke endowed fund [4463; pc]
$50,000
Hui Malama O Ke Kai Foundation · Waimanalo, HI · 2024
E hoakoakoa: a community & educational space [5166; pc]
$50,000
Hawaii Chamber of Commerce Foundation · Honolulu, HI · 2024
Unsolicited challenge grant to hawaii chamber of commerce foundation to support business relief fund to help businesses affected by the maui wildfires [5953; pc]
$50,000
Collaborative Support Services · Honolulu, HI · 2024
Building a community-based early childhood continuum in the waimnalo community of oahu [5605; pc]
$50,000
Hawaii Community Foundation (Hcf) · Honolulu, HI · 2024
Support to ensure appropriate administration of the maui strong fund's current and expected grant expenditures totaling $192.6 million in a way that optimizes impact and transparency in the four phases of disaster, alig…
$50,000
The Nature Conservancy of Hawaii · Honolulu, HI · 2024
To continue their decades-long work with communities and the state on maui and hawaii island, as well as initiating new work on kauai [6329; pc]
$50,000
The Coral Reef Alliance · San Francisco, CA · 2024
To work with a coalition of partners to catalyze cesspool conversions at a meaningful scale sufficient to meet the states 2050 goal for 100% conversion. [6122; pc]
$50,000
Collaborative Support Services · Honolulu, HI · 2024
General operating support for the commit to keiki initiative to educate candidates and elected officials about the importance of investing in early childhood development [6377; pc]
$50,000
Leadership Instituue Hawaii Department of Education · Aiea, HI · 2024
Laying the foundation for middle level education magic:strengthening public middle schools in hawaii [5920; gov]
$50,000
Risehi Foundation · Kailua, HI · 2024
To support middle school youth in their development and career exploration. [6278; pc]
$50,000
Hawaii Executive Collaborative · Honolulu, HI · 2024
Support for the rediscovering hawaii's soul initiative to create spaces where leaders from all sectors could have candid, difficult discussions to work together to take action that will create a better future for hawaii…
$49,335
University of Hawaii Foundation · Honolulu, HI · 2024
Develop a malama aina plan for moku o loe that grounds it in its cultural heritage and guides it through the changing climate ahead [5586; pc]
$46,450
University of Hawaii Foundation · Honolulu, HI · 2024
To ensure each doe district has a strong regional intermediary partner for work-based learning and to build a new data and accountability system around the new statewide education attainment goal adopted by the hawaii p…
$40,000
University of Hawaii Foundation · Honolulu, HI · 2024
Honolulu community college (honcc) summer cte academy (2024, 2025) [6021; pc]
$40,000
Hawaii Electricians Training Fund · Honolulu, HI · 2024
Interim credential pre-apprenticeship program & recruitment expansion [6065; nc]
$40,000
Hi Fusioned (Isis Hawaii) · Honolulu, HI · 2024
To move key elements of coding education and career pipelines forward, including teacher training and career exposure/mentorship, specifically targeting elementary and middle schools [5744; pc]
$40,000
River of Life Mission · Honolulu, HI · 2024
Support to strengthen and expand river of life's new distributed hub model of serving windward oahu's homeless population to transition them off the streets using a systemic approach, trained volunteers, paid profession…
$40,000
Project Vision Hawaii · Honolulu, HI · 2024
To provide free hearing screenings for youth as a complement to project vision hawaii's already successful vision screening program, support the transition from private funding to public reimbursement for the project, a…
$40,000
Vibrant Hawaii · Hilo, HI · 2024
To develop a network of resilience hubs across windward oahu [6275: pc]
$37,500
Hui O Ko'Olaupoko · Kailua, HI · 2024
To increase coordination, response, and community involvement to fight the invasive species little fire ant in koolaupoko, with a focus on kailua and waimanalo. [6276; pc]
$31,500
Malama Learning Center Corp · Honolulu, HI · 2024
To produce another eight segments for local popular cable show outside hawaii that humanizes dlnr and socializes the intentions and actions of the holomua initiative [6367;pc]
$30,000
Hawaii Department of Education Ocid-Extended Learning Branch · Honolulu, HI · 2024
Support for hawaii department of education complex area teams to coordinate student-led student transition activities to and from middle school [6347; gov]
$25,000
Residential Youth Services & Empowerment · Kailua, HI · 2024
To support their drop-in shelter and services for youth ages 14-24 [5637; pc]
$25,000
Hawaii Afterschool Alliance · Honolulu, HI · 2024
To support a developmental evaluation of the community schools model in twelve participating public schools [5870; pc]
$25,000
College Promise · Washington, DC · 2024
To review and provide feedback on the hawaii promise initiative [6252; pc]
$25,000
Hawaii Executive Collaborative · Honolulu, HI · 2024
Support of 2024 hawaii executive conference [6385; pc]
$25,000
Hawaii Local2030 Hub · Honolulu, HI · 2024
To allow hawaii green growth to continue to populate the state's 2030 sustainability goals dashboard and to spur action to achieve these goals [6137; pc]
$25,000
University of Hawaii Foundation · Honolulu, HI · 2024
Core operating support that allows the uh economic research organization to more effectively engage with decisionmakers on important policy decisions facing our community [5847; pc]
$25,000
Hawaii Workforce Funders Collaborative · Kapaau, HI · 2024
For the hawaii workforce funders collaborative (hwfc) to cover membership dues that support the operative budget of this new organization that supports effective workforce development across the state of hawaii [6263;pc]
$25,000
Paepae O Heeia · Kaneohe, HI · 2024
Serving as fiscal sponsor for koolau aina aloha, to support their collective impact goals and specifically support the second phase of their aina aloha mindset competency pilot in close coordination with windward doe an…
$25,000
Kanu Hawaii · Honolulu, HI · 2024
Pledge to our keiki: a tie-off grant to help kanu hawaii build on the pledge to our keiki platform to cement its department of education collaboration, strengthen its engagement with corporate sponsors, and grow service…
$25,000
Khm International · Kaunakakai, HI · 2024
Malama e lua loko i'a: support for ka honua momona to restore their two adjacent fishponds on moloka'i with priority on the makaha of ali'i fishpond [5667;pc]
$25,000
The Pacific American Foundation (Paf) · Kaneohe, HI · 2024
To support the kilo kai program, providing ocean-related stem pathways for young people attending public high schools in the koolau region of oahu. [6326; pc]
$25,000
Malama Maunalua · Honolulu, HI · 2024
To help advance the holomua initiative by better aligning pro-fishing perspectives with those of government agencies, community groups, and environmental organizations. [6126; pc]
$25,000
Oahu Resource Conservation and Development Council · Kunia, HI · 2024
To support strategic and sustainability planning for pop-ups labs for steam (puls) [6095; pc]
$25,000
Sustainable Coastlines Hawaii · Honolulu, HI · 2024
To help establish a "solutions center" in kahuku as a center for ocean plastics education and recycling and an aina-based education site [6067; pc]
$23,740
University of Hawaii Foundation · Honolulu, HI · 2024
Support to increase retention of students at windward community college and strengthen the relationships between students and faculty, along with strengthening the relationships between instructional faculty and counsel…
$20,000
University of Hawaii Foundation · Honolulu, HI · 2024
Own your own future initiative: kupu o ke koolau - kaikuaana/kaikaina mentorship program [5811; pc]
$20,000
Iolani School Ka'I Program · Honolulu, HI · 2024
Own your own future initiative: 'iolani school ka'i program: family engagement & vocational learning opportunities [5736; pc]
$20,000
Boys & Girls Club of Hawaii · Honolulu, HI · 2024
Own your own future initiative: whats next initiative parent engagement [5728; pc]
$20,000
Healthy Climate Communities · Kailua, HI · 2024
To continue efforts to restore hamakua marsh with native flora so that native waterfowl use of the area increases. Funds will help the organization grow programmatic offerings, volunteer and donor bases, and school part…
$17,932
James B Castle High School · Kaneohe, HI · 2024
Own your own future initiative: differentiating the chs work-based learning continuum to meet the aspirations of all students [5734; gov]
$15,000
Kealakehe High School · Kailua Kona, HI · 2024
Support for post-high student transitions and stronger senior capstone projects [6475; gov]
$15,000
Molokai High and Intermediate School · Hoolehua, HI · 2024
Support for post-high student transitions [6448; gov]
$15,000
Seeqs Foundation · Honolulu, HI · 2024
A one-time grant in support of seeqs public charter school to establish the "seeqs sharing hub" as a center of professional development and community connection. [6406;pc]
$15,000
Kapolei High School · Kapolei, HI · 2024
Support for post-high student transitions - huakai pono: guiding kapolei's youth toward their future [6454; gov]
$15,000
Kailua High School · Kailua, HI · 2024
Support for post-high student transitions [6451; gov]
$15,000
Hilo High School · Hilo, HI · 2024
Support for post-high student transitions [6447; gov]
$15,000
Waikea High School · Hilo, HI · 2024
Support for post-high student transitions for waiakea graduates [6465; gov]
$12,500
University of Hawaii Foundation · Honolulu, HI · 2024
Investing in teachers, honoring student voices: the hawaii writing project young writers camp [pc; 6243]
$10,000
Hawaii Community Foundation (Hcf) · Honolulu, HI · 2024
To honor four pilina fund community members by making a gift to a nonprofit recipient of their choosing [6497; pc]
$10,000
Hawaii Association of Independent Schools · Honolulu, HI · 2024
To the hawaii association of independent schools to support an executive search process [6265; pc]
$10,000
Nurture Cultivate · Honolulu, HI · 2024
For support of a new koolauloa aina-based education program in hauula, oahu [5831; pc]
$10,000
Department of Education Windward District · Kaneohe, HI · 2024
Own your own future initiative: the wayfinder project - waimanalo and kailua high families successfully navigating college and career pathways [5786; gov]
$10,000
Kohala High School · Kapaau, HI · 2024
Own your own future initiative: it takes a village project [5813; gov]
$10,000
Malama Learning Center Corp · Honolulu, HI · 2024
Marine management mo'olelo: expanding public support of holomua: marine 30x30 through story-telling about the people of hawai`i dlnr-dar and docare [5501; pc]
$7,500
Kula Elementary School Pta · Kula, HI · 2024
Kula-kalama middle school transition [6214; pc]
$7,500
Pahoa High & Intermediate School · Pahoa, HI · 2024
Pahoa high and intermediate school middle school academy collaboration [6168; gov]
$7,500
West Hawaii Complex Area · Kailua Kona, HI · 2024
West hawaii middle school to high school academy transition planning [6218; gov]
$7,500
Moanalua Middle School · Honolulu, HI · 2024
Moanalua middle school 6th grade transition [6208; gov]
$7,500
Ka'U High and Pahala Elementary School · Pahala, HI · 2024
Ka'u high & pahala elementary school and naalehu elementary school transition partnership [6217; gov]
$5,000
Kauai Economic Development Board · Lihue, HI · 2024
To develop high-quality island-wide advisory boards that support area high schools and the related career academies [6084; pc]
$5,000
Boys To Men Mentoring Network of Hawaii Incorporated · Kamuela, HI · 2024
To support expansion of boys to men hawaii (btmh) programs on hawai'i island, maui and kauai [5938; pc]
$5,000
The Chamber of Commerce of Hawaii · Honolulu, HI · 2024
To support campbell complex middle school to career alignment through sector partnerships [6091; pc]
$5,000
Kalaheo High School · Kailua, HI · 2024
Kalaheo class of 2024 project grad [6164;pc]
$5,000
Kailua Historical Society · Kailua, HI · 2024
Unsolicited grant to kailua historical society in recognition of our longstanding commitment to kailua and to honor the memory of dr. Paul brennan [6121; nc]
$5,000
University of Hawaii Foundation · Honolulu, HI · 2024
To support the right to read: film screening & discussion, as part of the uh better tomorrow speaker series, to raise awareness about improving literacy education based in science in hawaii. [6352; pc]
$5,000
Malama Honua Public Charter School Foundation · Waimanalo, HI · 2024
Wylf youth grant: ko kakou kuleana [6011; pc]
$5,000
Kalaheo High School · Kailua, HI · 2024
To strengthen the quality of their natural resource pathway [6093; gov]
$5,000
James B Castle High School for Castle Performing Arts Center · Kaneohe, HI · 2024
Wylf youth grant: castle kids story time [6087; gov]

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Source: IRS Form 990-PF, Part XV, as filed by the foundation. These are grants already paid — a record of what this funder backs, not an open call. Most private foundations do not accept unsolicited applications; the route in is usually a program officer.