Samuel N & Mary Castle Fdn
The Samuel N. and Mary Castle Foundation is a private foundation based in Honolulu, Hawaii, founded in the 19th century. The foundation is dedicated to enhancing the lives of Hawaii's children and families through strategic investments in early childhood education and family support services.
Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
$38.6M
+2.8% YoY
Annual Giving
$1.9M
+4.5% YoY
Grant Count
1
+0.0% YoY
Avg Grant Size
$1.9M
+4.5% YoY
Under IRS private-foundation payout rules, Samuel N & Mary Castle Fdn reported a distributable amount of $2.5M for 2024 — the minimum it must pay out in qualifying distributions.
Mission & Focus Areas
The foundation seeks to improve access of all children ages 3-5 to high-quality early education in both the public and private realms. In addition, the foundation supports children 0-3 as part of its emphasis on strengthening families with young children.
Primary funding priorities include:
- Early education (pre-K and kindergarten)
- Pre-K teacher training and professional development
- Programs that expand access to quality education for low-income families
- Innovative approaches with accurate needs assessment and clear project outcomes
- Native Hawaiian early education with culture-based frameworks
- Services for children 0-36 months, including prenatal care and nutrition programs
- Accreditation achievement and retention for independent preschools
- Instructional quality improvements aligned with NAEYC standards
Grantmaking
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Geographic Focus
Where this funder awards grants
Statewide Hawaii, with primary focus on Honolulu and surrounding areas.
Grant Distribution by State
Cities
Financial History
Multi-year comparison from IRS filings
Assets: $38.8 million (as of 2023)
Annual Giving Trends:
- 2023: $2.1 million in total giving across 53 grants
- 2022: $2.0 million in total giving across 57 grants
- 2021: $2.1 million in total giving across 60 grants
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $38,577,746 | $37,534,270 | $38,775,256 |
| Revenue | $3,748,569 | $1,344,463 | $2,591,186 |
| Expenses | $2,717,846 | $2,581,008 | $2,802,653 |
| Qualifying Distributions | $2,352,726 | $2,259,458 | $2,536,940 |
| Net Investment Income | $3,393,572 | $1,030,903 | $2,350,231 |
| Distributable Amount | $2,525,984 | $2,308,008 | $2,339,581 |
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 1 recipients in 2024
Grant Size Distribution
152 grants across all recorded years
Open Grants
8 open opportunities from Samuel N & Mary Castle Fdn
Request for Proposals: Achieving and Retaining Accreditation Grant
SAMUEL N & MARY CASTLE FDN
Amount
US $15,000 - US $25,000
Deadline
Rolling / Open
RFP- Improving Instructional Quality in Hawaii’s Independent Preschool Grant
SAMUEL N & MARY CASTLE FDN
Amount
Up to US $30,000
Deadline
Rolling / Open
RFP: Improving Arts Education for Public and Private Preschools with an Emphasis on Low to Modest Income Families Grant
SAMUEL N & MARY CASTLE FDN
Amount
US $20,000 - US $25,000
Deadline
Rolling / Open
Giving History
Grant recipients and amounts by year
Among its reported 2024 grants, the largest include See Attached Statement ($1,936,030).
| Recipient | Purpose | Amount |
|---|---|---|
| SEE ATTACHED STATEMENT HONOLULU, HI | SEE ATTACHED STATEMENT | $1,936,030 |
Leadership & Key People
Officers and directors from IRS filings
Compensation Overview
From 2024 IRS filing
From 2024 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| ALFRED L CASTLE | PRESIDENT/TRUSTEE | 40 | $236,747 |
| CYNTHIA QUISENBERRY | SECRETARY/TRUSTEE | — | — |
| DR KITTREDGE BALDWIN | VICE PRESIDENT/TRUSTEE | — | — |
| DR ROBERT PETERS | TRUSTEE | — | — |
Recent News & Activity
Recent developments and announcements
The foundation has awarded grants to notable recipients including:
Samueli Foundation Announces $6.2 Million in Grants to Eight Nonprofits -University of Hawaii Foundation: $125,000 for H&D Memorial Early Childhood Education Scholarship and the Mary Tenny Castle Memorial Graduate Fellowship (2022)
Erikson Institute: $110,000 for Early Mathematics Teacher Education Program (2022)
Department of Education: $100,000 for Hawaii Early Childhood Educator Stipend Program (2022)
Hawaii Children's Action Network: $100,000 for operating support (2022)
Punahou School: $100,000 for Mary Tenney Castle Scholarship Fund (2022)
Catholic Diocese of Honolulu: Support for augmenting quality in Hawaii's independent preschools (2022)
The foundation maintains multiple application deadlines throughout the year, including December 22, May 4, and September 7 cycles for certain initiatives.
Frequently Asked Questions
What does Samuel N & Mary Castle Fdn fund?
The foundation seeks to improve access of all children ages 3-5 to high-quality early education in both the public and private realms. In addition, the foundation supports children 0-3 as part of its emphasis on strengthening families with young children. Primary funding priorities include: • Early education (pre-K and kindergarten) • Pre-K teacher training and professional development • Programs that expand access to quality education for low-income families • Innovative approaches with accura…
How do I apply for a grant from Samuel N & Mary Castle Fdn?
**Grant Amounts:** Typical awards range from $5,000 to $125,000, with median grants of $25,000. **Recent Grant Activity (2023):** • Total giving: $2.1 million • Number of grants: 53 **Active Grant Opportunities:** • Request for Proposals: Achieving and Retaining Accreditation ($15,000–$25,000) • RFP: Improving Arts Education for Public and Private Preschools with an Emphasis on Low to Modest Income Families • RFP: Improving Instructional Quality in Hawaii's Independent Preschools (up to $30,000)
Where does Samuel N & Mary Castle Fdn make grants?
Statewide Hawaii, with primary focus on Honolulu and surrounding areas.
What size grants does Samuel N & Mary Castle Fdn award?
In 2024, Samuel N & Mary Castle Fdn awarded 1 grants totaling $1.9M — an average of about $1.9M per grant, based on its IRS Form 990 filings.
How much is Samuel N & Mary Castle Fdn required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2024, Samuel N & Mary Castle Fdn reported a distributable amount of $2.5M on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is Samuel N & Mary Castle Fdn's EIN?
Samuel N & Mary Castle Fdn's EIN (Employer Identification Number) is 99-6003321. IRS Form 990 filing data is available on this page for 2020–2024.
Explore Open Grants
Browse active grant opportunities in Samuel N & Mary Castle Fdn's focus areas in our free grants database
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Data last updated June 2026. Sourced from IRS Form 990-PF filings. Research dossier generated April 2026.
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