Foundations · IRS 990 filings

Foundations in Honolulu, Hawaii

338
foundations with a Honolulu address
$272.3M
grants paid, FY2023–FY2025
100
say they accept unsolicited
$10,000
median grant

Grantlas lists 338 foundations that gave a Honolulu, Hawaii address on their tax filing — 327 private foundations and 11 grantmaking charities such as community foundations and United Ways — from filings for FY2023–FY2025. Together they paid out $272.3 million in grants in their latest filing year, and 100 of them (30%) say they accept unsolicited requests.

Not every foundation here is a Honolulu foundation. The city is the mailing address on the foundation’s tax filing, and when a bank or a law firm runs the trust that is the bank’s address, not the place it gives to. Check where a foundation gives before you write.

Top 25 of 338 foundations

All 25 foundations below say on their 990-PF that they accept unsolicited requests. Another 75 in this list say so too. Ranked by what they paid in grants in their latest filing.

Foundations in Honolulu, Hawaii
Atherton Family Foundation$5.6M$5.6M—FY2024Locked: fit score and contacts
The Clarence Tc Ching Foundation$25,000$5.4M$5,000–$600,000FY2024Locked: fit score and contacts
Kosasa Foundation$45,000$5.2M$3,000–$500,000FY2024Locked: fit score and contacts
The Victoria S and Bradley L Geist Foundation$2.9M$3.2M$2.6M–$3.2MFY2025Locked: fit score and contacts
Hmsa Foundation$50,000$2.1M$2,000–$1.2MFY2024Locked: fit score and contacts
Frost Family Foundation$25,000$2M$5,000–$1.1MFY2024Locked: fit score and contacts
Samuel N & Mary Castle Foundation$1.9M$1.9M—FY2024Locked: fit score and contacts
First Hawaiian Bank Foundation$25,000$1.8M$2,500–$250,000FY2024Locked: fit score and contacts
The Strong Foundation$100,000$1.6M$50,000–$200,000FY2024Locked: fit score and contacts
Tradewind Group Foundation$4,596$1.5M$30–$100,510FY2025Locked: fit score and contacts
Cooke Foundation Limited$20,000$1.4M$2,617–$391,859FY2024Locked: fit score and contacts
Bank of Hawaii Charitable Foundation$25,000$1.4M$1,000–$297,500FY2024Locked: fit score and contacts
Hawaii Realtors Charitable Foundation$2,500$1.3M$200–$3,000FY2024Locked: fit score and contacts
Hawaiian Electric Industries Charitable$1.3M$1.3M—FY2024Locked: fit score and contacts
Ama Olukai Foundation$12,000$1.2M$300–$1MFY2025Locked: fit score and contacts
Charles and Mitch Ota Foundation$20,000$1.1M$5,000–$100,000FY2025Locked: fit score and contacts
Central Pacific Bank Foundation$6,477$816,461$300–$110,000FY2025Locked: fit score and contacts
Hans and Clara Zimmerman Foundation$6,000$777,983$2,500–$241,053FY2025Locked: fit score and contacts
The Cades Foundation$7,500$710,920$1,000–$50,000FY2024Locked: fit score and contacts
J Watumull Fund$2,000$683,500$500–$50,000FY2024Locked: fit score and contacts
First Insurance Company$5,000$540,780$40–$48,350FY2025Locked: fit score and contacts
Loretta Luke Yajima Dream Big$100,000$512,000$100,000–$312,000FY2025Locked: fit score and contacts
Altres Foundation$500$510,084$20–$200,000FY2025Locked: fit score and contacts
Teresa Hughes Trust$37,500$415,000$20,000–$55,000FY2025Locked: fit score and contacts
Antone and Edene Vidinha Trust$50,000$381,541$22,520–$86,541FY2024Locked: fit score and contacts
  • Median grant and grant range come from the 990-PF grant schedule; a dash means there is none to report.
  • “One grant” means a schedule with a single grant — no median, nothing to range over. “One amount” means several grants, all the same size.

313 more foundations — see all in Grantlas

Data from 990-PF and Form 990 filings, FY2023–FY2025. Updated November 8, 2026.