Hawaii · Nonprofit
'IOLANI SCHOOL
'IOLANI SCHOOL (Hawaii) receives grants from 96 organizations whose IRS filings report $19,636,879 to it, the largest being ARRILLAGA FOUNDATION ($5,000,000). 68 of them have funded it in more than one year.
- Revenue FY2025
- $111M
- Funders on record
- 96
- Grants received
- $20M
- Net assets
- $367M
What 'Iolani School does
Mission
To develop educated, well-rounded individuals who are well prepared for college.
As stated on its FY2025 Form 990.
Programs
'iolani was founded in 1863 after king kamehameha iv and queen emma set out to establish an anglican church in hawaii. The school was rooted in three small schools - a lahaina school on the island of maui, st. Alban's college and 'iolani college - formed during hawaii's monarchy days.the school's campus was once located on the grounds of st. Andrew's cathedral, moved to nu'uanu, and then finally relocated in 1946 to its present 25-acre property. 'iolani was originally an all-boys school, but became co-educational in 1979.today, 'iolani's enrollment has grown to approximately 2,300 students, with roughly 1,500 in grades 7 - 12. There are approximately 480 full-time faculty and staff dedicated to students from diverse backgrounds enrolled in grades k - 12. Roughly 850 part-time or seasonal teachers, aides, coaches, and staff supplement the school's expansive after-school, summer, performing arts, athletic and extracurricular programs. The school's faculty is highly qualified and committed to their students with relational teaching a high priority. Teachers are encouraged to attend conferences either locally or nationally to stay abreast of current and effective pedagogies.'iolani…
$70,581,612 spentof which $8,762,915 as grants$71,087,840 earned by the program83% of program spending'iolani offers an extensive summer and after school program with reinforcement, enrichment, elective and credit courses. These courses are open to students from all schools and are available on a first come first serve registration basis. More than 2,500 students enroll each year in 'iolani's summer and special programs, which include offerings in the following fields: dance, physical education, art, math, reading, robotics, video game design, sat preparation, and others. Many students come from the u.s. Mainland and asia to enroll their children in 'iolani's summer programs, which utilizes teachers who are employed by 'iolani, other independent schools, and public schools. In addition, the ka'I program is a summer mentoring partnership between 'iolani and jarrett middle school, a neighboring public middle school. The performing arts department at 'iolani offers orchestra, dance (hula, ballet, jazz), stage band, marching band, jazz band, theater, musical theater, and choir. These different disciplines showcase their students' abilities through performances held either on campus or at theaters and other venues in the community. These groups also travel to the mainland and foreign…
$7,042,102 spent$3,849,886 earned by the program8% of program spending'iolani is a member of the interscholastic league of honolulu (ilh). All participants are expected to fulfill all athletic requirements, to display good sportsmanship, and to follow the program set forth by coaches and the athletic department. There are over 20 varsity sports for boys and girls, as well as many sports in the junior varsity and intermediate grade levels.for the lower grade levels, 'iolani participates in the christian schools athletic league for basketball and volleyball. There are also opportunities for students to participate in intramural sports.the campus hosts numerous athletic tournaments and sporting games, which schools and teams from across the state and around the world participate in. Some examples of how the school shares its resources include: the 'iolani classic basketball tournament, state forensics tournament, 'iolani invitational cross country meet, hawaii educational summit, and many more.
$3,576,367 spent$74,797 earned by the program4% of program spendingCollege counseling
$3,886,298 spent5% of program spending
The 4 programs described on its FY2024 Form 990, listed largest first by expense. Program spending in total: $85,086,379.
The organization over time
Each line starts at 100 in 2017, so what you read is the shape rather than the size: 150 means half as much again as 2017, 50 means half. The number beside each label in the key is where it ended. The shaded band is where the middle 50% of its peers' revenue would sit, given their growth.
Balance sheet
Total assets and total liabilities at each year end, in dollars. The largest one-year move in total assets was 2022 to 2023, from $354M to $420M (+19%).
How it's funded, over time
Each bar is one year's revenue split into where it came from, and every bar is the same height — these are shares, not amounts, so a year that raised twice as much looks the same size. Hover a bar for the split.
22% of 'IOLANI SCHOOL’s revenue is contributions — more donation-reliant than the typical peer (14% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 0 of the last 9 reported years ran a deficit.
reserve
Leadership and staff
The officers, directors, trustees and key employees listed on each return. Joined and no longer listed compare each filing with the year before, matching people by surname and first initial; a year after a gap, or a roster under three people, has no comparison.
Board chair
Mark M Mugiishi
Board of governors chair
As listed on its FY2025 Form 990.
Who funds it, year by year
2017 → 2023: the base broadened from 16 funders to 51 funders, grant income rose $283k → $7.2M.
20 of 96 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 19% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.
From the IRS filings of 'IOLANI SCHOOL’s funders (the co-funder graph). Top 30 of 96 funders by total. Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How concentrated its funding is
'IOLANI SCHOOL has a broad base — no single funder exceeds 25% of grant income, and it takes 4 funders to reach half.
the vertical line marks half of all grant income — 4 funders to its left
Largest funder’s share by year: 2017 29% · 2018 18% · 2019 24% · 2020 16% · 2021 14% · 2022 16% · 2023 70% — growing more concentrated.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How long its funders stay
55% of 'IOLANI SCHOOL's funders are still giving 3 years after their first grant; 71% give in more than one year at all.
Share of funders still giving k years after their first recorded grant, pooled across every acquisition cohort. A funder counts as retained in a year only if it made a grant that year. Measured to FY2023, the last fiscal year that has finished arriving — a funder cannot be counted as lapsed in a year most filers have not reached.
Where its funders are
58% of 'IOLANI SCHOOL's grant income comes from Hawaii funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $3.8M arriving through sponsors registered in 15 states is excluded from the map and the split above: a sponsor holds money on a donor’s behalf, so its registered address would place those dollars somewhere no donor need ever have been. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Against its field
'IOLANI SCHOOL runs a healthier operating margin than half of the 684 education nonprofits its size.
this organization peer median middle 50% of peers· 684 education nonprofits over $100M, FY2025
Organizations like 'IOLANI SCHOOL
Organizations whose mission and program text most resemble this one, by semantic similarity over every organization in the US filings — the closest peers, and often the clearest route to shared or prospective funders.
In Hawaii
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
84% of spending goes to programs.
Governance
Public support
50%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 1 state
Part of a family of 3 related entities
- Building Futures LLC · disregarded
- Kaneohe Properties Inc · corp_trust
- H&M Mist Trust · corp_trust
Screen this organization
A dated, signed PDF of the compliance screen for 'IOLANI SCHOOL: IRS status (Business Master File, Publication 78, auto-revocation), the OFAC sanctions lists, the Internal Revenue Bulletin, and California registration, with the Rev. Proc. 2018-32 §8.01 reliance elements stated element by element. Generated from the current files at the moment you download it.
Screens are triage, not determinations; a source that cannot be read reports not screened, never clear. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds 'IOLANI SCHOOL?
- 'IOLANI SCHOOL (Hawaii) receives grants from 96 organizations whose IRS filings report $19,636,879 to it, the largest being ARRILLAGA FOUNDATION ($5,000,000). 68 of them have funded it in more than one year.
- How many funders does 'IOLANI SCHOOL have?
- IRS filings report 96 organizations giving $19,636,879 in grants to 'IOLANI SCHOOL, 68 of which have funded it in more than one year.
- Who is the largest funder of 'IOLANI SCHOOL?
- ARRILLAGA FOUNDATION is the largest funder on record, with $5,000,000 in grants. The full list of funders is on this page.
- How can an organization like 'IOLANI SCHOOL find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Hawaii. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
Play a game about who funds 'Iolani School →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2017–2025), and the filings of 96 funders that report grants to it. “On record” means captured in the filings we have parsed — a funder that does not e-file, or whose grant detail is not itemized, will not appear. Filings run roughly 12–24 months behind. Trends on this page end at FY2023, the last fiscal year that has finished arriving; later years are shown and marked, and move no figure. Data on this page was exported October 22, 2026. What this page cannot tell you · view filing