California · Nonprofit
HILLSDALE HIGH SCHOOL FOUNDATION
HILLSDALE HIGH SCHOOL FOUNDATION (California) receives grants from 25 organizations whose IRS filings report $2,162,015 to it, the largest being DONOR ADVISED CHARITABLE GIVING INC ($1,069,840). 15 of them have funded it in more than one year, and 95% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2025
- $1.1M
- Funders on record
- 25
- Grants received
- $2.2M
- Net assets
- $984k
What Hillsdale High School Foundation does
Mission
The Hillsdale High School Foundation raises funds to sustain hillsdale high school's unique academic environment of small learning communities (slcs). The slc model provides a personalized, rigorous, and engaging education
As stated on its FY2025 Form 990.
Programs
Hhsf provides small grants and/or fundraising support to hillsdale high school booster groups(athletics; dance; drama; music; and parent teacher student organization, or ptso); the empowerment through action (eta) program for high-risk students; and the peace pantry, which provides food to low-income students. Hhsf also provides funding support for a variety of activities and classroom needs, including: technology purchases, teacher professional development, student college application fees, and college and career counseling and coaching for students.
$1,729,469 spentof which $31,000 as grants82% of program spendingHhsf provides funds to the san mateo union high school district (smuhsd) to support hillsdale high schools small learning community (slc) model. These funds support additional staffing salaries beyond what smuhsd provides, which in turn allow for advisory sections that meet every day to work on developing and supporting all students inside and outside the classroom. Funding also gives advisors the opportunity to meet with each student's group of core teachers on a regular basis to discuss academic performance. Both of these activities are fundamental components of the slc model.
$301,028 spentof which $301,028 as grants14% of program spendingHhsf makes scholarships available to graduating seniors based on need and merit. Students are selected as recipients for these awards based on school and community service.
$67,405 spentof which $67,405 as grants3% of program spending
The 3 programs described on its FY2024 Form 990, listed largest first by expense. Program spending in total: $2,097,902.
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 2023 to 2024, from $844k to $2.1M (+146%).
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.
Government-grant reliance: 2021 1%. Grants only. Government contracts and fees sit inside program revenue.
94% of HILLSDALE HIGH SCHOOL FOUNDATION’s revenue is contributions — more donation-reliant than the typical peer (82% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 2 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.
Chief executive
Marcine Jansen
Executive director
As listed on its FY2025 Form 990.
Who funds it, year by year
2017 → 2023: the base broadened from 5 funders to 11 funders, grant income rose $21k → $227k.
10 of 25 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 95% 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 HILLSDALE HIGH SCHOOL FOUNDATION’s funders (the co-funder graph). Top 24 of 25 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
HILLSDALE HIGH SCHOOL FOUNDATION leans on a few funders — its largest provides 49% of grant income and the top three 88%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
96% of the income these shares are computed over arrives through pass-through sponsors or from payers whose filings do not say what kind of payment it is. Concentration is still measured over all of it, because the money is real; what it does not support is a claim about how many institutions have chosen to fund HILLSDALE HIGH SCHOOL FOUNDATION.
Largest funder’s share by year: 2017 34% · 2018 45% · 2019 53% · 2020 58% · 2021 72% · 2022 63% · 2023 48% — 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
44% of HILLSDALE HIGH SCHOOL FOUNDATION's funders are still giving 3 years after their first grant; 60% 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
95% of HILLSDALE HIGH SCHOOL FOUNDATION's grant income arrives through donor-advised or pass-through sponsors, whose addresses record where the money is held rather than where the donor is. Of the $102k that is directly attributable, 90% of it comes from California funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $2.1M arriving through sponsors registered in 8 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
HILLSDALE HIGH SCHOOL FOUNDATION is better cushioned than half of the 1,504 philanthropy nonprofits its size.
this organization peer median middle 50% of peers· 1,504 philanthropy nonprofits $1M–$10M, FY2025
Organizations like HILLSDALE HIGH SCHOOL FOUNDATION
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 California
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
96% of spending goes to programs.
Governance
Public support
98%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 1 state
Screen this organization
A dated, signed PDF of the compliance screen for HILLSDALE HIGH SCHOOL FOUNDATION: 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 HILLSDALE HIGH SCHOOL FOUNDATION?
- HILLSDALE HIGH SCHOOL FOUNDATION (California) receives grants from 25 organizations whose IRS filings report $2,162,015 to it, the largest being DONOR ADVISED CHARITABLE GIVING INC ($1,069,840). 15 of them have funded it in more than one year, and 95% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does HILLSDALE HIGH SCHOOL FOUNDATION have?
- IRS filings report 25 organizations giving $2,162,015 in grants to HILLSDALE HIGH SCHOOL FOUNDATION, 15 of which have funded it in more than one year.
- Who is the largest funder of HILLSDALE HIGH SCHOOL FOUNDATION?
- DONOR ADVISED CHARITABLE GIVING INC is the largest funder on record, with $1,069,840 in grants. The full list of funders is on this page.
- How can an organization like HILLSDALE HIGH SCHOOL FOUNDATION find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in California. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
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 25 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 14, 2026. What this page cannot tell you · view filing