California · Nonprofit
CASTLEMONT HOME AND SCHOOL CLUB
CASTLEMONT HOME AND SCHOOL CLUB (California) receives grants from 3 organizations whose IRS filings report $3,036 to it, the largest being AMAZONSMILE FOUNDATION ($1,736). 2 of them have funded it in more than one year, and 57% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
Three funders worth looking at
Grantmakers with no record of funding this organization, ranked by how strongly the co-funder graph and the mission embeddings agree. The evidence is in section 03.
- Rotary Club of San Jose Foundationlocal
- William M Cage Library Trustportfolio match
- Cooking Autism Incportfolio match
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.
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.
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 5 of the last 9 reported years ran a deficit.
Who funds it, year by year
2018 → 2023: the base broadened from 1 funder to 2 funders, grant income rose $50 → $1k.
2 of 3 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 57% 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 CASTLEMONT HOME AND SCHOOL CLUB’s funders (the co-funder graph). Top 2 of 3 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
CASTLEMONT HOME AND SCHOOL CLUB leans on a few funders — its largest provides 57% of grant income and the top three 100%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
57% 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 CASTLEMONT HOME AND SCHOOL CLUB.
Largest funder’s share by year: 2018 100% · 2019 100% · 2020 100% · 2021 54% · 2022 100% · 2023 55% — diversifying over time.
“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.
Where its funders are
57% of CASTLEMONT HOME AND SCHOOL CLUB'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 $1k that is directly attributable, 100% of it comes from funders outside California, across 1 state.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $2k arriving through sponsors registered in 1 state 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.
Funders to approach
Grantmakers that don’t fund you yet, surfaced two ways: they back organizations that share your funders, or their grantees resemble your mission. The ones both signals agree on come first.
- Rotary Club of San Jose FoundationlocalCA · funds 76 organizations near you
- William M Cage Library Trustportfolio matchits grantees resemble your mission
- Cooking Autism Incportfolio matchits grantees resemble your mission
- Silicon Valley CreateslocalCA · funds 90 organizations near you
- Fanangel Foundation Incportfolio matchits grantees resemble your mission
- William M & Donna J Hoaglin Foundation Incportfolio matchits grantees resemble your mission
- Alliance for Educationportfolio matchits grantees resemble your mission
- Joyce and Vd Scott Foundationportfolio matchits grantees resemble your mission
- Haman Family Foundation Oag #98-1135portfolio matchits grantees resemble your mission
- Greater Nashville Fundingportfolio matchits grantees resemble your mission
- Reeves Foundationportfolio matchits grantees resemble your mission
- Yli Believe Foundationportfolio matchits grantees resemble your mission
From the co-funder graph (funders backing at least two comparable organizations, shrunk for grantee count, donor-advised and mega-funds excluded) and the universe embeddings. A research starting point; overlap is association, not a guarantee of fit.
Organizations like CASTLEMONT HOME AND SCHOOL CLUB
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.
Public support
100%
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 CASTLEMONT HOME AND SCHOOL CLUB: 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. How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds CASTLEMONT HOME AND SCHOOL CLUB?
- CASTLEMONT HOME AND SCHOOL CLUB (California) receives grants from 3 organizations whose IRS filings report $3,036 to it, the largest being AMAZONSMILE FOUNDATION ($1,736). 2 of them have funded it in more than one year, and 57% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does CASTLEMONT HOME AND SCHOOL CLUB have?
- IRS filings report 3 organizations giving $3,036 in grants to CASTLEMONT HOME AND SCHOOL CLUB, 2 of which have funded it in more than one year.
- Who is the largest funder of CASTLEMONT HOME AND SCHOOL CLUB?
- AMAZONSMILE FOUNDATION is the largest funder on record, with $1,736 in grants. The full list of funders is on this page.
- How can an organization like CASTLEMONT HOME AND SCHOOL CLUB 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 3funders 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 September 23, 2026. What this page cannot tell you · view filing