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Nevada · Nonprofit
GLENBROOK UNDERGROUND INC (Nevada) is funded by 19 grantmakers whose IRS filings report $3,146,500 in grants to it, the largest being NATIONAL PHILANTHROPIC TRUST ($575,000). 6 of them have funded it in more than one year.
Against its field
GLENBROOK UNDERGROUND INC has grown faster than three-quarters of the 3,678 community improvement nonprofits its size.
this organization peer median middle 50% of peers· 3,678 community improvement nonprofits $1M–$10M, FY2024
Revenue, expenses and net assets — each indexed to 100 at its first filing year, so you read the trajectory, not the magnitude. The shaded band is where the middle 50% of its peers' revenue would sit, given their growth.
The funding model — what share of revenue comes from contributions, programs, investments and other sources — and whether it's shifting.
51% of GLENBROOK UNDERGROUND INC’s revenue is contributions — about as donation-reliant as the typical peer (60% for the typical peer).
Operating surplus or deficit each year, and months of liquidity in hand. 1 of the last 3 reported years ran a deficit.
The base broadened — 2 funders to 12 as grant income moved $155k → $933k.
12 of 19 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 83% 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 GLENBROOK UNDERGROUND INC’s funders (the co-funder graph). Association, not causation.
GLENBROOK UNDERGROUND INC has a broad base — no single funder exceeds 18% of grant income, and it takes 3 funders to reach half.
the vertical line marks half of all grant income — 3 funders to its left
Largest funder’s share by year: 2022 97% · 2023 28% · 2024 32% — diversifying over time.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration.
GLENBROOK UNDERGROUND INC draws 80% of its grant income from funders outside Nevada — its reputation reaches beyond the state, across 10 states in all.
In-state vs out-of-state, by year
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. Your 19 funders put you under-funded among the 400 organizations that share them.
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.
Nonprofits whose mission and program text most resemble this one, by semantic similarity over the universe of US filings — the closest peers, and often the clearest route to shared or prospective funders.
Read directly from this organization’s own Form 990, as neutral context.
100% of spending goes to programs.
Operates in 1 state
Every figure is read directly from IRS Form 990 / 990-PF e-file XML — this organization’s own return for FY2024 (financials across 2022–2024), and the filings of 19funders 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. view filing