William K Warren Foundation is a 501(c)(3) organization based in Tulsa, Oklahoma, registered in 1947, with $28,720,838 in FY2024 revenue. CharityIndex grades it B.
Revenue (FY2024)
$28.7M
▲ 8.2% vs prior year
Philanthropy median: $168K
Expenses (FY2024)
$28.4M
Net assets
$327.9M
Employees
—
Measures how much of every dollar spent actually reaches programs, plus what it costs to raise $100 of donations. The worse of the two measures sets the letter (85%+ to programs is an A; under $15 to raise $100 is an A), averaged over the three most recent filings. Not scored for William K Warren Foundation— this filing type doesn't report it, and the rating simply skips it (never counts it against the organization). See the exact thresholds →
Measures whether the organization is built to last: how many months its reserves would cover expenses (3+ months earns an A-range score, but hoarding 5+ years of budget is capped) and whether it runs a surplus or a deficit. For William K Warren Foundation: 139 mo reserves · +1% margin earns a B+ on this criterion. See the exact thresholds →
Checks how the organization is run, from its own Form 990: an independent board majority, a board of five or more, conflict-of-interest, whistleblower and document-retention policies, and independently audited financials. The share of disclosed checks that pass sets the letter. Not scored for William K Warren Foundation— this filing type doesn't report it, and the rating simply skips it (never counts it against the organization). See the exact thresholds →
Counts five disclosure signals: a recent filing, a mission statement, program descriptions, a listed website, and the full expense breakdown. More disclosure, better letter. For William K Warren Foundation: 2 of 5 disclosure signals earns a C on this criterion. See the exact thresholds →
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Revenue declined from $44.5M (FY2020) to $28.7M (FY2024) across 5 reported years.
Financial snapshot
Operating margin
1.2%
Revenue exceeded expenses in the latest fiscal year.
Total assets
$331.4M
Total liabilities
$3.4M
Net assets
$327.9M
| Fiscal year | Revenue | Expenses | Net assets | Total assets | Form |
|---|---|---|---|---|---|
| 2024 | $28,720,838▲8.2% | $28,385,574▲2.4% | $327,928,895▲2.4% | $331,363,796▲2.0% | 990PF |
| 2023 | $26,542,294▼22.5% | $27,729,284▲8.1% | $320,305,690 | $324,945,641▼0.4% | 990PF |
| 2022 | $34,266,089▼10.3% | $25,642,380▲7.0% | $320,365,809▲3.2% | $326,242,777▲2.3% | 990PF |
| 2021 | $38,179,587▼14.2% | $23,960,329▲15.2% | $310,329,896▲5.4% | $318,898,600▲5.0% | 990PF |
| 2020 | $44,494,480 | $20,801,216 | $294,323,126 | $303,630,989 | 990PF |
Original Form 990 PDFs (the Form column) are served by ProPublica Nonprofit Explorer, as filed with the IRS. Create a free account to download the CSV report.
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Data for William K Warren Foundation (EIN 73-0609599) comes from the IRS Business Master File and e-filed Form 990 returns, via CharityIndex. Figures reflect what the organization reported to the IRS for each fiscal year.