Belvedere-tiburon Landmarks Society is a 501(c)(3) organization based in Tiburon, California, registered in 1962, with $367,386 in FY2025 revenue. CharityIndex grades it D.
Revenue (FY2025)
$367K
▼ 31.4% vs prior year
Arts & Culture median: $159K
Expenses (FY2025)
$536K
Net assets
$5.0M
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 Belvedere-tiburon Landmarks Society— 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 Belvedere-tiburon Landmarks Society: 112 mo reserves · -46% margin earns a D 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 Belvedere-tiburon Landmarks Society— 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 Belvedere-tiburon Landmarks Society: 2 of 5 disclosure signals earns a C on this criterion. See the exact thresholds →
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Revenue grew from $115K (FY2015) to $367K (FY2025) across 9 reported years.
Financial snapshot
Operating margin
-45.9%
Spent more than it raised in the latest fiscal year.
Total assets
$5.1M
Total liabilities
$64K
Net assets
$5.0M
| Fiscal year | Revenue | Expenses | Net assets | Total assets | Form |
|---|---|---|---|---|---|
| 2025 | $367,386▼31.4% | $536,112▲10.2% | $5,009,448▲3.3% | $5,073,234▲3.5% | 990 |
| 2024 | $535,586▼24.5% | $486,609▲2.5% | $4,847,838▲5.7% | $4,903,404▲6.0% | 990 |
| 2023 | $709,062▲70.3% | $474,820▲8.3% | $4,584,965▲11.6% | $4,627,371▲11.7% | 990 |
| 2022 | $416,267▲2.2% | $438,399▲10.8% | $4,109,406▼7.7% | $4,143,572▼7.4% | 990 |
| 2021 | $407,170▲228% | $395,781▲27.3% | $4,451,698▲5.5% | $4,475,074▲1.4% | 990 |
| 2020 | $123,990▲8.8% | $311,001▼11.1% | $4,220,537▲3.8% | $4,413,565▲8.0% | 990 |
| 2019 | $113,912▼6.5% | $349,924▼3.5% | $4,065,369▲4.7% | $4,086,388▲4.4% | 990 |
| 2018 | $121,890▲6.3% | $362,663▲21.9% | $3,884,251▼1.0% | $3,912,472▼0.5% | 990 |
| 2015 | $114,688 | $297,449 | $3,924,648 | $3,930,897 | 990 |
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.
13 grants to Belvedere-tiburon Landmarks Society totaling $458K, reported by foundations on their Schedule I filings.
| Grantmaker | Purpose | Year | Amount |
|---|---|---|---|
| Marin Community Foundation | Provide general operating support | 2023 | $302,279 |
| Donor Advised Charitable Giving | Arts, culture & humanities | 2023 | $32,000 |
| Marin Community Foundation | General operating support | 2022 | $21,500 |
| Fidelity Investments Charitable Gift Fund | For grant recipient's exempt purposes | 2022 | $9,000 |
| Marin Community Foundation | General operating support | 2021 | $20,981 |
| Fidelity Investments Charitable Gift Fund | For grant recipient's exempt purposes | 2021 | $6,250 |
| Fidelity Investments Charitable Gift Fund | For grant recipient's exempt purposes | 2021 | $6,250 |
| Marin Community Foundation | General operating support | 2020 | $16,214 |
| Donor Advised Charitable Giving | Arts, culture & humanities | 2020 | $7,650 |
| Donor Advised Charitable Giving | Arts, culture & humanities | 2020 | $7,650 |
| Fidelity Investments Charitable Gift Fund | For grant recipient's exempt purposes | 2020 | $6,650 |
| Marin Community Foundation | Support the kiln and garden house | 2019 | $15,702 |
| Fidelity Investments Charitable Gift Fund | For grant recipient's exempt purposes | 2019 | $5,950 |
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Data for Belvedere-tiburon Landmarks Society (EIN 94-6104011) 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.