California · Nonprofit
MARIN AUDUBON SOCIETY
MARIN AUDUBON SOCIETY (California) receives grants from 16 organizations whose IRS filings report $323,726 to it, the largest being DONOR ADVISED CHARITABLE GIVING INC ($128,112). 10 of them have funded it in more than one year, and 69% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2025
- $2.2M
- Funders on record
- 16
- Grants received
- $324k
- Net assets
- $9.4M
What Marin Audubon Society does
Mission
The Marin Audubon Society is dedicated to active participation in conservation, environmental education, and enjoyment of our natural heritage. We advocate sound land and water resource planning, and act to restore, enhance, and safeguard our wetlands and other natural habitats. Birds and other wildlife are the indicators of the health or our environment, and we remain committed to their protection and preservation.
As stated on its FY2025 Form 990.
Programs
CONSERVATION: We continued work on a sea-level rise adaptation project to expand marsh habitat and increase flood protection and provide public access for nearby underserved communities. The project, to be completed on our 20-acre property in San Rafael, includes refining design, coordinating among agencies and conducting public outreach.Our continued stewardship activities on our other properties (comprising over 500 acres), includes revegetation with over 5,000 native plants, and removal of Non-native Limonium. We also are involved in the recruitment of local high school students to help restore habitat.We advocated for the protection of wildlife and habitats on proposed projects and activities having potential impact on natural resources.We partnered with other organizations in legal efforts to protect wildlife in GGNRA and Pt Reyes National Seashore, including providing financial support to the Protection of Farallon Islands.We act as a fiscal sponsor for two independent charitable projects, the Marin County Breeding Bird Atlas and the Marin Baylands Advocates. These projects operate under our oversight. The Breeding Bird Atlas is a multi-year project that is mapping the…
$621,316 spentof which $45,000 as grants93% of program spendingEDUCATION: We offered 66 field trips and 10 speaker series programs on birds and other natural history topics; sponsored 3 Marin County Christmas Bird counts; published 10 newsletters, distributed electronically or by mail to our members. Newsletters included field trip reports, articles about climate change initiatives, and reports of our ongoing efforts to protect the environment. We also offered volunteer opportunities for adults and community service workdays for students working on habitat enhancement on our properties.
$44,149 spent$5,296 earned by the program7% of program spending
The 2 programs described on its FY2024 Form 990, listed largest first by expense. Program spending in total: $665,465.
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 2024 to 2025, from $7.4M to $9.5M (+29%).
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: 2017 2% · 2018 60% · 2019 62% · 2020 22% · 2021 51% · 2022 50% · 2023 71% · 2024 18% · 2025 13%. Grants only. Government contracts and fees sit inside program revenue.
95% of MARIN AUDUBON SOCIETY’s revenue is contributions — more donation-reliant than the typical peer (88% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 1 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.
Who funds it, year by year
2017 → 2023: the base broadened from 3 funders to 7 funders, grant income rose $6k → $33k.
5 of 16 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 69% 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 MARIN AUDUBON SOCIETY’s funders (the co-funder graph). 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
MARIN AUDUBON SOCIETY leans on a few funders — its largest provides 40% of grant income and the top three 78%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
76% 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 MARIN AUDUBON SOCIETY.
Largest funder’s share by year: 2017 90% · 2018 91% · 2019 49% · 2020 35% · 2021 50% · 2022 61% · 2023 43% — 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.
How long its funders stay
50% of MARIN AUDUBON SOCIETY's funders are still giving 3 years after their first grant; 63% 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
69% of MARIN AUDUBON SOCIETY'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 $101k that is directly attributable, 63% of it comes from California funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $222k arriving through sponsors registered in 5 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
MARIN AUDUBON SOCIETY runs a healthier operating margin than three-quarters of the 1,074 environment nonprofits its size.
this organization peer median middle 50% of peers· 1,074 environment nonprofits $1M–$10M, FY2025
Organizations like MARIN AUDUBON SOCIETY
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
83%
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 MARIN AUDUBON SOCIETY: 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 MARIN AUDUBON SOCIETY?
- MARIN AUDUBON SOCIETY (California) receives grants from 16 organizations whose IRS filings report $323,726 to it, the largest being DONOR ADVISED CHARITABLE GIVING INC ($128,112). 10 of them have funded it in more than one year, and 69% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does MARIN AUDUBON SOCIETY have?
- IRS filings report 16 organizations giving $323,726 in grants to MARIN AUDUBON SOCIETY, 10 of which have funded it in more than one year.
- Who is the largest funder of MARIN AUDUBON SOCIETY?
- DONOR ADVISED CHARITABLE GIVING INC is the largest funder on record, with $128,112 in grants. The full list of funders is on this page.
- How can an organization like MARIN AUDUBON SOCIETY 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 16 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