California · Nonprofit
MARIN HUMANE SOCIETY
MARIN HUMANE SOCIETY (California) receives grants from 120 organizations whose IRS filings report $6,824,784 to it, the largest being DONOR ADVISED CHARITABLE GIVING INC ($856,496). 72 of them have funded it in more than one year, and 56% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2025
- $14M
- Funders on record
- 120
- Grants received
- $6.8M
- Net assets
- $30M
What Marin Humane Society does
Mission
Marin humane transforms lives through exceptional animal care, humane education, and advocacy. Every day, marin humane inspires compassion and positive relationships between people and animals.
As stated on its FY2025 Form 990.
Programs
Animal services - marin humane provides all animal services to marin county (11 cities and unincorporated marin county) based on a negotiated joint powers agreement (jpa). Animal services includes enforcing the animal related ordinances, rescuing animals in distress, investigating complaints including cases of animal cruelty and neglect, picking up and caring for stray and deceased animals, and processing the pet licensing program. Marin humane's animal service officers are scheduled for 24 hours a day, 365 days a year coverage.
$3,545,140 spent35% of program spendingEducation and community services - marin humane provides a variety of educational opportunities and outreach programs aimed at increasing responsible pet guardianship and achieving marin humane's mission. Included among these are animal training classes and behavior consultations in the behavior & training department, seminars and workshops, classroom visits, shelter tours, student volunteer opportunities, summer camp, after school clubs, and animal assisted therapy visitations. Marin humane also provides free pet food and assistance to the pets of hundreds of low income guardians throughout marin county as part of an effort to keep pets in their homes as long as possible.
$2,794,230 spent$799,525 earned by the program28% of program spendingClinic & adoption - the clinic provides medical care and spay/neuter surgeries for all marin humane animals. Marin humane facilitates adoptions by matching prospective pet owners with the right pet for their family and provides post-adoption support. Adoptions take place at multiple locations in marin county as well as the hopalong location in oakland.
$3,625,872 spent$559,850 earned by the program36% of program spendingThrift shop:since 1961, auxiliary volunteers have operated a thrift shop in san anselmo. Revenues from the thrift shop support marin humane's veterinary services.
$40,750 spent$32,175 earned by the program0% of program spending
The 4 programs described on its FY2023 Form 990, listed largest first by expense. Program spending in total: $10,005,992.
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 2023 to 2024, from $25M to $30M (+22%).
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 39% · 2018 36% · 2019 41% · 2020 36% · 2021 36% · 2022 37% · 2023 39% · 2024 23% · 2025 30%. Grants only. Government contracts and fees sit inside program revenue.
77% of MARIN HUMANE SOCIETY’s revenue is contributions — more donation-reliant than the typical peer (67% 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.
Chief executive
Nancy Mckenney
CEO & president
Board chair
Sandy Monticelli
Board chair
As listed on its FY2025 Form 990.
Who funds it, year by year
2017 → 2023: the base broadened from 30 funders to 50 funders, grant income rose $228k → $917k.
20 of 120 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 56% 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 HUMANE SOCIETY’s funders (the co-funder graph). Top 30 of 120 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
MARIN HUMANE SOCIETY has a broad base — no single funder exceeds 13% of grant income, and it takes 6 funders to reach half.
the vertical line marks half of all grant income — 6 funders to its left
60% 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 HUMANE SOCIETY.
Largest funder’s share by year: 2017 22% · 2018 18% · 2019 19% · 2020 14% · 2021 16% · 2022 15% · 2023 18% — 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
42% of MARIN HUMANE SOCIETY's funders are still giving 3 years after their first grant; 60% 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
56% of MARIN HUMANE 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 $3.0M that is directly attributable, 76% of it comes from California funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $3.8M arriving through sponsors registered in 13 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 HUMANE SOCIETY's revenue grew 66% between 2017 and 2025.
this organization peer median middle 50% of peers· 134 animals nonprofits $10M–$100M, FY2025
Organizations like MARIN HUMANE 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
79% of spending goes to programs.
Governance
Public support
90%
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 HUMANE 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 HUMANE SOCIETY?
- MARIN HUMANE SOCIETY (California) receives grants from 120 organizations whose IRS filings report $6,824,784 to it, the largest being DONOR ADVISED CHARITABLE GIVING INC ($856,496). 72 of them have funded it in more than one year, and 56% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does MARIN HUMANE SOCIETY have?
- IRS filings report 120 organizations giving $6,824,784 in grants to MARIN HUMANE SOCIETY, 72 of which have funded it in more than one year.
- Who is the largest funder of MARIN HUMANE SOCIETY?
- DONOR ADVISED CHARITABLE GIVING INC is the largest funder on record, with $856,496 in grants. The full list of funders is on this page.
- How can an organization like MARIN HUMANE 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.
Play a game about who funds Marin Humane Society →
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 120 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 22, 2026. What this page cannot tell you · view filing