California · Nonprofit
RITTER CENTER
RITTER CENTER (California) receives grants from 70 organizations whose IRS filings report $9,222,004 to it, the largest being LEONARD & BERYL BUCK FOUNDATION ($3,565,250). 40 of them have funded it in more than one year.
- Revenue FY2025
- $13M
- Funders on record
- 70
- Grants received
- $9.2M
- Net assets
- $11M
What Ritter Center does
Mission
Ritter Center's mission is to reduce the negative impacts of homelessness and poverty by providing comprehensive health and social support services to individuals, families, and the greater community of marin county, california.
As stated on its FY2025 Form 990.
Programs
Health centerto take a comprehensive, integrative approach to health care and focus on supporting the whole person. Our health center provides primary health care services to individuals who otherwise could not afford it, and every client receives a comprehensive treatment plan. Our chief medical officer, dr. Yasmeen shaguffa, and a team of nurse practitioners provide preventative care and address urgent concerns. Rory rieger, ma, cadc-ii, cctp manages our behavioral health team to provide psychiatry, psychotherapy, and substance use counseling. The organization served 1075 patients and provided 5,040 visits.
$3,735,975 spent$1,126,184 earned by the program42% of program spendingCase managementthe center's case managers meet one-on-one with individuals and families in need of assistance. Case managers evaluate each client's immediate and long-term needs through an interview assessment process. Together, the client and case manager develop a case plan to help stabilize the client and create a path to increased selfsufficiency. Case managers specialize in providing the following services: housing (through the housing first program and other subsidies such as section 8 and veterans affairs supportive housing), substance abuse, government benefits including public health insurance programs, physical and mental health, jail release planning, and assistance with money management through a representative payee program. During the year, the organization served 325 patients and provided 19,314 services.
$2,789,256 spent$849,266 earned by the program32% of program spendingBehavorial healththe center provides behavioral health services including mental health and substance abuse counseling and psychiatric medicine management. The behavioral health program works in an integrated and holistic manner with the center's medical and case management programs. This multi-disciplinary team of professionals makes up the center's behavioral wellness education and life learning (bwell) team. The bwell team meets weekly to create and update holistic treatment plans for patients with complex needs. During the year, the organization served 955 patients and provided 12,386 visits.
$1,995,712 spent$1,222,508 earned by the program23% of program spendingFood pantrythe center maintains the largest food pantry in marin county. Over the last few years, the center has distributed an average of more than 20,000 bags of groceries to over 3,000 households per year. The pantry serves both housed and homeless clients with nutritious supplementary food items on a weekly basis. The majority of the pantry's food is delivered by the san francisco/marin food bank with smaller contributions from stores and individuals in the community. Improved reporting processes (validated by sf/marin food bank and usda compliance). Increased volunteer participation and food donations from multiple organizations. Our leadership in numerous community events throughout the year. During the year, the organization served 1,799 patients and provided 12,853 visits. Day service centerthe day service center is a clean, safe and nurturing environment primarily for use by persons who are homeless. The center provides emergency medically necessary showers, hygiene supplies, laundry facilities, and restrooms. Our reporting is now solid, and we've built strong partnerships that enhance both service delivery and compliance. The upward trend in unique clients demonstrates…
$300,877 spent$22,518 earned by the program3% of program spending
The 4 programs described on its FY2024 Form 990, listed largest first by expense. Program spending in total: $8,821,820.
The organization over time
Each line starts at 100 in 2018, so what you read is the shape rather than the size: 150 means half as much again as 2018, 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 2022 to 2023, from $5.7M to $14M (+143%).
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: 2018 43% · 2019 55% · 2020 58% · 2021 68% · 2022 55% · 2023 49% · 2024 45% · 2025 37%. Grants only. Government contracts and fees sit inside program revenue.
75% of RITTER CENTER’s revenue is contributions — more donation-reliant than the typical peer (21% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 0 of the last 8 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
Mark Shotwell
CEO
As listed on its FY2025 Form 990.
Who funds it, year by year
2017 → 2023: the base broadened from 16 funders to 26 funders, grant income rose $546k → $1.9M.
11 of 70 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 32% 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 RITTER CENTER’s funders (the co-funder graph). Top 30 of 70 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
RITTER CENTER leans on a few funders — its largest provides 39% of grant income and the top three 66%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
73% 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 RITTER CENTER.
Largest funder’s share by year: 2017 64% · 2018 65% · 2019 70% · 2020 45% · 2021 43% · 2022 43% · 2023 72% — growing more concentrated.
“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
34% of RITTER CENTER's funders are still giving 3 years after their first grant; 57% 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
RITTER CENTER draws 71% of its grant income from funders outside California, across 18 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $2.9M arriving through sponsors registered in 8 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
RITTER CENTER runs a healthier operating margin than three-quarters of the 2,396 human services nonprofits its size.
this organization peer median middle 50% of peers· 2,396 human services nonprofits $10M–$100M, FY2025
Government funding RITTER CENTER receives
Grants and contracts to this organization from federal (USASpending) and state checkbooks, reconciled to its EIN. $18.5M on record.
- Department of Health and Human Services$16.5M
- Department of Housing and Urban Development$2.0M
Federal grants vs contracts are distinguished; state line items keep their reported category. Matched by name + geography (the BMF), so coverage is partial and precision-first.
Organizations like RITTER CENTER
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
83% of spending goes to programs.
Governance
Public support
93%
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 RITTER CENTER: 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 RITTER CENTER?
- RITTER CENTER (California) receives grants from 70 organizations whose IRS filings report $9,222,004 to it, the largest being LEONARD & BERYL BUCK FOUNDATION ($3,565,250). 40 of them have funded it in more than one year.
- How many funders does RITTER CENTER have?
- IRS filings report 70 organizations giving $9,222,004 in grants to RITTER CENTER, 40 of which have funded it in more than one year.
- Who is the largest funder of RITTER CENTER?
- LEONARD & BERYL BUCK FOUNDATION is the largest funder on record, with $3,565,250 in grants. The full list of funders is on this page.
- How can an organization like RITTER CENTER 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 Ritter Center →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2018–2025), and the filings of 70 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