California · Nonprofit
OPEN SOURCE WELLNESS
OPEN SOURCE WELLNESS (California) receives grants from 19 organizations whose IRS filings report $1,136,879 to it, the largest being THE CALIFORNIA WELLNESS FOUNDATION ($225,000). 5 of them have funded it in more than one year.
- Revenue FY2024
- $1.6M
- Funders on record
- 19
- Grants received
- $1.1M
- Net assets
- $1.1M
What Open Source Wellness does
Mission
Open Source Wellness (Agency) is a California public benefit corporation incorporated May 2016. The Agency will facilitate the basic practices of wellness, including, but not limited to, physical exercise, healthy food, stress reduction, and social connection. The mission is to make these practices accessible, enjoyable, and sustainable in clinical, community, and housing based settings. The Agency seeks to facilitate the adoption of healthy behavior patterns which will be sustained in lifestyle changes leading to improved health outcomes and the prevention of lifestyle related disease. While the Agency may operate in several different settings with different operating and financial models, the core offerings of physical movement, healthy meals, stress reduction, and social support remain consistent across contexts.
As stated on its FY2024 Form 990.
Program
We train primary care clinic staff to implement the Behavioral Pharmacy model, running Group Medical Visits (GMV) incorporating the four building blocks of health and wellness: movement, good food, stress reduction, and social support. Weekly events bringing together movement, stress reduction, a healthy plant based dinner, and social support. These programs serve participants referred from local Federally Qualified Health Centers (FQHCs) and have demonstrated significant reductions in hypertension and depression, as well as improvements in diet and exercise.
$916,399 spent$836,141 earned by the program100% of program spending
The program described on its FY2024 Form 990. Program spending in total: $916,399.
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 $457k to $1.1M (+140%).
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.
48% of OPEN SOURCE WELLNESS’s revenue is contributions — about as donation-reliant as the typical peer (81% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 2 of the last 6 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
Elizabeth Markle
Executive director
Board chair
Vivian Siegel
Board chair
As listed on its FY2024 Form 990.
Who funds it, year by year
2017 → 2023: the base broadened from 2 funders to 4 funders, grant income rose $20k → $111k.
4 of 19 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 7% 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 OPEN SOURCE WELLNESS’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
OPEN SOURCE WELLNESS has a broad base — no single funder exceeds 20% of grant income, and it takes 4 funders to reach half.
the vertical line marks half of all grant income — 4 funders to its left
54% 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 OPEN SOURCE WELLNESS.
Largest funder’s share by year: 2017 50% · 2018 74% · 2019 44% · 2020 49% · 2021 59% · 2022 84% · 2023 54% — 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
57% of OPEN SOURCE WELLNESS's funders are still giving 3 years after their first grant; 26% 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
63% of OPEN SOURCE WELLNESS's grant income comes from California funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $78k arriving through sponsors registered in 4 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
OPEN SOURCE WELLNESS runs a healthier operating margin than three-quarters of the 11,263 human services nonprofits its size.
this organization peer median middle 50% of peers· 11,263 human services nonprofits $1M–$10M, FY2024
Organizations like OPEN SOURCE WELLNESS
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
80% of spending goes to programs.
Governance
Public support
100%
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 OPEN SOURCE WELLNESS: 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 OPEN SOURCE WELLNESS?
- OPEN SOURCE WELLNESS (California) receives grants from 19 organizations whose IRS filings report $1,136,879 to it, the largest being THE CALIFORNIA WELLNESS FOUNDATION ($225,000). 5 of them have funded it in more than one year.
- How many funders does OPEN SOURCE WELLNESS have?
- IRS filings report 19 organizations giving $1,136,879 in grants to OPEN SOURCE WELLNESS, 5 of which have funded it in more than one year.
- Who is the largest funder of OPEN SOURCE WELLNESS?
- THE CALIFORNIA WELLNESS FOUNDATION is the largest funder on record, with $225,000 in grants. The full list of funders is on this page.
- How can an organization like OPEN SOURCE WELLNESS 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 Open Source Wellness →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2024 (financials across 2017–2024), and the filings of 19 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