California · Nonprofit
OneReef Worldwide Stewardship
OneReef Worldwide Stewardship (California) receives grants from 19 organizations whose IRS filings report $6,186,145 to it, the largest being VANGUARD CHARITABLE ENDOWMENT PROGRAM ($1,925,000). 15 of them have funded it in more than one year.
- Revenue FY2025
- $2.3M
- Funders on record
- 19
- Grants received
- $6.2M
- Net assets
- $2.0M
What OneReef Worldwide Stewardship does
Mission
OneReefs mission is to ensure healthy ocean ecosystems and thriving coastal communities across the Pacific.
As stated on its FY2025 Form 990.
Program
OneReef has 3 main priorities: 1) invest in place-based stewardship in Micronesia by helping communities manage marine protected areas, restore mangroves, strengthen fisheries management, empower women, invest in youth learning traditional ocean knowledge, and monitor the health of coastal ecosystems;2) invest in people by training early-career environmental leaders in conservation practice, nonprofit management, project development, budgeting, reporting, grant writing, communications, and leadership skills; 3) invest in institutional capacity by supporting government agencies and local organizations with infrastructure, equipment, training, and connections to sustainable conservation financing. In 2025, OneReef delivered measurable impact at scale across the Pacific. The organization supported 59 communities across 7 countries, helping safeguard approximately 918,627 acres of marine areas and reaching more than 91,559 people directly and indirectly. Through the MiCOAST initiative and related programs, over 600 individuals were directly engaged in activities such as fisheries management, with 50 staff from partner organizations trained in gender equity and social inclusion, and 11…
$2,294,104 spentof which $1,560 as grants100% of program spending
The program described on its FY2025 Form 990. Program spending in total: $2,294,104.
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 2022 to 2023, from $1.9M to $3.6M (+91%).
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: 2020 9% · 2021 1% · 2022 6% · 2023 56% · 2024 4% · 2025 2%. Grants only. Government contracts and fees sit inside program revenue.
98% of OneReef Worldwide Stewardship’s revenue is contributions — more reliant on donations than three-quarters of its peers (74% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 3 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.
Board chair
John Dawson
Board Chair
As listed on its FY2025 Form 990.
Who funds it, year by year
2017 → 2023: the base broadened from 2 funders to 10 funders, grant income rose $83k → $1.4M.
7 of 19 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 48% 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 OneReef Worldwide Stewardship’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
OneReef Worldwide Stewardship leans on a few funders — its largest provides 31% of grant income and the top three 65%; 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 OneReef Worldwide Stewardship.
Largest funder’s share by year: 2017 76% · 2018 46% · 2019 50% · 2020 47% · 2021 51% · 2022 39% · 2023 29% — 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
40% of OneReef Worldwide Stewardship's funders are still giving 3 years after their first grant; 79% 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
OneReef Worldwide Stewardship draws 70% of its grant income from funders outside California, across 6 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $3.0M arriving through sponsors registered in 6 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
OneReef Worldwide Stewardship has grown faster than three-quarters of the 813 animals nonprofits its size.
this organization peer median middle 50% of peers· 813 animals nonprofits $1M–$10M, FY2025
Organizations like OneReef Worldwide Stewardship
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
73% of spending goes to programs.
Governance
Public support
47%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 1 state
Part of a family of 1 related entity
- OneReef Microneisa · exempt
Screen this organization
A dated, signed PDF of the compliance screen for OneReef Worldwide Stewardship: 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 OneReef Worldwide Stewardship?
- OneReef Worldwide Stewardship (California) receives grants from 19 organizations whose IRS filings report $6,186,145 to it, the largest being VANGUARD CHARITABLE ENDOWMENT PROGRAM ($1,925,000). 15 of them have funded it in more than one year.
- How many funders does OneReef Worldwide Stewardship have?
- IRS filings report 19 organizations giving $6,186,145 in grants to OneReef Worldwide Stewardship, 15 of which have funded it in more than one year.
- Who is the largest funder of OneReef Worldwide Stewardship?
- VANGUARD CHARITABLE ENDOWMENT PROGRAM is the largest funder on record, with $1,925,000 in grants. The full list of funders is on this page.
- How can an organization like OneReef Worldwide Stewardship 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 OneReef Worldwide Stewardship →
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 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 22, 2026. What this page cannot tell you · view filing