New York · Nonprofit
C40 Cities Climate Leadership Group Inc
C40 Cities Climate Leadership Group Inc (New York) receives grants from 29 organizations whose IRS filings report $126,534,624 to it, the largest being THE BLOOMBERG FAMILY FOUNDATION INC ($62,830,000). 14 of them have funded it in more than one year.
Against its field
C40 Cities Climate Leadership Group Inc is better cushioned than half of the 329 environment nonprofits its size.
this organization peer median middle 50% of peers· 329 environment nonprofits $10M–$100M, FY2024
Three funders worth looking at
Grantmakers with no record of funding this organization, ranked by how strongly the co-funder graph and the mission embeddings agree. The evidence is in section 03.
- Climate Imperative Foundationshared funders
- International Sustainable Energy Foundationportfolio match
- Grantham Foundation for the Protection of the Environmentportfolio match
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.
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 16% · 2019 24% · 2020 25% · 2021 18% · 2022 1% · 2023 18% · 2024 15%. Grants only. Government contracts and fees sit inside program revenue.
99% of C40 Cities Climate Leadership Group Inc’s revenue is contributions — more reliant on donations than three-quarters of its peers (88% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 1 of the last 7 reported years ran a deficit.
reserve
Who funds it, year by year
2017 → 2023: the base broadened from 1 funder to 8 funders, grant income rose $345k → $7.9M.
9 of 29 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 28% 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 C40 Cities Climate Leadership Group Inc’s funders (the co-funder graph). Top 28 of 29 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
C40 Cities Climate Leadership Group Inc leans on a few funders — its largest provides 50% of grant income and the top three 76%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
36% 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 C40 Cities Climate Leadership Group Inc.
Largest funder’s share by year: 2017 100% · 2018 71% · 2019 50% · 2020 66% · 2021 73% · 2022 72% · 2023 57% — 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
21% of C40 Cities Climate Leadership Group Inc's funders are still giving 3 years after their first grant; 48% 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
76% of C40 Cities Climate Leadership Group Inc's grant income comes from New York funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $35M arriving through sponsors registered in 5 statesis 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.
Funders to approach
Grantmakers that don’t fund you yet, surfaced two ways: they back organizations that share your funders, or their grantees resemble your mission. The ones both signals agree on come first. Your 29 funders put you under-funded among the 400 organizations that share them.
- Climate Imperative Foundationshared fundersCA · backs 75 organizations that share your funders
- International Sustainable Energy Foundationportfolio matchits grantees resemble your mission
- Grantham Foundation for the Protection of the Environmentportfolio matchits grantees resemble your mission
- Sequoia Climate Foundationportfolio matchits grantees resemble your mission
- Sea Change Foundationportfolio matchits grantees resemble your mission
- The Jeremy and Hannelore Grantham Environmental Trustportfolio matchits grantees resemble your mission
- Advocates for Climate Innovationportfolio matchits grantees resemble your mission
- V Kann Rasmussen Foundationportfolio matchits grantees resemble your mission
- The Sunrise Project Incportfolio matchits grantees resemble your mission
- Breakthrough Energy Foundationportfolio matchits grantees resemble your mission
- The Marisla Foundationshared fundersCA · backs 60 organizations that share your funders
- The Energy Foundationshared fundersCA · backs 93 organizations that share your funders
From the co-funder graph (funders backing at least two comparable organizations, shrunk for grantee count, donor-advised and mega-funds excluded) and the universe embeddings. A research starting point; overlap is association, not a guarantee of fit.
Organizations like C40 Cities Climate Leadership Group Inc
Nonprofits whose mission and program text most resemble this one, by semantic similarity over the universe of US filings — the closest peers, and often the clearest route to shared or prospective funders.
In New York
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
81% of spending goes to programs.
Governance
Public support
46%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 2 states
Part of a family of 4 related entities
- C40 Cities Climate Leadership UK · disregarded
- C40 Cities Climate Leadership South Africa · disregarded
- Foreningen C40 Cities Climate Ldrsp Dk · disregarded
- C40 Cities India Private Limited · disregarded
Screen this organization
A dated, signed PDF of the compliance screen for C40 Cities Climate Leadership Group Inc: 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. How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds C40 Cities Climate Leadership Group Inc?
- C40 Cities Climate Leadership Group Inc (New York) receives grants from 29 organizations whose IRS filings report $126,534,624 to it, the largest being THE BLOOMBERG FAMILY FOUNDATION INC ($62,830,000). 14 of them have funded it in more than one year.
- How many funders does C40 Cities Climate Leadership Group Inc have?
- IRS filings report 29 organizations giving $126,534,624 in grants to C40 Cities Climate Leadership Group Inc, 14 of which have funded it in more than one year.
- Who is the largest funder of C40 Cities Climate Leadership Group Inc?
- THE BLOOMBERG FAMILY FOUNDATION INC is the largest funder on record, with $62,830,000 in grants. The full list of funders is on this page.
- How can an organization like C40 Cities Climate Leadership Group Inc find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in New York. 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 FY2024 (financials across 2018–2024), and the filings of 29funders 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 August 27, 2026. What this page cannot tell you · view filing