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NTEE major group C
Environment Nonprofits
Givalgo Discover indexes 50 active US environment organisations recognised by the IRS as tax-exempt under section 501(c). The list below shows the largest by reported revenue on each org's most recent Form 990 filing. Click any row for the full Due Diligence profile — IRS status, Form 990 financials, governance flags, peer benchmarks, and auto-revocation history.
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Top 50 by reported revenue
From the most recent Form 990 indexed for each organisation. Click an org for full diligence detail.
| # | Organisation | Location | Revenue |
|---|---|---|---|
| 1 | NEW VENTURE FUND EIN 20-5806345 | WASHINGTON, DC | $662.4M |
| 2 | ENVIRONMENTAL DEFENSE FUND INCORPORATED EIN 11-6107128 | NEW YORK, NY | $443.3M |
| 3 | DUCKS UNLIMITED INC EIN 13-5643799 | MEMPHIS, TN | $380.3M |
| 4 | WORLD WILDLIFE FUND INC EIN 52-1693387 | WASHINGTON, DC | $366.7M |
| 5 | CENTER FOR SUSTAINABLE ENERGY EIN 33-0936366 | SAN DIEGO, CA | $335.6M |
| 6 | THE CONSERVATION FUND A NONPROFIT CORPORATION EIN 52-1388917 | ARLINGTON, VA | $329.4M |
| 7 | CONSERVATION INTERNATIONAL FOUNDATION EIN 52-1497470 | ARLINGTON, VA | $308.7M |
| 8 | WINDWARD FUND EIN 47-3522162 | WASHINGTON, DC | $308.2M |
| 9 | TRUST FOR PUBLIC LAND EIN 23-7222333 | SAN FRANCISCO, CA | $301.2M |
| 10 | SIXTEEN THIRTY FUND EIN 26-4486735 | WASHINGTON, DC | $282.2M |
| 11 | CLIMATE IMPERATIVE FOUNDATION EIN 84-5024713 | SAN FRANCISCO, CA | $271.7M |
| 12 | ISO NEW ENGLAND INC EIN 04-3372500 | HOLYOKE, MA | $264.6M |
| 13 | ENERGY TRUST OF OREGON INC EIN 93-1313663 | PORTLAND, OR | $251.2M |
| 14 | NATURAL RESOURCES DEFENSE COUNCIL INC EIN 13-2654926 | NEW YORK, NY | $248.9M |
| 15 | NATIONAL AUDUBON SOCIETY INC EIN 13-1624102 | NEW YORK, NY | $197.3M |
| 16 | EARTHJUSTICE EIN 94-1730465 | SAN FRANCISCO, CA | $170.8M |
| 17 | GREAT HEARTS AMERICA-TEXAS EIN 43-1973126 | SAN ANTONIO, TX | $148.6M |
| 18 | VERMONT ENERGY INVESTMENT CORP EIN 03-0304418 | WINOOSKI, VT | $130.9M |
| 19 | NEW YORK BOTANICAL GARDEN EIN 13-1693134 | BRONX, NY | $124.7M |
| 20 | MARSHALL AREA ECONOMIC DEVELOPMENT ALLIANCE EIN 46-1516144 | MARSHALL, MI | $119.3M |
| 21 | NATIONAL ARBOR DAY FOUNDATION EIN 23-7169265 | LINCOLN, NE | $111.9M |
| 22 | THANKSGIVING POINT INSTITUTE INC EIN 84-1416158 | LEHI, UT | $99.9M |
| 23 | SOCIAL AND ENVIRONMENTAL ENTREPRENEURS INC EIN 95-4116679 | CALABASAS, CA | $94.6M |
| 24 | FOUR LAKES TASK FORCE EIN 27-4698447 | MIDLAND, MI | $93.7M |
| 25 | URBAN LAND INSTITUTE EIN 53-0159845 | WASHINGTON, DC | $92.3M |
| 26 | RESOURCES LEGACY FUND EIN 95-4703838 | SACRAMENTO, CA | $79.6M |
| 27 | CLIMATE POWER EIN 92-2307261 | WASHINGTON, DC | $79.4M |
| 28 | PAINTCARE INC EIN 27-1354262 | WASHINGTON, DC | $77.1M |
| 29 | ATLANTA BOTANICAL GARDEN INC EIN 58-1313284 | ATLANTA, GA | $76.0M |
| 30 | LEAGUE OF CONSERVATION VOTERS EDUCATION FUND EIN 52-1379661 | WASHINGTON, DC | $75.2M |
| 31 | C40 CITIES CLIMATE LEADERSHIP GROUP INC EIN 90-0634376 | NEW YORK, NY | $73.6M |
| 32 | OPEN SPACE INSTITUTE LAND TRUST INC EIN 13-3028060 | NEW YORK, NY | $73.1M |
| 33 | NOKUSE EDUCATION INC EIN 65-1290397 | FREEPORT, FL | $70.9M |
| 34 | ALLIANCE TO END PLASTIC WASTE INC EIN 83-2463179 | AUSTIN, TX | $68.3M |
| 35 | CHICAGO HORTICULTURAL SOCIETY EIN 36-2225482 | GLENCOE, IL | $68.1M |
| 36 | SAVE THE REDWOODS LEAGUE EIN 94-0843915 | SAN FRANCISCO, CA | $68.1M |
| 37 | ALLIED CLIMATE PARTNERS INC EIN 93-2878604 | NEW YORK, NY | $66.5M |
| 38 | MULTIPLIER EIN 91-2166435 | SAN FRANCISCO, CA | $65.8M |
| 39 | DUCKS UNLIMITED INC EIN 91-2009004 | MEMPHIS, TN | $65.8M |
| 40 | HOLDFAST TR EIN 88-6574046 | JACKSON, WY | $63.3M |
| 41 | PENINSULA OPEN SPACE TRUST EIN 94-2392007 | PALO ALTO, CA | $62.3M |
| 42 | SUNRISE PROJECT INC EIN 87-2370083 | WILMINGTON, DE | $61.1M |
| 43 | MISSOURI BOTANICAL GARDEN BOARD OF TRUSTEES EIN 43-0666759 | SAINT LOUIS, MO | $61.0M |
| 44 | ELEVATE ENERGY EIN 36-4443093 | CHICAGO, IL | $60.9M |
| 45 | HUDSON HIGHLANDS FJORD TRAIL INC EIN 84-4261224 | POUGHKEEPSIE, NY | $60.1M |
| 46 | TRUSTEES OF RESERVATIONS EIN 04-2105780 | BOSTON, MA | $57.9M |
| 47 | MORTON ARBORETUM EIN 36-1505770 | LISLE, IL | $57.8M |
| 48 | FONDO MEXICANO PARA LA CONSERVACION DE LA NATURALEZA AC EIN 52-1945379 | MEXICO | $57.1M |
| 49 | MASSACHUSETTS AUDUBON SOCIETY INC EIN 04-2104702 | LINCOLN, MA | $56.2M |
| 50 | GOLDEN GATE NATIONAL PARKS CONSERVANCY EIN 94-2781708 | SAN FRANCISCO, CA | $54.7M |
Featured organizations
A representative cross-section beyond the revenue ranking — from national institutions to small community groups and private foundations — chosen for complete, recent IRS filings.
- RIVIAN FOUNDATIONIRVINE, CA · $100M–$1B in assets
- GREENACRES FOUNDATIONCINCINNATI, OH · $100M–$1B in assets
- KENNETH KIRCHMAN FOUNDATION INCSAINT CLOUD, FL · $100M–$1B in assets
- NATURE CONSERVATION TRDECATUR, IL · $100M–$1B in assets
- CHANTECAILLE FAMILY FOUNDATIONGREENWICH, CT · $100M–$1B in assets
- ALINE AND EDGAR IGLEHEART FOUNDATION INCEVANSVILLE, IN · $10M–$100M in assets
- MOORE-ODOM WILDLIFE FOUNDATION INCORANGE, TX · $10M–$100M in assets
- DUKE FARMS FOUNDATIONHILLSBOROUGH, NJ · $10M–$100M in assets
- NATIONAL WILD TURKEY FEDERATION INCEDGEFIELD, SC · $10M–$100M revenue
- IOWA NATURAL HERITAGE FOUNDATIONDES MOINES, IA · $10M–$100M revenue
- PELICAN COAST CONSERVANCY INCMOBILE, AL · $10M–$100M revenue
- DENVER BOTANIC GARDEN INCDENVER, CO · $10M–$100M revenue
- BONNEVILLE ENVIRONMENTAL FOUNDATIONPORTLAND, OR · $10M–$100M revenue
- GREAT BASIN INSTITUTERENO, NV · $10M–$100M revenue
- CLIMATE UNITED FUNDBETHESDA, MD · $10M–$100M revenue
- CENTER FOR INTERNATIONAL FORESTRY RESEARCHALEXANDRIA, VA · $10M–$100M revenue
- AMERICAN PRAIRIE FOUNDATIONBOZEMAN, MT · $10M–$100M revenue
- AMERICAN CONSERVATIONFLAGSTAFF, AZ · $10M–$100M revenue
- NATIONAL OUTDOOR LEADERSHIP SCHOOLLANDER, WY · $10M–$100M revenue
- SLIPSTREAM GROUP INCMADISON, WI · $10M–$100M revenue
- PENNSYLVANIA HORTICULTURAL SOCIETYPHILADELPHIA, PA · $10M–$100M revenue
- CENTER FOR ENERGY AND ENVIRONMENTMINNEAPOLIS, MN · $10M–$100M revenue
- PRODUCT CARE ASSOCIATIONCANADA · $10M–$100M revenue
- ELEMENTAL EXCELERATOR INCHONOLULU, HI · $10M–$100M revenue
- SERC RELIABILITY CORPORATIONCHARLOTTE, NC · $10M–$100M revenue
- NIA TERO FOUNDATIONSEATTLE, WA · $10M–$100M revenue
- COASTAL MAINE BOTANICAL GARDENS INCBOOTHBAY, ME · $10M–$100M revenue
- BADGER CREEK CORPORATIONSTILWELL, KS · $10M–$100M in assets
- COMPATIBLE LANDS FOUNDATION INCPRYOR, OK · $10M–$100M revenue
- PUERTO RICO CONSERVATION TRUSTSAN JUAN, PR · $10M–$100M revenue
- FORT CAMPBELL HISTORICAL FOUNDATION INCFORT CAMPBELL, KY · $10M–$100M revenue
- OMAHA BOTANICAL CENTER INCOMAHA, NE · $10M–$100M revenue
- VERMONT LAND TRUST INCMONTPELIER, VT · $10M–$100M revenue
- WATER INSTITUTE OF THE GULFBATON ROUGE, LA · $10M–$100M revenue
- ILLINOIS NO 3 FOUNDATIONARTESIA, NM · $10M–$100M in assets
- THE CARL SIEMON FAMILY CHARITABLE TRUSTMILTON MILLS, NH · $10M–$100M in assets
- CLOUDSLEDGE CONSERVATION TRUSTHOPE, ID · $10M–$100M in assets
- SKY FOUNDATIONWILMINGTON, DE · $1M–$10M in assets
- CENTER FOR CLIMATE INTEGRITYWASHINGTON, DC · $1M–$10M revenue
- MICHIGAN SAVES INCLANSING, MI · $1M–$10M revenue
- CUMBERLAND RIVER COMPACT INCNASHVILLE, TN · $1M–$10M revenue
- NEW ENGLAND FORESTRY FOUNDATION INCLITTLETON, MA · $1M–$10M revenue
- SAFE WATER NETWORKNEW YORK, NY · $1M–$10M revenue
- SOUTHFACE ENERGY INSTITUTE INCATLANTA, GA · $1M–$10M revenue
- ALASKA CONSERVATION FOUNDATIONANCHORAGE, AK · $1M–$10M revenue
- CANYONLANDS NATURAL HISTORY ASSOCIATIONMOAB, UT · $1M–$10M revenue
- MICRONESIA CONSERVATION TRUSTPOHNPEI, FM · $1M–$10M revenue
- CONATA CONSERVATION TRUSTSCENIC, SD · $1M–$10M in assets
- GULF OF MEXICO ALLIANCEOCEAN SPRINGS, MS · $1M–$10M revenue
- MISSOURI CONSERVATION HERITAGE FOUNDATIONJEFFERSON CTY, MO · $1M–$10M revenue
- HOPE IN THE HILLS INCORPORATEDHUNTINGTON, WV · $1M–$10M revenue
- SAVE THE BAY INCPROVIDENCE, RI · $1M–$10M revenue
- TURPENTINE CREEK FOUNDATION INCEUREKA SPGS, AR · $1M–$10M revenue
- THEODORE ROOSEVELT NATURE AND HISTORY ASSOCIATIONMEDORA, ND · $100K–$1M revenue
- CHRISTENSEN FUNDSAN FRANCISCO, CA · $100M–$1B in assets
- WESTERN RESERVE LAND CONSERVANCYMORELAND HLS, OH · $10M–$100M revenue
- MDS FAMLY FOUNDATION INCMAITLAND, FL · $100M–$1B in assets
- LAKE FOREST OPEN LANDS ASSOCIATIONMETTAWA, IL · $1M–$10M revenue
- OCEAN EXPLORATION TRUST INCNEW LONDON, CT · $10M–$100M revenue
- COFFEE CREEK WATERSHED CONSERVANCY INCCHESTERTON, IN · $1M–$10M in assets
Frequently asked questions about Environment nonprofits
Answers compiled from the IRS Form 990, BMF, Pub 78, and Auto-Revocation List.
Frequently asked questions about Environment nonprofits
Answers compiled from the IRS Form 990, BMF, Pub 78, and Auto-Revocation List.
- What counts as a Environment nonprofit?
- Environment nonprofits are US tax-exempt organisations classified under the IRS National Taxonomy of Exempt Entities (NTEE) major group "C" (Environment). The IRS assigns the NTEE code based on the organisation's primary purpose as reported on Form 990.
- How are environment nonprofits regulated?
- Environment nonprofits with annual gross receipts of $50,000 or more must file Form 990 (or 990-EZ) annually with the IRS. Smaller orgs file the 990-N e-Postcard. Failure to file for three consecutive years triggers automatic revocation of tax-exempt status.
- How can I verify a environment nonprofit's tax-exempt status before granting?
- Cross-reference the organisation against the IRS Auto-Revocation List AND IRS Publication 78. Pub 78 confirms whether donations are tax-deductible; the Auto-Revocation List confirms whether the org has lost its status for non-filing. Givalgo Discover surfaces both signals on every org profile.
- Where can I find Form 990 data for environment nonprofits?
- Each organisation's Form 990 — including financials, governance, programs, and grants — is publicly available from the IRS. Givalgo Discover aggregates the full corpus (Form 990, 990-EZ, 990-PF, 990-N) and provides a free profile for every IRS-registered environment nonprofit.
- What's the difference between a 501(c)(3), 501(c)(4), and 501(c)(6)?
- 501(c)(3) is the standard tax-exempt classification for public charities and private foundations; contributions are tax-deductible. 501(c)(4) covers civic-league / social-welfare orgs; contributions are not deductible. 501(c)(6) covers business leagues and chambers of commerce. The IRS subsection code on each Givalgo Discover profile identifies the exact classification.