Organizations
Largest first
By revenue on the last return. Organizations that file Form 990-N report no figures and come last.
| Organization | Return | Revenue |
|---|---|---|
| Great Hearts America-TexasSan Antonio | Form 990 | $148,570,155FY2025 |
| Alliance to End Plastic Waste IncAustin | Form 990 | $68,296,509FY2024 |
| Dallas Arboretum & BotanicalDallas | Form 990 | $32,226,986FY2024 |
| Buffalo Bayou PartnershipHouston | Form 990 | $31,042,524FY2024 |
| International Sustainable Energy FoundationAustin | Form 990 | $30,080,227FY2024 |
| Texas Agricultural Land TrustSan Antonio | Form 990 | $27,757,205FY2025 |
| Coastal Conservation AssociationHouston | Form 990 | $27,690,958FY2024 |
| Memorial Park Conservancy IncHouston | Form 990 | $22,029,272FY2025 |
| Galveston Bay FoundationKemah | Form 990 | $20,190,335FY2024 |
| Coastal Prairie ConservancyHouston | Form 990 | $19,899,793FY2024 |
| Parks and Wildlife Foundation of Texas IncDallas | Form 990 | $19,863,309FY2024 |
| Hermann Park ConservancyHouston | Form 990 | $15,541,142FY2025 |
| Coastal Bend Bays & Estuaries ProgramCorpus Christi | Form 990 | $12,571,252FY2025 |
| San Antonio Botanical Garden Society IncSan Antonio | Form 990 | $10,925,330FY2025 |
| Fossil Rim Wildlife Center IncGlen Rose | Form 990 | $8,339,695FY2025 |
| Armand Bayou Nature Center IncHouston | Form 990 | $7,828,019FY2024 |
| Houston Botanic GardenHouston | Form 990 | $7,644,996FY2024 |
| Hill Country Conservancy IncAustin | Form 990 | $7,443,901FY2025 |
| Timberview Farmstead IncFort Worth | Form 990 | $6,512,909FY2024 |
| Houston Audubon SocietyHouston | Form 990 | $5,268,352FY2025 |
| Pecan Street IncAustin | Form 990 | $5,254,430FY2025 |
| The Trail ConservancyAustin | Form 990 | $5,106,635FY2025 |
| Taking Care of TexasAustin | Form 990 | $5,048,857FY2024 |
| Friends of Cibolo WildernessBoerne | Form 990 | $4,887,948FY2024 |
| Houston Arboretum & Nature CenterHouston | Form 990 | $4,435,058FY2025 |
| Friends of the Katy Trail IncDallas | Form 990 | $4,396,640FY2024 |
| American Conservation Foundation IncGatesville | Form 990 | $4,333,955FY2025 |
| Vasudha Foundation USA IncSugar Land | Form 990 | $3,522,635FY2025 |
| Texas Water Foundation IncAustin | Form 990 | $3,267,331FY2025 |
| National Network of Abortion FundsAustin | Form 990 | $3,040,716FY2024 |
| Headwaters at the ComalNew Braunfels | Form 990 | $2,937,762FY2025 |
| Colorado River Land Trust IncDripping Springs | Form 990 | $2,927,001FY2025 |
| Switch Energy AllianceAustin | Form 990 | $2,791,239FY2025 |
| Great Springs Project IncAustin | Form 990 | $2,760,450FY2025 |
| National Network of Abortion FundsAustin | Form 990 | $2,672,331FY2025 |
| Houston Regional Monitoring CorporationBaytown | Form 990 | $2,651,083FY2024 |
| Wildlife Conservation InternationalAustin | Form 990 | $2,534,990FY2025 |
| Urban Harvest IncHouston | Form 990 | $2,382,221FY2025 |
| River Bend Nature WorksWichita Falls | Form 990 | $2,087,891FY2024 |
| National Network of Abortion FundsDallas | Form 990 | $2,056,027FY2025 |
| Air Alliance HoustonHouston | Form 990 | $1,955,204FY2025 |
| Ecorise Youth InnovationsAustin | Form 990 | $1,941,108FY2025 |
| San Antonio River FoundationSan Antonio | Form 990 | $1,940,609FY2025 |
| Artist Boat IncGalveston | Form 990 | $1,909,299FY2025 |
| Hill Country AllianceDripping Springs | Form 990 | $1,875,900FY2024 |
| Texas Land ConservancyAustin | Form 990 | $1,874,478FY2024 |
| Caddo Lake Institute IncKarnack | Form 990 | $1,723,329FY2025 |
| Keep Austin Beautiful IncAustin | Form 990 | $1,711,002FY2025 |
| Gardopia GardensSan Antonio | Form 990 | $1,612,349FY2025 |
| Willow Waterhole Greenspace Conservancy IncHouston | Form 990 | $1,603,461FY2024 |
1 to 50 of 1,214