| Basis Knights Boosters IncSan Antonio | Form 990 | $283,287FY2024 |
| Sachse High School Band Booster ClubSachse | Form 990 | $282,941FY2025 |
| Cowboy Heritage Association of Fort WorthFort Worth | Form 990 | $282,905FY2025 |
| Level LearningAustin | Form 990 | $282,737FY2025 |
| Argyle Isd Education Foundation IncArgyle | Form 990 | $282,511FY2025 |
| Education Foundation for Waxahachie Independent School DistrictWaxahachie | Form 990 | $282,357FY2025 |
| Association of Texas Small School BandsHouston | Form 990 | $282,096FY2025 |
| Elkins Band Booster ClubMissouri City | Form 990 | $281,129FY2025 |
| Mandarin Chinese Language Immersion Magnet School PTOHouston | Form 990 | $280,001FY2024 |
| Party in the Pines FoundationDallas | Form 990 | $279,964FY2024 |
| Terry Scholars FundHouston | Form 990 | $279,891FY2024 |
| Cleburne Isd Education FoundationCleburne | Form 990 | $279,393FY2024 |
| Claudia Taylor Johnson High School Band Parents AssociationSan Antonio | Form 990 | $279,374FY2025 |
| Taft Raider Band BoostersSan Antonio | Form 990 | $279,176FY2025 |
| Sil Lead IncDallas | Form 990 | $278,791FY2024 |
| Pin Oak Middle School PTO IncBellaire | Form 990 | $278,075FY2025 |
| International Society of Endovascular Specialists IncPearland | Form 990 | $277,473FY2024 |
| Montgomery Independent School District Education FoundationMontgomery | Form 990 | $277,448FY2025 |
| We Defend TruthAustin | Form 990 | $276,840FY2023 |
| Pearland Prancer Booster ClubPearland | Form 990 | $276,718FY2026 |
| Salado Independent School District Education Foundation IncorporatedSalado | Form 990 | $276,603FY2024 |
| Lake Pointe Elementary Parent Teacher Organization IncAustin | Form 990 | $276,540FY2026 |
| Texas Association of Supervisors of MathematicsConroe | Form 990 | $276,486FY2025 |
| Houston Institute of Global HealthHouston | Form 990 | $276,191FY2024 |
| Rockwall Rotary FoundationRockwall | Form 990 | $276,037FY2024 |
| Corsicana Isd Education Foundation IncCorsicana | Form 990 | $275,862FY2025 |
| Library Marketing Conference GroupAddison | Form 990 | $275,545FY2025 |
| Tomball Cougar Pride Band Booster Club IncTomball | Form 990 | $275,288FY2025 |
| Iapg Houston IncHouston | Form 990 | $274,933FY2024 |
| Ace Mentor Program of America IncHouston | Form 990 | $274,867FY2025 |
| Schertz Cibolo Universal City Isd Education FoundationSchertz | Form 990 | $273,896FY2025 |
| Langham Creek High School Band Booster ClubHouston | Form 990 | $273,631FY2025 |
| Foundation for a Globally Competitive TexasAustin | Form 990 | $273,418FY2025 |
| Gulf Coast Geological Library IncHouston | Form 990 | $273,306FY2025 |
| Inspire Community OutreachHumble | Form 990 | $272,799FY2024 |
| Israel-Texas Science and Education Foundation IncAustin | Form 990 | $272,785FY2024 |
| Funds for the Biblioteca Publica IncLaredo | Form 990 | $272,621FY2025 |
| Winners IncCarrollton | Form 990 | $272,615FY2025 |
| MNHS Band BoostersMcKinney | Form 990 | $270,891FY2026 |
| Private Schools Interscholastic Association IncorporatedLampasas | Form 990 | $270,831FY2025 |
| Corsicana Artist and Writer ResidencyCorsicana | Form 990 | $270,756FY2025 |
| The Locker FoundationGeorgetown | Form 990 | $270,662FY2024 |
| Executive Women International Business-Career-Development PrograSan Antonio | Form 990 | $270,053FY2025 |
| Houston Engineer Week CommiteeHouston | Form 990 | $269,783FY2025 |
| Wharton K-8 Dual Language Academy PTOHouston | Form 990 | $269,745FY2025 |
| Cisd Educational Support Groups IncSpring | Form 990 | $269,657FY2026 |
| Cedar Hill Isd Education Foundation IncCedar Hill | Form 990 | $269,012FY2025 |
| Texas Law Review AssociationAustin | Form 990 | $268,874FY2025 |
| Parent Booster USA IncKaty | Form 990 | $268,740FY2025 |
| Council of Presidents of the Public Senior Colleges & Universities TXAustin | Form 990 | $268,655FY2025 |