| Aristoi Classical Academy Inc | 501(c)(3) | 1996 | $18.4 million | $21.1 million | 2025-08 |
| Election Center | 501(c)(3) | 1992 | $5 million | $5 million | 2024-12 |
| Calvin Nelms Charter High School | 501(c)(3) | 1999 | $4.3 million | $5.8 million | 2025-08 |
| Berean Christian Academy Inc | 501(c)(3) | 2016 | $3.3 million | $4.1 million | 2025-06 |
| Humane Intelligence Inc | 501(c)(3) | 2024 | $1.5 million | $558,164 | 2025-12 |
| Bible Seminary | 501(c)(3) | 2010 | $1 million | $362,448 | 2025-05 |
| Peace Gospel International | 501(c)(3) | 2001 | $912,322 | $234,289 | 2025-12 |
| Katy Classical Academy | 501(c)(3) | 2015 | $831,497 | $188,420 | 2025-06 |
| Katy Isd Education Foundation Inc | 501(c)(3) | 2011 | $775,733 | $1.8 million | 2025-08 |
| Seven Lakes High School Band Boosters Inc | 501(c)(3) | 2006 | $592,242 | $352,807 | 2025-05 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $540,595 | $211,159 | 2025-06 |
| Seven Lakes High School Athletic Booster Club | 501(c)(3) | 2017 | $445,911 | $465,004 | 2026-05 |
| Childs Play Learning Center Inc | 501(c)(3) | 2001 | $393,708 | $551,557 | 2024-12 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $376,055 | $220,285 | 2026-05 |
| Bengal Brigade & Cheerleader Booster Club of Katy High School | 501(c)(3) | 2013 | $309,560 | $48,007 | 2025-12 |
| Cinco Ranch High School Band Boosters Inc | 501(c)(3) | 2002 | $290,237 | $292,812 | 2025-06 |
| James E Taylor Band Boosters | 501(c)(3) | 2004 | $285,677 | $1,976 | 2025-05 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $268,740 | $180,374 | 2025-05 |
| The James E Taylor High School Athletic Booster Club Inc | 501(c)(3) | 2005 | $257,475 | $203,654 | 2026-05 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $231,220 | $50,819 | 2025-06 |
| Veritas Montessori Academy | 501(c)(3) | 2019 | $226,335 | $68,024 | 2025-12 |
| Katy High School Band Booster Association | 501(c)(3) | 2012 | $174,928 | $102,177 | 2024-06 |
| Pacesetter Booster Club | 501(c)(3) | 2015 | $171,790 | $21,325 | 2026-04 |
| Cypress Lakes Athletic Booster Club | 501(c)(3) | 2009 | $158,184 | $45,241 | 2025-06 |
| Rams Club Inc | 501(c)(3) | 2014 | $155,677 | $94,544 | 2025-12 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $151,504 | $95,083 | 2025-06 |
| Morton Ranch High School Athletic Booster Club | 501(c)(3) | 2004 | $150,192 | $49,181 | 2026-05 |
| Studio VII Booster Club | 501(c)(3) | 2006 | $133,933 | $58,708 | 2025-06 |
| Seven Lakes High School Sapphires Booster Club | 501(c)(3) | 2014 | $122,127 | $56,712 | 2025-05 |
| Paetow - Stockdick Band Booster Organization | 501(c)(3) | 2025 | $121,204 | $68,158 | 2026-06 |
| Pta Texas Congress | 501(c)(3) | 1967 | $112,866 | $47,523 | 2026-06 |
| Katy Theatre Arts Booster Club | 501(c)(3) | 2016 | $107,906 | $32,131 | 2025-06 |
| British International School of Houston Parent Teacher Organizatio | 501(c)(3) | 2023 | $105,767 | $52,396 | 2025-06 |
| Cinco Ranch High School Drill Team Booster Club | 501(c)(3) | 2001 | $101,128 | $76,417 | 2026-05 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $96,143 | $47,687 | 2025-06 |
| Katy Rotary Fund | 501(c)(3) | 1998 | $92,259 | $217,444 | 2025-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $91,843 | $3,766 | 2026-06 |
| Seven Lakes High School Choir Booster Club | 501(c)(3) | 2006 | $89,844 | $33,215 | 2025-06 |
| Corps of Cadets Aggie Moms | 501(c)(3) | 2018 | $85,476 | $37,791 | 2026-05 |
| Katy Elementary School Parent Teacher Organization | 501(c)(3) | 2003 | $84,105 | $104,229 | 2024-06 |
| Tompkins Speech and Debate Booster | 501(c)(3) | 2024 | $77,563 | $97,354 | 2025-12 |
| Friends of Lindsey | 501(c)(3) | 2018 | $75,869 | $37,796 | 2025-06 |
| Taylor Ffa Booster Club | 501(c)(3) | 2014 | $74,308 | $62,731 | 2025-04 |
| Andrew J Willis Ministries | 501(c)(3) | 2026 | $74,232 | $19,034 | 2021-12 |
| Katy Choir Booster Club | 501(c)(3) | 2007 | $63,877 | $51,647 | 2025-06 |
| Pta Texas Congress | 501(c)(3) | 1967 | $61,826 | $44,993 | 2026-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $60,436 | $50,069 | 2026-06 |
| Pta Texas Congress | 501(c)(3) | 1967 | $57,816 | $33,237 | 2026-06 |
| CRHS Choir Booster Club | 501(c)(3) | 2000 | $56,490 | $21,636 | 2026-06 |
| Seven Lakes High School Orchestra | 501(c)(3) | 2007 | $53,214 | $58,336 | 2025-06 |
| Dental Class of 2028 | 501(c)(3) | 2025 | $53,170 | $53,170 | 2025-12 |
| KHS Ffa Booster Club Inc | 501(c)(3) | 2004 | $50,066 | $85,966 | 2025-07 |
| Pta Texas Congress | 501(c)(3) | 1967 | $49,787 | $41,905 | 2026-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $49,465 | $15,426 | 2026-06 |
| James E Taylor Choir Booster Club | 501(c)(3) | 2003 | $43,873 | $7,867 | 2026-06 |
| Aristoi Booster Club | 501(c)(3) | 2018 | $43,138 | $107,098 | 2025-06 |
| Cinco Ranch High School Robotics Booster Club | 501(c)(3) | 2002 | $42,188 | $162,486 | 2026-06 |
| National Institute for Career Mobil Ity | 501(c)(3) | 2026 | $33,182 | $359 | 2025-12 |
| Pta Texas Congress | 501(c)(3) | 1967 | $27,360 | $67,417 | 2025-06 |
| Youth Leadership Development Program of Houston | 501(c)(3) | 2012 | $19,102 | $53,751 | 2025-12 |
| Bit Sindri Association International | 501(c)(3) | 2015 | $11,814 | $185,059 | 2025-12 |
| Baby 1-2-3 Daycare | 501(c)(3) | 2022 | $10,371 | $1 | 2024-12 |
| Ned Alumni Endowment Fund | 501(c)(3) | 2023 | $7,752 | $267,998 | 2025-12 |
| Olt Foundation Limited | 501(c)(3) | 2026 | $1,450 | $7 | 2025-12 |
| 7LHS Speech and Debate Booster Club | 501(c)(3) | 2023 | $0 | $0 | 2026-06 |
| A Stretch of Faith Ministries Inc | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| African-American Honor Society | 501(c)(3) | 2025 | | | |
| Altoz Institute of Healthcare and Technology | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| American Blue Economy & Innovation Association | 501(c)(3) | 2026 | | | |
| Amigos Unidos En Accion | 501(c)(3) | 2012 | $0 | $0 | 2024-12 |
| Aoaz Inc | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| Artsplosions Multicultural Enrichment Camps | 501(c)(3) | 2020 | $0 | $0 | 2024-12 |
| Ashleigh Langbein Project Inc | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Audiobvi Education | 501(c)(3) | 2024 | | $1 | 2024-12 |
| Babsfoundation | 501(c)(3) | 2022 | $0 | $0 | 2025-10 |
| Beck Backstage Boosters | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Bengal Lancer Alumni Foundation Inc | 501(c)(3) | 2016 | | $53,731 | 2024-12 |
| Better Together Homeschool Community of Katy West Inc | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Bhupat and Jyoti Mehta Family Foundation | 501(c)(3) | 1998 | | $34.2 million | 2025-09 |
| Biscuit Robotics | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Blazer Parent Association | 501(c)(3) | 2024 | $0 | $0 | 2025-06 |
| Blue Posse Buyers Group | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Borrachos | 501(c)(3) | 2024 | $0 | $0 | 2026-02 |
| Branches of Success Foundation | 501(c)(3) | 2025 | | | |
| C&W Funds Corp | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| C2L Foundation | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Chance Program | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Chapters of Change | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Charlene Crossley International School | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Cinco Ranch High School Ffa Booster Club | 501(c)(3) | 2009 | $0 | $0 | 2026-08 |
| Codecoogs | 501(c)(3) | 2026 | | | |
| Coding for Education Project | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Corazones of Courage Foundation | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Crosslink Ikigai | 501(c)(3) | 2026 | | | |
| Cypress Lakes Sterling Stars Booster Club | 501(c)(3) | 2017 | $0 | $0 | 2025-06 |
| Cypress Springs Arc Academy Booster Club | 501(c)(3) | 2022 | $0 | $0 | 2024-07 |
| Deborah - David Care Aide Network | 501(c)(3) | 2024 | | | |
| Digital Intelligence for Humanity | 501(c)(3) | 2026 | | | |
| Disability Parents Association | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Domus Family | 501(c)(3) | 2026 | | | |
| Education Made Simple | 501(c)(3) | 2022 | $0 | $0 | 2023-12 |
| Eduthera | 501(c)(3) | 2024 | | $1 | 2024-12 |
| Elf Foundation NFP | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Estampea Academy | 501(c)(3) | 2026 | | | |
| Eureka Institute | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Every County Counts | 501(c)(3) | 2026 | | | |
| First Things First | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Friend of Tamarron Elementary | 501(c)(3) | 2022 | $0 | $0 | 2026-06 |
| Friends of Katy High School | 501(c)(3) | 2006 | $0 | $0 | 2025-06 |
| Friends of Katy Isd Ffa Inc | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Future Female Scholars | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Generations Group | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Grow and Glow Initiative | 501(c)(3) | 2026 | | | |
| Gulf Coast Association of Pupil Transportation | 501(c)(3) | 2025 | $0 | $0 | 2025-08 |
| Hardship Scholarships & Book Fund Inc | 501(c)(3) | 2008 | $0 | $0 | 2024-12 |
| Haskett Junior High Orchestra Booster | 501(c)(3) | 2023 | $0 | $0 | 2025-06 |
| Hat Foundation Inc | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Hearts for Learning | 501(c)(3) | 2026 | | | |
| Hoffman-Alfaro Scholarship Fund | 501(c)(3) | 2026 | | | |
| Houston Mydream | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Hse Katy Pto Inc | 501(c)(3) | 2025 | $0 | $0 | 2025-05 |
| Humanity Resources Inc | 501(c)(3) | 2000 | | $3,766 | 2025-12 |
| I Am Esperanza Foundation | 501(c)(3) | 2018 | $0 | $0 | 2026-06 |
| Infotech Impact Inc | 501(c)(3) | 2024 | $0 | $0 | 2023-12 |
| Institute for Counselor Certification Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-12 |
| International Leadership of Texas - Katy Pto | 501(c)(3) | 2016 | $0 | $0 | 2025-06 |
| Jean Davis Foundation for the Gifted and Dedicated | 501(c)(3) | 2022 | | $12,399 | 2024-12 |
| Jilin No1 High School North American Alumni Association | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Junior Academic Foundation | 501(c)(3) | 2026 | $0 | $0 | 2025-05 |
| Katy Area Rescue School | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Katy Association of Christian Homeschoolers | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Katy Creative Arts Parent Teacher Organization | 501(c)(3) | 2004 | $0 | $0 | 2024-08 |
| Katy High Orchestra Booster Association | 501(c)(3) | 2016 | $0 | $0 | 2025-06 |
| Katy Independent School District Athletic Hall of Honor | 501(c)(3) | 2017 | $0 | $0 | 2026-05 |
| Katy JH Band Boosters Association | 501(c)(3) | 2024 | $0 | $0 | 2026-06 |
| Katy Parents of Gifted & Talented Students Inc | 501(c)(3) | 2002 | $0 | $0 | 2025-06 |
| Khari Kares | 501(c)(3) | 2026 | | | |
| Kidz World Playcenter Inc | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Learn Ai Anywhere Inc | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Legacy Buyers Group | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Light Katy Inc | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Literacy Pathways | 501(c)(3) | 2025 | $0 | $0 | 2025-06 |
| Literacy Script | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| MRHS Orchestra Booster Organization | 501(c)(3) | 2014 | $0 | $0 | 2025-06 |
| Mad Stemvention | 501(c)(3) | 2025 | | | |
| Mawuli Fund | 501(c)(3) | 2001 | $0 | $0 | 2024-12 |
| Mecc Labs | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Memorial Parkway Junior High Band Boosters Association | 501(c)(3) | 2015 | $0 | $0 | 2024-06 |
| Memorial Parkway Orchestra Parent Association | 501(c)(3) | 2012 | $0 | $0 | 2024-06 |
| Mende Decendants Union-Houston Chiefdom Inc | 501(c)(3) | 2025 | | | |
| Morton Ranch High School Choir Boos Ter Club | 501(c)(3) | 2026 | | | |
| Msuevillage International | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Music No Boundaries | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Next Vox | 501(c)(3) | 2026 | | | |
| Nijaes Makes Ways | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Olsa NA Inc | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Owerri Girls Secondary School O G S S Alumnae Texas USA Inc | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Oye Educational Support Center | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| PHS Silver Strutters Booster Club Corporation | 501(c)(3) | 2024 | $0 | $0 | 2025-05 |
| Paetow HS Choir Booster Club | 501(c)(3) | 2023 | $0 | $0 | 2025-06 |
| Paetow High School Project Grad Project Prom | 501(c)(3) | 2019 | $0 | $0 | 2023-07 |
| Paetow Orchestra Booster Organization Inc | 501(c)(3) | 2023 | $0 | $0 | 2025-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | | | |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-08 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2026-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2026-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-05 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-05 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-12 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-07 |
| Pathways for Excellence Inc | 501(c)(3) | 2021 | $0 | $1 | 2025-12 |
| Pegram Family Foundation | 501(c)(3) | 2026 | | | |
| Precious Foundation | 501(c)(3) | 2026 | | | |
| Prodigy Education Partners | 501(c)(3) | 2019 | $0 | $0 | 2025-06 |
| Pta Texas Congress | 501(c)(3) | 1967 | $0 | $0 | 2026-06 |
| Pta Texas Congress | 501(c)(3) | 1967 | $0 | $0 | 2025-05 |
| Pta Texas Congress | 501(c)(3) | 1967 | $0 | $0 | 2026-06 |
| Rainbow Petroleum Club | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Randall Beckendorff Memorial Scholarship | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Reach 2 Teach Tutor Mentor Program | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Read Rise & Blossom Initiative | 501(c)(3) | 2026 | | | |
| Reenvision | 501(c)(3) | 2025 | $0 | $0 | 2026-03 |
| Rise Above Readi Educational Centers | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Rising To the Challenge | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Sam Brown 7on7 Scholarship Tournament Organization | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Schekinah Mentors International | 501(c)(3) | 2014 | $0 | $0 | 2026-05 |
| Seven Lakes Junior High Theatre Booster Club | 501(c)(3) | 2015 | $0 | $0 | 2026-06 |
| Sharon Love Community Outreach | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Shekinah Christian School Inc | 501(c)(3) | 2024 | | | |
| Shelter & Seed Initiative | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Shining Pathway Education and Health Foundation | 501(c)(3) | 2024 | | | |
| Silliman University General Alumni Registry | 501(c)(3) | 2005 | $0 | $0 | 2025-12 |
| Spartanics | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Sphere of Gratitude | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| St Margarets Old Girls Association Smoga NA Branch | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Steamlab | 501(c)(3) | 2026 | $0 | $0 | 2026-05 |
| Stemjump | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Stockie Foundation | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Syed Pillar | 501(c)(3) | 2023 | | $3,285 | 2025-12 |
| THS Mustang Cheer Booster Club | 501(c)(3) | 2025 | $0 | $0 | 2025-06 |
| TX Pi Alumni Society | 501(c)(7) | 2018 | $0 | $0 | 2025-12 |
| Talented and A-Students Foundation | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Taylor Orchestra Parent Association | 501(c)(3) | 2004 | $0 | $0 | 2026-06 |
| Tays Junior High Band Booster Club | 501(c)(3) | 2024 | $0 | $0 | 2025-05 |
| The Black Tide Educational Guild | 501(c)(3) | 2021 | $0 | $0 | 2024-12 |
| The Houston Embryology and Andrology Talent Collective | 501(c)(3) | 2025 | | | |
| The Marthannie School | 501(c)(3) | 2003 | $0 | $0 | 2026-06 |
| The Snapdragon Book Foundation | 501(c)(3) | 2008 | | $2.2 million | 2025-12 |
| Treasure Cove Preschool | 501(c)(3) | 2007 | | | |
| Txcpso Inc | 501(c)(3) | 2001 | $0 | $0 | 2026-05 |
| Udoalumnifoundationinc | 501(c)(3) | 2022 | $0 | $0 | 2023-12 |
| Unfinished International | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Usna Parents Club of the Texas Gulf Coast Inc | 501(c)(3) | 1999 | $0 | $0 | 2025-12 |
| Ust Alumni Association | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| Vaasi Foundation | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Valence 8 | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Valor University Inc | 501(c)(3) | 2025 | | | |
| Voices Initiative | 501(c)(3) | 2025 | $0 | $0 | 2025-08 |
| Willowfork Volunteer Fire Department | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Wiserighteous Network | 501(c)(3) | 2026 | | | |
| Youth Economics Initiative | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |