| Beta Omicron Alumni AssociationMemphis | Form 990-EZ | $78,576FY2025 |
| Liberty Creek Middle School PTOGallatin | Form 990-EZ | $78,547FY2025 |
| Youth Outreach in Science Technology Engineering and MathemaKnoxville | Form 990-EZ | $78,338FY2025 |
| Rutland Mars - Making All Rockets SoarMount Juliet | Form 990-EZ | $78,237FY2025 |
| Parent Booster USA IncBrentwood | Form 990-EZ | $78,169FY2026 |
| Tennessee High School Band BoostersBristol | Form 990-EZ | $78,006FY2026 |
| Smith County High School Owls Quarterback Club IncAlexandria | Form 990-EZ | $77,989FY2025 |
| Altrusa International Foundation IncOak Ridge | Form 990-EZ | $77,820FY2026 |
| Glamour Grooming Elite AcademyMemphis | Form 990-EZ | $77,664FY2025 |
| Soddy Daisy Band BoostersSoddy-Daisy | Form 990-EZ | $77,245FY2025 |
| Beech Elementary School Parent Teacher OrganizationHendersonville | Form 990-EZ | $77,144FY2026 |
| Greeneville City Schools FoundationGreeneville | Form 990-EZ | $77,100FY2025 |
| Allendale Elementary School PTOSpring Hill | Form 990-EZ | $76,746FY2026 |
| John Sevier Band AssociationKingsport | Form 990-EZ | $76,735FY2025 |
| Cyclone Touchdown ClubWatauga | Form 990-EZ | $76,601FY2025 |
| Grahamwood Parents Association IncMemphis | Form 990-EZ | $75,309FY2025 |
| Bethesda Elementary Parent Teacher OrganizationThompson's Station | Form 990-EZ | $75,021FY2026 |
| Nannie Berry Elementary Parent Teacher Org PTO Hendersonville TNHendersonville | Form 990-EZ | $74,986FY2025 |
| Idlewild Elementary School PTOMemphis | Form 990-EZ | $74,749FY2025 |
| Farragut High School Education Foundation IncKnoxville | Form 990-EZ | $74,390FY2026 |
| Roane County High School Band Boosters AssociationKingston | Form 990-EZ | $74,198FY2025 |
| Wildcat Touchdown ClubClarksville | Form 990-EZ | $74,162FY2025 |
| Riverton Homes for Elderly IncMorristown | Form 990 | $74,128FY2026 |
| Thompsons Station Elementary School PTOThompson's Station | Form 990-EZ | $73,499FY2026 |
| Sango Elementary PTOClarksville | Form 990-EZ | $73,436FY2026 |
| Mayme Carmichael School Organization IncorporatedOliver Springs | Form 990-EZ | $72,888FY2025 |
| Cuttington University Alumni Association in the Americas IncMemphis | Form 990-EZ | $72,376FY2025 |
| Thursday ConnectionKnoxville | Form 990-EZ | $71,559FY2024 |
| Riverdale School PTOGermantown | Form 990-EZ | $71,529FY2025 |
| Leadership Oak Ridge IncorporatedOak Ridge | Form 990-EZ | $71,432FY2024 |
| Columbia Gridiron Association IncColumbia | Form 990-EZ | $70,973FY2025 |
| Elizabethton Cyclone Dugout ClubElizabethton | Form 990-EZ | $70,638FY2025 |
| Smyrna High School Band BoostersSmyrna | Form 990-EZ | $70,452FY2025 |
| PTA Tennessee Congress of Parents & Teachers IncKingsport | Form 990-EZ | $69,165FY2026 |
| Farragut Middle School PTOKnoxville | Form 990-EZ | $69,156FY2026 |
| Heritage Elementary School PTOThompson's Station | Form 990-EZ | $68,606FY2025 |
| American Design & Drafting AssociationNewbern | Form 990-EZ | $68,515FY2024 |
| JCHS-TN Band BoostersDandridge | Form 990-EZ | $67,481FY2026 |
| Hickman County Education Foundation IncCenterville | Form 990 | $67,215FY2026 |
| Kids in TechnologyMemphis | Form 990-EZ | $66,984FY2024 |
| Chapmans Retreat Elementary PTOSpring Hill | Form 990-EZ | $66,492FY2025 |
| Seed International IncKnoxville | Form 990-EZ | $66,044FY2024 |
| Zeta Phi Fraternity House IncChattanooga | Form 990 | $65,657FY2020 |
| Lakeland Prep PTOLakeland | Form 990-EZ | $65,656FY2026 |
| United Athletes Foundation IncMemphis | Form 990-EZ | $65,620FY2024 |
| Tullahoma High School Basketball Booster ClubTullahoma | Form 990-EZ | $65,510FY2025 |
| Pi Gamma Gamma Foundation IncMurfreesboro | Form 990-EZ | $65,509FY2024 |
| East High Football Boosters ClubincMorristown | Form 990-EZ | $64,873FY2024 |
| Parent Teacher Student Organization of Centennial High School IncFranklin | Form 990-EZ | $64,659FY2026 |
| Brighton High School Baseball Booster ClubBrighton | Form 990-EZ | $64,522FY2025 |