| Portland Trail Blazers | National Basketball Association | Portland | 1970 | Veterans Memorial Coliseum, Moda Center |
| Potenza 84 | — | Potenza | — | — |
| Progresso Castel Maggiore | — | Castel Maggiore | — | — |
| Raggisolaris Faenza | — | Faenza | — | — |
| Real Sebastiani Rieti | Serie A2 Basket | Rieti | 2020 | — |
| Reyer Venezia Mestre | Serie A | Venice | 1925 | Palasport Taliercio |
| Reyer Venezia Mestre Femminile | — | Venice | 1925 | — |
| Riva del Garda Basket | — | Riva del Garda | — | — |
| Riviera Vado Basket | — | — | — | — |
| Robur Basket Osimo | — | Osimo | — | — |
| Robur et Fides Varese | — | Varese | — | — |
| Rovereto Basket | — | Rovereto | — | — |
| S.S. Basket Napoli | — | Naples | 1946 | PalaBarbuto |
| San Antonio Spurs | National Basketball Association | — | 1967 | Alamodome, Kay Bailey Hutchison Convention Center, HemisFair Arena, Fort Worth Convention Center, Frost Bank Center, Moody Coliseum, Lubbock Municipal Coliseum |
| San Martino di Lupari | — | — | — | — |
| Scafati Basket | Serie A | Scafati | 1969 | PalaMangano |
| Seattle SuperSonics | — | Washington | 1967 | Kingdome, Climate Pledge Arena, Tacoma Dome |
| Sebastiani Basket Club Rieti | — | — | — | — |
| Sheboygan Redskins | National Basketball Association | Sheboygan | 1938 | Playdium, Sheboygan Municipal Auditorium and Armory |
| Sisv Viterbo | — | Viterbo | — | — |
| Societa Veroli Basket | — | Frosinone | 1968 | — |
| Società Cestistica Mazzini | — | Bologna | — | — |
| Società Ginnastica Triestina | — | Trieste | 1930 | — |
| Spider Fabriano | — | — | — | — |
| Sport Club Alcamo | — | Alcamo | — | — |
| Sporting Club Gira | — | Bologna, Ozzano dell'Emilia | 1945 | — |
| SSD Santa Lucia Sport | — | Rome | 1978 | — |
| St. Louis Hawks | National Basketball Association | — | — | — |
| Starlight Valmadrera | — | — | — | — |
| Sutor Basket Montegranaro | — | Montegranaro | 1947 | Banca Marche Palace |
| Teramo Basket | Serie A2 Basket | Teramo | 1973 | PalaScapriano |
| Toronto Maple Leafs | — | — | 22 November 1917 | Scotiabank Arena, Mutual Street Arena, Maple Leaf Gardens |
| Toronto Raptors | National Basketball Association | Toronto | 1995 | Rogers Centre, Scotiabank Arena |
| U.S. Sangiorgese | — | — | — | — |
| Umana Venezia | — | — | 1925 | — |
| Unicar Cesena | — | Cesena | — | — |
| Unione Cestistica Casalpusterlengo | — | Casalpusterlengo | 1977 | PalaBanca |
| Unione Cestistica Piacentina | — | Piacenza | 2003 | — |
| Universo Treviso Basket | Serie A | Treviso | 2012 | Palaverde |
| USE Basket Femminile Empoli | — | Empoli | 1912 | — |
| Utah Jazz | National Basketball Association | Salt Lake City | 1974 | Municipal Auditorium, Caesars Superdome, Loyola Field House, Delta Center, Salt Palace, Thomas & Mack Center |
| Vancouver Grizzlies | National Basketball Association | — | 1995 | Rogers Arena |
| Verga Palermo | — | — | — | — |
| Victoria Libertas Pesaro | Serie A | Pesaro | 1946 | Vitrifrigo Arena |
| Virtus Basket Ariano | — | Ariano Irpino | — | — |
| Virtus Basket Spezia | — | La Spezia | — | — |
| Virtus Cagliari | — | Cagliari | — | — |
| Virtus Eirene Ragusa | — | Ragusa | — | — |