| Indianapolis Olympians | National Basketball Association | Indianápolis | 1949 | Hinkle Fieldhouse |
| Ivrea Basket Team | — | Ivrea | — | — |
| JesoloSandonà Basket | — | Jesolo | — | — |
| Junior Casale Monferrato | — | Casale Monferrato | 1956 | — |
| Juvecaserta Basket | Liga Italiana de Basquetebol, Serie B | Castel Morrone | 1951 | PalaMaggiò |
| Juventus Basket Pontedera | — | — | — | — |
| Juvi Cremona Basket | — | — | — | — |
| Latina Basket | — | Latina | 1968 | — |
| Legnano Knights | — | Legnano | 1966 | — |
| Libertas Basket Bologna | — | Bolonha | — | — |
| Libertas Liburnia Basket Livorno | — | Livorno | — | — |
| Libertas Livorno | — | Livorno | 1 de novembro de 1947 | — |
| Libertas Pallacanestro Asti | — | — | 1954 | — |
| Libertas Pallacanestro Livorno | — | Livorno | 1991 | — |
| Lions Basket | — | — | — | — |
| Los Angeles Clippers | National Basketball Association | Los Angeles | 1970 | Maple Leaf Gardens, Buffalo Memorial Auditorium, Los Angeles Memorial Sports Arena, Pechanga Arena, Crypto.com Arena |
| Magika Pallacanestro | — | Castel San Pietro Terme | — | — |
| Magnolia Basket Campobasso | — | Campobasso | 2017 | — |
| Maurolico Messina | — | — | — | — |
| Maxima Roma | Liga Italiana de Basquetebol | — | 2026 | PalaLottomatica |
| Memphis Grizzlies | National Basketball Association | Memphis | 1995 | Pyramid Arena, FedExForum |
| Mercede Basket Alghero | — | Alghero | 1977 | — |
| Meyana Mesagne | — | Mesagne | — | — |
| Miami Heat | National Basketball Association | Miami | 1988 | Miami Arena, Kaseya Center |
| Milwaukee Bucks | National Basketball Association | Milwaukee | 1968 | UW–Milwaukee Panther Arena, Bradley Center, Fiserv Forum |
| Minnesota Timberwolves | National Basketball Association | Minneapolis | 1989 | Hubert H. Humphrey Metrodome, Target Center |
| Modena Basket | — | — | — | — |
| Montigarda Basket | — | Montichiari | — | — |
| MTVB Herons Basket | — | Montecatini Terme | — | — |
| Napoli Basket | Liga Italiana de Basquetebol | Nápoles | 2016 | PalaBarbuto |
| Napoli Basket Vomero | — | Nápoles | 1986 | — |
| Napoli Basketball | — | Nápoles | 2011 | — |
| New Basket Palestrina | — | — | — | — |
| New Orleans Pelicans | National Basketball Association | Nova Orleães | 2002 | Paycom Center, Smoothie King Center |
| New Polibasket San Bonifacio | — | — | — | — |
| New York Knicks | National Basketball Association | Nova Iorque | 1946 | Madison Square Garden, Madison Square Garden, 69th Regiment Armory |
| Nova Virtus Ragusa | — | Ragusa | — | — |
| NPC Rieti | — | Rieti | 2011 | — |
| Nuova AMG Sebastiani Basket Napoli | — | Rieti | 1946 | — |
| Nuova Pallacanestro Vigevano | — | Vigevano | 1955 | — |
| OBG Roma | — | — | — | — |
| Oklahoma City Thunder | National Basketball Association | Oklahoma City | 2008 | Climate Pledge Arena, Tacoma Dome, Paycom Center, Kingdome |
| Olimpia Basket Pistoia | — | Pistoia | 1965 | — |
| Olimpia Cagliari | — | Cagliari | 1953 | — |
| Olimpia Milão | Liga Italiana de Basquetebol | Milão | 1936 | Mediolanum Forum |
| Oratorio Elmas | — | — | — | — |
| Orlandina Basket | — | Capo d'Orlando | 1978 | PalaFantozzi |
| Orlando Magic | National Basketball Association | Orlando | 1989 | Amway Arena, Kia Center |