| Société d'économie mixte des transports publics de l'agglomération grenobloise | |
| Founded: | 13 February 1975 |
| Hq Location City: | Échirolles |
| Hq Location Country: | France |
| Key People: | Jean-Paul Trovéro (Président)[1] |
| Revenue: | 34 298 500 € (2016) |
| Net Income: | 274 600 € (2015) |
The SPL M Tag, previously known as Société d'économie mixte des transports publics de l'agglomération grenobloise (SÉMITAG) is a public company which operates since 1975, of behalf of the Syndicat Mixte des Mobilités de l'Aire Grenobloise (SMMAG), the entire bus and tramway network of the Grenoble-Alpes Métropole (M réso) with a population of over 440 000 spread over 49 municipalities for a surface area of 541 km2.