Group
- Long Winter Publishing2
- Loras College1
- Lost Boy Productions2
- Lost Keg Adventurers1
- Ludis Citharoedus4
- Ludonaute4
- Lupis4216
- Lynnvander Studios40
- M Collective4
- MAMS Gaming59
- MEGA7
- MTG Pauper1
- MU Alumni Association1
- MU Skulls17
- Mackenzie's Marauders7
- Mad Gear Entertainment2
- Madison Under Siege4
- Mage & Sage4
- Mage Records1
- Magic Circle Games4