| Metroplex Clinical Research Center | Academic & Science |
| Mass Communication Research Centre | Academic & Science |
| Murugappa Chettiar Research Centre | Academic & Science |
| Midland Core Research Center | Academic & Science |
| Massachusetts Capital Resource Company | Business |
| Millennium Capital and Recovery Corporation | Business |
| Management Control Review Committee | Business |
| Muslim Community Resource Center | Community |
| Middlebury College Rugby Club | Community |
| Mid Carolina Rifle Club | Community |
| Medina Community Recreation Center | Community |
| Manchester Community Resource Center | Community |
| Multicultural Community Resource Center | Community |
| Mennonite Congregational Resource Center | Community |
| Muslim Civil Rights Center | Community |
| Multipurpose Community Resource Center | Community |
| Metropolitan Community Resource Center | Community |
| Midshipmen Computer Repair Center | Computing |
| Marin Computer Resource Center | Computing |
| Midshipman Computer Repair Center | Computing |
| Malicious Code Research Center | Computing |
| Mission Course Resource Center | General |
| Maryland Consumer Rights Coalition | General |
| Mindful Change Remains Compassionate | General |
| Media Campaign Resource Center | General |
| Mediation And Conflict Resolution Center | General |
| Michigan Civil Rights Commission | General |
| Metropolitan Communications Recruiting Consortium | General |
| Manatee County Radio Controllers | General |
| Marine Corps Recruiting Command | General |
| Montgomery County Republican Committee | Governmental |
| Miami County Recovery Council | Governmental |
| Master Control and Reporting Center | Governmental |
| Monmouth County Reclamation Center | Governmental |
| Midland Children's Rehabilitation Center | Medical |
| metastatic Colorectal Cancer | Medical |
| Manchester Cancer Research Centre | Medical |
| Multi-disciplinary Clinical Research Center | Medical |
| Molecular Cardiology Research Center | Medical |
| Michigan Cancer Research Consortium | Medical |
| Monroe County Road Commission | Regional |
| Montgomery County | Regional |