| Meade Recovery Services, LLC | 33 | 8 | 100% | Debt collection |
| Meadowbrook Financial Mortgage Bankers Corp. | 19 | 1 | 94.7% | Mortgage |
| Mechanics Bank | 554 | 106 | 100% | Vehicle loan or lease |
| Mechoopda Indian Tribe of Chico Rancheria | 10 | 8 | 80% | Payday loan, title loan, personal loan, or advance loan |
| Med-1 Solutions, LLC | 136 | 7 | 77.2% | Debt collection |
| MEDCAH, Inc. | 34 | 3 | 73.5% | Debt collection |
| Media Collections, Inc | 304 | 66 | 98% | Debt collection |
| Mediation Recovery Center | 110 | 38 | 98.2% | Debt collection |
| Medical & Professional Collection Services, Inc. NC. | 39 | 0 | 94.9% | Debt collection |
| Medical Business Bureau | 400 | 12 | 94% | Debt collection |
| Medical Business Consultants, Inc | 14 | 0 | 64.3% | Debt collection |
| Medical Data Systems, Inc. | 2,717 | 371 | 97.9% | Debt collection |
| Medical Financial Services, Inc. | 41 | 1 | 78% | Debt collection |
| Medical Recovery Services, LLC | 38 | 12 | 42.1% | Debt collection |
| Medical Society Business Services, Inc. | 234 | 0 | 91% | Debt collection |
| Medical-Commercial Audit Inc | 303 | 94 | 100% | Debt collection |
| Medical-Dental-Hospital Bureau of San Antonio | 72 | 1 | 86.1% | Debt collection |
| MedShield, Inc. | 10 | 0 | 100% | Debt collection |
| Mega Capital Funding Inc. | 21 | 7 | 100% | Mortgage |
| Megastar Financial Corp | 29 | 5 | 79.3% | Mortgage |
| Mei Auto Finance Inc | 118 | 44 | 97.5% | Vehicle loan or lease |
| Mel S. Harris and Associates, LLC | 37 | 0 | 89.2% | Debt collection |
| Melar Investments, LLC | 11 | 6 | 100% | Debt collection |
| Member First Mortgage, LLC | 36 | 8 | 91.7% | Mortgage |
| Mendelson Law Firm | 64 | 6 | 100% | Debt collection |
| Mercantile Adjustment Bureau, LLC | 668 | 15 | 100% | Debt collection |
| Mercari, Inc. | 106 | 50 | 100% | Money transfer, virtual currency, or money service |
| Mercedes Benz Financial Services | 2,963 | 780 | 99.5% | Credit reporting or other personal consumer reports |
| Merchants & Medical Adjustment Bureau, Inc. dba Credit Bureau Associates | 231 | 153 | 4.3% | Credit reporting or other personal consumer reports |
| Merchants Acceptance Corp | 122 | 41 | 99.2% | Debt collection |
| Merchants Adjustment Service, Inc. | 452 | 102 | 99.1% | Debt collection |
| Merchants and Medical Credit Corporation, Inc. | 546 | 89 | 99.5% | Debt collection |
| Merchants and Professional Bureau, Inc. | 295 | 2 | 99% | Debt collection |
| Merchants Automotive Group LLC | 10 | 2 | 50% | Vehicle loan or lease |
| Merchants Credit Assoc. Inc SC | 15 | 0 | 93.3% | Debt collection |
| Merchants Credit Bureau, Inc. | 95 | 19 | 76.8% | Debt collection |
| Merchants Credit Corporation | 153 | 6 | 96.7% | Debt collection |
| Merchants Credit LLC | 11 | 1 | 90.9% | Debt collection |
| Merchants Financial Guardian, Inc. | 10 | 0 | 80% | Debt collection |
| Merchants' Credit Guide Company | 716 | 24 | 99.7% | Debt collection |
| Mercury Financial Intermediate LLC | 307 | 156 | 100% | Credit card |
| Mercury Technologies, Inc. | 204 | 77 | 99.5% | Checking or savings account |
| Meridian ARG Inc. | 44 | 0 | 29.5% | Debt collection |
| Meridian Financial Services, Inc. | 499 | 142 | 92.8% | Debt collection |
| Meritize Financial Inc. | 61 | 40 | 98.4% | Student loan |
| Messerli & Kramer P.A. | 367 | 54 | 99.5% | Debt collection |
| Meta Payments Inc. | 224 | 161 | 95.5% | Money transfer, virtual currency, or money service |
| Metacorp LLC | 17 | 4 | 100% | Debt collection |
| Metro Area Collection Service, Inc. | 23 | 0 | 91.3% | Debt collection |
| Metro Collection Service Inc. | 156 | 26 | 96.8% | Debt collection |