| Metropolitan Home Mortgage, Inc. | 23 | 0 | 69.6% | Mortgage |
| Meyer & Njus, P.A. | 26 | 0 | 96.2% | Debt collection |
| Mezcal Corporation | 14 | 6 | 100% | Credit reporting or other personal consumer reports |
| MFP, inc. | 39 | 0 | 46.2% | Debt collection |
| MIB Group, Inc. | 446 | 220 | 99.1% | Credit reporting or other personal consumer reports |
| Michael & Associates, PC | 28 | 1 | 96.4% | Debt collection |
| Michael Andrews & Associates LLC | 18 | 1 | 94.4% | Credit reporting, credit repair services, or other personal consumer reports |
| Michael G. Niles | 16 | 0 | 100% | Debt collection |
| Michael Harrison, Attorney at Law | 71 | 3 | 97.2% | Debt collection |
| Michael Haynes & Associates, LLC | 18 | 0 | 88.9% | Debt collection |
| Michael J Adams PC | 64 | 28 | 85.9% | Debt collection |
| Michael Wayne Investment | 46 | 15 | 97.8% | Vehicle loan or lease |
| Michel Law, LLC d/b/a Level One Law | 88 | 21 | 5.7% | Debt or credit management |
| Michigan Mutual, Inc. | 42 | 3 | 92.9% | Mortgage |
| MicroBilt / PRBC (formerly CL Verify) | 1,835 | 786 | 92.2% | Credit reporting or other personal consumer reports |
| Mid Continent Credit Services, Inc | 23 | 0 | 82.6% | Debt collection |
| Mid Florida Financing LLC | 67 | 24 | 100% | Credit reporting or other personal consumer reports |
| Mid-America Accounts Control Bureau, Inc. | 64 | 3 | 96.9% | Debt collection |
| Mid-Atlantic Consumer Services | 46 | 0 | 80.4% | Debt collection |
| Mid-Atlantic Finance Co., Inc. | 430 | 135 | 97.7% | Credit reporting or other personal consumer reports |
| Mid-Atlantic Solutions Holdings, LLC | 10 | 0 | 100% | Debt collection |
| Mid-Island Mortgage Corp. | 41 | 0 | 95.1% | Mortgage |
| Mid-Michigan Collection Bureau | 38 | 0 | 84.2% | Debt collection |
| Mid-Minnesota Management Services, Inc. | 16 | 0 | 100% | Debt collection |
| Mid-South Adjustment Co., Inc. | 136 | 34 | 96.3% | Debt collection |
| MidAmerica Mortgage Inc | 209 | 0 | 92.3% | Mortgage |
| Midcountry Financial Corp | 178 | 0 | 97.2% | Credit reporting, credit repair services, or other personal consumer reports |
| Middle Georgia Management Services | 28 | 0 | 89.3% | Credit reporting, credit repair services, or other personal consumer reports |
| Midfirst Bank | 1,837 | 305 | 99.9% | Mortgage |
| Midstate Collection Solutions, Inc. | 110 | 8 | 83.6% | Debt collection |
| Midway Resolution Services LLC | 22 | 0 | 50% | Debt collection |
| Midwest Acceptance Corp. | 73 | 14 | 97.3% | Vehicle loan or lease |
| Midwest Credit & Collection, Inc. | 87 | 6 | 98.9% | Debt collection |
| Midwest Equity Mortgage, LLC | 10 | 0 | 90% | Mortgage |
| Midwest Fidelity Services, LLC | 193 | 67 | 97.9% | Debt collection |
| Midwest Finance Corporation | 14 | 3 | 92.9% | Payday loan, title loan, or personal loan |
| Midwest Loan Services, Inc. | 116 | 21 | 99.1% | Mortgage |
| Midwest Receivable Solutions LLC | 89 | 41 | 100% | Debt collection |
| Midwest Recovery Systems | 1,933 | 0 | 84.2% | Debt collection |
| Midwest Resale Specialist, Inc. | 25 | 14 | 100% | Debt collection |
| Midwest Service Bureau, Inc. | 61 | 6 | 96.7% | Debt collection |
| Midwestern Health Management INC | 63 | 0 | 100% | Debt collection |
| Miguel A. Maza & Associates, PSC | 13 | 4 | 84.6% | Debt collection |
| Milend, Inc. | 16 | 1 | 93.8% | Mortgage |
| Millco Management | 783 | 69 | 95.4% | Debt collection |
| Millennial Home Lending, Inc | 15 | 0 | 100% | Mortgage |
| Millennium Financial Group, L.L.C. | 65 | 10 | 67.7% | Debt collection |
| Miller and Steeno, P.C. | 29 | 1 | 86.2% | Debt collection |
| Miller Davis & Peoples | 30 | 8 | 73.3% | Debt collection |
| Miller, Stark, Klein and Associates | 88 | 0 | 100% | Debt collection |