| Nps Group | 28 | 0 | 10.7% | Debt collection |
| NQM Funding, LLC | 20 | 3 | 85% | Mortgage |
| NRA Group, LLC | 3,538 | 1,262 | 97.2% | Debt collection |
| Ntfn Inc. | 12 | 3 | 50% | Mortgage |
| Nudelman, Klemm & Golub, P.C. | 12 | 0 | 66.7% | Debt collection |
| Nudge Funding, LLC | 10 | 1 | 90% | Mortgage |
| Nvr Inc. | 192 | 24 | 97.9% | Mortgage |
| O&L Law Group, P.L. | 50 | 4 | 100% | Debt collection |
| Oak Harbor Capital, LLC | 18 | 1 | 83.3% | Debt collection |
| Oakridge Direct Solutions Inc. | 17 | 0 | 5.9% | Debt collection |
| Oasis Legal Finance Holding Company, LLC | 48 | 13 | 81.3% | Payday loan, title loan, personal loan, or advance loan |
| Obligo Inc. | 10 | 9 | 100% | Debt collection |
| Oceanfirst Financial Corp. | 44 | 10 | 100% | Checking or savings account |
| Oceanside Mortgage Company | 53 | 0 | 83% | Mortgage |
| OCMBC, Inc | 27 | 1 | 44.4% | Mortgage |
| Ocwen Financial Corporation | 37,127 | 1,311 | 98.5% | Mortgage |
| Ofg Bancorp | 102 | 71 | 100% | Credit reporting or other personal consumer reports |
| Ogden Holdings, LLC | 11 | 3 | 100% | Debt collection |
| OHara Holdings, LLP | 14 | 5 | 71.4% | Credit reporting or other personal consumer reports |
| Oklahoma Motor Credit Company | 24 | 8 | 62.5% | Debt collection |
| Oklahoma Student Loan Authority | 195 | 5 | 98.5% | Student loan |
| Okx Inc. | 43 | 14 | 93% | Money transfer, virtual currency, or money service |
| Old National Bancorp | 511 | 98 | 99.4% | Checking or savings account |
| Old Republic National Title Holding Co. | 26 | 9 | 100% | Mortgage |
| Old Republic Title Holding Company, Inc | 23 | 3 | 100% | Mortgage |
| Oliphant Financial, LLC | 409 | 0 | 88.8% | Debt collection |
| Oliphant United, Inc. | 482 | 471 | 100% | Debt collection |
| Oliver Adjustment Co. | 204 | 0 | 97.1% | Debt collection |
| Oliver Adjustment Company of Kenosha & Racine, Inc | 11 | 0 | 81.8% | Debt collection |
| Olson Associates PC | 11 | 0 | 100% | Debt collection |
| Olympic Collection Inc. | 34 | 6 | 91.2% | Debt collection |
| Olympus1 LLC | 32 | 25 | 100% | Debt or credit management |
| OM Financial, LLC | 20 | 16 | 5% | Payday loan, title loan, personal loan, or advance loan |
| Omega RMS, LLC | 406 | 107 | 91.1% | Debt collection |
| Omni AR, LLC | 13 | 7 | 46.2% | Debt collection |
| Omnipoint Capital | 73 | 34 | 90.4% | Debt collection |
| On Q Financial | 54 | 2 | 96.3% | Mortgage |
| On-Site Manager, Inc. | 125 | 0 | 28.8% | Credit reporting, credit repair services, or other personal consumer reports |
| One Reverse Mortgage, LLC | 41 | 0 | 80.5% | Mortgage |
| One Source Technology | 281 | 123 | 98.6% | Credit reporting or other personal consumer reports |
| One Technologies, LP | 35 | 3 | 97.1% | Credit reporting, credit repair services, or other personal consumer reports |
| OneMain Finance Corporation | 10,591 | 3,585 | 100% | Credit reporting or other personal consumer reports |
| Onemain Finance Corporation | 300 | 0 | 98.3% | Credit reporting, credit repair services, or other personal consumer reports |
| Onemain Financial Holdings, LLC. | 2,646 | 0 | 99.8% | Credit reporting, credit repair services, or other personal consumer reports |
| ONLINE Information Services, Inc. | 3,324 | 1,000 | 99.9% | Debt collection |
| Onward Credit Holdings, LLC | 10 | 0 | 90% | Payday loan |
| Open Dealer Exchange, LLC | 1,411 | 405 | 98.2% | Credit reporting or other personal consumer reports |
| Open Mortgage LLC | 14 | 0 | 71.4% | Mortgage |
| OpenRoad Lending | 121 | 10 | 100% | Credit reporting, credit repair services, or other personal consumer reports |
| Oportun Financial Corporation | 1,816 | 580 | 98.7% | Credit reporting or other personal consumer reports |