Certifications By Registrar
| Certification Body | Count |
|---|---|
| Perry Johnson Registrars | 9113 |
| NSF-ISR | 3973 |
| NQA, USA | 3793 |
| American Systems Registrar | 3456 |
| TÜV SÜD America, Inc | 3455 |
| SRI Quality System Registrar, Inc | 1842 |
| Smithers Quality Assessments, Inc | 998 |
| EAGLE Registrations, Inc | 987 |
| American Petroleum Institute Quality Registrar | 774 |
| TUV Rheinland of North America | 558 |
| KEMA-Registered Quality, Inc | 468 |
| HSB Registration Services | 458 |
| Performance Review Institute | 370 |
| MCNA - Management Certification of North America | 249 |