Certifications By Registrar
| Certification Body | Count |
|---|---|
| Perry Johnson Registrars | 11985 |
| NSF-ISR | 3973 |
| NQA, USA | 3703 |
| TÜV SÜD America, Inc | 3529 |
| SRI Quality System Registrar, Inc | 1958 |
| American Systems Registrar | 1690 |
| Smithers Quality Assessments, Inc | 1045 |
| EAGLE Registrations, Inc | 1010 |
| American Petroleum Institute Quality Registrar | 818 |
| TUV Rheinland of North America | 577 |
| KEMA-Registered Quality, Inc | 468 |
| HSB Registration Services | 463 |
| Performance Review Institute | 413 |
| MCNA - Management Certification of North America | 249 |