It is difficult to maintain a list of ISO 9001 registered companies because:
- There is not a single body that registers organizations worldwide. ISO does not register people, an accredited Registrar does. (List Below). The ANAB provides more info on the levels of oversight for iso certification.
- It is only a 3 year certification - companies may switch registrars after 3 years and this becomes increasingly difficult to track.
- Companies may be registered by several organizations for different standards
- It costs money to maintain a list like this.
To understand the relationship, see: Who is eligible to grant ISO 9001 Certification?
Complete list of Registrars
Here is a complete list of ISO Registrars for all of the major ISO standards: