A company key is required to access your Ontario Business Registry profile and make filings under the business statutes. Corporations created on or after October 19, 2021 will receive the company key as part of their registration. A company key consists of a unique series of digits and/or characters. It is provided to the official email, or registered office or other business address, as applicable, for a corporation under the business statutes. You can request a company key from the Ontario government at https://www.appmybizaccount.gov.on.ca/onbis/companykey/?lang=en