Issuer sponsored shares are issued directly from the company and are maintained by a share registry. They are identified by a Securities Reference Number (SRN) that typically starts with an “I” e.g. I00076272.
Broker sponsored shares are issued to you via CHESS and sponsored by a stockbroker. They are identified by one single Holder Identification Number (HIN) that starts with an “X” e.g. X000987626.