A Registered share is a stock

Stock

The capital stock of a business entity represents the original capital paid into or invested in the business by its founders. It serves as a security for the creditors of a business since it cannot be withdrawn to the detriment of the creditors...

that is registered on the name of the exact owner. If the owner of such a share sells his share, the new owner must register with name and address.

Registered shares offer issuers the advantage, enabling them to always know exactly who their shareholders are. Unexpected surprises with active investors could be prohibited with that stock-vehicle.