To become a member of the Lodge you need to own shares in a company, The Silver Brumby Limited. The Silver Brumby Limited is a privately held company and the shares are not listed on the stock exchange. Shares are sold privately, in parcels of 35 which cannot be separated. There are 225 parcels of shares in The Silver Brumby Limited and a Share Certificate is issued in the name(s) of the owners and is the proof of share ownership.

The Management Committee maintains a list of shares for sale, which is available to prospective buyers and new members together with an information guide for both buyers and sellers. This list of shares contains contact details of the owners selling shares so that prospective buyers can contact the sellers and make enquires.