This document discusses the concept of a subsidiary company under the Companies Act 2013. It defines total share capital to include both paid-up equity share capital and convertible preference share capital. For a company to be considered a subsidiary, the group company must exercise control over more than half of the total share capital, either on its own or together with other subsidiaries. Total share capital includes both equity and convertible preference shares. However, if a company issues redeemable preference shares rather than convertible shares, it would be considered an associate company rather than a subsidiary regardless of who holds the preference shares.