Русско-англо-русский юридический словарь

There are 3 main methods to cancel shares in the UK: Share buyback - the company purchases its own shares from existing shareholders, which are which are then cancelled. [...] Capital reduction - the company formally reduces its share capital by cancelling existing shares. [...] Gift of shares to the company - shareholders can gift their shares back to the company. (taylor-rose.co.uk)

What is a forfeiture of shares? A company may by resolution cancel shares that have been forfeited and reduce its share capital by the amount that has been forfeited under the terms on which the shares they were issued pursuant to section 258D Cancellation of Forfeited Shares of the Corporations Act and the company’s constitution. (abbots.com.au)