In general, the requirements for an IPO are based on the regulations of the trading venue. Usually, companies place 10-25% of their shares in free float with the aim of covering their capital requirements for the following 12 months. Once the IPO has taken place, additional shares can be generated in return for new capital as a result of a capital increase. The dilution that comes with an IPO then depends on the company´s performance and can be offset by a warrant program if necessary.