The UK company, which owns the EDF Energy London Eye, The London Dungeon and Madame Tussauds, will sell at least 20% of its shares at a minimum investment of £1,000.
Merlin, the world's second largest visitor attraction operator behind Walt Disney, operates 99 attractions in 22 countries, attracting 54 million visitors a year.
As part of the move, Merlin Entertainments revealed a number of new appointments including four non-executive directors who will join the board in early 2014, including Ken Hydon, former group finance director at Vodafone; Charles Gurassa, deputy chairman at Easyjet; Miguel Ko, non-executive chairman of Starwood Hotels & Resort Worldwide, Asia Pacific; and Fru Hazlitt, managing director, commercial and online, of ITV.
Sir John Sunderland, non-executive chairman of Merlin, said: "I have been impressed by the significant growth that Merlin has delivered as a private company. But there is more to come and I believe Merlin has a very promising future as a publicly listed company. I, along with the rest of the board, am committed to working with the executive management team to ensure the continued success of the business."