The Seaport Terminal Operators Association of Nigeria (STOAN) was formed in 2006 as the umbrella body of private terminal operators at Nigerian ports. Members of the association, who are collectively responsible for operations at 25 terminals across six major seaports in Nigeria, have collectively invested over USD1billion in modernising and upgrading the ports in Apapa, Tin Can, Warri, Port Harcourt, Calabar and Onne.