The Finnish Arvopaperi magazine has announced the ownership structure of Rovio, the creators of Angry Birds. The information has not come up in any IPO filing, but through public information in the Finnish governmental registry. The biggest chunk of the Rovio is owned by Trema Holdings International BV, the holding company of Kaj Hed. Kaj Hed is Mikael's father and Mikael is Niklas' cousin. It seems that Accel and Atomico, who together invested $42 million into the company last year, own around 20% of the company.