The activists unfurled a banner at a December 2009 banquet of world leaders after gaining access to the building in a limousine equipped with a false police light that joined a convoy of vehicles en route to the venue.

The Copenhagen City Court found the protesters guilty of trespassing, falsifying a license plate and impersonating a police officer. The Greenpeace Nordic office in the Danish capital, which planned the stunt, was fined 75,000 kroner ($14,500), according to Monday’s ruling.

They included demonstrators from Spain, Switzerland, Norway and Netherlands.