North Refrigeration

North Refrigeration was a fake company that was created by the Penguin and his men to smuggle illegal weapons caches during the events of Batman: Arkham Knight. It was created via a deed that the Cobblepots stashed inside their manor, which Penguin retrieved shortly after the events of Arkham City.

Nightwing, who already investigated the group at Blüdhaven, went over to Gotham City. He eventually allied with Batman to find the North Refrigeration trucks so Batman could follow them back to the secret weapons cache. Batman, who had recently lost Oracle to Scarecrow and the Arkham Knight, reluctantly accepted Nightwing's aid. North Refrigeration was ultimately shut down alongside Penguin's criminal empire after all of the weapons caches were destroyed and Penguin himself arrested.

Trivia

 * The name of the company was most likely a reference to Penguin's voice actor in the game, Nolan North.