Grunnings

Grunnings was the drill factory of which Vernon Dursley was it's director.

Harry Potter and the Philospher's Stone
One day Vernon Dursley left for the office at Grunnings, when he began noticing odd events happening around him. While he worked there he recieved multiple odd news items, including stuff about his family. He left that day early to return home.

Appearances

 * Harry Potter and the Philospher's Stone