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Henry J. Waternoose III, also known as Mr. Waternoose or simply Waternoose, is the main antagonist of Monsters, Inc. He is the former chairman of the company, Sulley and Mike's former boss, mentor, best friend, and father figure turned archenemy, and Randall's boss.

He was voiced by the late James Coburn.


Waternoose used to like Sulley and Mike as friends and believed Sulley to be his Top Scarer.

After Mike explains Randall's plan to him, Waternoose agrees to help return Boo to her door; but after Mike tells him he got the wrong door, Waternoose says that he knows and that the door is for Sulley and Mike, thus revealing that he is Randall's boss on the plan and has betrayed his former friends. Then he proceeds to push them into the door and banish them in the Himalayas. From that day on, Sulley, Mike, and Waternoose have now been enemies.


  • His middle name J. is sometimes thought to stand for James. However, this is currently unconfirmed.
  • Waternoose is sometimes thought to have been the founder of Monsters, Inc. However, this is false information.