Horace Greeley High School alumni

American actress, singer and former Miss America (born 1963)

American businessman

American actor and director

William Albert Ackman is an American billionaire hedge fund manager who is the founder and chief executive of Pershing Square Capital Management, an investment management company. He has been described as an activist investor. As of April 2026, Ackman's net worth was estimated at $8 billion by Bloomberg.

American neuroscientist

American ice hockey player

American psychologist

American actor, suspence novels writer

American fashion designer

American technology executive, entrepreneur and author

American technology historian and archivist