As Bill Ackman goes after journalism organizations, higher education, and D.E.I., he is using many of the tactics he developed and relied on as an activist investor. Bryan Bedder/Getty Images hide caption toggle caption Bryan Bedder/Getty Images Business Combative billionaire Bill Ackman uses bare-knuckle boardroom tactics in a wider war January 24, 2024 Hedge fund boss Bill Ackman has fought bitter battles in corporate boardrooms. He fights with lengthy public letters and for years. He's taking those tactics to Ivy League universities and the media.