Holtzbrinck announced Thursday morning that longtime ceo of Macmillan John Sargent will leave the company on January 1 “as a result of disagreements regarding the direction of Macmillan.” President of Macmillan US Trade Don Weisberg will take over in 2021 as ceo of Macmillan’s English-language trade publishers, and general manager of Macmillan Learning Susan Winslow will become president of that division. Winslow will report to Macmillan global coo Andrew Weber, who will report to parent company chief executive Stefan von Holtzbrinck on higher education issues, and to Weisberg on trade matters. Holtzbrinck’s German division has reported to Sargent as well. […]