ROTTERDAM, THE NETHERLANDS — Ian McIntosh plans to retire as chief executive officer of Louis Dreyfus Co. Holdings BV in September. Michael (Mike) Gelchie, chief operating officer, will become the new CEO on Oct. 1. Mr. McIntosh first joined Louis Dreyfus in 1986 and was named CEO in September 2018. Mr. Gelchie began working with Louis Dreyfus in 1990 and assisted in the startup of Louis Dreyfus Investment Group in 2008 as a senior portfolio manager. He left Louis Dreyfus in 2010 but rejoined the company and was named COO in 2019. He now will serve as deputy CEO before becoming CEO.