Until that time, Boyne will act in an advisory role and assist the company in the transition of his duties and responsibilities.

Boyne joined Calamos Investments in April 2008 and has served in a number of executive positions since then. He has decided to pursue a leadership position in the non-profit sector, Calamos said.     

The firm said it has no plans to replace the role of president and COO; Boyne's responsibilities will be assumed by other senior leaders at Calamos, including the firm's executive and operating committees.

Headquartered in Chicago, IL, Calamos Investments also has offices in New York and London.