John Koudounis – Biography
Last update: April 21, 2026Executive profile
John was President and Chief Executive Officer at Mizuho Securities USA, and Managing Director and Head of Fixed Income at ABN AMRO North America. John Koudounis joined Calamos in 2016.
John Koudounis is currentlyPresident and Chief Executive Officer at Calamos - View - Calamos org chart
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John Koudounis graduated from University of Maryland.
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- At Calamos, John Koudounis has 50 colleagues including Brandon Nelson (Portfolio), Jessica Fernandez (Marketing)…
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