John S. Koudounis, Date of Birth, Place of Birth
TweetJohn S. Koudounis
business executive
Date of Birth: 05-Mar-1966
Place of Birth: United States of America, United States
Profession: businessperson
Zodiac Sign: Pisces 
About John S. Koudounis
- John S.
- Koudounis is an American business executive who currently serves as chief executive officer for Calamos Investments.Previously he was the president and chief executive officer for Mizuho Securities USA Inc., a subsidiary of Japanese banking holding company Mizuho Financial Group.
- He is a regular commentator for television and financial news programs including Fox Business, CNBC, CNN, Bloomberg, and others.
- At 44 years of age, Koudounis was the youngest CEO of any Wall Street firm when he was appointed in 2010.Koudounis sits on the board of the National Hellenic Museum and the Hellenic Initiative.
- He also serves on the leadership board of Concordia as well as the board of MSUSA, and is a member of the prestigious Bretton Woods Committee.
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