![John Koudounis](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
John Koudounis
Chief Executive Officer at
CALAMOS ASSET MANAGEMENT, INC
Net worth: 3 M $ as of 30/07/2026
Profile
John Spiro Koudounis is President, Chief Executive Officer & Director at Calamos Asset Management, Inc. since 2021.
He is President & Chief Executive Officer at Calamos Financial Services LLC since 2021.
He is President & Chief Executive Officer at Calamos Advisors LLC since 2023.
He is President & Chief Executive Officer at Calamos Wealth Management LLC since 2016.
He is President & Chief Executive Officer at Calamos Investments LLC since 2022.
He serves as Director at World Business Chicago, The Hellenic Initiative, and National Hellenic Museum.
He is Vice President at Calamos Convertible Opportunities & Income Fund, Calamos Convertible & High Income Fund, Calamos Global Total Return Fund, Calamos Global Dynamic Income Fund since 2016.
He is Trustee & Vice President at Calamos Strategic Total Return Fund since 2025 and Calamos Dynamic Convertible & Income Fund.
He is Vice President at Calamos Long since 2017.
Formerly, he was President & Chief Executive Officer at Mizuho Securities USA LLC from 2008 to 2016.
He was Vice President at Merrill Lynch, Pierce, Fenner & Smith, Inc. in 1993.
He was Principal at ABN AMRO, Inc. in 2008.
He completed undergraduate education at Brown University in 1984.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
Calamos Aksia Alternative Credit Fund
 Calamos Aksia Alternative Credit Fund Investment Trusts/Mutual FundsMiscellaneous Functions as a closed-end investment fund or Investment trust -.--% | 29/06/2025 | 235,808 ( -.--% ) | 2 M $ | 30/07/2026 |
| 31/08/2025 | 15,830 ( 0.01% ) | 318 816 $ | 30/07/2026 |
John Koudounis active positions
| Companies | Position | Start |
|---|---|---|
| CALAMOS ASSET MANAGEMENT, INC | Chief Executive Officer | 03/04/2016 |
| CALAMOS GLOBAL TOTAL RETURN FUND | Corporate Officer/Principal | 31/12/2015 |
| CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND | Corporate Officer/Principal | 31/12/2015 |
| CALAMOS CONVERTIBLE AND HIGH INCOME FUND | Corporate Officer/Principal | 31/12/2015 |
| CALAMOS STRATEGIC TOTAL RETURN FUND | Director/Board Member | 31/08/2025 |
| CALAMOS GLOBAL DYNAMIC INCOME FUND | Corporate Officer/Principal | 31/12/2015 |
| CALAMOS DYNAMIC CONVERTIBLE AND INCOME FUND | Director/Board Member | - |
| CALAMOS LONG/SHORT EQUITY & DYNAMIC INCOME TERM TRUST | Corporate Officer/Principal | 31/12/2016 |
Calamos Wealth Management LLC
 Calamos Wealth Management LLC Investment ManagersFinance Provides global advisory and wealth management services | Chief Executive Officer | 31/12/2015 |
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Former positions of John Koudounis
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Training of John Koudounis
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
92
1st degree connections
19
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 19 |
|---|---|
Merrill Lynch, Pierce, Fenner & Smith, Inc. /Old/
 Merrill Lynch, Pierce, Fenner & Smith, Inc. /Old/ Investment Banks/BrokersFinance Provides brokerage services | Finance |
Calamos Asset Management, Inc.
 Calamos Asset Management, Inc. Investment ManagersFinance Operates as a diversified investment management company | Finance |
Mizuho Securities USA LLC
 Mizuho Securities USA LLC Investment Banks/BrokersFinance Provides brokerage services | Finance |
Calamos Financial Services LLC
 Calamos Financial Services LLC Investment Banks/BrokersFinance Part of Calamos Family Partners, Inc., Calamos Financial Services LLC is a company based in Naperville, IL. John Spiro Koudounis has been the CEO of the company since 2016. | Finance |
Calamos Convertible Opportunities & Income Fund
 Calamos Convertible Opportunities & Income Fund Investment Trusts/Mutual FundsMiscellaneous Acts as Closed-End Investment Fund/Investment Trust | Miscellaneous |
Calamos Strategic Total Return Fund
 Calamos Strategic Total Return Fund Investment Trusts/Mutual FundsMiscellaneous Acts as Closed-End Investment Fund/Investment Trust | Miscellaneous |
Calamos Convertible & High Income Fund
 Calamos Convertible & High Income Fund Investment Trusts/Mutual FundsMiscellaneous Acts as Closed-End Investment Fund/Investment Trust | Miscellaneous |
Calamos Global Total Return Fund
 Calamos Global Total Return Fund Investment Trusts/Mutual FundsMiscellaneous Acts as Closed-End Investment Fund/Investment Trust | Miscellaneous |
Calamos Global Dynamic Income Fund
 Calamos Global Dynamic Income Fund Investment Trusts/Mutual FundsMiscellaneous Acts as Closed-End Investment Fund/Investment Trust | Miscellaneous |
Calamos Dynamic Convertible & Income Fund
 Calamos Dynamic Convertible & Income Fund Investment Trusts/Mutual FundsMiscellaneous Acts as Closed-End Investment Fund/Investment Trust | Miscellaneous |
Calamos Long/Short Equity & Dynamic Income Trust
 Calamos Long/Short Equity & Dynamic Income Trust Investment Trusts/Mutual FundsMiscellaneous Acts as Closed-End Investment Fund/Investment Trust | Miscellaneous |
Brown University
 Brown University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
ABN AMRO, Inc.
 ABN AMRO, Inc. Investment Banks/BrokersFinance Provides brokerage services | Finance |
Calamos Advisors LLC
 Calamos Advisors LLC Investment ManagersFinance Calamos Advisors utilizes top-down insights with rigorous bottom-up fundamental research. They employ an active, high-conviction investment approach to building portfolios. A collaborative team-managed approach allows them to fully evaluate all elements of an investment idea. Top-down perspective, proprietary fundamental research and risk management drive the portfolio construction process across all strategies. | Finance |
World Business Chicago
 World Business Chicago Miscellaneous Commercial ServicesCommercial Services Provides economic data and statistical assistance services | Commercial Services |
Calamos Wealth Management LLC
Calamos Wealth Management LLC Investment ManagersFinance Provides global advisory and wealth management services | Finance |
Calamos Investments LLC
 Calamos Investments LLC Investment ManagersFinance Calamos Investments offers innovative investment strategies including alternatives, multi-asset, convertible, fixed income, and equity. | Finance |
The Hellenic Initiative
 The Hellenic Initiative Miscellaneous Commercial ServicesCommercial Services Operates fund-raising initiative to develop economic and business improvement programs | Commercial Services |
National Hellenic Museum
 National Hellenic Museum Other Consumer ServicesConsumer Services Operates museums and exhibition centers | Consumer Services |
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