Calamos Investments

Calamos Investments is a diversified global investment manager committed to excellence in investment management and client service.

Calamos was founded in 1977 by John P. Calamos, Sr. who sought innovative, risk-managed approaches to grow and preserve capital. Today the firm is recognized as a pioneer in utilizing convertible securities and alternative investments to manage risk, and has retained its character as a boutique investment firm.

Headquartered in the Chicago metropolitan area, the firm also has offices in London, New York, San Francisco, and the Miami area. Calamos offers strategies through separately managed portfolios, mutual funds, closed-end funds, private funds and UCITS funds. Clients include major corporations, pension funds, endowments, foundations and individuals, as well as the financial advisors and consultants who serve them. 

Company details



Naperville, IL

Year founded


Company size

201-500 employees


Equity, Convertibles, Fixed Income, Alternatives, and Long/Short