Calamos Launches Long/Short Mutual Fund

Calamos Investments^®* CLMS announces the launch of the Calamos Long/Short Fund (A Shares: CALSX; C Shares: CCLSX; I Shares: CILSX; R Shares: CRLSX) as of June 2, 2013. Fund details, including a video featuring commentary by Brendan Maher, Senior Vice President and Co-Portfolio Manager of the Calamos Long/Short Fund, are available at www.calamos.com/longshort. The Calamos Long/Short Fund seeks to achieve its investment objective of long-term capital appreciation primarily by taking long and short positions in equity securities of large and mid-cap U.S. companies. The Calamos Long/Short Fund seeks to provide equity-like returns with the potential for lower volatility versus long-only funds through active stock selection and by adjusting market exposures within its portfolio, generally maintaining a net long exposure.