John Calamos and Updates from CGIIX, CIHEX PMs to Close the CIO Conference Call Series

Before investing carefully consider the fund’s investment objectives, risks, charges and expenses. Please see the prospectus and summary prospectus containing this and other information which can be obtained by calling 1-800-582-6959. Read it carefully before investing.

Alternative investments may not be suitable for all investors.

Opinions are subject to change due to changes in the market, economic conditions or changes in the legal and/or regulatory environment and may not necessarily come to pass. This information is provided for informational purposes only and should not be considered tax, legal, or investment advice. References to specific securities, asset classes and financial markets are for illustrative purposes only and are not intended to be, and should not be interpreted as, recommendations.

Important Risk Information. An investment in the Fund(s) is subject to risks, and you could lose money on your investment in the Fund(s). There can be no assurance that the Fund(s) will achieve its investment objective. Your investment in the Fund(s) is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. The risks associated with an investment in the Fund(s) can increase during times of significant market volatility. The Fund(s) also has specific principal risks, which are described below. More detailed information regarding these risks can be found in the Fund's prospectus.

The principal risks of investing in Calamos Market Neutral Income Fund include: equity securities risk consisting of market prices declining in general, convertible securities risk consisting of the potential for a decline in value during periods of rising interest rates and the risk of the borrower to miss payments, synthetic convertible instruments risk, convertible hedging risk, covered call writing risk, options risk, short sale risk, interest rate risk, credit risk, high yield risk, liquidity risk, portfolio selection risk, and portfolio turnover risk.

The principal risks of investing in Calamos Phineus Long/Short Fund include: equity securities risk consisting of market prices declining in general, short sale risk consisting of potential for unlimited losses, foreign securities risk, currency risk, geographic concentration risk, other investment companies (including ETFs) risk, derivatives risk, options risk, and leverage risk.

The principal risks of investing in the Calamos Hedged Equity Fund include: covered call writing risk, options risk (see definition below), equity securities risk, correlation risk, mid-sized company risk, interest rate risk, credit risk, liquidity risk, portfolio turnover risk, portfolio selection risk, foreign securities risk, American depository receipts, and REITs risks.

The principal risks of investing in the Calamos Convertible Fund include: convertible securities risk consisting of the potential for a decline in value during periods of rising interest rates and the risk of the borrower to miss payments, synthetic convertible instruments risk consisting of fluctuations inconsistent with a convertible security and the risk of components expiring worthless, foreign securities risk, equity securities risk, interest rate risk, credit risk, high yield risk, portfolio selection risk and liquidity risk. As a result of political or economic instability in foreign countries, there can be special risks associated with investing in foreign securities, including fluctuations in currency exchange rates, increased price volatility and difficulty obtaining information. In addition, emerging markets may present additional risk due to potential for greater economic and political instability in less developed countries.

The principal risks of investing in the Calamos Growth and Income Fund include: convertible securities risk consisting of the potential for a decline in value during periods of rising interest rates and the risk of the borrower to miss payments, synthetic convertible instruments risk consisting of fluctuations inconsistent with a convertible security and the risk of components expiring worthless, equity securities risk, growth stock risk, small and mid-sized company risk, interest rate risk, credit risk, liquidity risk, high yield risk, forward foreign currency contract risk and portfolio selection risk.

The principal risks of investing in the Calamos Timpani Small Cap Growth Fund include: equity securities risk consisting of market prices declining in general, growth stock risk consisting of potential increased volatility due to securities trading at higher multiples, and portfolio selection risk. The Fund invests in small capitalization companies, which are often more volatile and less liquid than investments in larger companies. As a result of political or economic instability in foreign countries, there can be special risks associated with investing in foreign securities, including fluctuations in currency exchange rates, increased price volatility and difficulty obtaining information. In addition, emerging markets may present additional risk due to potential for greater economic and political instability in less developed countries.

Options Risk—the Fund's ability to close out its position as a purchaser or seller of an over-the-counter or exchange-listed put of call option is dependent, in part, upon the liquidity of the options market. There are significant differences between the securities and options markets that could result in an imperfect correlation among these markets, causing a given transaction not to achieve its objectives. The Fund's ability to utilize options successfully will depend on the ability of the Fund's investment advisor to predict pertinent market movements, which cannot be assured.

Convertible securities entail interest rate risk and default risk.

Fixed-income securities are subject to interest rate risk. If rates increase, the value of fixed-income invest­ments generally declines.

As a result of political or economic instability in foreign countries, there can be special risks associated with investing in foreign securities, including fluctuations in currency exchange rates, increased price volatility and difficulty obtaining information. In addition, emerging markets may present additional risk due to potential for greater economic and political instability in less developed countries.

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