Calamos Convertible Fund (CCVCX)

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 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.

Performance data quoted represents past performance, which is no guarantee of future results. Current performance may be lower or higher than the performance quoted. Please refer to Important Risk Information. The principal value and return of an investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Performance reflected at NAV does not include the Fund's maximum front-end sales load of 2.25%. Had it been included, the Fund's return would have been lower.

The ICE BofA All U.S. Convertibles Index (VXA0) measures the return of all U.S. convertibles.

S&P 500 Index-Is generally considered representative of the U.S. stock market.

Unmanaged index returns assume reinvestment of any and all distributions and, unlike fund returns, do not reflect fees, expenses or sales charges. Investors cannot invest directly in an index.

Average annual total return measures net investment income and capital gain or loss from portfolio investments as an annualized average. All performance shown assumes reinvestment of dividends and capital gains distributions.

The funds' gross expense ratios as of the prospectus dated 3/1/2021 are as follows: A Shares 1.14%, C Shares 1.89% and I Shares 0.89%.

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE

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 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.

Top 10 Holdings and Sector Weightings are calculated as a percentage of Net Assets. The tables exclude cash or cash equivalents, any government / sovereign bonds or broad based index hedging securities the portfolio may hold.

Sector Weightings percentages are based on invested portfolio and are subject to change. Other includes securities that do not have a sector classification.

Holdings and weightings are subject to change daily. Holdings are provided for informational purposes only and should not be deemed as a recommendation to buy or sell the securities mentioned.

Market Capitalization statistics are based on common stock holdings.

Bond Credit Quality allocation reflects the higher of the ratings of Standards & Poor's Corporation or Moody's Investors Service, Inc. Ratings are relative, subjective and not absolute standards of quality, represent the opinions of the independent, Nationally Recognized Statistical Rating Organizations (NRSRO), and are adjusted to the Standards & Poor's scale shown. Ratings are measured using a scale that typically ranges from AAA (highest) to D (lowest). The security's credit rating does not eliminate risk. The table excludes equity securities, cash and cash equivalents. For more information about securities ratings, please see the Fund's Statement of Additional Information at calamos.com. Additional information on ratings methodologies are available by visiting the NRSRO websites: www.standardandpoors.com and www.moodys.com.

Conversion Premium- is the amount by which the market price of a convertible bond or convertible preferred exceeds the conversion value, expressed as a percentage. It is a gauge of equity participation.

Current (SEC) Yield-Reflects the dividends and interest earned by the Fund during the 30-day period ended as of the date stated above after deducting the Fund's expenses for that same period.

Debt/Capital Ratio-Is a measure of a company's financial leverage, calculated as the company's debt divided by its total capital.

Distribution Yield -Is calculated by dividing the sum of all distributions paid by the fund over the trailing 12 months by the fund's NAV as of the date of the period presented. Distributions may include income, short-term capital gains, and long-term capital gains. Short-term and long-term capital gains represent the net trading profits realized over the trailing 12 months in the fund and are not guaranteed. Distribution Yield is based on distributions made in the past and is therefore not reflective of the fund's current portfolio.

Duration- provides a measure of the Fund's interest rate sensitivity-the longer a fund's duration, the more sensitive it is to shifts in interest rates

Investment Premium-is the amount that the market price of the convertible is above its investment value, expressed as a percentage. It is a gauge of equity participation.

PEG Ratio-Is a stock's price/earnings ratio divided by estimated earnings growth rate in the next year; a lower PEG indicates that less is being paid for each unit of earnings growth.

Price/Book Ratio-Is the stock's capitalization divided by its book value.

Price/Earnings Ratio-Is the current stock price over trailing 12-month earnings per share.

Price/Sales Ratio-Is a stock's capitalization divided by its sales over the trailing 12 months. ROIC (return on invested capital) measures how effectively a company uses the money invested in its operations, calculated as a company's net income minus any dividends divided by the company's total capital.

ROIC (Return On Invested Capital)-Measures how effectively a company uses the money invested in its operations, calculated as a company's net income minus any dividends divided by the company's total capital.

Turnover-Is the percentage of assets in a portfolio that changed over a certain period, often a year; higher turnover indicates greater buying and selling activity.

The ICE BofA All U.S. Convertibles Index (VXA0) measures the return of all U.S. convertibles.

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE

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 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.

Performance data quoted represents past performance, which is no guarantee of future results. Current performance may be lower or higher than the performance quoted. Please refer to Important Risk Information. The principal value and return of an investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Performance reflected at NAV does not include the Fund's maximum front-end sales load of 2.25%. Had it been included, the Fund's return would have been lower.

The funds' gross expense ratios as of the prospectus dated 3/1/2021 are as follows: A Shares 1.14%, C Shares 1.89% and I Shares 0.89%.

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE

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 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.

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NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE