Calamos Global Total Return Fund (CGO)

Ordinary income includes net investment income and short-term capital gains. The distribution tables provided here are for informational purposes only. Estimates are calculated on a tax basis rather than on a generally accepted accounting principles (GAAP) basis, but should not be used for tax reporting purposes. Distributions may be subject to re-characterization for tax purposes after the end of the fiscal year. Individual (non-corporate) shareholders with taxable accounts will receive written notification regarding the components and tax treatment for distributions via Form 1099-DIV. If your distributions are reinvested in additional shares, you will receive a statement reflecting the reinvestment of the distribution. This information is not legal or tax advice. Consult a professional regarding your specific legal or tax matters.

Current Annualized Distribution Rate is the Fund's most recent distribution, expressed as an annualized percentage of the Fund's current market price per share. Information regarding the Fund's most recent distribution can be found on the Data and Distribution tab under the table titled "Year To Date Distribution Detail". Estimates are calculated on a tax basis rather than on a generally accepted accounting principles (GAAP) basis, but should not be used for tax reporting purposes. Distributions are subject to re-characterization for tax purposes after the end of the fiscal year. This information is not legal or tax advice. Consult a professional regarding your specific legal or tax matters. Under the Fund's level distribution policy, distributions paid to common shareholders may include net investment income, net realized short-term capital gains and return of capital. When the net investment income and net realized short-term capital gains are not sufficient, a portion of the distribution will be a return of capital. In addition, a limited number of distributions per calendar year may include net realized long-term capital gains. Distribution rate may vary. 

Performance data quoted represents past performance, which is no guarantee of future results. Current performance may be lower or higher than the performance quoted. The principal value of an investment will fluctuate so that your shares, when sold, may be worth more or less than their original cost. Returns at NAV reflect the deduction of the Fund's management fee, debt leverage costs and other expenses, which can be found on the fund overview tab.You can purchase or sell common shares daily. Like any other stock, market price will fluctuate with the market. Upon sale, your shares may have a market price that is above or below net asset value and may be worth more or less than your original investment. Shares of closed-end funds frequently trade at a discount which is a market price that is below their net asset value.

The Fund may invest up to 100% of its assets in foreign securities and invest in an array of security types and market-cap sizes, each of which has a unique risk profile. As a result of political or economic instability in foreign countries, there can be special risks associated with investing in foreign securities. These include fluctuations in currency exchange rates, increased price volatility, and difficulty obtaining information.

Convertible Securities Risk. The value of a convertible security is influenced by changes in interest rates, with investment value declining as interest rates increase and increasing as interest rates decline. The credit standing of the issuer and other factors also, may have an effect on the convertible security's investment value.

Investments by the Fund(s) in lower-rated securities involve substantial risk of loss and present greater risks than investments in higher-rated securities, including less liquidity and increased price sensitivity to changing interest rates and to a deteriorating economic environment.

Fixed Income Risk. Fixed-income securities are subject to interest rate risk; as interest rates go up, the value of debt securities in the Fund's portfolio generally will decline.

The Fund(s) may invest in derivative securities, including options and swap agreements. The use of derivatives present risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. There is no assurance that any derivative strategy used by the Fund will succeed. One of the risks associated with purchasing an option is that the Fund pays a premium whether or not the option is exercised.

The Fund may seek to purchase index put options to help reduce downside exposure. However, the effectiveness of the Fund's index option-based risk management strategy may be reduced if the Fund's equity portfolio does not correlate to the performance of the underlying option positions. The Fund also risks losing all or part of the cash paid for purchasing index options. Unusual market conditions or a lack of a ready market of any particular option at a specific time may reduce the effectiveness of the Fund's options strategies, and for these and other reasons the Fund's options strategies may not reduce the Fund's volatility to the extent desired. From time to time, the Fund may reduce its holdings of put options, resulting in an increased exposure to a market decline. 

Leverage creates risks which may adversely affect return, including the likelihood of greater volatility of net asset value and market price of common shares; and fluctuations in the variable rates of the leverage financing. The ratio is the percent of borrowing to total assets.

Each fund has specific risks, which are outlined in the respective funds' prospectuses. The general risks involved in investing in a closed end fund include market volatility risk, dividend and income risk, and loss of investment risk. Please refer to each fund's prospectus, annual and semi-annual reports at www.calamos.com for complete information on the fund's performance, investments and risks. 

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE

Current Annualized Distribution Rate is the Fund's most recent distribution, expressed as an annualized percentage of the Fund's current market price per share. Information regarding the Fund's most recent distribution can be found on the Data and Distribution tab under the table titled "Year To Date Distribution Detail". Estimates are calculated on a tax basis rather than on a generally accepted accounting principles (GAAP) basis, but should not be used for tax reporting purposes. Distributions are subject to re-characterization for tax purposes after the end of the fiscal year. This information is not legal or tax advice. Consult a professional regarding your specific legal or tax matters. Under the Fund's level distribution policy, distributions paid to common shareholders may include net investment income, net realized short-term capital gains and return of capital. When the net investment income and net realized short-term capital gains are not sufficient, a portion of the distribution will be a return of capital. In addition, a limited number of distributions per calendar year may include net realized long-term capital gains. Distribution rate may vary. 

Performance data quoted represents past performance, which is no guarantee of future results. Current performance may be lower or higher than the performance quoted. The principal value of an investment will fluctuate so that your shares, when sold, may be worth more or less than their original cost. Returns at NAV reflect the deduction of the Fund's management fee, debt leverage costs and other expenses, which can be found on the fund overview tab.You can purchase or sell common shares daily. Like any other stock, market price will fluctuate with the market. Upon sale, your shares may have a market price that is above or below net asset value and may be worth more or less than your original investment. Shares of closed-end funds frequently trade at a discount which is a market price that is below their net asset value.

Average annual return measures net investment income and capital gain or loss from portfolio investments as an annualized average, assuming reinvestment of income and capital gain distributions. In calculating net investment income, all applicable fees and expenses are deducted from the returns. Calendar year returns measure net investment income and capital gain or loss from portfolio investments for each period specified.

The Fund may invest up to 100% of its assets in foreign securities and invest in an array of security types and market-cap sizes, each of which has a unique risk profile. As a result of political or economic instability in foreign countries, there can be special risks associated with investing in foreign securities. These include fluctuations in currency exchange rates, increased price volatility, and difficulty obtaining information.

Convertible Securities Risk. The value of a convertible security is influenced by changes in interest rates, with investment value declining as interest rates increase and increasing as interest rates decline. The credit standing of the issuer and other factors also, may have an effect on the convertible security's investment value.

Investments by the Fund(s) in lower-rated securities involve substantial risk of loss and present greater risks than investments in higher-rated securities, including less liquidity and increased price sensitivity to changing interest rates and to a deteriorating economic environment.

Fixed Income Risk. Fixed-income securities are subject to interest rate risk; as interest rates go up, the value of debt securities in the Fund's portfolio generally will decline.

The Fund(s) may invest in derivative securities, including options and swap agreements. The use of derivatives present risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. There is no assurance that any derivative strategy used by the Fund will succeed. One of the risks associated with purchasing an option is that the Fund pays a premium whether or not the option is exercised.

The Fund may seek to purchase index put options to help reduce downside exposure. However, the effectiveness of the Fund's index option-based risk management strategy may be reduced if the Fund's equity portfolio does not correlate to the performance of the underlying option positions. The Fund also risks losing all or part of the cash paid for purchasing index options. Unusual market conditions or a lack of a ready market of any particular option at a specific time may reduce the effectiveness of the Fund's options strategies, and for these and other reasons the Fund's options strategies may not reduce the Fund's volatility to the extent desired. From time to time, the Fund may reduce its holdings of put options, resulting in an increased exposure to a market decline. 

Leverage creates risks which may adversely affect return, including the likelihood of greater volatility of net asset value and market price of common shares; and fluctuations in the variable rates of the leverage financing. The ratio is the percent of borrowing to total assets.

Each fund has specific risks, which are outlined in the respective funds' prospectuses. The general risks involved in investing in a closed end fund include market volatility risk, dividend and income risk, and loss of investment risk. Please refer to each fund's prospectus, annual and semi-annual reports at www.calamos.com for complete information on the fund's performance, investments and risks. 

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE