Opportunistic Value Fund (CVAAX)

10k Performance is for the Fund’s Class A shares at net asset value and does not include the Fund’s maximum front-end sales charge of 4.75%—had it been included, the Fund’s return would have been lower. Index data shown is from 12/31/01, since comparative index data is available only for full monthly periods. Source: State Street Corporation, Lipper, Inc. and Mellon Analytical Solutions, LLC.

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 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 4.75% had it been included, the Fund’s return would have been lower. Calendar year returns measure net investment income and capital gain or loss from portfolio investments for each period specified. 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 Fund also offers Class B and C Shares, the performance of which may vary.

The offering price for Class I shares is the NAV per share with no initial sales charge. There are no contingent deferred sales charges or distribution or service fees with respect to Class I shares. The minimum initial investment required to purchase each Fund’s Class I shares is $1 million. Class I shares are offered primarily for direct investment by investors through certain tax-exempt retirement plans (including 401(k) plans, 457 plans, employer-sponsored 403(b) plans, profit sharing and money purchase pension plans, defined benefit plans and non qualified deferred compensation plans) and by institutional clients, provided such plans or clients have assets of at least $1 million. Class I shares may also be offered to certain other entities or programs, including, but not limited to, investment companies, under certain circumstances.

Russell 1000^® Value Index-measures the performance of those companies in the Russell 1000® Index with lower price-to-book ratios and lower forecasted growth values.

Sector Weightings

^{AS OF 6/30/18}

	% of Assets
Financials	26.9%
Information Technology	14.7%
Energy	13.2%
Health Care	12.2%
Industrials	9.2%
Consumer Discretionary	8.0%
Consumer Staples	4.3%
Utilities	4.1%
Materials	3.7%
Real Estate	2.0%
Telecom Services	1.7%

Asset Allocation

^{AS OF 6/30/18}

Top 10 Holdings

View All Holdings ^{AS OF 6/30/18}

Company	Security Type	Industry	%
JPMorgan Chase & Company	Common Stocks	Diversified Banks	2.9%
Berkshire Hathaway, Inc. - Class B	Common Stocks	Multi-Sector Holdings	2.7%
Bank of America Corp.	Common Stocks	Diversified Banks	2.3%
Exxon Mobil Corp.	Common Stocks	Integrated Oil & Gas	2.2%
Intel Corp.	Common Stocks	Semiconductors	1.8%
Chevron Corp.	Common Stocks	Integrated Oil & Gas	1.8%
Johnson & Johnson	Common Stocks	Pharmaceuticals	1.7%
Cisco Systems, Inc.	Common Stocks	Communications Equipment	1.6%
Pfizer, Inc.	Common Stocks	Pharmaceuticals	1.4%
Amazon.com, Inc.	Common Stocks	Internet & Direct Marketing Retail	1.4%
Total			19.8%

Fund Facts

^{AS OF 6/30/18}

	Fund	Russell 1000 Value Index
Total Net Assets	$48.8 million	--
# of Holdings	201	729
Price/Book	3.0x	2.1x
Price/Earnings	18.9x	16.1x
Price/Sales	1.8x	1.6x
PEG Ratio	1.6x	1.6x
Debt/Capital	43.6%	42.7%
ROIC	17.4%	12.9%
Portfolio Turnover (12 months)	113.1%	--

Market Capitalization

^{AS OF 6/30/18}

Market	%
> $106bil	36.0%
$29bil - $106bil	26.6%
$10bil - $29bil	22.0%
$4bil - $10bil	12.8%
< $4bil	2.6%

Regional Exposure

^{AS OF 6/30/18}

Region	%
North America	99.2%
Europe	0.4%
Latin America	0.3%
Asia/Pacific	0.0%
Caribbean	0.0%

Top Country Exposures

^{AS OF 6/30/18}

Country	%
United States	99.2%
Ireland	0.4%
Peru	0.3%
Bermuda	0.0%
China	0.0%
Luxembourg	0.0%
Netherlands	0.0%
Panama	0.0%
Puerto Rico	0.0%
Switzerland	0.0%

Top Currency Exposures

^{AS OF 6/30/18}

Currency	%
United States Dollar (USD)	100.0%

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. You can obtain a complete listing of holdings by visiting www.calamos.com.

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.

Important Fund Information

Annualized Standard Deviation-A statistical measure of the historical volatility of a mutual fund or portfolio, usually computed using 36 monthly returns.

Beta-Is a historic measure of a fund’s relative volatility, which is one of the measures of risk; a beta of 0.5 reflects 1/2 the market’s volatility as represented by the Fund’s primary benchmark, while a beta of 2.0 reflects twice the volatility.

Lipper LargeCap Core Funds-Represents funds that, by portfolio practice, invest at least 75% of their equity assets in companies with market capitalizations (on a three-year weighted basis) of greater than 300% of the dollar weighted median market capitalization of the S&P Mid-Cap 400 Index. Large-Cap Core funds have wide latitude in the companies in which they invest. These funds will normally have an average price-to earnings ratio, price-to-book ratio, and three-year earnings growth figure, compared to the U.S. diversified large-cap funds universe average.

Russell 1000 Value Index-Measures the performance of those companies in the Russell 1000 Index with lower price-to-book ratios and lower forecasted growth values. 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.

Portfolios are managed according to their respective strategies which may differ significantly in terms of security holdings, industry weightings, and asset allocation from those of the benchmark(s). Portfolio performance, characteristics and volatility may differ from the benchmark(s) shown.

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 the Calamos Value Fund include: equity securities risk, value stock risk, small and mid-sized company risk, foreign securities risk and portfolio selection 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. Before investing, carefully consider the Fund’s investment objectives, risks, charges and expenses. Contact 800.582.6959 for a prospectus containing this and other information. Read it carefully.

For more information about the Funds such as sector weightings, top holdings, credit ratings and distribution rates, please contact Client Services at 800-582-6959.

Each Fund is a series of Calamos Investment Trust. The investment adviser to the Funds is Calamos Advisors LLC. The Calamos Family of Funds offers a range of investment strategies for individual investors with diverse investment objectives and needs. For more information on the Funds, please call 800-582-6959.

Morningstar Ratings are based on risk-adjusted returns. The Overall Morningstar Rating is derived from a weighted average of the performance figures associated with a fund’s 3-, 5-, and 10-year Morningstar Rating metrics.

For each U.S.-domiciled fund with at least a three-year history, Morningstar calculates a Morningstar Rating based on a Morningstar Risk-Adjusted Return measure that accounts for variation in a fund’s monthly performance (including the effects of sales charges, loads and redemption fees), placing more emphasis on downward variations and rewarding consistent performance. The top 10% of funds in each category receive 5 stars, the next 22.5% receive 4 stars, the next 35% receive 3 stars, the next 22.5% receive 2 stars and the bottom 10% receive 1 star. (Each share class is counted as a fraction of one fund within this scale and rated separately, which may cause slight variations in the distribution percentages.) Morningstar data: © 2017 Morningstar, Inc. All rights reserved. The information contained herein is proprietary to Morningstar and/or its content providers; may not be copied or distributed; and is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.

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 4.75%. Had it been included, the Fund's return would have been lower.

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. Performance shown reflects an expense reimbursement that improved results. Load-adjusted returns are adjusted for the maximum front-end sales load of 2.25%* for Class A shares in the following funds: Convertible Fund, Global Convertible Fund, Market Neutral Income Fund, High Income Opportunities Fund, and Total Return Bond Fund. The maximum front-end sales load for Class A shares of all other funds is 4.75%. There is a 1% contingent deferred sales charge for C shares on certain redemptions within the first year of purchase. Class C shares have been adjusted for the contingent deferred sales charge (CDSC). There are no contingent deferred sales charges or distribution or service fees with respect to Class I shares. The minimum initial investment required to purchase each Fund's Class I shares is $1 million. Class I shares are offered primarily for direct investment by investors through certain tax-exempt retirement plans (including 401(k) plans, 457 plans, employer-sponsored 403(b) plans, profit sharing and money purchase pension plans, defined benefit plans and non-qualified deferred compensation plans) and by institutional clients, provided such plans or clients have assets of at least $1 million. Class I shares may also be offered to certain other entities or programs, including, but not limited to, investment companies, under certain circumstances. *Prior to 2/28/17, the Convertible Fund, Global Convertible Fund, Market Neutral Income Fund, and High Income Opportunities fund had a maximum front-end sales load of 4.75%, and the Total Return Bond Fund had a maximum front-end sales load of 3.75%.

The funds' gross expense ratios as of the prospectus dated 3/1/18 are as follows: Growth A 1.40%, C 2.15% and I 1.15%; Growth and Income A 1.12%, C 1.87% and I 0.87%; Opportunistic Value A 1.67%, C 2.42% and I 1.42%; Dividend Growth A 1.87%, C 2.73% and I 1.80%; Global Growth and Income A 1.54%, C 2.29% and I 1.29%; International Growth A 1.46%, C 2.21% and I 1.21%; Global Equity A 1.53%, C 2.27% and I 1.28%; Evolving World Growth A 1.67%, C 2.41% and I 1.41%; Emerging Market Equity A 2.70%, C 3.45% and I 2.45%; Convertible A 1.18%, C 1.93% and I 0.93%; Global Convertible A 1.46%, C 2.20% and I 1.19%; Market Neutral Income A 1.28%, C 2.03% and I 1.02%; Phineus Long/Short A 2.80%, C 3.55% and I 2.54%; Hedged Equity Income A 2.15%, C 3.04% and I 2.07%; High Income Opportunities A 1.33%, C 2.08% and I 1.08%; and Total Return Bond A 1.08%, C 1.83% and I 0.84%.  

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE

Before investing carefully consider the fund's investment objectives, risks, charges and expenses. Please see the prospectus containing this and other information or call 800-582-6959. Read it carefully.

For more information about the Funds such as sector weightings, top holdings, credit ratings and distribution rates, please contact Client Services at 800-582-6959.

Each Fund is a series of Calamos Investment Trust. The investment adviser to the Funds is Calamos Advisors LLC. The Calamos Family of Funds offers a range of investment strategies for individual investors with diverse investment objectives and needs. For more information on the Funds, please call 800-582-6959.

Morningstar Ratings are based on risk-adjusted returns. The Overall Morningstar Rating is derived from a weighted average of the performance figures associated with a fund’s 3-, 5-, and 10-year Morningstar Rating metrics.

For each U.S.-domiciled fund with at least a three-year history, Morningstar calculates a Morningstar Rating based on a Morningstar Risk-Adjusted Return measure that accounts for variation in a fund’s monthly performance (including the effects of sales charges, loads and redemption fees), placing more emphasis on downward variations and rewarding consistent performance. The top 10% of funds in each category receive 5 stars, the next 22.5% receive 4 stars, the next 35% receive 3 stars, the next 22.5% receive 2 stars and the bottom 10% receive 1 star. (Each share class is counted as a fraction of one fund within this scale and rated separately, which may cause slight variations in the distribution percentages.) Morningstar data: © 2017 Morningstar, Inc. All rights reserved. The information contained herein is proprietary to Morningstar and/or its content providers; may not be copied or distributed; and is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.

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 4.75%. Had it been included, the Fund's return would have been lower.

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. Performance shown reflects an expense reimbursement that improved results. Load-adjusted returns are adjusted for the maximum front-end sales load of 2.25%* for Class A shares in the following funds: Convertible Fund, Global Convertible Fund, Market Neutral Income Fund, High Income Opportunities Fund, and Total Return Bond Fund. The maximum front-end sales load for Class A shares of all other funds is 4.75%. There is a 1% contingent deferred sales charge for C shares on certain redemptions within the first year of purchase. Class C shares have been adjusted for the contingent deferred sales charge (CDSC). There are no contingent deferred sales charges or distribution or service fees with respect to Class I shares. The minimum initial investment required to purchase each Fund's Class I shares is $1 million. Class I shares are offered primarily for direct investment by investors through certain tax-exempt retirement plans (including 401(k) plans, 457 plans, employer-sponsored 403(b) plans, profit sharing and money purchase pension plans, defined benefit plans and non-qualified deferred compensation plans) and by institutional clients, provided such plans or clients have assets of at least $1 million. Class I shares may also be offered to certain other entities or programs, including, but not limited to, investment companies, under certain circumstances. *Prior to 2/28/17, the Convertible Fund, Global Convertible Fund, Market Neutral Income Fund, and High Income Opportunities fund had a maximum front-end sales load of 4.75%, and the Total Return Bond Fund had a maximum front-end sales load of 3.75%.

The funds' gross expense ratios as of the prospectus dated 3/1/18 are as follows: Growth A 1.40%, C 2.15% and I 1.15%; Growth and Income A 1.12%, C 1.87% and I 0.87%; Opportunistic Value A 1.67%, C 2.42% and I 1.42%; Dividend Growth A 1.87%, C 2.73% and I 1.80%; Global Growth and Income A 1.54%, C 2.29% and I 1.29%; International Growth A 1.46%, C 2.21% and I 1.21%; Global Equity A 1.53%, C 2.27% and I 1.28%; Evolving World Growth A 1.67%, C 2.41% and I 1.41%; Emerging Market Equity A 2.70%, C 3.45% and I 2.45%; Convertible A 1.18%, C 1.93% and I 0.93%; Global Convertible A 1.46%, C 2.20% and I 1.19%; Market Neutral Income A 1.28%, C 2.03% and I 1.02%; Phineus Long/Short A 2.80%, C 3.55% and I 2.54%; Hedged Equity Income A 2.15%, C 3.04% and I 2.07%; High Income Opportunities A 1.33%, C 2.08% and I 1.08%; and Total Return Bond A 1.08%, C 1.83% and I 0.84%.  

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE

Before investing carefully consider the fund's investment objectives, risks, charges and expenses. Please see the prospectus containing this and other information or call 800-582-6959. Read it carefully.

Calamos Opportunistic Value Fact Sheet The Opportunistic Value Fund fact sheet provides a snap shot of the investment team, the fund strategy, performance, composition, ratings and returns.

Calamos Opportunistic Value Fund Prospectus This summary contains important information about the Class A, B, C, I, and T Opportunisitic Value Fund investment objective, fees and expenses, principal investment strategies, principal risks and performance.

Statutory Prospectus You should read the accompanying prospectus and any accompanying prospectus supplement, which contain important information, before deciding whether to invest in our securities.

SAI The statement of additional information is a supplementary document to the fund’s prospectus and contains additional information about the fund and includes further disclosure regarding its operations.

Semi Annual Report The semiannual report includes a letter from John P. Calamos, Sr. to shareholders and provides a comprehensive review of the fund’s activities and financial performance over a six month period.

Annual Report The annual report includes a letter from John P. Calamos, Sr. to shareholders outlining the fund's performance, as well as a comprehensive review of the fund’s activities and financial performance.

Morningstar Ratings are based on risk-adjusted returns. The Overall Morningstar Rating is derived from a weighted average of the performance figures associated with a fund’s 3-, 5-, and 10-year Morningstar Rating metrics.

For each U.S.-domiciled fund with at least a three-year history, Morningstar calculates a Morningstar Rating based on a Morningstar Risk-Adjusted Return measure that accounts for variation in a fund’s monthly performance (including the effects of sales charges, loads and redemption fees), placing more emphasis on downward variations and rewarding consistent performance. The top 10% of funds in each category receive 5 stars, the next 22.5% receive 4 stars, the next 35% receive 3 stars, the next 22.5% receive 2 stars and the bottom 10% receive 1 star. (Each share class is counted as a fraction of one fund within this scale and rated separately, which may cause slight variations in the distribution percentages.) Morningstar data: © 2017 Morningstar, Inc. All rights reserved. The information contained herein is proprietary to Morningstar and/or its content providers; may not be copied or distributed; and is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.

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 4.75%. Had it been included, the Fund's return would have been lower.

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. Performance shown reflects an expense reimbursement that improved results. Load-adjusted returns are adjusted for the maximum front-end sales load of 2.25%* for Class A shares in the following funds: Convertible Fund, Global Convertible Fund, Market Neutral Income Fund, High Income Opportunities Fund, and Total Return Bond Fund. The maximum front-end sales load for Class A shares of all other funds is 4.75%. There is a 1% contingent deferred sales charge for C shares on certain redemptions within the first year of purchase. Class C shares have been adjusted for the contingent deferred sales charge (CDSC). There are no contingent deferred sales charges or distribution or service fees with respect to Class I shares. The minimum initial investment required to purchase each Fund's Class I shares is $1 million. Class I shares are offered primarily for direct investment by investors through certain tax-exempt retirement plans (including 401(k) plans, 457 plans, employer-sponsored 403(b) plans, profit sharing and money purchase pension plans, defined benefit plans and non-qualified deferred compensation plans) and by institutional clients, provided such plans or clients have assets of at least $1 million. Class I shares may also be offered to certain other entities or programs, including, but not limited to, investment companies, under certain circumstances. *Prior to 2/28/17, the Convertible Fund, Global Convertible Fund, Market Neutral Income Fund, and High Income Opportunities fund had a maximum front-end sales load of 4.75%, and the Total Return Bond Fund had a maximum front-end sales load of 3.75%.

The funds' gross expense ratios as of the prospectus dated 3/1/18 are as follows: Growth A 1.40%, C 2.15% and I 1.15%; Growth and Income A 1.12%, C 1.87% and I 0.87%; Opportunistic Value A 1.67%, C 2.42% and I 1.42%; Dividend Growth A 1.87%, C 2.73% and I 1.80%; Global Growth and Income A 1.54%, C 2.29% and I 1.29%; International Growth A 1.46%, C 2.21% and I 1.21%; Global Equity A 1.53%, C 2.27% and I 1.28%; Evolving World Growth A 1.67%, C 2.41% and I 1.41%; Emerging Market Equity A 2.70%, C 3.45% and I 2.45%; Convertible A 1.18%, C 1.93% and I 0.93%; Global Convertible A 1.46%, C 2.20% and I 1.19%; Market Neutral Income A 1.28%, C 2.03% and I 1.02%; Phineus Long/Short A 2.80%, C 3.55% and I 2.54%; Hedged Equity Income A 2.15%, C 3.04% and I 2.07%; High Income Opportunities A 1.33%, C 2.08% and I 1.08%; and Total Return Bond A 1.08%, C 1.83% and I 0.84%.  

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE

Before investing carefully consider the fund's investment objectives, risks, charges and expenses. Please see the prospectus containing this and other information or call 800-582-6959. Read it carefully.