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CALAMOS GROWTH AND INCOME FUND (CVTRX)

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Growth and Income Fund Opening

Effective January 2, 2013, the Calamos Growth and Income Fund and Calamos Global Growth and Income Fund are open for new accounts and new investments subject to prospectus guidelines. Please click here for a Q&A that discusses the reasons and details related to the action.

Investment Strategy

The fund invests in equity, convertible and fixed income securities issued by U.S. companies without regard to market capitalization. The fund utilizes these different types of securities to balance risk and reward in providing growth and income.


  • Active management blending global investment themes and fundamental research
  • Seeks to provide upside participation in equity markets with less exposure to downside than an equity-only portfolio over a full market cycle
  • Seeks to maintain a balance of risk and reward over a market cycle by investing in equity, convertible securities and fixed income

Fund Objective

The fund seeks high long-term total return through growth and current income.

Fund Benchmarks

  • S&P 500 Index
  • BofA ML All U.S. Convertible Ex Mandatory Index (V0A0)

 

Investment Process

The fund's investment team employs an investment process that considers global macro economic factors and investment themes. The team conducts both fundamental and quantitative research to evaluate the source, sustainability and risk of investment opportunities. The team manages a diversified portfolio monitoring and managing risk at the portfolio and individual security level.

Investment Team

John P. Calamos, Sr., Global Co-Chief Investment Officer and Gary D. Black, Global Co-Chief Investment Officer lead an integrated team of experienced investment professionals.

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 or call 1-800-582-6959. Read it carefully before investing.

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE

Calamos Financial Services LLC, Distributor

Low Volatility Equity: We consider a fund to have lower volatility when its beta versus the equity benchmark is less than one. For example, a beta of 0.70 means a fund’s returns are about 30% less volatile than its benchmark. As of 3/31/11, the since inception beta of the Calamos Growth and Income Fund was 0.71 vs. the S&P 500 Index. Source: Mellon Analytical Solutions LLC, Calamos Advisors LLC and State Street Corp. Beta is a measure of stock market correlation or risk. Fund data is based on A shares at NAV. Over the time period rated, these Funds have experienced negative performance. Please visit www.calamos.com for the most current performance information.

Important Fund 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 Growth and Income Fund include: convertible securities risk, synthetic convertible instruments risk, equity securities risk, growth stock risk, small and mid-sized company risk, interest rate risk, credit risk, high yield risk and portfolio selection risk.

NOTES

Annualized Standard Deviation-A statistical measure of the historical volatility of a mutual fund or portfolio, usually computed using 36 monthly returns. More generally, a measure of the extent to which numbers are spread around their average.

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 S&P 500 Index, while a beta of 2.0 reflects twice the market's volatility.

Bond Credit Quality-Reflects the higher of the ratings of Standard & Poor’s Corporation; Moody’s Investors Service, Inc. or Fitch, 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). In addition, CAL has assigned its own ranking to the “unrated bonds,” based on its fundamental and proprietary investment process and has years of experience actively managing risk. 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 www.calamos.com. Additional information on ratings methodologies are available by visiting the NRSRO websites: www.standardandpoors.com, www.moodys.com, and www.fitchratings.com.

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 Rate-The percentage rate at which a fund distributes income to its shareholders. It is calculated by dividing a fund's annual distributions by its current price; this figure can vary from the SEC yield of the same fund because of the multiple ways of treating different asset classes.

Merrill Lynch All U.S. Ex Mandatory Index-Represents the U.S. convertible market excluding mandatory convertibles. The index includes 660 issues with a total value of $227 billion.

PEG Ratio-Is 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 a 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 the current stock price over trailing 12‐month sales per share.

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.

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

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.

Value Line Convertible Index-Is an equally weighted index of the largest convertibles, representing 90% of the market.

The VIX, or CBOE Volatility Index, represents expected near-term volatility of the S&P 500 Index based on estimates by options market participants.

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.

† 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: © 2013 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.

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.

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 investment return of an investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost.

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. Class A shares load-adjusted returns are adjusted for the maximum front-end sales load of 4.75%. The Funds also offer Class B and C shares, the performance of which may vary. Performance shown reflects an expense reimbursement that improved results.

The Fund's gross expense ratio is 1.09% as of the prospectus dated 3/1/2013.

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.

Calendar Year Total Returns

AS OF 3/31/13

Annualized Total Returns

AS OF 3/31/13

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 or call 1-800-582-6959. Read it carefully before investing.

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE

Calamos Financial Services LLC, Distributor

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 9/30/88, since comparative index data is available only for full monthly periods. Source: State Street Corporation and Lipper, Inc.

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. As of the prospectus dated 3/1/11, the Fund’s gross expense ratios for Class A shares is 1.09%; Class B and C shares is 1.84%; Class I shares is 0.84%.

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.

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

† 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: © 2013 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.

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.

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 investment return of an investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost.

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. Class A shares load-adjusted returns are adjusted for the maximum front-end sales load of 4.75%. The Funds also offer Class B and C shares, the performance of which may vary. Performance shown reflects an expense reimbursement that improved results.

The Fund's gross expense ratio is 1.09% as of the prospectus dated 3/1/2013.

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.

Sector Weightings

AS OF 3/31/13
% of Assets S&P 500 Index
Information Technology 32.5% 18.1%
Financials 13.3% 15.9%
Energy 12.5% 10.9%
Health Care 10.9% 12.5%
Industrials 9.6% 10.1%
Consumer Discretionary 8.5% 11.6%
Consumer Staples 5.5% 11.0%
Materials 3.8% 3.4%
Utilities 0.5% 3.5%
Telecommunication Services 0.0% 3.0%
Index Options 0.0% 0.0%
Sovereign Bonds 0.0% 0.0%
Other 0.0% 0.0%

Asset Allocation

AS OF 3/31/13

Month-End Yield

AS OF 5/31/13
SEC Yield 0.64%
Distribution Rate 1.56%

Top 10 Holdings

Adobe Logo View All Holdings AS OF 3/31/13
Company Security Type Industry
%
QUALCOMM, Inc. Common Stock Communications Equipment 3.4%
Oracle Corp. Common Stock Systems Software 3.3%
Coca-Cola Company Common Stock Soft Drinks 3.0%
EMC Corp. Convertible Bonds Computer Storage & Peripherals 2.9%
United Technologies Corp. Convertible Preferred Stock Aerospace & Defense 2.7%
Apple, Inc. Common Stock Computer Hardware 2.6%
T. Rowe Price Group, Inc. Common Stock Asset Management & Custody Banks 2.2%
Accenture, PLC - Class A Common Stock IT Consulting & Other Services 2.2%
Amazon.com, Inc. Common Stock Internet Retail 2.2%
eBay, Inc. Common Stock Internet Software & Services 2.1%
Total 26.6%

Fund Facts

AS OF 3/31/13


Fund S&P 500 Index
Total Net Assets $3.8 billion --
# of Holdings 105 500
Duration 3.9 years --
Median Investment Premium 18.8% --
Median Conversion Premium 26.0% --
Turnover 41.8% --
Price/Book 3.0x 2.3x
Price/Earnings 15.9x 14.9x
Price/Sales 2.5x 1.4x
PEG Ratio 1.5x 1.7x
Debt/Capital 27.1% 35.6%
ROIC 19.8% 16.9%
Portfolio Turnover (12 months) 41.8% --

Market Capitalization

AS OF 3/31/13
> $63bil 66.1%
$18bil - $63bil 25.9%
$6bil - $18bil 8.0%
$2bil - $6bil 0.0%
< $2bil 0.0%

Regional Exposure

AS OF 3/31/13
North America 83.4%
Europe 11.2%
Asia/Pacific 1.3%
Latin America 1.0%
Caribbean 0.0%
Middle East/Africa 0.0%

Country Exposure

AS OF 3/31/13
United States 81.7%
Germany 3.6%
Ireland 2.2%
United Kingdom 1.8%
Canada 1.7%
France 1.6%
Denmark 1.5%
South Korea 1.3%
Brazil 1.0%
Sweden 0.5%

Currency Exposure

AS OF 3/31/13
United States Dollar (USD) 93.3%
Euro (EUR) 3.2%
Danish Krone (DKK) 1.6%
South Korean WON (KRW) 1.3%
Singapore Dollar (SGD) 0.6%

Credit Quality of Bonds

AS OF 3/31/13
AAA 0.0%
AA 3.4%
A 11.4%
BBB 31.3%
BB 23.6%
B 6.7%
CCC and below 0.0%
Unrated Securities 23.6%

Maturity Schedule

AS OF 3/31/13
Equities & Other 58.7%
1 To 5 Years 21.9%
5 To 10 Years 10.7%
< 1 Year 8.7%
10 To 20 Years 0.0%
20 To 30 Years 0.0%
> 30 Years 0.0%

Bond Duration

AS OF 3/31/13
Weighted Avg. Duration 3.9 years
Weighted Avg. Maturity 4.2 years

1Top 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.

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 or call 1-800-582-6959. Read it carefully before investing.

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE

Calamos Financial Services LLC, Distributor

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.

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.

Lipper Flexible Portfolio Funds—Funds that allocate their investments across various asset classes, including domestic common stocks, bonds, and money market instruments, with a focus on total return. BofA Merrill Lynch All U.S. Convertibles Ex Mandatory Index (V0A0)—Represents the U.S. convertible market excluding mandatory convertibles.

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

Value Line Convertible Index—Is an equally weighted index of the largest convertibles. 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.

Bond credit quality allocation reflects the higher of the ratings of Standards & Poor’s Corporation; Moody’s Investors Service, Inc. or Fitch, 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). In addition, CAL has assigned its own ranking to the “unrated bonds,” based on its fundamental and proprietary investment process and has years of experience actively managing risk. 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, www.moodys.com, and www.fitchratings.com.

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 Growth and Income Fund include: convertible securities risk, synthetic convertible instruments risk, equity securities risk, growth stock risk, small and mid-sized company risk, interest rate risk, credit risk, high yield risk and portfolio selection risk. 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.

† 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: © 2013 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.

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.

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 investment return of an investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost.

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. Class A shares load-adjusted returns are adjusted for the maximum front-end sales load of 4.75%. The Funds also offer Class B and C shares, the performance of which may vary. Performance shown reflects an expense reimbursement that improved results.

The Fund's gross expense ratio is 1.09% as of the prospectus dated 3/1/2013.

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.

Total Capital Gains

  
20110.0000
20100.0000
20090.0000
20080.0000

Schedule

   
Distributions Quarterly
Capital Gains Annually

Distributions

Choose a year  
Income Total Reinvest
1Q 2013 0.00000 0.00000 0.00000
4Q 2012 0.27421 0.27421 32.02000
3Q 2012 0.12749 0.12749 33.61000
2Q 2012 0.12395 0.12395 31.18000
1Q 2012 0.19330 0.19330 33.06000
4Q 2011 0.21467 0.21467 30.75000
3Q 2011 0.12720 0.12720 29.86000
2Q 2011 0.06928 0.06928 31.65000
1Q 2011 0.00000 0.00000 0.00000
4Q 2010 0.23798 0.23798 31.06000
3Q 2010 0.18600 0.18600 28.79000
2Q 2010 0.14660 0.14660 27.87000
1Q 2010 0.13178 0.13178 29.14000
4Q 2009 0.21373 0.21373 28.20000
3Q 2009 0.09750 0.09750 27.49000
2Q 2009 0.17558 0.17558 23.92000
1Q 2009 0.06213 0.06213 20.97000
4Q 2008 0.09263 0.09263 21.05000
3Q 2008 0.17186 0.17186 26.11000
2Q 2008 0.15863 0.15863 29.64000
1Q 2008 0.00000 0.00000 0.00000
Adobe Logo First Quarter Income Distributions

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.

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 or call 1-800-582-6959. Read it carefully before investing.

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE

Calamos Financial Services LLC, Distributor

† 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: © 2013 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.

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.

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 investment return of an investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost.

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. Class A shares load-adjusted returns are adjusted for the maximum front-end sales load of 4.75%. The Funds also offer Class B and C shares, the performance of which may vary. Performance shown reflects an expense reimbursement that improved results.

The Fund's gross expense ratio is 1.09% as of the prospectus dated 3/1/2013.

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.

Annual Expenses

A Shares B Shares C Shares I Shares
Total Expense Ratio1.091.841.840.84
Net Expense Ratio1.091.841.840.84
Transaction Fee0.000.000.000.00
Redemption Fee0.000.000.000.00

Investment Information

A Shares B Shares C Shares I Shares
Minimum initial investment$2,500$2,500$2,500$1 million
Minimum subsequent investments$50$50$50$0
IRA initial investments$500$500$500N/A

Fund Information

A Shares B Shares C Shares I Shares
Inception Date9/22/889/11/008/05/969/18/97
Ticker SymbolCVTRXCVTYXCVTCXCGIIX
CUSIP number128119104128119765128119831128119872

Sales & Distribution

A Shares B Shares C Shares I Shares
Sales loadFront-endBack-endLevel-loadN/A
Maximum Sales Charge4.75%5.00%1.00%N/A
US Bank Fund Number604611618628
DistributionsQuarterly dividends; annual capital gains

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.

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 or call 1-800-582-6959. Read it carefully before investing.

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE

Calamos Financial Services LLC, Distributor

† 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: © 2013 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.

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.

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 investment return of an investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost.

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. Class A shares load-adjusted returns are adjusted for the maximum front-end sales load of 4.75%. The Funds also offer Class B and C shares, the performance of which may vary. Performance shown reflects an expense reimbursement that improved results.

The Fund's gross expense ratio is 1.09% as of the prospectus dated 3/1/2013.

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.

Literature

Growth and Income Fund Quarterly Commentary A quarterly update of the Calamos Growth and Income Fund’s performance, positioning, related market commentary and outlook.
Calamos Growth and Income Fund Fact Sheet The Growth and Income Fund fact sheet provides a snapshot of the investment team, the fund strategy, performance, composition, ratings and returns.
Summary Prospectus (Class A, B, C) This summary contains important information about the Class A, B and C Growth and Income Fund investment objective, fees and expenses, principal investment strategies, principal risks and performance.
Summary Prospectus (Class I,R) This summary contains important information about the Class I and R Growth and Income Fund investment objective, fees and expenses, principal investment strategies, principal risks and performance.
Statutory Prospectus (Class A, B, C) You should read the accompanying prospectus and any accompanying prospectus supplement, which contain important information, before deciding whether to invest in our securities.
Statutory Prospectus (Class I, R) 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.
Semiannual 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.

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 or call 1-800-582-6959. Read it carefully before investing.

NOT FDIC INSURED | NO BANK GUARANTEE | MAY LOSE VALUE

Calamos Financial Services LLC, Distributor

† 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: © 2013 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.

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.

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 investment return of an investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost.

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. Class A shares load-adjusted returns are adjusted for the maximum front-end sales load of 4.75%. The Funds also offer Class B and C shares, the performance of which may vary. Performance shown reflects an expense reimbursement that improved results.

The Fund's gross expense ratio is 1.09% as of the prospectus dated 3/1/2013.

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.

Fund Details

As of 6/18/13
Inception Date:
9/22/88
Current NAV:
$33.62
$ Change:
$0.21
% Change:
0.62%
Net Assets*
3.8 bil
(*Total Net Assets as of 3/31/13)

Resources

Morningstar rated the Growth and Income A Fund among 802, 697 and 414 Aggressive Allocation funds for the overall rating and the 3-, 5-, and 10-year periods (as applicable) ending 3/31/13, respectively. 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 (if applicable) Morningstar Rating™ metrics.

Overall
3 Year
5 Year
10 Year

Calamos’ Morningstar style box is based on the portfolio’s overall targeted capitalization range and relative valuation as determined by Calamos Investments.

Morningstar rated the Growth and Income A Fund among 802, 697 and 414 Aggressive Allocation funds for the overall rating and the 3-, 5-, and 10-year periods (as applicable) ending 3/31/13, respectively. 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 (if applicable) Morningstar Rating™ metrics.