UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM N-CSR

                   CERTIFIED SHAREHOLDER REPORT OF REGISTERED
                         MANAGEMENT INVESTMENT COMPANIES


INVESTMENT COMPANY ACT FILE NUMBER:  811-09237

EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Advisors Trust

ADDRESS OF PRINCIPAL EXECUTIVE OFFICES:  1111 East Warrenville Road, Naperville,
                                         Illinois 60563

NAME AND ADDRESS OF AGENT FOR SERVICE:   James S. Hamman, Jr., Secretary,
                                         Calamos Asset Management,
                                         Inc., 1111 East Warrenville Road,
                                         Naperville, Illinois
                                         60563-1493

REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE:  (630) 245-7200

DATE OF FISCAL YEAR END:  December 31, 2003

DATE OF REPORTING PERIOD:  January 1, 2003 through December 31, 2003


                        Item 1. Reports to Stockholders


                                   CALAMOS(R)

                          STRATEGIES FOR SERIOUS MONEY(R)



                          GROWTH AND INCOME PORTFOLIO

                                  ANNUAL REPORT
                                DECEMBER 31, 2003


                           [CALAMOS INVESTMENTS LOGO]



                        CALAMOS FINANCIAL SERVICES, INC.
                            1111 E. Warrenville Road
                         Naperville, Illinois 60563-1463
                                  800.582.6959
                                 www.calamos.com

                       [CALAMOS INVESTMENTS LOGO]


CALAMOS GROWTH AND INCOME PORTFOLIO
A message from the President

Dear Contract Owners:

For the year ended December 31, 2003, the CALAMOS Growth and Income Portfolio,
offered through the Kansas City Life Century II Variable Products, gained
25.76%* nearly in line with the gain of the S&P 500 index(1), which returned
28.68%, and outpaced the Value Line Convertible Index(2), which returned 24.22%.

As we mentioned in a letter earlier in the year, the name of the Portfolio has
been changed from the CALAMOS Convertible Portfolio to the CALAMOS Growth and
Income Portfolio. This change was made to permit us to follow the same strategy
the Portfolio has utilized since its inception in various market cycles and
remain in conformity with SEC regulations. Rest assured that there has been no
change in our investment approach as a result of this name change. More details
on the Portfolio's investment process can be found in the enclosed Management
Review & Outlook.

Going back to 2002, we saw the CALAMOS Growth and Income Portfolio perform as
intended on the downside, limiting losses relative to the equity market and to
the broad convertible market as well. In 2003, the CALAMOS Growth and Income
Portfolio again performed as expected, this time on the upside. We managed to
capture nearly 90% of the stock market's gains while still maintaining a much
more conservative risk/reward profile, and the Portfolio once again outperformed
the broad convertible market.

For more than 25 years of up and down markets, CALAMOS INVESTMENTS has helped
investors achieve their long-term financial goals with a disciplined convertible
investment strategy. We are glad to be part of the Century II lineup, and we
thank you for your ongoing investment in the CALAMOS Growth and Income
Portfolio.


Sincerely,


- ----------------------------
/s/ John P. Calamos, Sr.
John P. Calamos, Sr.
Chairman, Chief Executive Officer and Chief Investment Officer
CALAMOS ASSET MANAGEMENT, INC.
January 15, 2004



In addition to market risk, there are certain risks associated with an
investment in a convertible bond such as default risk (risk that the company
issuing a convertible security will be unable to repay principal and interest)
and interest rate risk (risk that the security may decrease in value if interest
rates increase).

PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS.

(1) The S&P 500 Stock Index is an unmanaged index generally considered
representative of the U.S. stock market.
(2) The Value Line Convertible Index is an equally weighted index of the largest
585 convertibles. Selection is based on issue size and trading statistics. The
index represents 90% of the market. Source: Russell/Mellon Analytical Services.
(*) Net of all fees and expenses charged by Calamos Asset Management, Inc.

This report has been prepared by CALAMOS ASSET MANAGEMENT INC. (CAM), the
Portfolio's adviser, for information purposes; any opinions expressed herein
reflect our judgment as of this date and are subject to change at any time
without notice. The forecasts may not prove true. This report should be preceded
or accompanied by a prospectus. Please read the prospectus carefully before you
invest or send money.




MANAGEMENT REVIEW & OUTLOOK

WHAT IS THE GROWTH AND INCOME PORTFOLIO AND WHO SHOULD INVEST IN IT?

To begin, it should be noted that in 2003, the name of the Portfolio was changed
from the CALAMOS Convertible Portfolio to the CALAMOS Growth and Income
Portfolio to permit us to follow the same strategy the Portfolio has utilized
since its inception in various market cycles and remain in conformity with SEC
regulations.

The Growth and Income Portfolio still dynamically allocates among stocks,
corporate bonds and convertible securities. The Portfolio attempts to keep a
consistent balance between risk and reward over the course of the market cycle.
As the market environment alters, CALAMOS ASSET MANAGEMENT, INC. will change the
blend of securities to keep the risk level consistent over time. At some points
in the market cycle, the use of one type of security may make up a substantial
portion of the portfolio, while at other times a given security type may have
minimal or no representation, depending on market conditions.

As before, the Portfolio will make use of convertible securities, a type of
investment `hybrid' which combines the upside potential of equities with
potential downside protection provided by bonds. The potential equity upside
growth comes from the option to convert the security into a specified number of
shares of common stock as the issuing company grows. The potential bond downside
protection comes from the regular income a convertible security generally pays
before the option is exercised. The Portfolio uses convertibles because they fit
well with its investment objective: high long-term total return through growth
and current income.

There are instances in which the Portfolio may hold fewer convertibles in order
to maintain its desired balance between risk and reward. For example, at times
the Portfolio may be invested more heavily in equities, while at other times it
may contain more "straight" bonds (bonds that, unlike convertibles, do not
include the option to be exchanged for stock).

Thus, despite its name change, the Portfolio remains appropriate for investors
who seek the potential to participate in a significant part of the stock
market's gains but who are also concerned about preserving their capital during
a downturn.

WHAT FACTORS HAD A SIGNIFICANT IMPACT ON THE CALAMOS GROWTH AND INCOME
PORTFOLIO?

In 2003, security selection in Technology, the sector weighting in Energy, and
both selection and sector weightings in Consumer Growth Staples enhanced
Portfolio performance, relative to the benchmark. On the other hand, security
selection in Utilities, sector weightings in Consumer Cyclicals, and both
security selection and sector weightings in Telecommunications and Basic
Industries detracted from performance for the year.

Adhering to our investment discipline did hold back the Portfolio somewhat, as
more speculative securities, generally of lower credit quality, and of smaller
and sometimes distressed businesses, outperformed securities issued by companies
which, in our opinion, had much stronger balance sheets and much more
sustainable growth rates. For example, during the fourth quarter, the
Portfolio's weightings and security selection among small caps, and its
selections in the BB credit quality range detracted on a relative basis from its
return.

Looking forward, we believe that the market will recognize the value of more
stable, steadily growing businesses and rotate toward names with an appropriate
risk/reward balance. Already in the fourth quarter, we saw evidence that the
market had started to recognize higher-quality names in the large-cap arena,
where our security selection added value. Likewise, among the higher-rated
credits in the BBB and A range, careful choices boosted returns relative to the
benchmark.

Believing that, in the long run, the best way to enhance an investor's capital
is not to lose any, our strategy will generally keep us from participating in
any rapid run-up, such as we saw in the fourth quarter, but we seek to recover
those gains and then some in more normal market conditions.





WHAT IS THE OUTLOOK FOR THE CALAMOS GROWTH AND INCOME PORTFOLIO?

After three straight years of negative returns from the broad stock market, many
investors began 2003 too hesitant to get back into the market. Our outlook
throughout 2003 was positive, however, believing that the negative sentiments
which deterred many investors - the high levels of consumer debt and
correspondingly low levels of personal savings; the immediate fears of terrorism
and the long-term effects of the war in Iraq, the trade deficit, and the general
worry about valuations - were overstated.

Our view throughout 2003 was that it was rational for individuals to invest in
their own homes, rather than saving, given the respective rates of return
offered by each choice (roughly 6% and less than 1%, respectively). Our response
to war, terrorism, or other dangers was, as always, to diversify. The trade
deficit reflected, and in our view continues to reflect, the willingness of
foreigners to invest in the United States, which they regard as a safer and
potentially more lucrative than any alternative. Finally, the worry about
valuations came from mistakenly assuming that the whole market was caught up in
a price bubble, when in fact only about a third of the market was really
overheated.

What's more, we continue to regard discussions about the valuation of "the
market" as misleading for two reasons. First, as active managers, we purchase
individual securities, not broad groups or the whole market. Second, we look at
free cash flow, rather than earnings (the denominator in the overused--and
misused-- Price-to-Earnings ratio). For more than 25 years, we have treated free
cash flow, or simply what a company has left after it has satisfied all of its
outstanding liabilities, as a more accurate representation of its ability to
make money than earnings, which can be manipulated.

Our study of individual companies' cash flows leads us to those which are
earning a high return on invested capital as a result of having restructured
their businesses over the past several years. Now, with capital expenditures
increasing, companies that can generate strong returns on this additional level
of investment will grow strongly. Our current portfolio weightings and security
selections favor these steadily growing companies.

In sum, we believe that the recovery is real, that the stimulus provided by the
tax cuts will persist throughout 2004, and that the market will continue to
rotate toward selected firms with strong balance sheets, high returns on
invested capital, and genuine prospects of long-term growth, and the makeup of
the Portfolio reflects these convictions.






CALAMOS GROWTH AND INCOME PORTFOLIO
Average Annual Total Return* as of 12/31/03



                  SINCE INCEPTION                  ONE YEAR                   THREE YEAR
                (5/19/99-12/31/03)
           -----------------------------------------------------------------------------------------
                                                                        
                       9.08%                        25.76%                       4.69%
           Returns are net of all fees and expenses incurred by the Portfolio.


PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. The investment return and
principal value of an investment will fluctuate so that an investor's shares,
when redeemed, may be worth more or less than their original cost. Due to
ongoing market volatility, performance is subject to substantial short-term
fluctuations.

*Average annual total 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. Note: Without expense limits, the
Portfolio's total return would have been lower.



CALAMOS GROWTH AND INCOME PORTFOLIO
Growth of a $10,000 Investment
5/19/99 to 12/31/03


               CALAMOS Grw & Inc Portfolio (Advisor Tr)(Monthly)
                                  [Line Graph]



                                                 Calamos Growth                            Value Line
                                              and Income Portfolio                      Convertible Index
               Beginning                              10000                                   10000
                                                                               
          1999       9/30/1999                     9776.462364                             9898.706043
                    12/31/1999                     11972.24435                             10914.83261
          2000       3/31/2000                     12493.85686                             11667.71879
                     6/30/2000                     12436.66107                             11031.10348
                     9/30/2000                     13312.38312                             11080.65993
                    12/31/2000                     12656.55061                             9790.507457
          2001       3/31/2001                     11926.48316                             9580.419609
                     6/30/2001                     12288.31038                             10380.83886
                     9/30/2001                     11245.61834                             9396.755385
                    12/31/2001                     12040.19791                              10042.0335
          2002       3/31/2002                     12340.51001                             10122.24352
                     6/30/2002                     12042.38069                             9399.588128
                     9/30/2002                     10997.49065                             8725.680232
                    12/31/2002                     11545.78081                             9538.444606
          2003       3/31/2003                     11616.66625                             9980.998768
                     6/30/2003                     13058.86706                             11052.80848
                     9/30/2003                     13353.65519                             11037.64997
                    12/31/2003                     14516.72188                              11848.4806



SOURCE: RUSSELL/MELLON ANALYTICAL SERVICES, INC.

This chart compares the Portfolio's performance to that of the Value Line
Convertible Index with net distribution over time. This index is an unmanaged
broad-based statistical composite and its performance does not include sales
charges or fees that would be paid by an investor purchasing the securities it
represents. Such costs would lower performance. The historical performance of
the index is shown for illustrative purposes only; it is not meant to forecast,
imply or guarantee the future performance of any investment vehicles. It is not
possible to invest directly into an index. Results are hypothetical.

Inception of the Portfolio is 5/19/99.  Value Line Investment begins 5/1/99.












PORTFOLIO MANAGERS



[JOHN P. CALAMOS, SR. PHOTO] JOHN P. CALAMOS, SR.
                             Chairman, Chief Executive Officer and Chief
                             Investment Officer

         -        Over 30 years of investment management experience
         -        Authority on convertibles, listed call options and other
                  hedging techniques
         -        Authored two books on convertible investing, the latest:
                  Convertible Securities, the Latest Instruments, Portfolio
                  Strategies and Valuation Analysis, 1998
         -        Member of the Investment Analysts Society of Chicago
         -        BS Economics - Illinois Institute of Technology
         -        MBA Finance - Illinois Institute of Technology



[NICK P. CALAMOS, CFA PHOTO] NICK P. CALAMOS, CFA
                             Senior Executive Vice President, Head of
                             Investments and Chief Investment Officer

         -        Approximately 20 years of investment management experience
         -        Oversees research and portfolio management for the firm
         -        Author: Convertible Arbitrage, Insights and Techniques for
                  Successful Hedging
         -        Member of the Investment Analysts Society of Chicago
         -        Chartered Financial Analyst
         -        BS Economics - Southern Illinois University
         -        MS Finance - Northern Illinois University


                 CALAMOS GROWTH AND INCOME PORTFOLIO

SCHEDULE OF INVESTMENTS DECEMBER 31, 2003



    PRINCIPAL                                                           PRINCIPAL
     AMOUNT                                                VALUE         AMOUNT                                          VALUE
- -------------------------------------------------------------------   ------------------------------------------------------------
                                                                                                        
Convertible Bonds (55.1%)                                               $225,000  International Game Technology (b)
                CAPITAL GOODS - INDUSTRIAL (9.0%)                                 0.000%,  01/29/33                       $180,281
     $100,000   Agco Corp.                                               400,000  Lear Corp. (b)
                1.750%,  12/31/33                          $111,875               0.000%,  02/20/22                        210,500
      135,000   Briggs & Stratton Corp. (b)                              660,000  Royal Caribbean Cruises, Ltd.
                5.000%,  05/15/06                           187,144               0.000%,  02/02/21                        320,100
                General Motors Corp. (c)                                 260,000  Walt Disney Company
      375,000   5.250%,  03/06/32                           403,050               2.125%,  04/15/23                        276,575
                                                                                                                       ------------
      142,500   6.250%,  07/15/33                           184,110                                                      1,647,050
                                                                                                                       ------------
      185,000   Kaydon Corp. (b)                                                  CONSUMER GROWTH STAPLES (13.8%)
                4.000%,  05/23/23                           207,200       55,000  AmerisourceBergen Corp. (b)
                Tyco International, Ltd. (b)                                      5.000%,  12/01/07                         66,275
      385,000   3.125%,  01/15/23                           528,413      150,000  Cendant Corp.
      310,000   2.750%,  01/15/18                           397,186               3.875%,  11/27/11                        162,750
                                                         -----------
                                                          2,018,978      210,000  Hasbro, Inc. (b)
                                                         -----------
                CAPITAL GOODS - TECHNOLOGY (14.1%)                                2.750%,  12/01/21                        247,800
      110,000   Advanced Micro Devices, Inc.                             355,000  Invitrogen Corp. (b)
                4.750%,  02/01/22                           112,750               2.000%,  08/01/23                        442,863
      400,000   Agilent Technologies, Inc.                                        Liberty Media Corp. (Time Warner)
                3.000%,  12/01/21                           439,000      200,000  0.750%,  03/30/23 (b)                    237,000
      136,000   First Data Corp.                                         100,000  0.750%,  03/30/23                        118,500
                2.000%,  03/01/08                           147,900      165,000  Liberty Media Corp. (Viacom, Inc.)
      390,000   Juniper Networks, Inc. (b)                                        3.250%,  03/15/31                        172,425
                0.000%,  06/15/08                           453,375      145,000  Pharmaceutical Resources, Inc. (b)
      110,000   Keane, Inc.                                                       2.875%,  09/30/10                        160,225
                2.000%,  06/15/13                           115,984       45,000  Quanta Services, Inc.
      110,000   Kulicke and Soffa Industries, Inc.                                4.500%,  10/01/23                         47,475
                0.500%,  11/30/08                           106,150      240,000  Reebok International, Ltd. (b)
      180,000   Liberty Media Corp. (Motorola) (b)                                4.250%,  03/01/21                        264,600
                3.500%,  01/15/31                           151,650      545,000  Roche Holdings, Inc. (Genentech) (b)
      185,000   LSI Logic Corp. (b)                                               0.000%,  01/19/15                        446,219
                4.000%,  05/15/10                           206,506      225,000  Teva Pharmaceutical Industries, Ltd.
      200,000   L-3 Communications Holdings                                       0.375%,  11/15/22                        313,313
                5.250%,  06/01/09                           253,500      315,000  Watson Pharmaceuticals, Inc. (b)
      160,000   Micron Technology, Inc.                                           1.750%,  03/15/23                        416,192
                                                                                                                       ------------
                2.500%,  02/01/10                           212,400                                                      3,095,637
                                                                                                                       ------------
       65,000   Photronics, Inc. (b)                                              CONSUMER STAPLES (1.6%)
                4.750%,  12/15/06                            64,675      100,000  Bunge, Ltd (b)
      390,000   STMicroelectronics N.V.                                           3.750%,  11/15/22                        117,125
                0.000%,  07/05/13                           419,738      340,000  General Mills, Inc. (b)
      125,000   Symantec Corp.                                                    0.000%,  10/28/22                        239,700
                                                                                                                       ------------
                3.000%,  11/01/06                           257,031                                                        356,825
                                                                                                                       ------------
      185,000   Veritas Software Corp. (b)                                        ENERGY (2.4%)
                0.250%,  08/01/13                           202,574       90,000  Halliburton Company, Inc. (b)
                                                         -----------
                                                          3,143,233               3.125%,  07/15/23                         93,713
                                                         -----------
                CONSUMER CYCLICAL (7.4%)                                 240,000  Nabors Industries, Inc.
      200,000   Best Buy Company, Inc.                                            0.000%,  06/15/23                        221,700
                0.684%,  06/27/21                           151,250      225,000  Schlumberger, N.V.
       50,000   Church & Dwight Co., Inc. (b)                                     2.125%,  06/01/23                        223,594
                                                                                                                       ------------
                5.250%,  08/15/33                            58,625                                                        539,007
                                                                                                                       ------------
      300,000   Four Seasons Hotels, Inc.                                         FINANCIAL (2.7%)
                0.000%,  09/23/29                           103,500      169,000  Providian Financial Corp.
                Gap, Inc.                                                         4.000%,  05/15/08                        196,040
      140,000   5.750%,  03/15/09 (b)                       215,425      300,000  Select Insurance Group (b)
       85,000   5.750%,  03/15/09                           130,794               1.616%,  09/24/32                        143,250




               See accompanying Notes to Schedule of Investments




                      CALAMOS GROWTH AND INCOME PORTFOLIO

SCHEDULE OF INVESTMENTS DECEMBER 31, 2003



 PRINCIPAL                                                          NUMBER OF
  AMOUNT                                              VALUE         SHARES                                                VALUE
- ---------------------------------------------------------------   ------------------------------------------------------------------
                                                                                                         
  $85,000   Silicon Valley Bancshares (b)                                    ENERGY (1.8%)
            0.000%,  06/15/08                         $100,406        3,700  Kerr-McGee Corp. (Devon)
  171,250   Travelers Property Casualty Corp. (c)                            5.500%                                        $184,630
            0.000%,  04/15/32                          168,853        8,400  Valero Energy Corp.
                                                    -----------
                                                       608,549               2.000%                                         216,300
                                                    -----------                                                         ------------
            TELECOMMUNICATIONS (3.9%)                                                                                       400,930
                                                                                                                        ------------
  180,000   Andrew Corp. (b)                                                 FINANCIAL (2.6%)
            3.250%,  08/15/13                          212,625        3,550  Commerce Capital Trust II (b)
  170,000   Comverse Technology, Inc. (b)                                    5.950%                                         213,000
            0.000%,  05/15/23                          200,600        3,475  National Australia Bank, Ltd.
   66,000   Corning, Inc.                                                    7.875%                                         132,745
            3.500%,  11/01/08                           82,088        1,000  Reinsurance Group of America, Inc.
  100,000   Nextel Communications, Inc.                                      5.750%                                          58,625
            6.000%,  06/01/11                          124,500          775  State Street Corp.
  145,000   UTStarcom, Inc. (b)                                              6.750%                                         188,310
                                                                                                                        ------------
            0.875%,  03/01/08                          247,406                                                              592,680
                                                    -----------                                                         ------------
                                                       867,219               TELECOMMUNICATIONS (1.4%)
                                                    -----------
                                                                      5,300  ALLTEL Corp.
            UTILITIES (0.2%)                                                 7.750%                                         263,410
   50,000   CenterPoint Energy, Inc. (b)                              1,000  General Cable Corp. (b)
            3.750%,  05/15/23                           53,375               5.750%                                          58,875
                                                    -----------                                                         ------------
                                                                                                                            322,285
                                                                                                                        ------------
            TOTAL CONVERTIBLE BONDS                                          UTILITIES (0.6%)
            (Cost $10,993,857)                      12,329,873        4,200  CenterPoint Energy, Inc. (Time Warner)
                                                    -----------
                                                                             2.000%                                         135,492
                                                                                                                        ------------
    NUMBER OF
      SHARES                                              VALUE                       TOTAL CONVERTIBLE
- ------------------------------------------------------------------
CONVERTIBLE PREFERRED STOCK (19.0%)                                                   PREFERRED STOCK
            CAPITAL GOODS - INDUSTRIAL (2.5%)                                (Cost $3,636,103)                            4,260,662
                                                                                                                        ------------
   10,000   Ford Motor Company Capital Trust II
            6.500%                                     558,500       COMMON STOCK (23.8%)
                                                    -----------
            CAPITAL GOODS - TECHNOLOGY (2.7%)                                CAPITAL GOODS - TECHNOLOGY (9.5%)
    4,400   Motorola, Inc.                                           17,400  Brooks Automation, Inc. (a)                    420,558
            7.000%                                     191,092       22,500  Cisco Systems, Inc. (a)                        546,525
      650   Northrop Grumman Corp.                                   10,100  Cypress Semiconductor Corp. (a)                215,736
            7.250%                                      67,405        4,800  Electronic Arts, Inc. (a)                      229,344
    2,650   Xerox Corp.                                              30,900  EMC Corp. (a)                                  399,228
            6.250%                                     344,500        9,400  Intel Corp.                                    302,680
                                                    -----------                                                         ------------
                                                       602,997                                                            2,114,071
                                                    -----------                                                         ------------
            CONSUMER GROWTH STAPLES (4.1%)
    2,100   Anthem, Inc.                                                     CONSUMER CYCLICAL (2.7%)
            6.000%                                     185,283        8,000  International Game Technology                  285,600
    7,800   Baxter International, Inc.                                3,000  Nordstrom, Inc.                                102,900
            7.000%                                     430,950        9,300  Walt Disney Company                            216,969
                                                                                                                        ------------
    5,800   Cendant Corp.                                                                                                   605,469
                                                                                                                        ------------
            7.750%                                     290,348               CONSUMER GROWTH STAPLES (4.5%)
                                                    -----------
                                                       906,581        2,200  Bausch & Lomb, Inc.                            114,180
                                                    -----------
            CREDIT CYCLICAL (3.3%)                                   11,800  McDonald's Corp.                               292,994
    3,000   New York Community Capital Trust V                        2,900  Merck & Company, Inc.                          133,980
            6.000%                                     229,125        9,000  Mylan Laboratories, Inc.                       227,340
            Washington Mutual, Inc.                                   4,600  Neiman Marcus Group, Inc. (a)                  246,882
                                                                                                                        ------------
    5,300   5.375% (b)                                 294,998                                                            1,015,376
                                                                                                                        ------------
    3,900   5.375%                                     217,074
                                                    -----------
                                                       741,197
                                                    -----------




               See accompanying Notes to Schedule of Investments






                 CALAMOS GROWTH AND INCOME PORTFOLIO

SCHEDULE OF INVESTMENTS DECEMBER 31, 2003



  NUMBER OF                                                    PRINCIPAL
   SHARES                                         VALUE         AMOUNT                                              VALUE
- ---------------------------------------------------------   ------------------------------------------------------------------
                                                                                               
              FINANCIAL (5.3%)                              SHORT TERM INVESTMENTS (16.7%)
      3,733   Countrywide Financial Corp.     $  283,173           $  482,000  Exxon Mobil Corp.
      7,100   MBIA, Inc.                         420,533                       0.770%,  01/02/04                 $   482,000
     20,274   Sovereign Bancorp, Inc.            481,508            3,245,101  Bank of New York Institutional
                                              -----------
                                               1,185,214                       Cash Reserve Fund (d),
                                              -----------
              TELECOMMUNICATIONS (1.8%)                                        current rate 1.140%                  3,245,101
                                                                                                                  -----------
     31,000   Avaya, Inc. (a)                    401,140
                                              -----------
                                                                               TOTAL SHORT TERM
              TOTAL COMMON STOCK                                               INVESTMENTS
              (Cost $4,285,535)                5,321,270                       (Cost $3,727,101)                    3,727,101
                                              -----------                                                         -----------

                                                                   TOTAL INVESTMENTS (114.6%)                      25,638,906
                                                                                                                  -----------
                                                                   (Cost $22,642,596)
                                                                   LIABILITIES, LESS OTHER ASSETS (-14.6%)         (3,271,267)
                                                                                                                  -----------
                                                                   NET ASSETS (100.0%)                            $22,367,639
                                                                                                                  -----------



NOTES TO SCHEDULE OF INVESTMENTS

(a)  Non-income producing security.
(b)  144A securities are those that are exempt from registration under Rule 144A
     of the Securities Act of 1933, as amended. These securities are generally
     issued to qualified institutional buyers ("QIBs"), such as the Portfolio.
     Any resale of these securities must generally be effected through a sale
     that is exempt from registration (e.g. a sale to another QIB), or the
     security must be registered for public sale. At December 31, 2003 the
     market value of 144A securities that can not currently be exchanged to the
     registered form is $1,941,219 or 8.7% of net assets of the Portfolio.
(c)  Security trades at a price that takes into account the value, if any, of
     accrued but unpaid interest.
(d)  Security is purchased with the cash collateral from securities loaned.


           See accompanying Notes to Financial Statements

                       CALAMOS GROWTH AND INCOME PORTFOLIO

STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 2003




                                                                                       
ASSETS
 Investments, at value (cost $22,642,596) - including $3,167,268 of securities loaned      $    25,638,906
 Cash with custodian (interest bearing)                                                            115,659
 Accrued interest, dividends and other receivables                                                  74,929
 Receivable for Fund shares sold                                                                     1,212
 Other assets                                                                                       17,654
                                                                                           ---------------
             Total Assets                                                                       25,848,360
                                                                                           ===============

LIABILITIES AND NET ASSETS
 Payable for investments purchased                                                                 176,581
 Payable for Fund shares redeemed                                                                    8,461
 Payable to investment advisor                                                                      13,793
 Accounts payable and accrued liabilities                                                           36,785
 Payable upon return of securities loaned                                                        3,245,101
                                                                                           ---------------
            Total Liabilities                                                                    3,480,721
                                                                                           ---------------
NET ASSETS                                                                                 $    22,367,639
                                                                                           ===============

ANALYSIS OF NET ASSETS
Paid in Capital                                                                            $    20,733,072
Undistributed net investment income (loss)                                                         100,941
Accumulated net realized gain (loss) on investments                                             (1,462,684)
Unrealized appreciation (depreciation) of investments                                            2,996,310
                                                                                           ---------------
NET ASSETS                                                                                 $    22,367,639
                                                                                           ===============


Net Assets Applicable to Shares Outstanding                                                $    22,367,639
Shares Outstanding                                                                               1,755,118
Net Asset Value and Redemption Price Per Share                                             $         12.74
                                                                                           ===============





                 See accompanying Notes to Financial Statements





                       CALAMOS GROWTH AND INCOME PORTFOLIO


STATEMENT OF OPERATIONS
FOR YEAR ENDED DECEMBER 31, 2003




                                                                              
INVESTMENT INCOME
Interest                                                                         $       450,437
Dividends                                                                                387,522
Securities lending income                                                                  4,155
                                                                                 ---------------
   Total investment income                                                               842,114
                                                                                 ---------------

EXPENSES
Investment advisory fees                                                                 138,052
Accounting fees                                                                           23,024
Audit and legal fees                                                                      79,055
Custodian fees                                                                             8,569
Transfer agent fees                                                                        4,840
Trustees' fees                                                                            21,693
Other                                                                                     17,646
                                                                                 ---------------
   Total Expenses                                                                        292,879
Less Expense waived                                                                       22,985
                                                                                 ---------------
   Net Expenses                                                                          269,894
                                                                                 ---------------
NET INVESTMENT INCOME (LOSS)                                                             572,220
                                                                                 ---------------


REALIZED AND UNREALIZED GAIN (LOSS)
Net realized gain (loss) on investments                                                  382,534
Change in net unrealized appreciation/depreciation on investments                      3,323,544
                                                                                 ---------------
NET GAIN (LOSS) ON INVESTMENTS                                                         3,706,078
                                                                                 ---------------
NET INCREASE (DECREASE) IN NET ASSETS
   RESULTING FROM OPERATIONS                                                     $     4,278,298
                                                                                 ===============


                 See accompanying Notes to Financial Statements




                       CALAMOS GROWTH AND INCOME PORTFOLIO

STATEMENTS OF CHANGES IN NET ASSETS
YEARS ENDED DECEMBER 31, 2003 AND 2002




                                                                                      YEAR ENDED
                                                                                     DECEMBER 31,
                                                                              2003                  2002
                                                                        ---------------        ---------------
                                                                                         
OPERATIONS
Net investment income (loss)                                            $       572,220        $       613,431
Net realized gain (loss) on investments, options                                382,534               (750,644)
Change in net unrealized appreciation/depreciation on investments             3,323,544               (545,919)
                                                                        ---------------        ---------------
Net increase(decrease) in net assets resulting from operations                4,278,298               (683,132)
                                                                        ---------------        ---------------


DISTRIBUTIONS TO SHAREHOLDERS
Net investment income                                                          (611,634)              (529,483)
Net realized gains                                                                    -                      -
                                                                        ---------------        ---------------
          Total Distributions                                                  (611,634)              (529,483)

NET INCREASE IN NET ASSETS FROM
   CAPITAL SHARE TRANSACTIONS                                                 2,837,578              1,971,727
                                                                        ---------------        ---------------


TOTAL INCREASE IN NET ASSETS                                                  6,504,242                759,112
                                                                        ---------------        ---------------


NET ASSETS
Beginning of period                                                          15,863,397             15,104,285
                                                                        ---------------        ---------------
End of period                                                           $    22,367,639        $    15,863,397
                                                                        ===============        ===============


Undistributed Net Investment Income/(loss)                              $       100,941        $       198,971




                 See accompanying Notes to Financial Statements



                          NOTES TO FINANCIAL STATEMENTS

NOTE 1 - ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES

ORGANIZATION - CALAMOS ADVISORS TRUST, a Massachusetts business trust organized
February 17, 1999 (the "Trust"), consists of a single series, CALAMOS Growth and
Income Portfolio (the "Portfolio"). The Trust currently offers the Portfolio's
shares to certain life insurance companies for allocation to certain separate
accounts established for the purpose of funding qualified and non-qualified
variable annuity contracts and variable life insurance contracts. The Portfolio
commenced investment operations on May 19, 1999. The Portfolio seeks current
income as its primary objective with capital appreciation as its secondary
objective.

PORTFOLIO VALUATION - In computing the net asset value of the Portfolio,
securities, including options, that are traded on a national securities exchange
are valued at the last reported sales price. Securities quoted on the NASDAQ
National Market System are valued at the NASDAQ Official Closing Price ("NOCP"),
as determined by NASDAQ, or lacking an NOCP, the last current reported sale
price as of the time of valuation. Securities traded in the over-the-counter
market and listed securities for which no sales were reported are valued at the
mean of the most recently quoted bid and asked prices. Short-term obligations
with maturities of 60 days or less are valued at amortized cost, which
approximates market value.

When market quotations are not readily available or when the valuation methods
mentioned above are not reflective of the fair value of the security, the
security is valued at a fair value following procedures approved by the Board of
Trustees or a committee thereof. These procedures may utilize valuations
furnished by pricing services approved by the Board of Trustees or a committee
thereof, which may be based on market transactions for comparable securities and
various relationships between securities that are generally recognized by
institutional traders, a computerized matrix system, or appraisals derived from
information concerning the securities or similar securities received from
recognized dealers in those securities.

Securities that are principally traded in a foreign market are valued as of the
close of the appropriate exchange or other designated time. Trading in
securities on European and Far Eastern securities exchanges and over-the-counter
markets is normally completed at various times before the close of business on
each day on which the New York Stock Exchange ("NYSE") is open. Trading of these
securities may not take place on every NYSE business day. In addition, trading
may take place in various foreign markets on Saturdays or on other days when the
NYSE is not open and on which the Fund's net asset value is not calculated.

INVESTMENT TRANSACTIONS AND INVESTMENT INCOME - Short term investment
transactions are recorded on a trade date basis. Long term investment
transactions are recorded on a trade date plus one basis, except for June 30th
and December 31st, which are recorded on trade date. Realized gains and losses
from investment transactions are recorded on an identified cost basis. Interest
income is recognized using the accrual method and includes accretion of original
issue and market discount and amortization of premium. Dividend income is
recognized on the ex-dividend date, except that certain dividends from foreign
securities are recorded as soon as the information becomes available.

FEDERAL INCOME TAXES - No provision has been made for Federal income taxes since
the Portfolio is taxed as a "regulated investment company" under Subchapter M of
the Internal Revenue Code of 1986 and has made such distributions to
shareholders as to be relieved of all Federal income taxes.

DIVIDENDS - Dividends payable to shareholders are recorded on the ex-dividend
date. Income and capital gain dividends are determined in accordance with income
tax regulations, which may differ from accounting principles generally accepted
in the United States. These differences are primarily due to differing
treatments for foreign currency transactions and contingent payment debt
instruments.

USE OF ESTIMATES - The preparation of financial statements in conformity with
accounting principles generally accepted in the United States requires
management to make estimates and assumptions that affect the amounts reported in
the financial statements and accompanying notes. Actual results may differ from
those estimates.




                          NOTES TO FINANCIAL STATEMENTS

NOTE 2 - INVESTMENT ADVISOR AND TRANSACTIONS WITH AFFILIATES

Pursuant to an investment advisory agreement with CALAMOS ASSET MANAGEMENT, INC.
("CAM"), the Portfolio pays an investment advisory fee at the annual rate of
0.75% of the average daily net assets of the Portfolio.

CAM has undertaken to limit normal operating expenses of the Portfolio to 1.00%
of average daily net assets through May 31, 2003. As of June 1, 2003, CAM
discontinued such waiver of expenses for the Portfolio. For the year ended
December 31, 2003, CAM waived expenses of $22,985.

Certain portfolio transactions for the Portfolio can be executed through CALAMOS
FINANCIAL SERVICES, INC. ("CFS") as broker, consistent with the Portfolio's
policy of obtaining best price and execution. During the year ended December 31,
2003, the Portfolio paid no brokerage commissions to CFS on purchases and sales
of portfolio securities.

Certain officers and trustees of the Trust are also officers and directors of
CFS and CAM. All officers and affiliated trustees serve without direct
compensation from the Trust.

The Portfolio has adopted a deferred compensation plan (the "Plan"). Under the
Plan, a Trustee who is not an "interested person" of CAM and has elected to
participate in the Plan (a "participating trustee") may defer receipt of all or
a portion of his compensation from the Portfolio. The deferred compensation
payable to the participating trustee is credited to the trustee's deferral
account as of the business day such compensation would have been paid to the
trustee. The value of a trustee's deferred compensation account at any time is
equal to what would be the value if the amounts credited to the account had
instead been invested in shares of one or more of the funds of the CALAMOS
INVESTMENT TRUST as designated by the trustee. Thus, the value of the account
increases with contributions to the account or with increases in the value of
the measuring shares, and the value of the account decreases with withdrawals
from the account or with declines in the value of the measuring shares. If a
participating trustee retires, the trustee may elect to receive payments under
the plan in a lump sum or in equal installments over a period of five years. If
a participating trustee dies, any amount payable under the Plan will be paid to
the trustee's beneficiaries. Deferred compensation investments of $17,654 are
included in "Other Assets" on the Statement of Assets and Liabilities at
December 31, 2003. The Portfolio's obligation to make payments under the Plan is
a general obligation of the Portfolio.

NOTE 3 - INVESTMENTS

Purchases and sales of investments other than short-term obligations for the
year ended December 31, 2003 were as follows:


                                                  
    Purchases                                        $ 14,847,839
    Proceeds from sales                                12,290,202


The following information is presented on an income tax basis as of December 31,
2003. Differences between amounts for financial statements and Federal income
tax purposes are due to timing differences. The cost basis of investments for
Federal income tax purposes at December 31, 2003 was as follows:


                                                  
   Cost basis of investments                         $ 22,621,358
   Gross unrealized appreciation                        3,303,005
   Gross unrealized depreciation                          285,457
   Net unrealized appreciation                          3,017,548



NOTE 4 - DISTRIBUTIONS TO SHAREHOLDERS



                          NOTES TO FINANCIAL STATEMENTS


The tax character of distributions during the years ended December 31 was as
follows:



                                                  2003               2002
Distributions paid from:                          ----               ----
                                                            
   Ordinary Income                              $ 611,634         $ 529,483
   Net Long - Term Capital Gain                         -                 -
                                                ---------         ---------
   Total Taxable Distribution                   $ 611,634         $ 529,483


As of December 31, 2003, the components of accumulated earnings/(losses) on a
tax basis were as follows:




                                                              
Undistributed ordinary income - net                              $    93,601
Accumulated capital losses                                        (1,462,403) *
Unrealized gain/(losses) - net                                     3,017,548 **
Other - net                                                          (14,179)
                                                                 -----------
Total accumulated earnings/(losses) - net                        $ 1,634,567



*     As of December 31, 2003, the Portfolio had net tax basis capital loss
      carryforwards of $411,325, which will expire, if not used, in 2010, and a
      capital loss carryforward of $951,889, which, if not used, will expire in
      2009.

      In addition, the Portfolio had a Post-October capital loss of $99,189
      which will be treated as having occurred on January 1, 2004.

**    The difference between book-basis and tax-basis unrealized gains/(losses)
      is attributable to the difference between book and tax amortization
      methods for premiums and discounts on fixed income securities and other
      temporary book/tax differences.

NOTE 5 - CAPITAL SHARE TRANSACTIONS

The following table summarizes the activity in capital shares of the Portfolio:



Year ended December 31, 2003:
                                                            SHARES                 DOLLARS
                                                       ---------------         ---------------
                                                                         
Shares sold                                                    353,754         $     4,112,433
Shares issued in reinvestment
  of distributions                                              52,010                 611,634
Less shares redeemed                                          (166,886)             (1,886,489)
                                                       ---------------         ---------------
     Share Increase                                            238,878         $     2,837,578
                                                       ===============         ===============
Year ended December 31, 2002:

                                                            SHARES                 DOLLARS
                                                       ---------------         ---------------
                                                                         
Shares sold                                                    385,637         $     4,191,882
Shares issued in reinvestment
  Of distributions                                              49,651                 529,483
Less shares redeemed                                          (257,137)             (2,749,638)
                                                       ---------------         ---------------
     Share Increase                                            178,151         $     1,971,727
                                                       ===============         ===============




                         NOTES TO FINANCIAL STATEMENTS

NOTE 6 - SECURITIES LENDING

During the period ended December 31, 2003, the Portfolio lent certain of its
securities to broker-dealers and banks. Any such loan must be continuously
secured by collateral in cash or cash equivalents maintained on a current basis
in an amount at least equal to the market value of the securities loaned by the
Portfolio. The Portfolio would continue to receive the equivalent of the
interest or dividends paid by the issuer on the securities loaned, and would
also receive an additional return that may be in the form of a fixed fee or a
percentage of the collateral. The Portfolio may pay reasonable fees to persons
unaffiliated with the Portfolio for services in arranging these loans. The
Portfolio would have the right to call the loan and obtain the securities loaned
at any time on notice of not more than five business days. The Portfolio would
not have the right to vote the securities during the existence of the loan but
generally would call the loan in an attempt to permit voting of the securities.
In the event of bankruptcy or other default of the borrower, the Portfolio could
experience both delays in liquidating the loan collateral or recovering the
loaned securities and losses, including (a) possible decline in the value of the
collateral or in the value of the securities loaned during the period while the
Portfolio seeks to enforce its rights thereto, (b) possible subnormal levels of
income and lack of access to income during this period, and (c) expenses of
enforcing its rights. In an effort to reduce these risks, the investment manager
will monitor the creditworthiness of the firms to which the Portfolio lends
securities. At December 31, 2003, the Portfolio had securities valued at
$3,167,268 that were on loan to broker-dealers and banks and the Portfolio had
$3,245,101 in cash collateral.





                       CALAMOS GROWTH AND INCOME PORTFOLIO

FINANCIAL HIGHLIGHTS
SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD WERE AS FOLLOWS:



                                                                                                                        MAY 19,
                                                                              YEAR ENDED DECEMBER 31,                  TO DEC 31,
                                                                2003           2002          2001          2000          1999
                                                           -------------------------------------------------------------------------
                                                                                                        
NET ASSET VALUE, BEGINNING OF PERIOD                          $ 10.46       $  11.29       $ 12.30        $ 12.18      $ 10.00
                                                           -------------------------------------------------------------------------

INCOME FROM INVESTMENT OPERATIONS:
Net investment income                                            0.34           0.43          0.38           0.31         0.09
Net realized and unrealized gain (loss) on investments           2.32          (0.89)        (0.99)          0.39         2.23
                                                           -------------------------------------------------------------------------
     Total from investment operations                            2.66          (0.46)        (0.61)          0.70         2.32
                                                           -------------------------------------------------------------------------

DISTRIBUTIONS:
Dividends from net investment income                            (0.38)         (0.37)        (0.40)         (0.30)       (0.09)
Dividends from net realized gains                                   -              -             -          (0.28)           -
Distributions paid from capital                                     -              -             -              -        (0.05)
                                                           -------------------------------------------------------------------------
     Total distributions                                        (0.38)         (0.37)        (0.40)         (0.58)       (0.14)
                                                           -------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD                                $ 12.74       $  10.46       $ 11.29        $ 12.30      $ 12.18
                                                           =========================================================================

Total Return (a)                                                25.76%         (4.10%)       (4.87%)         5.72%       23.19%

RATIOS AND SUPPLEMENTAL DATA:
Net assets, end of period (000)                               $22,368       $ 15,863       $15,104        $10,859      $ 2,542
Ratio of net expenses to average net assets                      1.47%          1.00%         1.00%          1.00%        1.00% *
Ratio of net investment income to average net assets             3.11%          3.98%         3.41%          3.01%        3.10% *
Ratio of gross expenses to average net assets prior to
  waiver of expenses by the advisor                              1.59%          1.78%         1.28%          3.44%        9.86% *


PORTFOLIO TURNOVER RATE                                         68.46%         42.88%        57.57%         70.51%       31.65% *



 *   Annualized
(a)  Total return is not annualized for periods that are less than a full year.





                         REPORT OF INDEPENDENT AUDITORS

The Board of Trustees and Shareholders
Calamos Advisors Trust -
   Calamos Growth and Income Portfolio


We have audited the accompanying statement of assets and liabilities of Calamos
Advisors Trust (comprising the Calamos Growth and Income Portfolio), including
the schedule of investments, as of December 31, 2003, and the related statement
of operations for the year then ended, the statement of changes in net assets
for each of the two years in the period then ended, and the financial highlights
for each of the periods indicated therein. These financial statements and
financial highlights are the responsibility of the Portfolio's management. Our
responsibility is to express an opinion on these financial statements and
financial highlights based on our audits.

We conducted our audit in accordance with auditing standards generally accepted
in the United States. Those standards require that we plan and perform the audit
to obtain reasonable assurance about whether the financial statements and
financial highlights are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements and financial highlights. Our procedures included
confirmation of investments owned as of December 31, 2003, by correspondence
with the custodian and brokers. An audit also includes assessing the accounting
principles used and significant estimates made by management, as well as
evaluating the overall financial statement presentation. We believe that our
audit provides a reasonable basis for our opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial position of
Calamos Advisors Trust at December 31, 2003, the results of its operations for
the year then ended, the changes in its net assets for each of the two years in
the period then ended, and the financial highlights for each of the periods
indicated therein, in conformity with accounting principles generally accepted
in the United States.


/s/ ERNST & YOUNG LLP

Chicago, Illinois
February 10, 2004








                               TRUSTEES & OFFICERS

The management of the Trust, including general supervision of duties performed
for the Fund under the Investment Management Agreement, is the responsibility of
its board of trustees.

The following table sets forth, as of December 31, 2003 each trustee's
position(s) with the Trust, age, principal occupation during the past five
years, number of portfolios overseen, other directorships, and the date on which
the trustee first became a trustee of the Trust.




                                                                NUMBER OF PORTFOLIOS IN
NAME AND AGE             POSITION(S) HELD WITH TRUST AND DATE        FUND COMPLEX        PRINCIPAL OCCUPATION(S) DURING PAST 5 YEARS
AT DECEMBER 31, 2003     FIRST ELECTED OR APPOINTED TO OFFICE     OVERSEEN BY TRUSTEE            AND OTHER DIRECTORSHIPS HELD
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                
TRUSTEES WHO ARE INTERESTED PERSONS OF TRUST:

John P. Calamos, Sr.     Trustee and President (since 1999)               11              President and CEO, Calamos Holdings Inc.
63*                                                                                       ("CHI") Calamos Asset Management. Inc.
                                                                                          ("CAM") and Calamos Financial Services,
                                                                                          Inc. ("CFS")

Nick P. Calamos,  42*    Trustee and Vice President (since 1999)          11              Senior Executive Vice President, CHI,
                                                                                          CAM and CFS

TRUSTEES WHO ARE NOT INTERESTED PERSONS OF TRUST:



Richard J. Dowen, 59**   Trustee (since 1999)                             11              Chair and Professor of Finance, Northern
                                                                                          Illinois University

Joe F. Hanauer,   66     Trustee (since 2001)                             11              Director of MAF Bancorp (banking),
                                                                                          Director, Homestore.com, Inc., (Internet
                                                                                          provider of real estate information and
                                                                                          products); Director, Combined
                                                                                          Investments, L.P. (investment
                                                                                          management)

John E. Neal,     53     Trustee (since 2001)                             11              Managing Director, Bank One Capital
                                                                                          Markets, Inc. (investment banking)
                                                                                          (since 2000); Executive Vice President
                                                                                          and Head of Real Estate Department, Bank
                                                                                          One (1998-2000); Director, The Brickman
                                                                                          Group, Ltd.

Weston W. Marsh,  53     Trustee (since 2002)                             11              Partner, Freeborn & Peters (law firm)

William R. Rybak, 52     Trustee (since 2002)                             11              Retired Private Investor; Executive Vice
                                                                                          President and CFO, Van Kampen
                                                                                          Investments, Inc. (investment manager)
                                                                                          prior thereto; Director, Howe Barnes
                                                                                          Investments; Director, Private Bancorp,
                                                                                          Inc.



* Messrs. John Calamos and Nick Calamos are trustees who are "interested person"
of the Trust as defined in the Investment Company Act of 1940 (the "1940 Act")
because of their position with Calamos.

** Effective January 1, 2004, Mr. Dowen resigned as a trustee of the Trust.






OFFICERS. Messrs. John Calamos and Nick Calamos are president and vice president
of the Trust, respectively. The preceding table gives more information about
Messrs. John Calamos and Nick Calamos. The following table sets forth as of
December 31, 2003 each other officer's name, position with the Trust, age,
principal occupation during the past five years, other directorships, and the
date on which he or she first became and officer of the Trust. Each officer
serves until his or her successor is chosen and qualified or until his or her
resignation or removal by the board of trustees.




NAME AND AGE AT               POSITION(S) HELD WITH TRUST AND DATE FIRST  PRINCIPAL OCCUPATION(S) DURING THE PAST 5 YEARS AND OTHER
DECEMBER 31, 2003             ELECTED OR APPOINTED TO OFFICE              DIRECTORSHIPS HELD
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                    
Rhowena Blank, 35             Treasurer (since 1999)                      Vice President-Operations, CAM (since
                                                                          1999); Vice President, CFS (since 2000);
                                                                          and Director of Operations, Christian
                                                                          Brothers Investment Services (1998-1999)

Patrick H. Dudasik, 48        Vice President (since 2001)                 Executive Vice President, Chief
                                                                          Financial Officer and Administrative
                                                                          Officer, and Treasurer of CHI, CAM and
                                                                          CFS (since 2001); and Chief Financial
                                                                          Officer, David Gomez and Associates,
                                                                          Inc. (1998-2001) (executive search firm)

James S. Hamman, Jr.,  34     Secretary (since 1999)                      Executive Vice President and General
                                                                          Counsel, CHI, CAM and CFS (since 1998)

Jeff Lotito, 31               Assistant Treasurer (since 2000)            Operations Manager, CAM (since 2000);
                                                                          Manager-Fund Administration, Van Kampen
                                                                          (1999-2000); Supervisor-Corporate
                                                                          Accounting, Stein Roe and Farnham
                                                                          (1998-1999) (investment management)

Ian J. McPheron, 32           Assistant Secretary (since 2003)            Associate Counsel and Director of
                                                                          Compliance of CAM and CFS (since 2002);
                                                                          Associate, Gardner, Carton & Douglas
                                                                          (law firm) (2002); Vice President,
                                                                          Associate General Counsel and Assistant
                                                                          Secretary, Van Kampen Investments, Inc.
                                                                          (2000-2002); Associate, Wildman,
                                                                          Harrold, Allen & Dixon (law firm)
                                                                          (1997-2000)


The Statement of Additional Information ("SAI") includes additional information
about fund directors and is available upon request without charge by calling our
toll free number (800) 582-6959.

                             IMPORTANT TAX AND OTHER
                            SUPPLEMENTARY INFORMATION
                                   (Unaudited)

QUALIFIED DIVIDEND INCOME FOR INDIVIDUALS
For the year ended December 31, 2003, $44,175 is designated by the Portfolio as
qualified dividend income.

DIVIDEND RECEIVED DEDUCTION
For the year ended December 31, 2003, 6.80% of the dividends paid from net
investment income, including short-term gains, qualifies for the dividends
received deduction available to corporate shareholders of the Portfolio.

PROXY VOTING POLICIES
A description of the CALAMOS Proxy Voting Policies and Procedures is available
by calling (800) 582-6959 by visiting its website at www.calamos.com or by
writing CALAMOS at: CALAMOS INVESTMENTS, Attn: Client Services, 1111 East
Warrenville Road, Naperville, IL 60563, and on the Securities and Exchange
Commission's website at www.sec.gov.

ITEM 2.  CODE OF ETHICS.

(a) The registrant has adopted a code of ethics (the "Code of Ethics") that
    applies to its principal executive officer, principal financial officer,
    principal accounting officer or controller, or person performing similar
    functions.

(b) Not applicable.

(c) The registrant has not amended its Code of Ethics during the period covered
    by the shareholder report presented in Item 1 hereto.

(d) The registrant has not granted a waiver or an implicit waiver from its Code
    of Ethics during the period covered by the shareholder report presented in
    Item 1 hereto.

(e) Not applicable.

(f) (a) The registrant's Code of Ethics is attached as an Exhibit hereto.

ITEM 3.  AUDIT COMMITTEE FINANCIAL EXPERT.

The registrant's Board of Trustees has determined that, for the period covered
by the shareholder report presented in Item 1 hereto, it had three audit
committee financial experts serving on its audit committee, each of whom is an
independent Trustee for purpose of this N-CSR item: Richard J. Dowen, John E.
Neal and William Rybak. Under applicable securities laws, a person who is
determined to be an audit committee financial expert will not be deemed an
"expert" for any purpose, including without limitation for the purposes of
Section 11 of the Securities Act of 1933, as a result of being designated or
identified as an audit committee financial expert. The designation or
identification of a person as an audit committee financial expert does not
impose on such person any duties, obligation, or liabilities that are greater
than the duties, obligations and liabilities imposed on such person as a member
of audit committee and Board of Trustees in the absence of such designation or
identification.

ITEM 4.  PRINCIPAL ACCOUNTANT FEES AND SERVICES.

(a) Audit Fee - $20,000 and $34,000 are the aggregate fees billed in each of the
    last two fiscal years for professional services rendered by the principal
    accountant to the registrant for the audit of the registrant; annual
    financial statements or services that are normally provided by the
    accountant in connection with statutory and regulatory filings or
    engagements for those fiscal years.

(b) Audit-Related Fees - There were no fees billed in each of the last two
    fiscal years for assurance and related services rendered by the principal
    accountant to the registrant that are reasonably related to the performance
    of the audit of the registrant's financial statements and are not reported
    under paragraph (a) of this Item 4.

(c) Tax Fees - $1,361 and $21,256 are the aggregate fees billed in each of the
    last two fiscal years for professional services rendered by the principal
    accountant to the registrant for tax compliance, tax advice, tax planning
    and tax return preparation.

    There were no fees billed in each of the last two fiscal years for
    professional services rendered by the principal accountant to the investment
    adviser for tax compliance, tax advice and tax planning that were required
    to be pre-approved by the audit committee as described in paragraph (e)(1)
    of this Item 4.

(d) All Other Fees - There were no fees billed in each of the last two fiscal
    years for products and services provided by the principal accountant to the
    registrant, other than the services reported in paragraph (a)-(c) of this
    Item 4.

    There were no fees billed in each of the last two fiscal years for products
    and services provided by the principal accountant to the investment adviser,
    other than the services reported in paragraphs (a)-(c) of this Item 4, that
    were required to be pre-approved by the audit committee as described in
    paragraph (e)(1) of this Item 4.

(e) (1) Registrant's audit committee meets with the principal accountants and
    management to review and pre-approve all audit services to be provided by
    the principal accountants.

    The audit committee shall pre-approve all non-audit services to be provided
    by the principal accountants to the registrant, including the fees and other
    compensation to be paid to the principal accountants; provided that the
    pre-approval of non-audit services is waived if (i) the services were not
    recognized by management at the time of the engagement as non-audit
    services, (ii) the aggregate fees for all non-audit services provided to the
    registrant is less than 5% of the total fees paid by the registrant to its
    principal accountants during the fiscal year in which the non-audit services
    are provided, and (iii) such services are promptly brought to the attention
    of the audit committee by management and the audit committee approves
    them prior to the completion of the audit.

    The audit committee shall pre-approve all non-audit services to be provided
    by the principal accountants to the investment adviser or any entity
    controlling, controlled by or under common control with the adviser that
    provides ongoing services to the registrant if the engagement relates
    directly to the operations or financial reporting of the registrant,
    including the fees and other compensation to be paid to the principal
    accountants; provided that pre-approval of non-audit services to the adviser
    or an affiliate of the adviser is not required if (i) the services were not
    recognized by management at the time of the engagement as non-audit
    services, (ii) the aggregate fees for all non-audit services provided to the
    adviser and all entities controlling, controlled by or under common control
    with the adviser are less than 5% of the total fees for non-audit services
    requiring pre-approval under paragraph (e)(1) of this Item 4 paid by the
    registrant, the adviser or its affiliates to the registrant's principal
    accountants during the fiscal year in which the non-audit services are
    provided, and (iii) such services are promptly brought to the attention of
    the audit committee by management and the audit committee approves them
    prior to the completion of the audit.

    (2) 100% of the services provided to the registrant described in paragraphs
    (b)-(d) of this Item 4 were pre-approved by the audit committee pursuant to
    paragraphs (e)(1) of this Item 4. There were no services provided to the
    investment adviser or any entity controlling, controlled by or under common
    control with the adviser described in paragraphs (b)-(d) of this Item 4 that
    were required pre-approved by the audit committee.

(f) No disclosures are required by this Item 4(f).

(g) $1,361 and $21,256 are the aggregate non-audit fees billed in each of the
    last two fiscal years for services rendered by the principal accountant to
    the registrant. $90,200 and $9,200 are the aggregate non-audit fees billed
    in each of the last two fiscal years for services rendered by the principal
    accountant to the investment adviser or any entity controlling, controlled
    by or under common control with the adviser. All of the aggregate fees
    billed by the principal accountant for non-audit services to the
    registrant's investment adviser relate to services that began prior to the
    adoption of rules requiring audit committee pre-approval. However, the
    registrant's audit committee did approve such non-audit services.

(h) No disclosures are required by this Item 4(h).

ITEM 5.  AUDIT COMMITTEE OF LISTED REGISTRANTS.

Not applicable

ITEM 6.  [RESERVED.]

ITEM 7.  DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END
MANAGEMENT INVESTMENT COMPANIES.

Not applicable.

ITEM 8.  PURCHASES OF EQUITY SECURITIES BY CLOSED-END FUNDS.

Not applicable

ITEM 9.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS, not applicable to
Annual Reports for the period ended December 31, 2003.

ITEM 10. CONTROLS AND PROCEDURES.

a)  The registrant's principal executive officer and principal financial
    officer have evaluated the registrant's disclosure controls and procedures
    within 90 days of this filing and have concluded that the registrant's
    disclosure controls and procedures were effective, as of that date, in
    ensuring that information required to be disclosed by the registrant in this
    Form N-CSR was recorded, processed, summarized, and reported timely.

b)  There were no changes in the registrant's internal controls over financial
    reporting (as defined in Rule 30a-3(d) under the Investment Company Act of
    1940) that occurred during the registrant's last fiscal half-year (the
    registrant's second fiscal half-year in the case of an annual report) that
    has materially affected, or is reasonably likely to materially affect, the
    registrant's internal control over financial reporting.

ITEM 11. EXHIBITS.

(a)(1)  Code of Ethics

(a)(2)(i)  Certification of Principal Executive Officer.

(a)(2)(ii)  Certification of Principal Financial Officer.




                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934 and
the Investment Company Act of 1940, the registrant has duly caused this report
to be signed on its behalf by the undersigned, thereunto duly authorized.

Calamos Advisors Trust

By:    /s/ John P. Calamos, Sr.
   -----------------------------------------------------------------------------
Name:  John P. Calamos, Sr.
Title:   Principal Executive Officer
Date:  February 23, 2004

By:    /s/ Patrick H. Dudasik
   -----------------------------------------------------------------------------
Name:  Patrick H. Dudasik
Title:   Principal Financial Officer
Date:  February 23, 2004


         Pursuant to the requirements of the Securities Exchange Act of 1934 and
the Investment Company Act of 1940, this report has been signed by the following
persons on behalf of the registrant and in the capacities and on the dates
indicated.

Calamos Advisors Trust

By:   /s/ John P. Calamos, Sr.
   -----------------------------------------------------------------------------
Name:  John P. Calamos, Sr.
Title:   Principal Executive Officer
Date:  February 23, 2004

By:   /s/ Patrick H. Dudasik
   -----------------------------------------------------------------------------
Name:  Patrick H. Dudasik
Title:   Principal Financial Officer
Date:  February 23, 2004