CAMPBELL ALTERNATIVE ASSET TRUST
                            MONTHLY REPORT - MAY 2009
                                   -----------

                     STATEMENT OF CHANGES IN NET ASSET VALUE
                     ---------------------------------------

Net Asset Value (21,997.511 units) at April 30, 2009            $    34,045,606
Additions of 66.479 units on May 31, 2009                               102,298
Redemptions of (965.645) units on May 31, 2009                       (1,485,935)
Offering Costs                                                          (25,467)
Net Income - May 2009                                                  (170,469)
                                                                ---------------

Net Asset Value (21,098.345 units) at May 31, 2009              $    32,466,033
                                                                ===============

Net Asset Value per Unit at May 31, 2009                        $      1,538.80
                                                                ===============

                           STATEMENT OF INCOME (LOSS)
                           --------------------------

Income:
  Gains (losses) on futures contracts:
    Realized                                                    $      (479,390)
    Change in unrealized                                                547,675

  Gains (losses) on forward and options on forward contracts:
    Realized                                                             51,952
    Change in unrealized                                               (199,388)
  Interest income                                                         1,860
                                                                ---------------
                                                                        (77,291)
                                                                ---------------



Expenses:
  Brokerage fee                                                          86,871
  Performance fee                                                             0
  Operating expenses                                                      6,307
                                                                ---------------
                                                                         93,178
                                                                ---------------

Net Income (Loss) - May 2009                                    $      (170,469)
                                                                ===============

                                 FUND STATISTICS
                                 ---------------

Net Asset Value per Unit on May 31, 2009                        $     1,538.80

Net Asset Value per Unit on April 30, 2009                      $     1,547.70

Unit Value Monthly Gain (Loss) %                                         (0.58)%

Fund 2009 calendar YTD Gain (Loss) %                                     (5.71)%

To the best of my knowledge and belief, the information contained herein is
accurate and complete.



                                  /s/ Theresa D. Becks
                                  -----------------------------------------
                                  Theresa D. Becks, Chief Executive Officer
                                  Campbell & Company, Inc.
                                  Managing Owner
                                  Campbell Alternative Asset Trust

                                  Prepared without audit

Dear Investor,

Gains in Stocks & Bonds Offset Losses in Currencies...

Conflicting signals on global recovery weighed on the direction of the markets
as increased risk appetite and signs of stabilization in the global economy
emerged. Equity markets continued their rally, particularly in Asia, generating
gains for stock index trading.



Fixed Income trading generated a marginal positive return as short-term rates in
Europe climbed higher following the European Central Bank rate cut of 25 basis
points. The yield curve continued to steepen and the market awaits the central
bank's reaction.

Gains in stock and bond trading were offset by losses in the foreign exchange
sector. The U.S. Dollar suffered a broad based decline in May on a combination
of stronger risk appetite and growing fears over structural deficiencies in the
U.S. Investors moved dormant dollar denominated assets overseas to capture
growth and risk in commodity block currencies. Smaller losses were also recorded
in commodities as natural gas finished a volatile month higher.

Diversification does not just lie within our markets traded; it includes
diversification of information, style and time horizon. At a time when markets
move from rational to irrational and back again, the science that drives our
process provides the discipline needed to navigate through these changing market
conditions.

Please do not hesitate to call with questions.

Sincerely,

Terri Becks
President & CEO
Campbell & Company, Inc.
Managing Owner
Campbell Alternative Asset Trust