X0303 4 2011-05-31 1 0001114485 CAMPBELL ALTERNATIVE ASSET TRUST NONE 0001024890 CAMPBELL & CO INC/MD 2850 QUARRY LAKE DRIVE BALTIMORE, MD 21209 0 0 1 1 Managing Owner Units of Beneficial Ownership 2011-05-31 4 S 0 741.284 1737.26 D 0 D Theresa D. Becks, Chief Executive Officer, Campbell & Company Inc., Managing Owner 2011-06-17