Adams Express Co.

Kathleen T. McGahran, director, bought 239 shares at $12.49 each on July 15 and now holds 1,370.

AES Corp.

Paul T. Hanrahan, chief executive, sold 116,000 shares between $10.25 and $10.28 each on July 14 and now holds 182,001.

Circuit City Stores Inc.

Dennis John Bowman, officer and director, sold 30,000 shares at $13.70 each on July 19 and now holds 72,302.

Brian Edward Levy, officer, sold 75,000 shares at $13.30 each on July 19 and now holds 45,000.

CompuDyne Corp.

Martin A. Roenigk, chief executive, sold 5,000 shares between $9.41 and $9.42 each on July 14 and now holds 1,393,920.

Coventry Health Care Inc.

Bernard J. Mansheim, officer, sold 3,769 shares at $47.72 each on July 12 and now holds 96,500.

EntreMed Inc.

James S. Burns, chief executive, bought 25,000 shares between $1.92 and $2 each on July 14 and now holds 25,000.

Medifast Inc.

Bradley T. MacDonald, chief executive, bought 10,000 shares at $3.49 each on July 16 and now holds 647,748.

Petroleum & Resources Corp.

Kathleen T. McGahran, director, bought 123 shares at $24.30 each on July 15 and now holds 914.

Portfolio Recovery Associates Inc.

Craig A. Grube, officer, sold 1,375 shares at $26.85 each on July 15 and now holds 141,604.

James L. Keown, former, sold 3,000 shares at $26.30 each on July 16 and now holds 282,950.

Smithfield Foods Inc.

Wendell H. Murphy Jr., director and owner, sold 2,054 shares between $28.98 and $29.45 each from July 6 to July 13 and now holds 1,465,370.

Trex Co.

Anthony J. Cavanna, director and owner, sold 14,064 shares between $36.27 and $38.01 each from July 9 to July 15 and now holds 1,647,690.

Andrew U. Ferrari, director, sold 7,000 shares between $37.28 and $37.99 each from July 15 to July 16 and now holds 971,177.

Robert G. Matheny, chief executive, sold 2,120 shares between $37 and $37.79 each from July 15 to July 19 and bought 120 shares at $37.75 each on July 13 and now holds 1,333,420.

United Therapeutics Corp.

Fred T. Hadeed, chief financial officer, sold 1,944 shares at $24.30 each on July 15 and now holds 1,000.

Paul A. Mahon, general counsel, sold 2,000 shares at $24.30 each on July 15 and now holds 12,000.

Martine A. Rothblatt, chief executive, sold 2,000 shares at $24.71 each on July 15 and now holds 896,368.

-- Thomson Financial