American Capital Strategies Ltd.

Malon Wilkus, chief executive, bought 2,555 shares between $30.60 and $30.80 each on Aug. 13 and now holds 1,073,060.

Amerigroup Corp.

Nancy L. Grden, officer, sold 5,000 shares between $47 and $48 each on Aug. 16 and now holds 11,375.

AvalonBay Communities Inc.

John Joseph Healy Jr., director, sold 21,800 shares between $58.91 and $59.27 each from Aug. 12 to Aug. 13 and now holds 16,326.

Leo S. Horey III, officer, sold 26,400 shares at $59.50 each on Aug. 12 and now holds 175,516.

Edward M. Schulman, general counsel, sold 12,700 shares between $59.10 and $59.46 each on Aug. 12 and now holds 6,162.

Circuit City Stores Inc.

Brian Edward Levy, officer, sold 75,000 shares at $12.95 each on Aug. 17 and now holds 45,000.

CompuDyne Corp.

Martin A. Roenigk, chief executive, sold 5,000 shares at $8.57 each on Aug. 11 and now holds 1,374,010.

Cadmus Communications Corp.

Thomas E. Costello, director, bought 2,000 shares between $14.73 and $14.75 each on Aug. 16 and now holds 2,000.

Duratek Inc.

TCG Holdings LLC, beneficial owner of more than 10 percent, sold 595,639 shares between $15.05 and $15.35 each from Aug. 10 to Aug. 11 and now holds 2,483,370.

General Dynamics Corp.

John W. Schwartz, officer, sold 3,000 shares between $94.68 and $94.72 each on Aug. 16 and now holds 35,747.

Gene Logic Inc.

Robert R. Proulx, officer, bought 3,000 shares between $3.39 and $3.40 each on Aug. 12 and now holds 4,064.

Lafarge North America Inc.

Dominique Calabrese, officer, sold 10,000 shares at $43.40 each on Aug. 16 and now holds 57,603.

Bertrand P. Collomb, chairman, sold 15,000 shares at $43.50 each on Aug. 16 and now holds 5,408.

James J. Nealis III, officer, sold 10,000 shares at $43.35 each on Aug. 16 and now holds 0.

LandAmerica Financial Group Inc.

John Richard Blanchard, officer, sold 788 shares at $41.02 each on Aug. 10 and now holds 2,929.

Municipal Mortgage & Equity LLC

Michael L. Falcone, chief operating officer, sold 4,200 shares between $23.75 and $24.05 each on Aug. 10 and now holds 102,353.

Norfolk Southern Corp.

James A. Hixon, officer, sold 10,000 shares at $26.69 each on Aug. 10 and now holds 57,832.

Henry C. Wolf, chief financial officer, sold 10,000 shares between $27.10 and $27.13 each on Aug. 11 and now holds 166,077.

Novavax Inc.

Michael A. McManus Jr., director, bought 10,000 shares at $3.41 each on Aug. 16 and now holds 40,000.

NVR Inc.

Dennis M. Seremet, officer, sold 1,000 shares between $503 and $504.58 each on Aug. 17 and now holds 46,374.

John M. Toups, director, sold 4,500 shares between $477.10 and $480 each from Aug. 10 to Aug. 11 and now holds 8,125.

Orbital Sciences Corp.

Edward F. Crawley, director, bought 500 shares at $10 each on Aug. 16 and now holds 2,466.

Portfolio Recovery Associates Inc.

Craig A. Grube, officer, sold 1,375 shares at $27.11 each on Aug. 13 and now holds 138,854.

James L. Keown, former, sold 3,000 shares at $27.26 each on Aug. 16 and now holds 279,950.

Primus Telecommunications Group Inc.

John F. DePodesta, officer and director, bought 20,000 shares at $1.56 each on Aug. 12 and now holds 121,496.

Neil L. Hazard, chief operating officer, bought 100,000 shares between $1.50 and $1.60 each from Aug. 11 to Aug. 13 and now holds 122,611.

SafeNet Inc.

Thomas A. Brooks, director, sold 19,950 shares between $26.20 and $26.31 each on Aug. 16 and now holds 300.

Spherix Inc.

Thomas W. Gantt, chief executive, bought 10,000 shares between $3.40 and $3.91 each from Aug. 11 to Aug. 12 and now holds 10,000.

Star Scientific Inc.

Leo S. Tonkin, director, sold 20,000 shares between $5 and $5.01 each on Aug. 17 and now holds 150,000.

Sensytech Inc.

John Irvin, director, bought 5,000 shares at $22.58 each on Aug. 13 and now holds 34,121.

Sitel Corp.

Kelvin C. Berens, director, bought 10,000 shares at $1.94 each on Aug. 10 and now holds 89,146.

Kelvin C. Berens Trust, trustee, bought 10,000 shares at $1.94 each on Aug. 10 and now holds 89,046.

Tessco Technologies Inc.

Daniel Okrent, director, bought 5,000 shares at $11.66 each on Aug. 17 and now holds 6,000.

Tredegar Corp.

Norman Allan Scher, chief executive, sold 13,100 shares at $16.25 each from Aug. 11 to Aug. 16 and now holds 240,733.

Larry J. Scott, officer, sold 5,250 shares at $16.25 each on Aug. 11 and now holds 32,727.

Trex Co.

Anthony J. Cavanna, director, sold 4,487 shares between $42.10 and $42.60 each on Aug. 16 and now holds 1,559,040.

Andrew U. Ferrari, director, sold 9,300 shares between $41.47 and $42.28 each from Aug. 12 to Aug. 13 and now holds 932,427.

Robert G. Matheny, chief executive, sold 3,000 shares between $42.25 and $42.62 each on Aug. 16 and now holds 1,309,300.

-- Thomson Financial