Anteon International Corp.

Carlton B. Crenshaw, officer, sold 35,000 shares at $20.11 each on March 7 and now holds 325,611.

Columbia Bancorp

James R. Moxley Jr., director, bought 4,560 shares between $24.40 and $24.54 each from March 4 to March 6 and now holds 57,300.

Cornerstone Realty Income Trust Inc.

Harry S. Taubenfeld, director, bought 2,000 shares at $7.20 each on Feb. 20 and now holds 21,156.

Coventry Health Care Inc.

Bernard J. Mansheim, officer, sold 12,500 shares at $29 each on March 6 and March 7 and now holds 44,491.

Hanger Orthopedic Group Inc.

Mitchell J. Blutt, director, sold 105,500 shares between $10.50 and $10.66 each on March 5 and March 6 and now holds 87,827.

Eric A. Green, director, sold 105,500 shares between $10.50 and $10.66 each on March 5 and March 6 and now holds 87,827.

Isomet Corp.

Henry Zenzie, president, bought 18,611 shares between $0.75 and $1.87 each from Feb. 28 to March 6 and now holds 527,389.

Henry Hazard Zenzie, officer, bought 1,710 shares at $1.87 each on March 4 and now holds 6,212.

Landamerica Financial Group Inc.

Theodore L. Chandler Jr., chief operating officer, sold 7,500 shares at $37.55 each on March 10 and now holds 37,260.

Markel Corp. New

Steven Andrew Markel, officer and director, sold 14,600 shares between $216 and $217 each from March 5 to March 7 and now holds 366,429.

Mid Atlantic Medical Services Inc.

Debbie Hulen, officer, sold 12,000 shares at $35.53 each on March 5 and now holds 26,800.

Edward J. Muhl, director, sold 3,000 shares between $35.19 and $35.33 each on March 4 and now holds 23,000.

Noland Co.

Benjamin A.. Williams, officer, bought 600 shares between $36.57 and $37 each from March 7 to March 10 and now holds 800.

On Site Sourcing Inc.

Clifford M. Kendall, director, bought 200 shares at $1.46 each on March 7 and now holds 130,505.

Online Resources Corp.

Matthew P. Lawlor, chief executive, bought 2,000 shares at $2.83 each on March 5 and now holds 1,443,890.

RGC Resources Inc.

Orazio John S. D, officer, bought one shares at $19.35 each on March 3 and now holds 1,791.

Howard T. Lyon, officer and treasurer, bought two shares at $19.35 each on March 3 and now holds 1,293.

Dale P. Moore, officer, bought one shares at $19.35 each on March 3 and now holds 250.

John B. Williamson III, chief executive, bought 25 shares at $19.35 each on March 3 and now holds 7,038.

Southern Financial Bancorp Inc.

John Charles Belotti, director, bought 329 shares at $32 each on Feb. 20 and bought 4,750 shares at $30 each on Feb. 5 and now holds 36,748.

Richard E. Smith, director, bought 5,253 shares at $30 each on Feb. 5 and bought 252 shares at $32 each on Feb. 20 and bought 5,253 shares at $30 each on Feb. 5 and bought 252 shares at $32 each on Feb. 20 and now holds 40,526.

Talk America Holdings Inc.

Mark S. Fowler, director, sold 3,333 shares at $6.52 each on March 5 and now holds 75,341.

Trex Co.

Anthony J. Cavanna, chief financial officer, sold 2,632 shares between $29.96 and $30.36 each on March 6 and now holds 1,989,900.

Roger A. Wittenberg, officer, director and beneficial owner, sold 2,500 shares between $29.24 and $30.08 each on March 10 and now holds 1,811,650.

Veridian Corp.

Joseph P. Allen, chairman, bought 500 shares at $18.03 each on March 10 and now holds 383,945.

Williams Industries Inc.

Frank E. Williams Jr., officer and director, bought 5,000 shares between $3.07 and $3.15 each on March 11 and March 12 and bought 6,295 shares between $3.28 and $3.35 each on Feb. 27 and Feb. 28 and now holds 1,567,430.

-- Thomson Financial