Anteon International Corp.

Thomas M. Cogburn, officer and director, sold 2,000 shares at $23.95 each on Feb. 3 and now holds 490,089.

Cardinal Financial Corp.

John Wilson Fisher, director, bought 2,000 shares between $4.55 and $4.65 each from Jan. 31 to Feb. 3 and now holds 22,000.

Applera Corp. Celera Genomics Group

Michael W. Hunkapiller, president, sold 940 shares between $9.21 and $9.48 each on Feb. 3 and now holds 137,656.

First Virginia Banks Inc.

Edward M. Holland, director, sold 750 shares between $41.10 and $41.16 each on Jan. 30 and now holds 81,199.

Lawrence T. Jennings, director, sold 3,000 shares at $37.60 each on Dec. 2, 2002 and now holds 450.

NVR Inc.

Craig Scott Bartlett, director, sold 6,625 shares between $322.02 and $330.07 each from Jan. 28 to Jan. 30 and now holds 2,410.

PEC Solutions Inc.

Alan H. Harbitter, chief technology officer, sold 5,000 shares at $30.33 each on Feb. 3 and now holds 2,983,750.

SLM Corp.

Wolfgang Schoellkopf, director, sold 5,579 shares between $106.60 and $107 each on Jan. 30 and now holds 60,000.

Spherix Inc.

Gilbert V. Levin, chief executive, sold 5,000 shares at $8.09 each on Dec. 10, 2002 and now holds 2,845,820.

M. Karen Levin, officer, director and beneficial owner, sold 5,000 shares at $8.09 each on Dec. 10, 2002 and now holds 2,845,820.

Trex Co.

Anthony J. Cavanna, chief financial officer, sold 2,632 shares between $35.59 and $35.92 each on Jan. 29 and now holds 2,003,060.

Andrew U. Ferrari, officer, director and beneficial owner, sold 7,500 shares between $31.15 and $36 each from Jan. 30 to Feb. 4 and now holds 1,644,840.

Robert G. Matheny, president, sold 12,750 shares between $31.15 and $35.99 each from Jan. 30 to Feb. 4 and now holds 1,671,150.

Roger A. Wittenberg, officer, director and beneficial owner, sold 3,750 shares between $35.01 and $35.90 each on Jan. 30 and now holds 1,849,350.

Vastera Inc.

Arjun Rishi, chairman, sold 10,000 shares at $5.60 each on Jan. 31 and now holds 556,608.

Veridian Corp.

Ronald C. Jones, officer, sold 3,400 shares at $21.51 each on Feb. 3 and now holds 595.

WebMethods Inc.

Mary Dridi, chief financial officer, sold 14,428 shares between $11.07 and $11.21 each on Feb. 3 and now holds 21,518.

Jack L. Lewis, officer and director, sold 10,000 shares at $11.14 each on Jan. 28 and now holds 278,082.

-- Thomson Financial