X0202 4 2005-07-21 0 0000791348 LONE STAR TECHNOLOGIES INC LSS 0001218739 DUNN W BYRON 15660 N. DALLAS PARKWAY, SUITE 500 DALLAS TX 75248 0 1 0 0 CEO of Operating Co. Common Stock 2005-07-21 4 M 0 25000 34.06 A 45680 D Common Stock 2005-07-21 4 M 0 35000 39.27 A 80680 D Common Stock 2005-07-22 4 M 0 15000 34.06 A 95680 D Common Stock 2005-07-21 4 S 0 60000 49.23 D 35680 D Common Stock 2005-07-22 4 S 0 15000 50.22 D 20680 D Option (right to buy) 34.06 2005-07-21 4 M 0 25000 D 2010-02-15 Common Stock 50000 25000 D Option (right to buy) 39.27 2005-07-21 4 M 0 35000 D 2011-02-20 Common Stock 35000 0 D Option (right to buy) 34.06 2005-07-22 4 M 0 15000 D 2010-02-15 Common Stock 25000 10000 D Exercise of in-the-money employee stock options. Total shares include 17,417 shares of restricted stock granted under Issuer's 2004 and 1985 Long-Term Incentive Plans. Cumulative installments of 12,500 shares each on and after February 15, 2001, 2002, 2003 and 2004. Cumulative installments of 8,750 shares each on and after February 20, 2002, 2003, 2004 and 2005. Stock options granted under Issuer's 1985 Long-Term Incentive Plan. W. Byron Dunn 2005-07-25