X0202 4 2006-05-11 0 0000791348 LONE STAR TECHNOLOGIES INC LSS 0001218738 BEST RHYS J 15660 N. DALLAS PARKWAY SUITE 500 DALLAS TX 75248 1 1 0 0 Chairman and CEO Common Stock 2006-05-11 4 F 0 4557 57.08 D 175113 D Payment of tax liability by withholding shares incident to the vesting of restricted stock issued in accordance with Rule 16b-3. Total shares include 4,053 shares purchased pursuant to Issuer's Employee Stock Purchase Plan and 108,000 shares of restricted stock granted under Issuer's 1985 and 2004 Long-Term Incentive Plans. Rhys J. Best 2006-05-15