X0202 4/A 2005-04-29 2005-05-03 0 0000057497 LAMSON & SESSIONS CO LMS 0001193396 SKILLING DAVID VAN THE LAMSON & SESSIONS CO. 25701 SCIENCE PARK DRIVE CLEVELAND OH 44122 1 0 0 0 COMMON STOCK 2005-04-29 4 A 0 231 9.725 A 1730 D COMMON STOCK 5687 I See Footnote COMMON STOCK 2005-04-29 4 M 0 1000 6.625 A 78628 D Stock Option (Right to Buy Common Stock) 9.395 2005-05-02 4 A 0 4000 0.00 A 2006-05-02 2015-05-02 Common Stock 4000 4000 D Stock Option (Right to Buy Common Stock) 6.625 1995-05-01 4 M 0 1000 0.00 D 1996-05-01 2005-05-01 Common Stock 1000 0 D Restricted shares, exempt under Rule 16b-3(1), held by issuer until 3-year vesting period. New account as of May 2004 - Shares held in Trust pursuant to Directors Deferred Compensation Plan - a 16b-3 Plan. Transaction(s) completed by Trustee as of April 8, 2005. Direct Ownership: Total of 78,628 shares includes 69,328 shares previously held in Deferred Compensation Trust Account. Grant pursuant to the Company's 1998 Incentive Equity Plan (As Amended and Restated as of April 30, 2004), a Rule 16b-3 plan, to the reporting person of an option to purchase 4,000 shares of the Company's Common Stock, 100% exercisable on and after May 2, 2006. Stock Option, pursuant to the Company's Non-Employee Director Stock Option Plan, a Rule 16b-3 plan, to the reporting person of an option to purchase 1,000 shares of the Company's Common Stock, one-hundred percent exercisable on and after May 1, 1996. /s/ Aileen Liebertz Aileen Liebertz, Attorney-in-Fact for D. Van Skilling 2005-05-04