X0306 4 2017-05-23 0 0000703604 LAWSON PRODUCTS INC/NEW/DE/ LAWS 0001406297 King John Bryan 301 COMMERCE STREET SUITE 1600 FORT WORTH TX 76102 1 0 1 0 Common Stock 2017-05-23 4 P 0 353 18.8321 A 1958557 I See footnotes Common Stock 2017-05-23 4 P 0 400 18.8 A 1958957 I See footnotes Common Stock 2017-05-24 4 P 0 104 19.85 A 1959061 I See foonotes Common Stock 2017-05-24 4 P 0 200 19.5 A 1959261 I See footnotes Common Stock 3788 D Includes (i) 1,689,358 shares held by LKCM Private Discipline Master Fund, SPC (PDP), (ii) 26,102 shares held by LKCM Micro-Cap Partnership, L.P. (Micro), (iii) 10,128 shares held by LKCM Core Discipline, L.P. (Core), and (iv) 233,673 shares held by LKCM Headwater Investments II, L.P. (HW). LKCM Private Discipline Management, L.P. holds the management shares of PDP, and LKCM Alternative Management, LLC (PDP GP) is its general partner. LKCM Micro-Cap Management, L.P. (Micro GP) is the general partner of Micro. LKCM Core Discipline Management, L.P. (Core GP) is the general partner of Core. LKCM Headwater Investments II GP, L.P. (HW GP) is the general partner of HW. Mr. King is a controlling member of PDP GP, Micro GP, Core GP and HW GP. Mr. King expressly disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein. J. Bryan King 2017-05-24