Distribution Solutions Group, Inc. — Director's Dealing 2017

May 26, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: LAWSON PRODUCTS INC/NEW/DE/ (LAWS)
CIK: 0000703604
Period of Report: 2017-05-25

Reporting Person: KING LUTHER CAPITAL MANAGEMENT CORP (10% Owner)
Reporting Person: LKCM Private Discipline Master Fund, SPC (10% Owner)
Reporting Person: LKCM Investment Partnership, L.P. (10% Owner)
Reporting Person: LKCM Micro-Cap Partnership, L.P. (10% Owner)
Reporting Person: LKCM Core Discipline, L.P. (10% Owner)
Reporting Person: LKCM Headwater Investments II, L.P. (10% Owner)
Reporting Person: King Luther Jr (10% Owner)
Reporting Person: King John Bryan (Director, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-05-25	Common Stock	P	1400	$19.85	Acquired	2216949	Indirect
2017-05-25	Common Stock	P	100	$19.85	Acquired	2217049	Indirect
2017-05-25	Common Stock	P	697	$19.8715	Acquired	2217746	Indirect
2017-05-25	Common Stock	P	2110	$19.8571	Acquired	2219856	Indirect
2017-05-26	Common Stock	P	3765	$19.8878	Acquired	2223621	Indirect
2017-05-26	Common Stock	P	3076	$19.8813	Acquired	2226697	Indirect
2017-05-26	Common Stock	P	2505	$19.8561	Acquired	2229202	Indirect

Footnotes

F1: This Form 4 is filed by Luther King Capital Management Corporation (LKCM), LKCM Private Discipline Master Fund, SPC (PDP), LKCM Investment Partnership, L.P. (LIP), LKCM Micro-Cap Partnership, L.P. (Micro), LKCM Core Discipline, L.P. (Core), LKCM Headwater Investments II, L.P. (HW), J. Luther King, Jr. and J. Bryan King (Reporting Persons). LKCM Private Discipline Management, L.P. holds the management shares of PDP, and LKCM Alternative Management, LLC (PDP GP) is its general partner. LKCM Investment Partnership GP, LLC (LIP GP) is the general partner of LIP. LKCM Micro-Cap Management, LLC (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.

F2: LKCM is the investment manager for PDP, LIP, Micro, Core and HW. J. Luther King, Jr. is a controlling shareholder or member, as applicable, of LCKM and LIP GP. J. Bryan King is a controlling member of HW GP and a director of the issuer. J. Luther King, Jr. and J. Bryan King are controlling members of PDP GP, Micro GP and Core GP.

F3: Includes (i) 1,689,358 shares held by PDP, (ii) 250,000 shares held by LIP, (iii) 26,102 shares held by Micro, (iv) 10,128 shares held by Core, (v) 247,326 shares held by HW, (vi) 2,500 shares held by a separately managed portfolio for which LKCM serves as investment adviser, and (vii) 3,788 restricted shares held by J. Bryan King.

F4: Each of the Reporting Persons expressly disclaims membership in a group under the Securities Exchange Act of 1934, as amended, with respect to the securities reported herein, and this Form 4 shall not be deemed to be an admission that any such Reporting Person is a member of such a group. Each of the Reporting Persons expressly disclaims beneficial ownership of the securities reported herein, except to the extent of its pecuniary interest therein, and this Form 4 shall not be deemed to be an admission that any such Reporting Person is the beneficial owner of such securities for purposes of the Securities Exchange Act of 1934, as amended, or for any other purpose.