KING LUTHER CAPITAL MANAGEMENT CORP - 14 Mar 2026 SCHEDULE 13D/A Report for Distribution Solutions Group, Inc. Common Stock, $1.00 par value (DSGR)

Reporting Managers (14)

Name	Ownership	Shares Owned	sole voting power	Signature	Title	CIK
LKCM Private Discipline Master Fund, SPC / PDLP Lawson, LLC	7.7%	3,578,228	3,578,228	/s/ J. Bryan King	President	0001406372
LKCM Investment Partnership, L.P.	1.2%	552,500	552,500	/s/ J Luther King, Jr.	President of the General Partner	0001406371
LKCM Micro-Cap Partnership, L.P.	0.1%	56,470	56,470	/s/ J. Bryan King	President	0001502285
LKCM Core Discipline, L.P.	0.1%	23,182	23,182	/s/ J. Bryan King	President	0001502283
LKCM Headwater Investments II, L.P.	2.6%	1,184,652	1,184,652	/s/ J. Bryan King	President of the General Partner	0001621801
LKCM Headwater II Sidecar Partnership, L.P.	0%	0	0	/s/ J. Bryan King	President of the General Partner	0001713995
LKCM Headwater Investments III, L.P.	0%	0	0	/s/ J. Bryan King	President of the General Partner	0001764096
301 HW Opus Investors, LLC	35%	16,000,000	16,000,000	/s/ J. Bryan King	President	0001921598
LKCM TE Investors, LLC	17%	8,000,000	8,000,000	/s/ J. Bryan King	President	0001921624
Headwater Lawson Investors, LLC	7.6%	3,522,988	3,522,988	/s/ J. Bryan King	President	0001765653
LKCM Headwater Investments IV, L.P.	7.4%	3,434,044	3,434,044	/s/ J. Bryan King	President of the General Partner	0001955947
Luther King Capital Management Corporation	79%	36,357,588	36,357,588	/s/ J. Bryan King	Principal and Vice President	0000310051
J. Luther King, Jr.	79%	36,357,588	36,357,588	/s/ J. Luther King, Jr.	J. Luther King, Jr.	0001290407
J. Bryan King	78%	35,838,638	35,838,638	/s/ J. Bryan King	J. Bryan King	0001406297