# EDGAR Filing Document

**Accession Number:** 0001406297
**File Stem:** 0000310051-23-000005
**Filing Date:** 2023-3
**Character Count:** 23012
**Document Hash:** 39be495c89edac5dc2183f294be1757e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000310051-23-000005.hdr.sgml**: 20230322

**ACCESSION NUMBER**: 0000310051-23-000005

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20230320

**FILED AS OF DATE**: 20230322

**DATE AS OF CHANGE**: 20230322

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** KING LUTHER CAPITAL MANAGEMENT CORP
- **CENTRAL INDEX KEY:** 0000310051
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-10546
- **FILM NUMBER:** 23751284

**BUSINESS ADDRESS:**
- **STREET 1:** 301 COMMERCE SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
- **BUSINESS PHONE:** 8173323235

**MAIL ADDRESS:**
- **STREET 1:** 301 COMMERCE SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** LKCM Private Discipline Master Fund, SPC
- **CENTRAL INDEX KEY:** 0001406372

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-10546
- **FILM NUMBER:** 23751283

**BUSINESS ADDRESS:**
- **STREET 1:** PO BOX 309GT
- **STREET 2:** UGLAND HOUSE, SOUTH CHURCH STREET
- **CITY:** GRAND CAYMAN
- **STATE:** E9
- **ZIP:** 00000
- **BUSINESS PHONE:** 817-332-3235

**MAIL ADDRESS:**
- **STREET 1:** PO BOX 309GT
- **STREET 2:** UGLAND HOUSE, SOUTH CHURCH STREET
- **CITY:** GRAND CAYMAN
- **STATE:** E9
- **ZIP:** 00000
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** King Luther Jr
- **CENTRAL INDEX KEY:** 0001290407

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-10546
- **FILM NUMBER:** 23751276

**MAIL ADDRESS:**
- **STREET 1:** 5949 SHERRY LANE, SUITE 1400
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75225
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** King John Bryan
- **CENTRAL INDEX KEY:** 0001406297

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-10546
- **FILM NUMBER:** 23751275

**MAIL ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET
- **STREET 2:** SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** LKCM Investment Partnership, L.P.
- **CENTRAL INDEX KEY:** 0001406371
- **STATE OF INCORPORATION:** TX
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-10546
- **FILM NUMBER:** 23751282

**BUSINESS ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET
- **STREET 2:** SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
- **BUSINESS PHONE:** 817-332-3235

**MAIL ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET
- **STREET 2:** SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** LKCM Headwater Investments III, L.P.
- **CENTRAL INDEX KEY:** 0001764096
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-10546
- **FILM NUMBER:** 23751277

**BUSINESS ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET
- **STREET 2:** SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
- **BUSINESS PHONE:** 817-332-3235

**MAIL ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET
- **STREET 2:** SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** LKCM Core Discipline, L.P.
- **CENTRAL INDEX KEY:** 0001502283
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-10546
- **FILM NUMBER:** 23751281

**BUSINESS ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET, SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
- **BUSINESS PHONE:** 817-332-3235

**MAIL ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET, SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102

**FORMER NAME:**
- **FORMER CONFORMED NAME:** LKCM Long-Short Onshore Fund, L.P.
- **DATE OF NAME CHANGE:** 20100928
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** LKCM Micro-Cap Partnership, L.P.
- **CENTRAL INDEX KEY:** 0001502285
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-10546
- **FILM NUMBER:** 23751280

**BUSINESS ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET
- **STREET 2:** SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
- **BUSINESS PHONE:** 817-332-3235

**MAIL ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET
- **STREET 2:** SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** LKCM Headwater Investments II, L.P.
- **CENTRAL INDEX KEY:** 0001621801
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-10546
- **FILM NUMBER:** 23751279

**BUSINESS ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET
- **STREET 2:** SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
- **BUSINESS PHONE:** 817-332-3235

**MAIL ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET
- **STREET 2:** SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** LKCM Headwater II Sidecar Partnership, L.P.
- **CENTRAL INDEX KEY:** 0001713995
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-10546
- **FILM NUMBER:** 23751278

**BUSINESS ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET
- **STREET 2:** SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
- **BUSINESS PHONE:** 817-332-3235

**MAIL ADDRESS:**
- **STREET 1:** 301 COMMERCE STREET
- **STREET 2:** SUITE 1600
- **CITY:** FORT WORTH
- **STATE:** TX
- **ZIP:** 76102
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Distribution Solutions Group, Inc.
- **CENTRAL INDEX KEY:** 0000703604
- **STANDARD INDUSTRIAL CLASSIFICATION:** WHOLESALE-MACHINERY, EQUIPMENT & SUPPLIES [5080]
- **IRS NUMBER:** 362229304
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 8770 WEST BRYN MAWR AVENUE
- **STREET 2:** SUITE 900
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60631
- **BUSINESS PHONE:** 773-304-5220

**MAIL ADDRESS:**
- **STREET 1:** 8770 WEST BRYN MAWR AVENUE
- **STREET 2:** SUITE 900
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60631

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** LAWSON PRODUCTS INC/NEW/DE/
- **DATE OF NAME CHANGE:** 19920703

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>KING LUTHER CAPITAL MANAGEMENT CORP<br><sub>(Last) (First) (Middle)</sub><br>301 COMMERCE SUITE 1600<br><sub>(Street)</sub><br>FORT WORTH, TX 76102<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-03-20 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Distribution Solutions Group, Inc. [ DSGR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>LKCM Private Discipline Master Fund, SPC<br><sub>(Last) (First) (Middle)</sub><br>PO BOX 309GT<br>UGLAND HOUSE, SOUTH CHURCH STREET<br><sub>(Street)</sub><br>GRAND CAYMAN, E9 00000<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-03-20 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Distribution Solutions Group, Inc. [ DSGR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>LKCM Investment Partnership, L.P.<br><sub>(Last) (First) (Middle)</sub><br>301 COMMERCE STREET<br>SUITE 1600<br><sub>(Street)</sub><br>FORT WORTH, TX 76102<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-03-20 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Distribution Solutions Group, Inc. [ DSGR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>LKCM Core Discipline, L.P.<br><sub>(Last) (First) (Middle)</sub><br>301 COMMERCE STREET, SUITE 1600<br><sub>(Street)</sub><br>FORT WORTH, TX 76102<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-03-20 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Distribution Solutions Group, Inc. [ DSGR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>LKCM Micro-Cap Partnership, L.P.<br><sub>(Last) (First) (Middle)</sub><br>301 COMMERCE STREET<br>SUITE 1600<br><sub>(Street)</sub><br>FORT WORTH, TX 76102<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-03-20 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Distribution Solutions Group, Inc. [ DSGR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>LKCM Headwater Investments II, L.P.<br><sub>(Last) (First) (Middle)</sub><br>301 COMMERCE STREET<br>SUITE 1600<br><sub>(Street)</sub><br>FORT WORTH, TX 76102<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-03-20 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Distribution Solutions Group, Inc. [ DSGR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>LKCM Headwater II Sidecar Partnership, L.P.<br><sub>(Last) (First) (Middle)</sub><br>301 COMMERCE STREET<br>SUITE 1600<br><sub>(Street)</sub><br>FORT WORTH, TX 76102<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-03-20 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Distribution Solutions Group, Inc. [ DSGR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>LKCM Headwater Investments III, L.P.<br><sub>(Last) (First) (Middle)</sub><br>301 COMMERCE STREET<br>SUITE 1600<br><sub>(Street)</sub><br>FORT WORTH, TX 76102<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-03-20 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Distribution Solutions Group, Inc. [ DSGR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>King Luther Jr<br><sub>(Last) (First) (Middle)</sub><br>5949 SHERRY LANE, SUITE 1400<br><sub>(Street)</sub><br>DALLAS, TX 75225<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-03-20 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Distribution Solutions Group, Inc. [ DSGR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>King John Bryan<br><sub>(Last) (First) (Middle)</sub><br>301 COMMERCE STREET<br>SUITE 1600<br><sub>(Street)</sub><br>FORT WORTH, TX 76102<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-03-20 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Distribution Solutions Group, Inc. [ DSGR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2023-03-20 |  | J<sup>(1)</sup> |  | 1700000<sup>(1)</sup> | A | 0<sup>(2)</sup> | 16360556 | I | See footnotes<sup>(3)(4)(5)(6)</sup> |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) On March 20, 2023, the Issuer issued (i) 700,000 shares of Common Stock to LKCM TE Investors, LLC (TestEquity Investors) pursuant to the terms of the earnout provisions of the Agreement and Plan of Merger, dated December 29, 2021, by and among TestEquity Investors, the Issuer and the other parties thereto, and (ii) 1,000,000 shares of Common Stock to 301 HW Opus Investors, LLC (Gexpro Investors) pursuant to the terms of the earnout provisions of the Agreement and Plan of Merger, dated December 29, 2021, by and among Gexpro Investors, the Issuer and the other parties thereto.

(2) Not applicable.

(3) 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 Core Discipline, L.P. (Core), LKCM Micro-Cap Partnership, L.P. (Micro), LKCM Headwater Investments II, L.P. (HW2), LKCM Headwater II Sidecar Partnership, L.P. (Sidecar), Headwater Lawson Investors, LLC (HLI), LKCM Headwater Investments III, L.P. (HW3), TestEquity Investors, Gexpro Investors, J. Luther King, Jr. and J. Bryan King (Reporting Persons).

(4) 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 Core Discipline Management, L.P. (Core GP) is the general partner of Core. LKCM Micro-Cap Management, L.P. (Micro GP) is the general partner of Micro. LKCM Headwater Investments II GP, L.P. (HW2 GP) is the general partner of HW2. LKCM Headwater II Sidecar Partnership GP, L.P. (Sidecar GP) is the general partner of Sidecar. LKCM Headwater Investments III GP, L.P. (HW3 GP) is the general partner of HW3. LKCM Headwater Investments GP, LLC (Ultimate GP) is the general partner of each of HW2 GP, Sidecar GP, and HW3 GP. HW2 and Sidecar are the beneficial owners of HLI and TestEquity Investors, and HW3 is the beneficial owner of Gexpro Investors.

(5) Includes (i) 1,699,871 shares held by PDP, (ii) 250,000 shares held by LIP, (iii) 26,827 shares held by Micro, (iv) 10,490 shares held by Core, (v) 1,761,494 shares held by HLI, (vi) 592,326 shares held by HW2, (vii) 8,000,000 shares held by Gexpro Investors, (viii) 4,000,000 shares held by TestEquity Investors, (ix) 2,500 shares held by a separately managed portfolio for which LKCM serves as investment manager, and (x) 17,048 shares held directly by J. Bryan King.

(6) 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 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 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.

**Signature:** J. Bryan King, for Luther King Capital Management Corporation  
**Date:** 2023-03-22

**Signature:** J. Bryan King, for LKCM Private Discipline Master Fund, SPC  
**Date:** 2023-03-22

**Signature:** J. Luther King, Jr., for LKCM Investment Partnership, L.P.  
**Date:** 2023-03-22

**Signature:** J. Bryan King, for LKCM Core Discipline, L.P.  
**Date:** 2023-03-22

**Signature:** J. Bryan King, for LKCM Micro-Cap Partnership, L.P.  
**Date:** 2023-03-22

**Signature:** J. Bryan King, for LKCM Headwater Investments II, L.P.  
**Date:** 2023-03-22

**Signature:** J. Bryan King, for LKCM Headwater II Sidecar Partnership, L.P.  
**Date:** 2023-03-22

**Signature:** J. Bryan King, for LKCM Headwater Investments III, L.P.  
**Date:** 2023-03-22

**Signature:** J. Bryan King  
**Date:** 2023-03-22

**Signature:** J. Luther King, Jr.  
**Date:** 2023-03-22

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**