MUELLER INDUSTRIES INC

(a)The following documents are filed as part of this report:

1. Financial Statements: the financial statements, notes, and report of independent registered public accounting firm described in Item 8 of this Annual Report on Form 10-K are contained in a separate section of this Annual Report on Form 10-K commencing on page F-1.

2. Financial Statement Schedule: the financial statement schedule described in Item 8 of this report is contained in a separate section of this Annual Report on Form 10-K commencing on page F-1.

3. Exhibits:

Certificate of Incorporation and Bylaws

3.a Restated Certificate of Incorporation of the Registrant dated February 8, 2007 (Incorporated herein by reference to Exhibit 3.1 of the Registrant’s Annual Report on Form 10-K, dated February 28, 2007, for the fiscal year ended December 30, 2006).

3.b Amended and Restated By-laws of the Registrant, effective as of February 17, 2023 (Incorporated herein by reference to Exhibit 3.1 of the Registrant’s Current Report on Form 8-K, dated February 21, 2023).

Long-Term Debt Instruments

4.1 Certain instruments with respect to long-term debt of the Registrant have not been filed as Exhibits to this Report since the total amount of securities authorized under any such instruments does not exceed 10 percent of the total assets of the Registrant and its subsidiaries on a consolidated basis. The Registrant agrees to furnish a copy of each such instrument upon request of the SEC.

4.2 Description of securities

Consulting, Employment, and Compensatory Plan Agreements

10.1 Mueller Industries, Inc. 2009 Stock Incentive Plan (Incorporated by reference from Appendix I to the Company’s 2009 Definitive Proxy Statement with respect to the Company’s 2009 Annual Meeting of Stockholders, as filed with the Securities and Exchange Commission on March 26, 2009).

10.2 Mueller Industries, Inc. 2014 Stock Incentive Plan (Incorporated by reference from Appendix I to the Company’s 2014 Definitive Proxy Statement with respect to the Company’s 2014 Annual Meeting of Stockholders, as filed with the Securities and Exchange Commission on March 19, 2014).

10.3 Amendment to the Mueller Industries, Inc. 2009 Stock Incentive Plan, dated July 11, 2011 (Incorporated herein by reference to Exhibit 10.17 of the Registrant’s Annual Report on Form 10-K, dated February 28, 2012, for the fiscal year ended December 31, 2011).

10.42019 Incentive Plan (incorporated by reference to Annex 1 to the Company’s definitive proxy statement filed with the SEC on March 28, 2019).

10.5 Mueller Industries, Inc. 2011 Annual Bonus Plan (Incorporated herein by reference to Exhibit 10.18 of the Registrant’s Annual Report on Form 10-K, dated February 28, 2012, for the fiscal year ended December 31, 2011).

10.6 Summary description of the Registrant’s 2024 incentive plan for certain key employees.

10.7 Change in Control Agreement, effective July 26, 2016 by and between the Registrant and Brian K. Barksdale (Incorporated herein by reference to Exhibit 10.3 of the Registrant’s Quarterly Report on Form 10-Q, for the period ended July 2, 2016, dated July 28, 2016).

10.8 Change in Control Agreement, effective July 26, 2016 by and between the Registrant and Mark Millerchip (Incorporated herein by reference to Exhibit 10.6 of the Registrant’s Quarterly Report on Form 10-Q, for the period ended July 2, 2016, dated July 28, 2016).

10.9 Change in Control Agreement, effective July 26, 2016 by and between the Registrant and Steffen Sigloch (Incorporated herein by reference to Exhibit 10.8 of the Registrant’s Quarterly Report on Form 10-Q, for the period ended July 2, 2016, dated July 28, 2016).

10.10 Employment Agreement, dated as of March 15, 2018, by and between Mueller Industries, Inc. and Gregory L. Christopher (Incorporated herein by reference to Exhibit 10.1 of the Registrant’s Current Report on Form 8-K, dated March 19, 2018).

10.11 Change in Control Agreement, effective February 22, 2022 by and between the Registrant and Jeffrey A. Martin (Incorporated herein by reference to Exhibit 10.13 of the Registrant’s Annual Report on Form 10-K, for the period ended December 25, 2021, dated February 23, 2022).

10.12 Change in Control Agreement, effective February 22, 2022 by and between the Registrant and Christopher J. Miritello (Incorporated herein by reference to Exhibit 10.14 of the Registrant’s Annual Report on Form 10-K, for the period ended December 25, 2021, dated February 23, 2022).

Financing Agreements

10.13 Credit Agreement, dated as of March 31, 2021, among the Company (as borrower), Bank of America, N.A. (as administrative agent), and certain lenders named therein (Incorporated herein by reference to Exhibit 10.1 of the Registrant’s Current Report on Form 8-K, dated April 5, 2021).

Other Exhibits

19.0 Insider Trading Policy of the Registrant (Incorporated herein by reference to Exhibit 99.1 of the Registrant’s Annual Report on Form 10-K, for the period ended December 31, 2022, dated February 28, 2023).

21.0 Subsidiaries of the Registrant.

23.0 Consent of Independent Registered Public Accounting Firm.

31.1 Certification of Chief Executive Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended.

31.2 Certification of Chief Financial Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended.

32.1 Certification of Chief Executive Officer pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.2 Certification of Chief Financial Officer pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

97.0 Clawback Policy of the Registrant

101.CAL XBRL Taxonomy Extension Calculation Linkbase

101.DEF XBRL Taxonomy Extension Definition Linkbase

101.INS XBRL Instance Document

101.LAB XBRL Taxonomy Extension Label Linkbase

101.PRE XBRL Presentation Linkbase Document

101.SCH XBRL Taxonomy Extension Schema