UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of ~~the~~Report ~~Securities~~(Date ~~Exchange~~of ~~Act~~earliest ofevent ~~1934~~reported): June 10, 2025

~~Date~~MUELLER ofINDUSTRIES ~~Report (Date of earliest event reported): May 8, 2025~~INC.

MUELLER INDUSTRIES, INC.

(Exact name of registrant as specified in its charter)

Delaware	~~1-6770~~	1-6770	~~25-0790410~~	25-0790410
(State or other jurisdiction of incorporation)	(Commission File Number)		(IRS Employer Identification No.)
(State or other jurisdiction		(Commission File		(IRS Employer
of incorporation)		Number)		Identification No.)

150 Schilling Blvd.
150 Schilling Boulevard	Suite 100
Suite 100
Collierville	Tennessee		38017
Collierville, Tennessee		38017
(Address of principal executive offices)			(Zip Code)
(Address of principal executive offices)		(Zip Code)


Registrant’s telephone number, including area code:			(901)			753-3200


Registrant’s Former Name or Address, if changed since last report:			N/A

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, $0.01 Par Value		MLI		New York Stock Exchange


Title of each class	Trading Symbol	Name of exchange on which registered
Common Stock	MLI	NYSE

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging ~~Growth~~growth ~~Company~~ company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new orof revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.0702 ~~Submission~~Departure of ~~Matters~~Directors toor aCertain ~~Vote~~Officers; Election of ~~Security~~Directors; ~~Holders~~Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

OnEffective ~~May 8~~August 1, 2025, Steffen Sigloch will transition from his position as Chief Manufacturing Officer of Mueller Industries, Inc. (the “Company”) ~~held~~and ~~its~~continue ~~Annual~~in ~~Meeting~~the role of ~~Stockholders,~~Strategic atAdvisor ~~which~~for ~~three~~Industry ~~proposals~~Relations. ~~were~~In ~~voted~~his ~~upon~~new role, Mr. ~~The~~Sigloch ~~results~~will ofadvise the ~~vote~~Company ~~are~~and asassist ~~follows:~~on projects utilizing his specialized expertise gained prior to and during his time at the Company.

Proposal 1 - Election of directors; the following persons were duly elected to serve, subject to the Company’s By-laws, as Directors of the Company until the next Annual Meeting, or until election and qualification of their successors: 2

	For		Withheld
Gregory L. Christopher		93,918,049		4,143,965
Elizabeth Donovan		82,122,931		15,939,083
William C. Drummond		97,584,593		477,421
Gary S. Gladstein		95,168,786		2,893,228
Scott J. Goldman		94,865,294		3,196,720
John B. Hansen		96,201,913		1,860,101
Terry Hermanson		77,809,488		20,252,526
Charles P. Herzog, Jr.		80,013,231		18,048,783

SIGNATURES

~~Proposal~~Pursuant 2to -the ~~The~~requirements ~~Company’s~~of ~~stockholders~~the ~~approved~~Securities ~~the~~Exchange ~~appointment~~Act of ~~Ernst &~~1934, ~~Young LLP~~ as amended, the ~~Company’s~~Registrant ~~independent~~has ~~auditors~~duly ~~for~~caused ~~the~~this ~~fiscal~~Report ~~year~~to ~~ending~~be ~~December 27,~~signed ~~2025:~~on its behalf by the undersigned hereunto duly authorized.

For	Against		Abstain
		MUELLER INDUSTRIES, INC.
100,489,266	2,399,333		886,740
		By:		/s/ ANTHONY J. STEINRIEDE
		Name:		Anthony J. Steinriede
		Title:		Vice President - Corporate Controller
Date: June 10, 2025

~~Proposal~~ 3 ~~- The Company’s stockholders approved an advisory vote on the compensation of the Company’s named executive officers:~~

For		Against		Abstain		Broker Non-Votes
82,878,250		14,397,940		785,824		5,713,325

Item 8.01 Other Events.

On May 9, 2025, the Company issued a press release announcing that its Board of Directors has declared a regular quarterly cash dividend on its common stock of 25 cents per share. The dividend will be payable June 20, 2025, to shareholders of record on June 6, 2025. A copy of the press release announcing the payment and record dates is attached as Exhibit 99.1.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

99.1 Press release, dated May 9, 2025.

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

MUELLER INDUSTRIES, INC. By: /s/ Anthony J. Steinriede Name: Anthony J. Steinriede Title: Vice President, Corporate Controller

Date: May 12, 2025

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