Form 8-K

8-K — MUELLER INDUSTRIES INC

Accession: 0000089439-26-000036

Filed: 2026-08-10

Period: 2026-08-06

CIK: 0000089439

SIC: 3350 (ROLLING DRAWING & EXTRUDING OF NONFERROUS METALS)

Item: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Item: Other Events

Item: Financial Statements and Exhibits

Documents

8-K — mli-20260806.htm (Primary)

EX-99.1 (ex-99_1q32026dividend.htm)

EX-99.2 (ex-99_2gladsteinretirement.htm)

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8-K

8-K (Primary)

Filename: mli-20260806.htm · Sequence: 1

mli-20260806

0000089439false00000894392026-02-202026-02-20

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 Report (Date of earliest event reported): August 6, 2026

MUELLER INDUSTRIES INC.

(Exact name of registrant as specified in its charter)

Delaware 1-6770 25-0790410

(State or other jurisdiction (Commission File (IRS Employer

of incorporation) Number) Identification No.)

150 Schilling Boulevard Suite 100

Collierville Tennessee 38017

(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))

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

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 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 of revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On August 6, 2026, Mr. Gary S. Gladstein notified the Board of Directors (the “Board”) of Mueller Industries, Inc. (the “Company”) that he will retire from the Board effective December 31, 2026. Mr. Gladstein previously served as a member of the Board from 1990 to 1994 and then rejoined the Board in 2000. He later held the positions of Chairman of the Board from 2013 to 2015 and Lead Independent Director from 2016 to 2018.

Item 8.01 Other Events.

On August 6, 2026 the Registrant issued a press release announcing that its Board has declared a regular quarterly cash dividend of 17.5 cents per share on its common stock. The dividend will be paid September 18, 2026 to shareholders of record on September 4, 2026. 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 August 6, 2026

99.2

Press release dated August 7, 2026

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, 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: August 10, 2026

EX-99.1

Filename: ex-99_1q32026dividend.htm · Sequence: 2

Document

Mueller Industries, Inc. Declares Cash Dividend for Third Quarter

COLLIERVILLE, Tenn., August 6, 2026 – Mueller Industries, Inc. (NYSE: MLI) announced today that its Board of Directors has declared a regular quarterly cash dividend on its common stock of 17.5 cents per share. The dividend will be payable September 18, 2026 to shareholders of record on September 4, 2026.

Mueller Industries, Inc. (NYSE: MLI) is an industrial corporation whose holdings manufacture vital goods for important markets such as air, water, oil and gas distribution; climate comfort; food preservation; electrical transmission; medical; aerospace; and automotive. It includes a network of companies and brands throughout North America, Europe, Asia, and the Middle East.

*********************

Statements in this release that are not strictly historical may be "forward-looking" statements, which involve risks and uncertainties. These include economic and currency conditions, continued availability of raw materials and energy, market demand, pricing, competitive and technological factors, and the availability of financing, among others, as set forth in the Company's SEC filings. The words "outlook," "estimate," "project," "intend," "expect," "believe," "target," "encourage," "anticipate," "appear," and similar expressions are intended to identify forward-looking statements. The reader should not place undue reliance on forward-looking statements, which speak only as of the date of this report. The Company has no obligation to publicly update or revise any forward-looking statements to reflect events after the date of this report.

CONTACT

Jeffrey A. Martin

(901)753-3226

EX-99.2

Filename: ex-99_2gladsteinretirement.htm · Sequence: 3

Document

Mueller Industries, Inc. Announces Retirement of Gary S. Gladstein from the Board of Directors Effective December 31, 2026

COLLIERVILLE, Tenn., August 7, 2026 – Mueller Industries, Inc. (NYSE: MLI) announced today that effective December 31, 2026, Gary S. Gladstein, who has served on the Board a combined 30 years, including three years as Chairman and three years as Lead Independent Director, will retire from Board service.

On the transition, Greg Christopher, Chairman and CEO stated “We are grateful for Gary’s commitment to our Company and thank him for his three decades of service. Gary has played an instrumental role in the long-term success of our Company, from its emergence from bankruptcy in the early 1990s, to its growth into a $15 billion enterprise. We appreciate his many valuable contributions to our Board and wish him the very best in his retirement.”

*********************

CONTACT

Jeffrey A. Martin

(901)753-3226

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