Form 8-K

8-K — MUELLER INDUSTRIES INC

Accession: 0000089439-26-000025

Filed: 2026-06-02

Period: 2026-06-02

CIK: 0000089439

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

Item: Other Events

Item: Financial Statements and Exhibits

Documents

8-K — mli-20260602.htm (Primary)

EX-99.1 (ex-99_16302026stocksplit.htm)

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8-K

8-K (Primary)

Filename: mli-20260602.htm · Sequence: 1

mli-20260602

0000089439FALSE00000894392026-06-022026-06-02

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): June 2, 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 8.01. Other Events.

On June 1, 2026, the Company announced a two-for-one forward stock split (the “Stock Split”), of the Company’s issued common stock to be effected through the filing of an amendment to the Company's Restated Certificate of Incorporation (the “Amendment”), with the Secretary of the State of Delaware. The Amendment will result in a proportionate increase in the number of shares of authorized common stock. As a result of the Stock Split, each record holder of common stock as of the close of market on Thursday, June 25, 2026 will receive one additional share of common stock, to be distributed after the close of market on Tuesday, June 30, 2026. Trading is expected to commence on a split-adjusted basis at market open on Wednesday, July 1, 2026.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

99.1

Press release, dated June 1, 2026.

SIGNATURES

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/ CHRISTOPHER J. MIRITELLO

Name: Christopher J. Miritello

Title: Executive Vice President - General Counsel & Secretary

June 2, 2026

EX-99.1

Filename: ex-99_16302026stocksplit.htm · Sequence: 2

Document

Mueller Industries, Inc. Announces Two-for-One Stock Split

COLLIERVILLE, Tenn., June 1, 2026 -- Mueller Industries, Inc. (NYSE: MLI) announced today that its Board of Directors has declared a two-for-one forward stock split. The Board of Directors also approved a proportionate increase in the number of authorized shares of common stock to accommodate the stock split. As a result of the stock split, which will be effected through an amendment to the Company’s Restated Certificate of Incorporation, each stockholder of record as of the close of trading on June 25, 2026 (the “record date”) will receive one additional share for every share held as of the record date. The additional share is expected to be distributed after the close of trading on June 30, 2026, and trading is expected to begin on a split-adjusted basis at market open on July 1, 2026, subject to the approval of the New York Stock Exchange.

The stock split is expected to increase the number of shares of the Company’s outstanding common stock to approximately 221.1 million. As a result of the stock split, proportionate adjustments will be made to the number of shares of the Company’s common stock underlying the Company’s outstanding stock awards, the number of shares issuable under the Company’s equity incentive plans, the Company’s regular quarterly stock dividend and other agreements. The Company anticipates filing a Form 8-K with the U.S. Securities and Exchange Commission after the effective date to report an amendment to the Company’s Restated Certificate of Incorporation effecting the stock split and reflecting a proportionate adjustment to the total number of authorized shares of the Company’s common stock.

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 risks relating to whether our shareholders will approve the proposed charter amendment, 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

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