ALLETE Inc. Files 8-K on December 10, 2025 Events

TL;DR

ALLETE filed an 8-K on 12/11 for 12/10 events - check for Reg FD, other news, or financials.

AI Summary

ALLETE, Inc. filed an 8-K on December 11, 2025, reporting events that occurred on December 10, 2025. The filing includes information related to Regulation FD Disclosure, Other Events, and Financial Statements and Exhibits. Specific details regarding the nature of these events or any financial figures were not provided in the excerpt.

Why It Matters

This filing indicates that ALLETE, Inc. has made a regulatory disclosure or reported other significant events on December 10, 2025, which could impact investors' understanding of the company's current status.

Risk Assessment

Risk Level: low — The provided text is a standard SEC filing header and does not contain specific operational, financial, or strategic information that would indicate a high-risk event.

Key Players & Entities

• ALLETE, Inc. (company) — Registrant
• December 10, 2025 (date) — Date of Earliest Event Reported
• December 11, 2025 (date) — Date of Report
• 30 West Superior Street (location) — Principal executive offices address
• Duluth, Minnesota (location) — Principal executive offices city and state

FAQ

Key Financial Figures

• $0.008 — he Board, will be in an amount equal to $0.008 per share of Common Stock (which reflec
• $0.73 — cent regular quarterly dividend rate of $0.73 per share, divided by 91 days) multipli

Filing Documents

• ef20060783_8k.htm (8-K) — 40KB
• ef20060783_ex99-1.htm (EX-99.1) — 12KB
• image00003.jpg (GRAPHIC) — 4KB
• image00008.jpg (GRAPHIC) — 6KB
• 0001140361-25-045242.txt ( ) — 198KB
• ale-20251210.xsd (EX-101.SCH) — 4KB
• ale-20251210_lab.xml (EX-101.LAB) — 21KB
• ale-20251210_pre.xml (EX-101.PRE) — 16KB
• ef20060783_8k_htm.xml (XML) — 4KB

01

Item 7.01 Regulation FD Disclosure. On December 11, 2025, ALLETE, Inc. (the "Company") issued a press release announcing that the Company has reviewed the final written order from the Minnesota Public Utilities Commission (the "MPUC") approving the Merger (as defined below) and that the Company expects the Merger to close on or about December 15, 2025, subject to the satisfaction or waiver of the remaining closing conditions. The press release is attached to this report as Exhibit 99.1 and is incorporated herein by reference. The press release is being furnished, not filed, pursuant to Regulation FD. Accordingly, the press release will not be incorporated by reference into any registration statement filed by the Company under the Securities Act of 1933, as amended (the "Securities Act"), unless specifically identified therein as being incorporated therein by reference. The furnishing of the press release is not intended to, and does not, constitute a determination or admission by the Company that the information in the press release is material or complete, or that investors should consider this information before making an investment decision with respect to any security of the Company or any of its affiliates. SECTION 8 – OTHER EVENTS

01

Item 8.01 Other Events. MPUC Final Written Order and Expected Closing Date As previously announced, on May 5, 2024, the Company entered into an Agreement and Plan of Merger (the "Merger Agreement") by and among the Company, Alloy Parent LLC, a Delaware limited liability company ("Parent"), and Alloy Merger Sub LLC, a Delaware limited liability company and wholly owned subsidiary of Parent ("Merger Sub"). Pursuant to the Merger Agreement, on the terms and subject to the conditions set forth therein, Merger Sub will merge with and into the Company (the "Merger"), with the Company continuing as the surviving corporation in the Merger and becoming a subsidiary of Parent. On October 3, 2025, the MPUC held a public hearing in which the MPUC voted in favor of approval of the Merger. A final written order approving the Merger was issued by the MPUC on December 10 , 2025. The Company's shareholders previously approved the Merger, and the Company previously received all other regulatory approvals and consents required to consummate the Merger. The Company expects the Merger to close on or about December 15 , 2025, subject to satisfaction or waiver of the remaining conditions to the closing of the Merger in accordance with the Merger Agreement (the "Closing"). There can be no assurance that the closing of the Merger will occur on the expected timeline. As a result of the Closing, shares of common stock, without par value, of the Company (the "Common Stock") will cease to be listed for trading on the New York Stock Exchange. Stub Period Dividend As previously disclosed, the board of directors of the Company (the "Board") fixed October 16, 2025, as the record date for the Stub Period Dividend (defined below), provided holders of Common Stock hold their shares to the Closing. The Company expects that prior to the Closing, the Board will declare a Stub Period Dividend as allowed by the terms and provisions of the Merger Agreement. The Company expects that the dividend, as

Financial Statements and Exhibits

Financial Statements and Exhibits. (d) Exhibits Exhibit Description 99.1 Press Release, dated December 11, 2025 104 Cover Page Interactive Data File (embedded within the Inline XBRL document). Readers are cautioned that forward-looking statements should be read in conjunction with disclosures under the heading: "Forward-Looking Statements" located on page 2 of this Current Report on Form 8-K. 1 ALLETE, Inc. Form 8-K dated December 11 , 2025

Forward-Looking Statements

Forward-Looking Statements This Form 8-K contains "forward-looking statements" within the meaning of the federal securities laws, including safe harbor provisions of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended, including statements regarding the proposed acquisition of the Company, payment or timing of dividends, if any, regulatory approvals, the expected timetable for completing the proposed transaction and any other statements regarding the Company's future expectations, beliefs, plans, objectives, financial conditions, assumptions or future events or performance that are not historical facts. This information may involve risks and uncertainties that could cause actual results to differ materially from such forward-looking statements. These risks and uncertainties include, but are not limited to: the timing to consummate the proposed transaction; the risk that the conditions to closing of the proposed transaction may not be satisfied; the risk that a regulatory approval that may be required for the proposed transaction is not obtained or is obtained management's time on transaction-related issues. When used in this Form 8-K, or any other documents, words such as "anticipate," "believe," "estimate," "expect," "forecast," "target," "could," "goal," "intend," "objective," "plan," "project," "seek," "strategy," "target," "may," "will" and similar expressions are intended to identify forward-looking statements. These forward-looking statements are based on the beliefs and assumptions of management at the time that these statements were prepared and are inherently uncertain. Such forward-looking statements are subject to

SIGNATURES

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 thereunto duly authorized. ALLETE, Inc. December 11, 202 5 /s/ Julie L. Padilla Julie L. Padilla Vice President, Chief Legal Officer and Corporate Secretary 3 ALLETE, Inc. Form 8-K dated December 11 , 2025

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View this 8-K filing on SEC EDGAR