NACCO INDUSTRIES INC

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

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:

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

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b2 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 or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Effective August 19, 2026, Mr. Patrick J. Burns was appointed to the Board of Directors (the “Board”) of NACCO Industries, Inc. (the “Company”). In connection with the appointment of Mr. Burns, the size of the Board was increased from 11 to 12 members.

Mr. Burns served as the Chief Executive Officer of Precision Fabrics Group, Inc. (“Precision Fabrics”) from 2022 to July 2026. Prior to rejoining Precision Fabrics in 2022, Mr. Burns served in various leadership roles with the company from 1998 to 2014, including as Co-Chief Executive Officer and Chief Financial Officer. From 2014 to 2022, Mr. Burns served as the Chief Executive Officer of AGY Holdings Corp., a global leader in high performance glass fiber materials. Mr. Burns has over thirty years of experience in financial and business development leadership roles. The Board believes the Company will benefit from his extensive financial and senior executive experience.

The Board has determined that Mr. Burns qualifies as an “independent director” under the applicable listing standards of the New York Stock Exchange, the rules and regulations of the Securities and Exchange Commission (“SEC”) and the Company’s corporate governance guidelines.

Mr. Burns will participate in the Company’s standard compensation program for non-employee directors as described in the Company’s