Carpenter Technology Corp — Current Report (Form 8-K)

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: July 26, 2026

CARPENTER TECHNOLOGY CORPORATION

(Exact name of registrant as specified in its charter)

(610) 208-2000

Registrant’s telephone number, including area code

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:

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

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 or 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 July 24, 2026, Brian J. Malloy, the President and Chief Executive Officer and a director of Carpenter Technology Corporation (the “Company”), passed away suddenly and unexpectedly.

On July 26, 2026, the Board of Directors (the “Board”) of the Company appointed Tony R. Thene to return to his capacity as the Chief Executive Officer of the Company, a role which he previously held from 2015 through June 2026. The Board also appointed Mr. Thene to his previous roles of Chairman of the Board and President of the Company.

Biographical and other information about Mr. Thene is included in the Company’s Annual Report on Form 10-K filed with the U.S. Securities and Exchange Commission on August 12, 2025 and the Company’s definitive proxy statement on Schedule 14A filed with the U.S. Securities and Exchange Commission on September 12, 2025. Mr. Thene does not have any family relationships with any director or executive officer of the Company, and there are no arrangements or understandings between Mr. Thene and any other persons pursuant to which Mr. Thene was selected to his position. Neither Mr. Thene nor any related person of Mr. Thene has a direct or indirect material interest in any existing or currently proposed transaction to which the Company is or may become a party that would require disclosure under Item 404(a) of Regulation S-K promulgated under the Securities Exchange Act of 1934, as amended.

Item 7.01 – Regulation FD Disclosure.

A copy of the press release announcing the passing of Mr. Malloy and appointment of Mr. Thene is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information in Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1 attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. The information in Item 7.01 and in Exhibit 99.1 shall not be incorporated by reference into any registration statement or other document filed with the Securities and Exchange Commission by the Company, whether before or after the date hereof, regardless of any general incorporation language in such filing, except as shall be expressly set forth by specific reference in such filing.

Item 9.01 - Financial Statements and Exhibits.

(d) Exhibits

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.

Date: July 28, 2026