Director — Kenneth J. Giacobbe: The filing primarily concerns the appointment of a new independent director and the routine non-re-election/resignation of existing directors at an annual meeting, which are standard governance events rather than executive management changes.

Results of Operations and Financial Condition. On July 30, 2026, Carpenter Technology Corporation issued a press release announcing fiscal year 2026 fourth quarter results for the period ended June 30, 2026. A copy of the press release is furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

Results of Operations and Financial Condition. On July 30, 2026, Carpenter Technology Corporation held its fourth quarter fiscal year 2026 earnings call, broadcast live by webcast. A copy of the slides presented during the call are furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

President and Chief Executive Officer and Director — Brian J. Malloy: The sudden unexpected death of the CEO and President.

Results of Operations and Financial Condition. On April 29, 2026, Carpenter Technology Corporation held its third quarter fiscal year 2026 earnings call, broadcast live by webcast. A copy of the slides presented during the call are furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

Results of Operations and Financial Condition. On April 29, 2026, Carpenter Technology Corporation issued a press release announcing fiscal year 2026 third quarter results for the period ended March 31, 2026. A copy of the press release is furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

President and Chief Executive Officer — Brian J. Malloy: Brian J. Malloy was promoted to President and Chief Executive Officer.

CEO — Tony R. Thene: Tony R. Thene is resigning as CEO and being succeeded by Brian Malloy, with Thene becoming Executive Chairman.

Results of Operations and Financial Condition. On January 29, 2026, Carpenter Technology Corporation issued a press release announcing fiscal 2026 second quarter results for the period ended December 31, 2025. A copy of the press release is furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

Results of Operations and Financial Condition. On January 29, 2026, Carpenter Technology Corporation held its second quarter fiscal year 2026 earnings call, broadcast live by webcast. A copy of the slides presented during the call are furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

Creation of Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth in

Entry into a Material Definitive Agreement. On November 20, 2025, Carpenter Technology Corporation (the “Company”) completed its previously announced offer and sale of $700.0 million aggregate principal amount of 5.625% senior notes due 2034 (the “Notes”). Indenture The Notes were issued pursuant to an indenture, dated as of November 20, 2025 (the “Indenture”), among the Company and U.S. Bank Trust Company, National Association, as trustee (in such capacity, the “Trustee”), which includes a f…

Regulation FD Disclosure. On November 10, 2025, Carpenter Technology Company (the “Company”) issued a press release announcing the pricing of an offering of $700.0 million aggregate principal amount of 5.625% senior notes due 2034 (the “Notes”) in a private offering. A copy of the press release is attached hereto as Exhibit 99.1 to this Current Report. The Notes have not been and will not be registered under the Securities Act of 1933, as amended (the “Securities Act”), or the securities laws…

Regulation FD Disclosure. On November 10, 2025, Carpenter Technology Company (the “Company”) issued a press release to announce that it intends to offer, subject to market and other conditions, $700.0 million aggregate principal amount of senior notes due 2034 (the “Notes”) in a private offering (the “Offering”). A copy of the press release is attached hereto as Exhibit 99.1 to this Current Report. The Notes have not been and will not be registered under the Securities Act of 1933, as amended…

Results of Operations and Financial Condition. On October 23, 2025, Carpenter Technology Corporation held its first quarter fiscal year 2026 earnings call, broadcast live by webcast. A copy of the slides presented during the call are furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

Results of Operations and Financial Condition. On October 23, 2025, Carpenter Technology Corporation issued a press release announcing fiscal 2026 first quarter results for the period ended September 30, 2025. A copy of the press release is furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

Chairman of the Board — I. Martin Inglis: The Chairman is retiring after 22 years with an immediate internal successor (the CEO) appointed, representing an orderly succession rather than a sudden loss of leadership.

Results of Operations and Financial Condition. On July 31, 2025, Carpenter Technology Corporation issued a press release announcing fiscal 2025 fourth quarter results for the period ended June 30, 2025. A copy of the press release is furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

Results of Operations and Financial Condition. On July 31, 2025, Carpenter Technology Corporation held its fourth quarter fiscal year 2025 earnings call, broadcast live by webcast. A copy of the slides presented during the call are furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

Results of Operations and Financial Condition. On April 24, 2025, Carpenter Technology Corporation issued a press release announcing fiscal 2025 third quarter results for the period ended March 31, 2025. A copy of the press release is furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

Results of Operations and Financial Condition. On April 24, 2025, Carpenter Technology Corporation held its third quarter fiscal year 2025 earnings call, broadcast live by webcast. A copy of the slides presented during the call are furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

Director — Julie A. Beck: The filing discloses the appointment of a new independent director to the Board, which is a routine governance event and not a departure of a senior executive.

Results of Operations and Financial Condition. On January 30, 2025, Carpenter Technology Corporation held its second quarter fiscal year 2025 earnings call, broadcast live by webcast. A copy of the slides presented during the call are furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

Results of Operations and Financial Condition. On January 30, 2025, Carpenter Technology Corporation issued a press release announcing fiscal 2025 second quarter results for the period ended December 31, 2024. A copy of the press release is furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.

Results of Operations and Financial Condition. On October 24, 2024, Carpenter Technology Corporation held its first quarter fiscal year 2025 earnings call, broadcast live by webcast. A copy of the slides presented during the call are furnished as Exhibit 99.1 to this Form 8-K and shall not be deemed to be “filed” for any purpose.