卡朋特科技 2025年度报告

FORM11-K ANNUAL REPORTPursuant to Section15(d)of theSecurities Exchange Act of 1934 (Mark One) ANNUAL REPORT PURSUANT TO SECTION15(d)OF THE SECURITIES EXCHANGE ACTOF 1934 For the year ended December 31, 2025 or TRANSITION REPORT PURSUANT TO SECTION15(d)OF THE SECURITIES EXCHANGEACT OF 1934 For the transition period from________ to ________ Commission File Number 1-5828 Carpenter Technology 401(k) Retirement Plan(Full title of the plan) CARPENTER TECHNOLOGY CORPORATION(Name of issuer of the securities held pursuant to the plan) 1735 Market Street, 15th FloorPhiladelphia, Pennsylvania, 19103(Address of principal executive office of the issuer) Carpenter Technology 401(k) Retirement PlanTable of ContentsDecember 31, 2025 and 2024 Report of Independent Registered Public Accounting Firm Financial Statements: Statements of Net Assets Available for Benefitsas of December31, 2025 and 2024 Statement of Changes in Net Assets Available for Benefitsfor the Year Ended December31, 2025 Notes to Financial Statements5 Supplementary Information: Schedule H, Line 4(i)- Schedule of Assets (Held at End of Year)as of December31, 2025 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Audit/Finance Committee of Carpenter Technology Corporation,Plan Administrator and Plan Participants of the Carpenter Technology 401(k) Retirement Plan Opinion on the Financial StatementsWe have audited the accompanying statements of net assets available for benefits of the Carpenter Technology 401(k) Retirement Plan (Plan) as of December 31, 2025 and 2024, and the related statement of changes in netassets available for benefits for the year ended December 31, 2025, and the related notes (collectively referred toas the financial statements). In our opinion, the financial statements present fairly, in all material respects, thenet assets available for benefits of the Plan as of December 31, 2025 and 2024, and the changes in net assetsavailable for benefits for the year ended December 31, 2025, in conformity with accounting principles generallyaccepted in the United States of America. Basis for OpinionThese financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on the Plan’s financial statements based on our audits. We are a public accounting firm registered withthe Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independentwith respect to the Plan in accordance with the U.S. federal securities laws and the applicable rules andregulations of the Securities and Exchange Commission and the PCAOB. We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we planand perform the audit to obtain reasonable assurance about whether the financial statements are free of materialmisstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financialstatements, whether due to error or fraud, and performing procedures that respond to those risks. Suchprocedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financialstatements. Our audits also included evaluating the accounting principles used and significant estimates madeby management, as well as evaluating the overall presentation of the financial statements. We believe that ouraudits provide a reasonable basis for our opinion. Table of Contents Supplemental InformationThe supplemental information contained in the schedule of assets (held at end of year) as of December 31, 2025 has been subjected to audit procedures performed in conjunction with the audit of the Plan’s financialstatements. The supplemental information is the responsibility of the Plan’s management. Our audit proceduresincluded determining whether the supplemental information reconciles to the financial statements or theunderlying accounting and other records, as applicable, and performing procedures to test the completeness andaccuracy of the information presented in the supplemental information. In forming our opinion on thesupplemental information, we evaluated whether the supplemental information, including its form and content,is presented in conformity with the Department of Labor’s Rules and Regulations for Reporting and Disclosureunder the Employee Retirement Income Security Act of 1974. In our opinion, the supplemental information isfairly stated, in all material respects, in relation to the financial statements as a whole. /s/ Schneider Downs & Co., Inc. We have served as the Plan's auditor since 2024. Pittsburgh, PennsylvaniaJune 24, 2026 Carpenter Technology 401(k) Retirement PlanStatements of Net Assets Available for BenefitsDecember 31, 2025 and 2024 Dollars in thousands20252024Investments, at fair value$912,942$779,894Interest in Carpenter Technology Master Trust, at fair value62,81043,939Interest in Carpenter Technology Ma