卡朋特科技 2025年度报告

FORM11-K ANNUAL REPORTPursuant to Section15(d)of theSecurities Exchange Act of 1934 For the year ended December 31, 2025 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) 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 Table of Contents 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 assets 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 independent 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 material 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 made 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 and /s/ Schneider Downs & Co., Inc. We have served as the Plan's auditor since 2024. Pittsburgh, PennsylvaniaJune 24, 2026 Carpenter Technology 401(k) Retirement PlanStatement of Changes in Net Assets Available for Benefits Carpenter Technology 401(k) Retirement PlanNotes to Financial Statements 1.Description of the Plan The following description of the Carpenter Technology 401(k) Retirement Plan (the "Plan") providesgeneral information.A more complete description of the Plan's provisions can be found in the plandocument, which is available to participants upon request from Carpenter Technology Corporation (the GeneralThe Plan is a profit-sharing and stock bonus plan which covers substantially all domestic non-union employees of the Company, as well as a certain population of union employees of the Company. Contributions Each year, participants may contribute up to 100% of annual compensation on a pre-tax or after-taxbasis, as defined by the plan document.Participants who have attained age 50 before the end of the planyear are eligible to make catch-up contributions, which are additional contributions.Participants mayalsocontribute amounts representing rollover distributions from other qualified benefit plans.Participant contributions to the Plan are recorded in the period that payroll deductions are made from theparticipants.The Plan includes an auto-enrollment provision whereby all new eligible employees areautomatically enrolled in the Plan unless they affirmatively elect not to participate in the Plan.Automatically enrolled participants have their deferral rate set at 4% of eligible com