Core Molding Technologies, Inc.

Item 5.02 Appointment of Certain Officers Appointment of Chief Operating Officer On September 28, 2026, Core Molding Technologies, Inc. (the “Company”) announced the promotion of Michael J. Gayford to Chief Operating Officer (“COO”), effective immediately. In his expanded role, Mr. Gayford will assume operational responsibility for the Company’s North American operations and continue to drive operational excellence, overseeing program management, advancing research and development initiatives, and executing strategic programs designed to accelerate growth and improve operational performance. Mr. Gayford joined the Company in 2023 and has more than 25 years of manufacturing, engineering, and operational leadership experience, including 17 years in composite manufacturing. Since March 2023, Mr. Gayford was promoted to Executive Vice President of Operations in 2025, where he oversaw multi-site manufacturing operations across the United States and Canada, and led the company’s Advanced Manufacturing Engineering and Research and Development Organizations. Mr. Gayford earned his Bachelor of Science in Mechanical Engineering Technology from Alfred State College. The Company is not aware of any family relationships among Mr. Gayford or any arrangements or understandings pursuant to which those persons have been, or are to be, selected as a director or executive office of the Company, other than arrangements or understandings with directors or executive officers acting solely in his capacity as executive officer.