☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF1934 For the quarterly period ended March 31, 2026OR ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 for the transition period from ____________ toCommission File Number 001-12505CORE MOLDING TECHNOLOGIES, INC. Indicate by check mark whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d) of the Securities Exchange Act of 1934during the preceding 12months (or for such shorter period that the registrant was required to file such reports), and (2)has been subject to such filingrequirements for the past 90days. Yes☒No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule405 ofRegulationS-T (§232.405 of this chapter) during the preceding 12months (or for such shorter period that the registrant was required to submit suchfiles). Yes☒No Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. Seedefinition of “accelerated filer,” “large accelerated filer,” and “smaller reporting company,” in Rule12b-2 of the Exchange Act. Large accelerated filerAccelerated Filer☒Non-accelerated FilerSmaller reporting company☒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 orrevised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. Indicate by check mark whether the registrant is a shell company as defined in Rule12b-2 of the Exchange Act. Yes☐No☒ Securities registered pursuant to Section 12(b) of the Act: As of May6, 2026, the latest practicable date, 8,899,729 shares of the registrant’s common stock were issued, which includes 336,430 shares ofunvested restricted common stock. Table of Contents Table of Contents Part I — Financial InformationItem1. Financial Statements (Unaudited)Consolidated Statements of Operations3Consolidated Statements of Comprehensive Income4Consolidated Balance Sheets5Consolidated Statement of Stockholders’ Equity6Consolidated Statements of Cash Flows7Notes to Consolidated Financial Statements8Item2. Management’s Discussion and Analysis of Financial Condition and Results of Operations23Item3. Quantitative and Qualitative Disclosures About Market Risk28Item4. Controls and Procedures28Part II — Other InformationItem1. Legal Proceedings30Item1A. Risk Factors30Item2. Unregistered Sales of Equity Securities and Use of Proceeds30Item3. Defaults Upon Senior Securities30Item4. Mine Safety Disclosures30Item5. Other Information30Item6. Exhibits31Signatures32Index to Exhibits33 Core Molding Technologies, Inc. and SubsidiariesConsolidated Statements of Operations(In thousands, except for per share data)(Unaudited) Core Molding Technologies, Inc. and SubsidiariesConsolidated Statements of Comprehensive Income(In thousands)(Unaudited) Core Molding Technologies, Inc. and SubsidiariesConsolidated Balance Sheets(In thousands, except for share data) Core Molding Technologies, Inc. and SubsidiariesConsolidated Statement of Stockholders’ Equity(In thousands, except for share data)(Unaudited) Core Molding Technologies, Inc. and SubsidiariesConsolidated Statements of Cash Flows(In thousands)(Unaudited) Core Molding Technologies, Inc. and SubsidiariesNotes to Consolidated Financial Statements(Unaudited) 1. BASIS OF PRESENTATION The accompanying unaudited consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and include all ofthe information and disclosures required by accounting principles generally accepted in the United States of America for interim reporting, which areless than those required for annual reporting. In the opinion of management, the accompanying unaudited consolidated financial statements contain alladjustments (all of which are normal and recurring in nature) necessary to present fairly the financial position of Core Molding Technologies, Inc. andits subsidiaries (“Core Molding Technologies” or the “Company”) at March31, 2026, and the results of operations and cash flows for the three monthsended March31, 2026. The “Notes to Consolidated Financial Statements” contained in the Company's Annual Report on Form 10-K for the year endedDecember31, 2025, should be read in conjunction with these consolidated financial statements. Core Molding Technologies and its subsidiaries operate in the engineered materials market as one operating segment as a molder of thermoplastic andthermoset structural products. The Company produces and sells molded products for varied markets, including medium and heavy-duty trucks, powersports, building products, industrial and utilities and other commercial markets. Core Molding Technologies has its headquar