What Core Molding Technologies, Inc. told the SEC could break it.

Core Molding's revenue is highly concentrated — five customers (International, BRP, PACCAR, Yamaha, Volvo) made up ~65% of 2025 sales and 68% of accounts receivable — so losing a significant portion of any of these would materially harm results.

“Sales to five customers constituted approximately 65% of our 2025 total sales. No other customer accounted for more than 10% of our total sales for this period.”

Core Molding buys resins, fiberglass and metal components whose prices and availability track crude oil, natural gas and other feedstocks (and tariffs); with contractual limits on passing through input-cost changes, rising commodity prices compress operating margins.

“raw material purchases in which the Company purchases various resins, fiberglass, and metal components for use in production. The prices and availability of these materials are affected by the prices of crude oil, natural gas and other feedstocks, tariffs, as well as processing capacity versus demand.”

Core Molding manufactures in Matamoros and Monterrey, Mexico and Cobourg, Canada and sources raw materials abroad; new or increased U.S. tariffs (especially on Mexico) could reduce product demand, cause customer losses, and harm its competitive position.

“the potential imposition of tariffs, especially in Mexico, may lead to further challenges that may negatively affect our business if there is a resulting reduction in demand for our products, result in the loss of customers and harm our competitive position in key markets.”