Worthington Steel, Inc., (NYSE: WS) announced today that its tailor welded blanking joint venture, TWB Company, LLC (TWB), received two supplier awards from Subaru of Indiana Automotive (SIA): the Excellent Performance Award and the Commodity Leader Award. TWB was one of only eight suppliers recognized with multiple awards among nearly 260 companies supporting SIA's operations.

"These awards reflect the commitment our teams bring to serving our customers every day," said Geoff Gilmore, president and CEO of Worthington Steel. "Congratulations to the TWB team on this recognition and on continuing to strengthen an important customer relationship through their dedication and performance."

The Excellent Performance Award recognizes achievement of SIA's targets for safety, quality, cost and delivery, while the Commodity Leader Award honors the top-performing supplier within its commodity category. Subaru recognized 24 suppliers for exceptional performance during the past year across three award categories.

"This recognition belongs to our employees," said Brad Ranly, president of TWB Company. "Their focus on our customers and the pride they take in their work are what make achievements like this possible. We're proud of our partnership with Subaru and appreciate the trust they've placed in our team."

About TWB Company

TWB is North America’s market leader for tailor welded products with 11 locations in Kentucky, Michigan, Ohio, Tennessee, Ontario and Mexico. Formed in 1992, TWB Company is a joint venture between Worthington Steel and BAOSteel. Worthington Steel holds majority ownership and serves as managing partner. More information about TWB can be found at www.TWBCompany.com.

About Worthington Steel

Worthington Steel (NYSE: WS) is one of North America's leading value-added metals processing and manufacturing companies. The company partners with customers to deliver specialized, highly technical solutions across carbon flat-rolled steel, aluminum, stainless steel, long products, heavy plate and electrical steel, to solve complex challenges across a broad range of industries.

Worthington Steel employs approximately 12,000 people and operates approximately 150 facilities, primarily in North America, with additional operations in Europe and Asia. The company combines extensive processing expertise with advanced manufacturing technologies, including galvanizing, pickling, configured blanking, specialty cold reduction, electrical steel laminations, fabrication and precision processing.

Guided by its people-first Philosophy and a commitment to safety, innovation and continuous improvement, Worthington Steel creates long-term value by delivering trusted solutions for customers, opportunities for employees, returns for shareholders and strength for the communities where it operates.

Important Information: On Sept. 8, 2026, Worthington Steel and Kloeckner & Co entered into a Domination and Profit and Loss Transfer Agreement (DPLTA), which remains subject to approval by Kloeckner shareholders and the registration with the competent commercial register before becoming effective. Until the DPLTA becomes effective, Kloeckner continues to operate independently. The employee and facility counts above reflect the expected combined organization following the DPLTA becoming effective.

Safe Harbor Statements

Worthington Steel wishes to take advantage of the Safe Harbor provisions included in the Private Securities Litigation Reform Act of 1995 (the “Act"). Statements by Worthington Steel which are not historical information constitute "forward looking statements" within the meaning of the Act. All forward-looking statements are subject to risks and uncertainties which could cause actual results to differ from those projected. Factors that could cause actual results to differ materially include risks, uncertainties and impacts described from time to time in Worthington Steel’s filings with the Securities and Exchange Commission.

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