Third Quarter 2025 Highlights Exhibit 99.1 Belden Reports Record Third Quarter 2025 Results St. Louis, Missouri – October 30, 2025 - Belden Inc. (NYSE: BDC) ("Belden" or the "Company"), a leading global supplier of complete connection solutions, today reported fiscal third quarter results for the period ended September 28, 2025. Assuming the continuation of current market conditions, the table below provides guidance for the fourth quarter of 2025. | Fourth Quarter 2025: | | | --- | --- | | | Guidance | | R ...