IRVING, Texas--(BUSINESS WIRE)--Builders FirstSource, Inc. (NYSE: BLDR) today reported its results for the third quarter ended September 30, 2025. Third Quarter 2025 Highlights All Year-Over-Year Comparisons Unless Otherwise Noted: Net sales were $3.9 billion, a 6.9% decrease, driven by lower core organic net sales and commodity deflation, partially offset by growth from acquisitions. Gross profit margin decreased 240 basis points to 30.4%, primarily driven by a below-normal starts environment.