Key Takeaways Builders FirstSource missed Q4 earnings and sales estimates as it faced housing and pricing headwinds.Builders FirstSource's margins fell due to lower operating leverage and commodity deflation.Builders FirstSource guides cautious 2026 as it targets productivity savings and steady housing starts.Builders FirstSource, Inc. (BLDR) delivered tepid fourth-quarter 2025 results, with adjusted earnings and net sales missing the Zacks Consensus Estimate and declining on a year-over-year basis.Shares o ...