As of January 2026 Builders FirstSource has a market cap of C$19.45 Billion. This makes Builders FirstSource the world's 1544th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Jan 13th, 2026 the market cap of Builders FirstSource was reported to be: