Direct Answer
Builders FirstSource reports revenue across 4 product and service lines in its fiscal 2025 Form 10-K. Specialty Building Products and Services is the largest, with $4.1 billion of revenue (27% of the total), followed by Lumber and Lumber Sheet Goods at $3.9 billion (26%).
How Does Builders FirstSource Make Money?
No single line supplies a majority of revenue: the largest, Specialty Building Products and Services, is 27%, which spreads Builders FirstSource's exposure across several demand drivers. Between fiscal 2024 and 2025, Specialty Building Products and Services grew fastest (+4.1%) and Manufactured Products slowest (-14.4%), so the revenue mix tilts toward Specialty Building Products and Services while that gap lasts.
| Product or service | FY2025 revenue | FY2024 revenue | Share of revenue | Change |
|---|---|---|---|---|
| Specialty Building Products and Services | $4.1 billion | $3.9 billion | 26.8% | 4.1% |
| Lumber and Lumber Sheet Goods | $3.9 billion | $4.3 billion | 25.5% | -9.2% |
| Windows Doors and Millwork | $3.8 billion | $4.2 billion | 25.3% | -9.5% |
| Manufactured Products | $3.4 billion | $4.0 billion | 22.5% | -14.4% |
What the Segment Figures Do Not Show
The rows above add up to 100% of Builders FirstSource's reported revenue for fiscal 2025; the difference is intersegment eliminations, corporate revenue or items the company reports outside its segments. Segment definitions are management's choice and change when a company reorganizes, in which case it restates prior years in the next filing, so a multi-year comparison should use the figures from a single filing. Revenue shows where sales come from, not where profit or cash is earned: a small segment can carry most of the margin.
Where These Numbers Come From
Every figure on this page is a value Builders FirstSource reported in the segment note and revenue disclosures of its Form 10-K filed February 17, 2026 (accession 0001193125-26-054643), read from the SEC's Financial Statement Data Sets. The prior-year column is the comparative figure from that same filing, so it reflects any restatement for a change in segments. Category names are the company's own XBRL labels, lightly reformatted for reading.
Rows that only total other rows (for example a "Products" line beside the individual products) are left out so nothing is counted twice. This page is educational and describes reported history for fiscal 2025; it is not a forecast or a recommendation.
Frequently Asked Questions
What are Builders FirstSource's main products and services?
In its fiscal 2025 Form 10-K, Builders FirstSource reports revenue for Specialty Building Products and Services, Lumber and Lumber Sheet Goods, Windows Doors and Millwork and Manufactured Products.
Which part of Builders FirstSource brings in the most revenue?
Specialty Building Products and Services, with $4.1 billion of revenue in fiscal 2025, or 27% of the total.
Where does Builders FirstSource report its segment results?
In the segment note to the financial statements in its Form 10-K, most recently filed February 17, 2026, alongside management's discussion of each segment's results.