Builders FirstSource (BLDR) Earnings: Q3 2026 Results

The quarter ended September 30, 2026 and Builders FirstSource published the results on October 29, 2026. Revenue and diluted EPS are shown against Q3 2025, the same quarter a year earlier, which takes seasonal swings out of the comparison. Builders FirstSource reports EPS two ways: GAAP, under the accounting rules every US filer follows, and Adjusted diluted, which leaves out items the company considers outside its operating results. The release reconciles the two, and when they diverge, the reconciliation says why.

• Builders FirstSource's income statement is in thousands; this page uses the release's product category table in millions ($3,854.0 million of net sales, against $3,941.2 million).

Source: Builders FirstSource Q3 2026 results, October 29, 2026. Also in the Form 10-Q for the quarter ended September 30, 2026. Figures as reported; checked against the release on November 10, 2026.

How Builders FirstSource splits revenue in its own release, under its own labels, for Q3 2026 against Q3 2025. Indented lines are parts of the line above them.

• Builders FirstSource's Value-added products revenue was $1.8 billion in Q3 2026, down 5% from $1.9 billion in Q3 2025, 46% of total revenue.
• Builders FirstSource's Specialty building products & services revenue was $1.0 billion in Q3 2026, down 3% from $1.1 billion in Q3 2025, 27% of total revenue.
• Builders FirstSource's Lumber & lumber sheet goods revenue was $1.0 billion in Q3 2026, up 5% from $990 million in Q3 2025, 27% of total revenue.

Segment lines are the figures writers cite most often, because they show where the growth in a quarter came from. Companies redraw their segments from time to time and restate the prior year to match, so a year-ago figure here can differ from the one printed a year ago. When that has happened, the note above says so.

From the earnings release

In its Q3 2026 release, Builders FirstSource said:

“Net Sales to be in a range of $14.2 billion to $14.6 billion.”

“Gross Profit margin to be in a range of 27.5% to 28.5%.”

“Adjusted EBITDA to be in a range of $1.075 billion to $1.125 billion.”

“Free cash flow of approximately $400 million to $450 million, assuming average commodity prices in the range of $390 to $410 per thousand board foot (mbf).”

Source: Builders FirstSource Q3 2026 release, Oct 29, 2026.

This is the company's own guidance as of Oct 29, 2026, quoted as given. Walnut does not make forecasts of its own. Analyst estimates for the coming quarters are on the BLDR forecast page.

Revenue and diluted EPS for the last 5 quarters. Each date links to that quarter's release.

Net sales and GAAP diluted EPS, each as first reported in that quarter's earnings release. Net sales are rounded to the nearest $0.1 million where the release prints them in thousands.

We do not hold a confirmed date for Builders FirstSource's next report. Companies post the date on their investor relations site a few weeks ahead, usually with the time of the conference call.

Each quarter keeps its own page with the figures as reported, so a link to one stays pointed at the same numbers after the next report.

• Q3 2026 (this page), reported Oct 29, 2026

Builders FirstSource sells building materials to professional homebuilders and contractors and groups them into four product categories. In Q3 2026 value-added products, its manufactured products and windows, doors & millwork, brought in $1,783.2 million, or 46.2% of net sales of $3,854.0 million. Lumber & lumber sheet goods added $1,036.5 million and specialty building products & services $1,034.3 million. (Builders FirstSource Q3 2026 release, Oct 29, 2026)

Builders FirstSource's net sales fell 2.2%, which it attributed to a lower housing starts environment. Core organic net sales declined 3.9% and commodity deflation took off 0.1%, partly offset by 1.8% of growth from acquisitions. By end market, core organic Single Family sales fell 6.2%, Multi-Family rose 2.0% and Repair and Remodel/Other rose 0.3%; weighted by size, Single Family alone lowered net sales by 4.3%. (Builders FirstSource Q3 2026 release, Oct 29, 2026)

Lumber & lumber sheet goods was the only category to grow, up 4.7%, which the 10-Q attributes to higher sales volumes from certain sales initiatives. Windows, doors & millwork fell 7.3% and manufactured products 2.8%, on decreased single-family activity. Census Bureau data cited in the 10-Q put U.S. single-family starts at 232 thousand in Q3 2026, down 1.6%. (Builders FirstSource Q3 2026 release, Oct 29, 2026; Builders FirstSource Form 10-Q, Q3 2026, Oct 29, 2026)

Builders FirstSource's customers are mostly large production homebuilders. In 2025 its top 10 customers accounted for 14% of net sales and its largest customer for 4%, and its 10-K names D.R. Horton, Lennar, Pulte Homes, Toll Brothers and Meritage Homes among its largest customers. (Builders FirstSource Form 10-K, 2025, Feb 17, 2026)

Builders FirstSource's GAAP diluted EPS was $0.56 in Q3 2026 and its adjusted EPS was $1.51, against $1.10 and $2.00 a year earlier. Adjusted net income of $162.2 million adds back $70.6 million of amortization, $38.4 million of technology implementation expense, $15.6 million of stock compensation and $8.4 million of other management-identified adjustments to net income of $60.4 million, less a $32.1 million tax effect. (Builders FirstSource Q3 2026 release, Oct 29, 2026)

Taxes were a benefit in the quarter. Income before income taxes was $26.8 million and Builders FirstSource recorded an income tax benefit of $33.6 million, a GAAP effective tax rate of (125.0)%, which it attributed mainly to losses before income taxes at certain subsidiaries. A year earlier the rate was 23.3%. (Builders FirstSource Q3 2026 release, Oct 29, 2026)

Builders FirstSource's diluted share count fell to 107.6 million from 110.9 million. It repurchased 3.3 million shares for $302.9 million in the first quarter of 2026 and none in the second or third, and has $500 million remaining under its authorization. Since August 2021 it has repurchased 102.6 million shares, or 49.7% of its total shares outstanding, for a total cost of $8.3 billion. (Builders FirstSource Q3 2026 release, Oct 29, 2026; Builders FirstSource Form 10-Q, Q3 2026, Oct 29, 2026)

Diluted EPS divides net income by the weighted average number of shares outstanding in the quarter, plus the shares that options and other equity awards could add. Buybacks shrink that count and lift EPS for the same profit; share issuance and stock awards enlarge it.

Builders FirstSource gives a full-year outlook in its release and narrowed it in Q3 2026 while keeping the midpoints for net sales and Adjusted EBITDA. For 2026 it expects net sales of $14.2 billion to $14.6 billion, a gross profit margin of 27.5% to 28.5%, Adjusted EBITDA of $1.075 billion to $1.125 billion and free cash flow of approximately $400 million to $450 million, assuming average commodity prices of $390 to $410 per thousand board foot. (Builders FirstSource Q3 2026 release, Oct 29, 2026)

The outlook assumes Single Family starts in its geographies down mid- to high-single digits, Multi-Family starts down mid-single digits and Repair & Remodel activity down 1%, with acquisitions adding 1.5% to 2% of net sales growth. Builders FirstSource said it will host an Investor Day at the NYSE on November 17, 2026. (Builders FirstSource Q3 2026 release, Oct 29, 2026)

A consensus figure is the average of the models published by the analysts who cover Builders FirstSource, collected by a data provider and revised up to the day of the report. A quarter that lands above it says how expectations were set as much as how the business did, and the share price on the day also reflects the guidance and the lines no consensus covers.

The consensus figures on this page are Yahoo Finance's, as pulled on the date shown. Each comes with the number of analysts behind it; the smaller that number, the more one revised estimate can move the average.

The figures below are the ones Builders FirstSource's own release and filings put weight on for Q3 2026, with the latest reported value for each.

What the quarter means for a holding is a separate question from what it reported. The case for and against owning BLDR is on is BLDR a buy or a sell?, what analysts expect next is on the BLDR forecast, and what the company does is on the Builders FirstSource (BLDR) stock page.

Every number on this page can be traced to a document Builders FirstSource published. Checking one takes a couple of minutes, and it is worth doing before you quote a figure anywhere.

• The results release is the document linked in the source line above. Companies publish it on their investor relations site at the moment results go out, and it carries the headline tables: revenue, operating income, net income and EPS for the quarter and the year-ago quarter.
• The same release is filed with the SEC as Exhibit 99.1 to a Form 8-K under Item 2.02, usually on the day of the report. The SEC copy does not change after the fact, which makes it the safer thing to link when you cite a number.
• The quarterly report (Form 10-Q) follows within a few weeks and carries the full financial statements, the segment note and management's discussion of what changed. The fourth quarter is covered by the annual report (Form 10-K) instead.
• Restated comparisons are flagged in the notes on this page. When a company redraws its segments or changes how it adjusts EPS, it restates the year-ago column, so the year-ago figure in a new release can differ from the one printed a year ago. This page always uses the comparison in the newer release, because that is the like-for-like one.

A walk-through of every line in a release, with what each one tells you, is in how to read an earnings report.