WESCO International (WCC) Earnings: Q3 2026 Results

The quarter ended September 30, 2026 and Wesco International 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. Wesco International reports EPS two ways: GAAP, under the accounting rules every US filer follows, and adjusted, which leaves out items the company considers outside its operating results. The release reconciles the two, and when they diverge, the reconciliation says why.

• Wesco's adjusted EPS excludes digital transformation costs ($24.8 million in Q3 2026), a gain from the partial settlement of the EECOL Canada pension plan, and the related tax effects.
• Organic sales growth, which Wesco reports, removes the Newark Engineering Group acquisition and foreign exchange. It was 16.6% in Q3 2026, the same as reported growth.

Source: Wesco 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 Wesco International 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.

• Wesco International's Electrical & Electronic Solutions (EES) revenue was $2.8 billion in Q3 2026, up 17% from $2.4 billion in Q3 2025, 38% of total revenue.
• Wesco International's Communications & Security Solutions (CSS) revenue was $2.9 billion in Q3 2026, up 22% from $2.4 billion in Q3 2025, 41% of total revenue.
• Wesco International's Utility & Broadband Solutions (UBS) revenue was $1.5 billion in Q3 2026, up 6% from $1.4 billion in Q3 2025, 21% 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

Wesco's October outlook, in the slides filed with its release: reported sales of $26.8 to $27.0 billion (organic growth of 13% to 14%), an adjusted EBITDA margin of about 7.2%, adjusted diluted EPS of $18.00 to $18.50 (raised from $16.00 to $17.50 in July) and free cash flow of $300 to $600 million.

In its Q3 2026 release, Wesco International said:

“Again, increasing full-year sales, adjusted EBITDA and adjusted EPS expectations”

“Pricing is expected to contribute approximately 3 points to full-year sales growth”

“Data Center expected to be up 40%+ (vs. up 30%+ prior)”

“Very good start to Q4 with October preliminary sales per workday up high teens”

Source: Wesco Q3 2026 earnings slides (Exhibit 99.2), 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 WCC forecast page.

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

GAAP net sales and diluted EPS, each as first reported in that quarter's release.

We do not hold a confirmed date for Wesco International'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

Wesco International reported record third-quarter net sales of $7,226.4 million in Q3 2026, up 16.6% from $6,199.1 million, with organic growth also 16.6%. Communications & Security Solutions (CSS) brought in $2,933.5 million, Electrical & Electronic Solutions (EES) $2,772.4 million and Utility & Broadband Solutions (UBS) $1,520.5 million. Sales rose 8.4% from the second quarter. (Wesco Q3 2026 release, Oct 29, 2026)

Wesco is a business-to-business distributor of electrical, communications, security, utility and broadband products and supply chain services, with about 21,000 employees, more than 35,000 suppliers and nearly 130,000 customers. It sells to commercial and industrial businesses, technology companies, telecommunications providers and utilities from more than 700 sites in approximately 50 countries. (Wesco Form 10-Q, Q3 2026, Oct 29, 2026; Wesco Q3 2026 release, Oct 29, 2026)

Data centers drove the fastest growth. Total company data center sales were $1.8 billion, up about 55% from $1.2 billion, and Wesco said non-data center sales rose 7%. By unit, organic sales grew 21.4% in CSS, 17.8% in EES and 6.6% in UBS. Wesco attributes the increase to volume growth in all three segments and a favorable impact from price. (Wesco Q3 2026 release, Oct 29, 2026; Wesco Q3 2026 earnings slides, Oct 29, 2026)

Wesco's backlog reached a record, up approximately 80% from the end of Q3 2025, with record levels in each of CSS, EES and UBS. Over the first nine months, the 10-Q attributes CSS volume growth of approximately 19% primarily to the data center solutions business and EES volume growth of approximately 7% primarily to construction and OEM. (Wesco Q3 2026 release, Oct 29, 2026; Wesco Form 10-Q, Q3 2026, Oct 29, 2026)

Wesco International reported diluted EPS of $5.43 in Q3 2026, up 43.3% from $3.79, and adjusted diluted EPS of $5.77, up 47.2% from $3.92. The gap is mainly digital transformation costs of $24.8 million, which adjusted results exclude, along with cloud computing amortization and stock-based compensation in adjusted EBITDA. (Wesco Q3 2026 release, Oct 29, 2026)

Gross margin was 21.7%, against 21.3%, and adjusted EBITDA rose 32.7% to $561.5 million, a margin of 7.8%, against 6.8%. Operating profit rose 30.5% to $450.8 million, an operating margin of 6.2%. By unit, adjusted EBITDA margin was 10.7% in CSS, 10.4% in UBS and 9.3% in EES. (Wesco Q3 2026 release, Oct 29, 2026)

Diluted shares were 49.3 million, against 49.5 million. The effective tax rate rose to 24.4% from 23.5%, which Wesco attributes largely to higher non-deductible compensation expense, and the adjusted provision for income taxes was $32.8 million higher. Interest expense, net was $93.6 million, against $99.0 million. (Wesco Q3 2026 release, 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.

Wesco International raised its 2026 outlook again in October. It now expects reported sales of $26.8 to $27.0 billion, organic sales growth of 13% to 14%, an adjusted EBITDA margin of about 7.2%, adjusted diluted EPS of $18.00 to $18.50 (July: $16.00 to $17.50) and free cash flow of $300 to $600 million. (Wesco Q3 2026 earnings slides, Oct 29, 2026)

For the fourth quarter, Wesco expects reported sales up low to mid-teens and adjusted EBITDA margin up about 50 basis points, and said October preliminary sales per workday were up high teens. It expects data center sales to be up 40%+ for the year, against 30%+ previously. (Wesco Q3 2026 earnings slides, Oct 29, 2026)

A consensus figure is the average of the models published by the analysts who cover Wesco International, 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 Wesco International'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 WCC is on is WCC a buy or a sell?, what analysts expect next is on the WCC forecast, and what the company does is on the WESCO International (WCC) stock page.

Every number on this page can be traced to a document Wesco International 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.