WESCO's 45% Data-Center Surge Raised Full-Year EPS to $17.50-How Much Good News Is Left?

Data centers are now a meaningful part of WESCO's growth

WESCO's second quarter was strong on the headlines, but the bigger story is the shift in business mix. Data center sales reached about $1.5 billion, up roughly 45% year over year, and now account for more than 20% of trailing 12-month sales. That is large enough to matter to the whole company, not just one corner of the portfolio.

Management also highlighted a 3% price benefit and volume gains across all three segments. The takeaway is straightforward: WESCO is selling more of the higher-demand products, and those price gains are holding up.

The rest of the quarter supported that read. Sales rose 13% reported and organic, adjusted EBITDA increased 24% to $487.2 million, adjusted EPS reached $4.57, and backlog hit a record level, up 60%. This looks less like a one-quarter pop and more like a broader demand trend.

Backlog breadth and segment margins explain why the quarter matters

Backlog is up across all three segments

A record backlog only matters if it is broad. In WESCO's case, it is. Total backlog rose 60% year over year, with CSS up about 95%, UBS about 80%, and EES about 30%. That spread suggests demand is broad-based rather than concentrated in a single product line.

When backlog grows that quickly across the operating units, it often points to multi-year customer commitments. For investors, that improves visibility into future sales and makes it less likely that this quarter was just a timing quirk.

Margin expansion is keeping pace with growth

The other encouraging signal is that profit margins are improving alongside revenue. Adjusted EBITDA margin expanded 60 basis points to 7.3%, while gross margin rose 70 basis points. Adjusted EBITDA grew 24%, nearly double the 13% revenue increase.

Segment results tell the same story. CSS posted a record 10.2% EBITDA margin on 18% organic sales growth. EES EBITDA margin expanded to 9.2% on 11% sales growth, and UBS returned to a 10.0% EBITDA margin despite competitive pressure in public power. When the fastest-growing segments are also producing better margins, the mix is improving-not just the top line.

The Newark acquisition deepens the data-center story

The recent Newark Engineering acquisition expanded WESCO's data-center capabilities into engineered cooling and lifecycle services Newark Engineering Group acquisition. At the same time, UBS secured a significant multiyear grid-services award from a hyperscaler. Both moves matter because services tend to be stickier than product sales alone, giving WESCO a deeper role in customer projects.

The next test is whether guidance and cash flow hold up

The easy part was beating the quarter. The harder part is sustaining the new outlook. WESCO now points to 9% to 11% organic sales growth, 6.9% to 7.1% adjusted EBITDA margin, $16.00 to $17.50 adjusted EPS, and $300 million to $600 million in free cash flow. That cash-flow range is wide enough to suggest working-capital needs could rise with double-digit growth.

Free cash flow is the clearest proof point

Q2 already showed that backlog does not automatically translate into cash. WESCO generated $32 million of free cash flow in the quarter after producing $246 million in the first half, while reporting $487.2 million of adjusted EBITDA. That does not break the thesis, but it does mean investors should watch conversion closely.

There is also a near-term margin watch item. Management indicated SG&A increased slightly as a percentage of sales because of higher incentive compensation. One quarter of expense mix pressure is not a thesis-breaker, but persistent margin drag would weaken the rerating case.

Project mix and execution will shape Q3

Bears have a credible argument here. Management flagged a slightly lower Q3 EBITDA margin sequentially due to project mix, and data-center demand could still be slowed by construction labor or power constraints. For an distributor scaling quickly, those delays can do more than shift revenue timing; they can also stretch working capital and soften margins.

What to watch over the next few quarters

• Whether backlog continues converting into sales at the current pace
• Whether segment margins hold as data-center exposure grows
• Whether free cash flow improves as the company supports faster growth
• Whether services and engineered solutions keep deepening WESCO's customer relationships

The quarter strengthened the case that WESCO is benefiting from a real AI and infrastructure buildout. The remaining question is not whether demand is there. It is whether management can sustain the mix shift, protect margins, and turn that demand into cash.