From Cooling to Backup Power, Data Center Demand Is Showing Up in Quarterly Results

Data-center demand is driving strong results and raised outlooks among key infrastructure suppliers: Vertiv reported Q3 sales up 61% to $4.313B and lifted 2026 sales guidance by $650M; American Tower raised its 2026 property-revenue outlook midpoint by $55M; and Johnson Controls initiated fiscal 2027 organic-sales growth guidance of 11%–12%. Generac reported record Q3 sales of $1.29B and a roughly $4.5B data-center product backlog, including an Amazon supply agreement with initial deliveries expected to total $2.4B in 2027–28. U.S. data-center construction spending reached a preliminary $84.95B annualized rate in August 2026, up from $49.05B a year earlier.

Analysis

The key distinction is order quality and conversion, not simply exposure to data-center spending. VRT and JCI have the clearest near-term operating leverage if equipment orders convert into shipments; their risk is that extraordinary order growth pulls forward demand and raises the bar for subsequent guidance. JCI’s large backlog provides visibility, but backlog is not revenue until labor, components and customer sites are ready. GNRC’s Amazon agreement improves forward visibility, yet the delivery window is concentrated in 2027–28; a delay or change in Amazon’s build schedule could make today’s backlog a poor guide to near-term earnings. AMT’s CoreSite growth is a positive mix shift, but should not be extrapolated to its much larger tower business.

The second-order constraint is power availability and grid interconnection. Delayed energization can defer equipment installations and data-center leases even while customer capex plans remain intact, so supplier orders may lead recognized revenue. Over 1–3 months, monitor guidance revisions, backlog conversion and evidence of customer site delays; over 6–18 months, watch whether data-center utilization and returns justify hyperscaler capex. The contrarian risk is that supplier forecasts price a smooth buildout while project timing remains lumpy. Census construction data are preliminary, and sector forecasts do not establish company-level earnings or valuation support. No valuation data are provided, so avoid chasing post-earnings strength.

Key Decisions for Investors

• Prefer a staged long in VRT on post-earnings consolidation rather than an opening-gap chase; reassess if organic orders or sales guidance decelerate materially, or if backlog fails to convert into shipments over the next few quarters.
• Keep JCI on a 1–3 month watchlist for backlog conversion and fiscal-2027 execution. Consider adding only after confirming organic growth is translating into revenue and cash flow; a reversal in orders or weaker guidance would falsify the thesis.
• Treat GNRC as a higher-risk, longer-dated exposure: do not capitalize the Amazon agreement as immediate earnings. Track delivery timing, customer concentration and margin realization; defer adding if the 2027–28 schedule slips or capacity expansion pressures margins.
• Do not use AMT as a pure data-center proxy. Underwrite CoreSite separately from the tower portfolio, and avoid extrapolating its segment growth to consolidated results without segment-level updates.