AAON Q1 2026: Capacity Upgrades, Record Backlog, and a Bright Revenue Forecast

Executive snapshot

Ticker AAON (NASDAQ: AAON) reported first-quarter 2026 results that read like a well-executed upgrade: net sales of $496.9 million, up 54.3% year over year, driven by demand across both AAON and BASX brands and a ramp in production throughput enabled by capacity investments.

GAAP EPS stood at $0.48 per diluted share, up 37.1% from $0.35 in the prior-year quarter. The top-line momentum translated into a backlog that climbed to a record $2.1 billion, up 107.4% year over year.

Brand contributions were mixed but strong: BASX-branded sales rose 72.4% to $228.6 million, while AAON-branded sales rose 41.6% to $268.4 million.

The company stressed that the results reflect a favorable mix of high‑demand data-center cooling products and expanding capacity, with production throughput improving as capacity absorption proceeds.

What drove the results

Key drivers

Strong demand across data-center cooling and other end-markets, supported by a solid backlog and higher utilization of recently commissioned capacity.
Capacity investments and efficiency gains lifting production throughput, even as some fixed-cost absorption temporarily weighed on margins.
Brand mix: BASX’s contribution remains a meaningful engine of growth, reflecting continued strength in high-end, data-center related applications.

The gross margin contracted modestly to 25.1% from 26.8% in the prior-year period. Management attributed the decline to unabsorbed fixed costs tied to recent capacity investments and temporary outsourcing used to support accelerated growth. The company anticipates these effects to unwind as internal capacity scales and utilization improves.

Selling, general and administrative expenses as a percent of sales were 13.7%, signaling ongoing operating leverage as volumes rise.

Backlog and capacity expansion

Backlog dynamics

Backlog reached a record $2.1 billion, underscoring continued strength across the data-center and HVAC segments. BASX-branded backlog rose 160% year over year, while AAON-branded bookings demonstrated resilience in a softer market environment.

Capacity rollout

The results reflect investments in capacity and operational execution that are now translating into higher throughput. Management highlighted that the installed capacity is being absorbed at an accelerating pace, a key factor behind the improved volume and backlog trajectory.

Guidance and revenue forecast

The 2026 outlook now envisions revenue growth of 40%-45% and gross margins of approximately 27%-28%, supported by record backlog, expanded capacity, and improving operational execution.

Analysts’ EPS consensus heading into the print was not disclosed in the release, leaving room for interpretation about whether the reported EPS of $0.48 constitutes an earnings surprise relative to street expectations. Management framed the results as consistent with the plan to capture upside from higher volumes and utilization, rather than a one-quarter anomaly.

In other words, the revenue forecast reflects a confident trajectory, but the magnitude of a potential earnings surprise depends on whether consensus figures align with the company’s pace of backlog conversion and margin normalization.

Market implications and sector peers

AAON’s quarter reads as a demonstration that a deliberately expanded capacity base, combined with a backlog-rich order book, can sustain high top-line growth while gradual margin normalization follows. For sector peers, the message is twofold: invest in capacity where demand is durable (not just speculative backlog), and manage fixed-cost absorption to avoid permanently elevating unit costs as utilization climbs.

If data-center demand remains robust into 2026 and beyond, the HVAC players with exposed exposure to efficiency-driven retrofits and new-builds could see a similar arc: strong volume, a building backlog, and a path toward margin expansion as utilization improves. The caveats—macro volatility, supply-chain constraints, and raw-material price swings—remain the ever-present risk overlaying these structural positives.

Conclusion

AAON’s first-quarter performance showcases a company turning a growing backlog into realized revenue, with EPS expanding on higher volumes and capacity utilization. The 2026 revenue forecast implies that the engine is still warming up rather than cooling off. If the data-center cycle sustains its current tempo and the capacity investments keep translating into productive uptime, AAON—and by extension its peers—could see a sustained upgrade in both earnings trajectory and investor confidence.

In the near term, the critical watch items are the pace of backlog conversion, the trajectory of gross margin as fixed-cost absorption normalizes, and the durability of demand from the data-center ecosystem. If those align, the industry may be looking at a repeatable pattern: build capacity, harvest backlog, and push earnings higher—without letting the air get too thin in the process.