AAON, Inc. (AAON) Q1 2026 earnings review
Hypergrowth in Data Centers Trades Margins for Volume
AAON delivered a massive top-line beat, breaking out of 2025's operational challenges with sales surging 54.3% YoY to a record $496.9 million. Earnings per share followed suit, rising 37.1% to $0.48. However, scaling production at this speed came at a cost. Gross margins compressed from 26.8% to 25.1% as the company leaned on temporary outsourcing and absorbed costs from new facilities. Management fully embraced this trade-off in their updated FY26 guidance: they more than doubled their revenue growth target to 40%-45%, while cutting their gross margin outlook to 27%-28%. The market reaction will hinge on investors' willingness to accept near-term margin pain for immense, data-center-driven market share gains.
🐂 Bull Case
Total backlog more than doubled YoY to $2.13 billion. The BASX segment alone holds $1.62 billion, giving the company incredible forward visibility and de-risking the massive 40%+ revenue growth guidance for the year.
While gross margins dipped, selling, general, and administrative (SG&A) expenses fell 220 basis points to 13.7% of sales. The sheer volume of revenue is easily covering back-office costs, keeping net income growth highly robust.
🐻 Bear Case
Gross margin continues to face pressure. The cut to FY26 margin guidance (from 29-31% down to 27-28%) proves that the costs of rapid capacity expansion and outsourcing will be a prolonged headwind.
AAON-branded backlog declined 3.1% sequentially. Management explicitly noted a 'softer market environment,' signaling that outside of the booming AI data center niche, the traditional commercial HVAC market remains sluggish.
⚖️ Verdict: 🟢
Bullish. While margin compression is never ideal, it is an acceptable consequence of capturing a once-in-a-generation demand spike in data centers. Accelerating revenue growth at this scale fundamentally shifts the company's earnings power.
Key Themes
BASX Segment Fueling Hypergrowth
Demand for custom-engineered BASX liquid and air cooling solutions for data centers is Accelerating rapidly. Segment sales grew 104.5% YoY to $135.4 million, and the backlog grew an astonishing 160% to $1.62 billion. This segment is single-handedly transforming the company's growth profile.
Oklahoma Production Turnaround
After severe supply chain and ERP rollout disruptions throughout 2025, the core AAON Oklahoma segment is Reversing its prior weakness. Sales jumped 50.7% YoY to $244.0 million. This reflects both normalized throughput and an easy comparison against last year's trough.
Margin Contradiction: Volume Up, Profitability Down
The margin trend is Decelerating. Despite 54.3% revenue growth, consolidated gross margin fell 170 basis points YoY to 25.1%. This directly contradicts the positive narrative that higher volume inherently drives manufacturing leverage. Management blamed temporary outsourcing and tariff costs, but the guidance cut suggests this pressure will linger.
Lagging Segment: AAON Coil Products
The AAON Coil Products segment grew 25.1% YoY to $117.6 million. While seemingly healthy, this is significantly below the company average of 54.3%. More concerning, the segment's gross margin fell steeply to 24.1% from 31.8% a year ago, diluting overall corporate profitability.
Commercial HVAC Macro Weakness
Outside of data centers, the broader commercial construction market remains a headwind. Management cited a 'softer market environment' for the core AAON brand. The sequential decline in AAON-branded backlog (-3.1%) indicates that traditional rooftop unit demand is Stable at best, and requires close monitoring.
Capacity Expansion Outpacing Efficiency
The company is aggressively bringing new capacity online, notably the Memphis facility. While this enables backlog conversion, the 'unabsorbed fixed costs' (paying for factory space before it is running at full capacity) created a $9.8 million margin drag in the Oklahoma segment alone this quarter. Management expects these inefficiencies to unwind as utilization improves.
Other KPIs
Trend is Reversing positively. Cash flow rebounded to $34.0 million after burning through $9.2 million in the same quarter last year. This marks the best cash generation since Q3 2024, driven by higher earnings and better working capital efficiency, providing crucial liquidity for ongoing capacity investments.
Stable YoY, but down sequentially from 27.1% in 25Q4. Despite triple-digit sales growth, the segment is absorbing immense startup costs and incremental resources to fuel future share gains, keeping margins capped in the near term.
Guidance
Accelerating dramatically. The company drastically raised its prior guidance of 18%-20%. This implies sustained quarter-over-quarter momentum, driven entirely by the need to execute on the massive $1.6B data center backlog and the completion of new manufacturing lines.
Decelerating. Management lowered the target from a prior range of 29%-31%. This explicitly acknowledges that the aggressive 'temporary outsourcing' and new facility ramp-up costs required to achieve 40%+ revenue growth will dilute profitability for the entire fiscal year.
Accelerating improvement. Lowered from the previous guidance of '~16%'. This demonstrates excellent operating leverage on back-office and administrative expenses. Sales are growing much faster than the corporate headcount required to support them.
Key Questions
Outsourcing Timeline and Margin Inflection
You cited 'temporary outsourcing' as a drag on Q1 gross margins. Exactly when do you expect internal capacity to fully absorb this volume, and at what quarter should we see gross margins inflect back toward the 29-30% range?
BASX Customer Concentration
With the BASX backlog soaring past $1.6 billion, how much of this growth is concentrated within a few hyperscale customers versus a broad base of co-location and enterprise buyers?
Core AAON Pricing Power
Given the softer commercial end-market and the sequential decline in AAON-branded backlog, are you having to concede pricing to win orders, or are the margin issues in the core business strictly related to factory absorption?