AAON, Inc. — a Tulsa, Oklahoma-based manufacturer of commercial HVAC and precision cooling equipment — surged more than 38% on Wednesday after reporting record first-quarter 2026 results that far exceeded expectations. The company posted revenue of $496.94 million, up 54.3% year-over-year, and diluted earnings per share of $0.48, up 37.1% from $0.35 in Q1 2025. Shares settled near $135.90, lifting the company’s market capitalization to approximately $11.1 billion. (StockAnalysis.com; Yahoo Finance)
The magnitude of the move — ranking among the largest single-day gains in the company’s history — reflects both the earnings beat and a growing recognition that AAON occupies a strategically valuable position in the AI data center supply chain.
The BASX Division: AAON’s AI Cooling Arm
The central driver of investor enthusiasm is AAON’s BASX Solutions segment, which designs and manufactures precision cooling systems for mission-critical environments — including hyperscale data centers and cleanrooms. Unlike off-the-shelf cooling products, BASX builds highly customized systems engineered to the specific thermal and airflow requirements of large-scale server halls.
BASX’s revenue surged 143% in the fourth quarter of 2025, a pace that carried into 2026 as AI infrastructure investment accelerated across major cloud and technology operators. (StockAnalysis.com) The unit manufactures direct expansion cooling systems, chilled-water air handlers, and packaged outdoor mechanical rooms — equipment that sits at the intersection of power density management and energy efficiency, two priorities that have risen sharply as AI accelerators generate substantially more heat per server rack than conventional compute.
As AI chips grow more powerful — and more thermally demanding — the cooling infrastructure requirement grows alongside them. AAON has invested in capacity at its Longview, Texas manufacturing facility specifically to address this demand, and management indicated on the Q1 call that bookings at BASX remained at all-time highs heading into the second quarter.
Record Backlog: Revenue Visibility Into 2027
The most forward-looking metric in AAON’s results may be its backlog. As of December 31, 2025, AAON carried a record $1.83 billion in backlog — representing 110.9% year-over-year growth. (AAON Investor Relations) Management stated in Wednesday’s press release that the backlog reached new all-time highs during Q1 2026, though the company did not disclose a specific March 31 figure in the initial release.
For context, AAON’s entire FY2025 annual revenue was $1.44 billion — meaning year-end backlog already exceeded one full year of revenues. That level of visibility is unusual for a mid-cap industrial manufacturer and gives analysts high confidence in forward revenue estimates.
Quarterly Results at a Glance
| Quarter | Revenue ($M) | Revenue YoY | EPS (Diluted) | EPS YoY |
|---|---|---|---|---|
| Q1 2025 | $322.1 | +22.9% | $0.35 | −23.9% |
| Q2 2025 | $311.6 | −0.6% | $0.19 | −69.4% |
| Q3 2025 | $384.2 | +17.4% | $0.37 | −41.3% |
| Q4 2025 | $424.2 | +42.5% | $0.39 | +30.0% |
| Q1 2026 | $496.9 | +54.3% | $0.48 | +37.1% |
Revenue Acceleration: Q1 2025 vs Q1 2026
Guidance Raised; Margins Expected to Recover
Management raised its full-year 2026 revenue growth outlook during the Q1 call, projecting 18–20% growth over FY2025’s $1.44 billion base. (StockAnalysis.com) The company also guided for margin expansion in the second half of the year as production throughput increases at its Oklahoma and Texas facilities, easing the outsourcing costs that pressured gross margins in early-to-mid 2025.
Net income for Q1 2026 came in at $39.81 million — a modest absolute figure relative to revenue, partly reflecting continued production ramp costs at BASX. Analysts expect operating leverage to improve meaningfully as manufacturing utilization rises throughout the year.
Three Segments, One Story
AAON operates through three segments:
- AAON Oklahoma — the legacy commercial HVAC business producing rooftop units and air handlers for office buildings, warehouses, and retail facilities.
- AAON Coil Products — manufactures heat exchangers and refrigerant coils, primarily supplying the two other segments as well as external OEM customers.
- BASX Solutions — the data center and precision cooling unit, designing and building custom cooling systems for hyperscale, enterprise, and government data centers.
BASX is the fastest-growing segment by a wide margin, though the AAON Oklahoma commercial HVAC business also benefits indirectly from the broader data center construction wave — data center campuses require large-scale conventional HVAC for office, administrative, and support spaces adjacent to server halls.
AAON has also been recognized by the U.S. Department of Energy’s Commercial Building HVAC Technology Challenge for its energy-efficient cooling designs, a certification that carries increasing weight with hyperscaler procurement teams focused on reducing power usage effectiveness (PUE) metrics across their portfolios. (StockAnalysis.com)
The Broader AI Infrastructure Trade
AAON’s surge fits a broader pattern that has played out across the 2025–26 earnings cycle: companies that supply the physical infrastructure for AI data centers — concrete, power, fiber, and cooling — have been consistent outperformers even as attention concentrated on chip manufacturers and cloud platforms.
Sterling Infrastructure (STRL), which provides concrete foundations and underground utilities for data centers, reported a 50% single-session gain on its own blowout Q1 2026 results last month. The parallel is instructive: neither AAON nor STRL manufactures semiconductors or runs AI models, yet both are direct beneficiaries of the capital expenditure wave behind those technologies.
Major cloud operators have committed hundreds of billions of dollars to AI infrastructure through 2027 and beyond. Each new gigawatt-scale data center campus requires precision cooling measured in thousands of tons of refrigeration — and AAON’s record backlog suggests it has secured a meaningful share of that spend.
What Investors Are Watching
Three metrics will determine whether Wednesday’s re-rating is durable:
- Backlog conversion rate — how quickly AAON can translate its record orders into recognized revenue as production capacity scales.
- BASX segment margins — the unit currently operates below the company’s blended gross margin; improvement here would be a strong positive signal.
- Full-year guidance trajectory — whether management lifts the 18–20% growth target again at Q2, given the Q1 revenue run rate implies a higher annual pace if sustained.
With a forward price-earnings ratio well above the industrial sector median, the stock prices in significant continued outperformance. Execution on margin recovery and backlog conversion will be the critical tests of that premium.
Sources
- StockAnalysis.com — AAON Quarterly Financials
- StockAnalysis.com — AAON Overview and Business Description
- AAON Investor Relations — FY2025 Results and Backlog Data
- Yahoo Finance — AAON Stock Quote, May 7, 2026
Disclosure: This article was produced with AI assistance and reviewed before publication. It is for informational purposes only and is not investment advice.