AAON, Inc
AAON, Inc. designs and manufactures semi-custom and custom HVAC and liquid cooling equipment used in commercial buildings, industrial facilities, hyperscale data centers, and controlled-environment cleanrooms. The company operates through three manufacturing-centric segments—AAON Oklahoma, AAON Coil Products, and BASX—each serving different product needs and end markets. Its model emphasizes “mass semi-customization,” using flexible, computer-aided manufacturing to deliver configurable equipment without fully bespoke economics. AAON also supports installed equipment through controls solutions and aftermarket parts sold via retail parts stores and online channels.
Fiscal year 2025 · change from previous year
Development 2020–2025
Business
Share of revenueSemi-custom and custom HVAC systems such as rooftop units, air handlers, makeup air, ERVs, heat pumps, and packaged mechanical rooms.
Custom high-performance cooling and modular air handling solutions for hyperscale and high-density compute data centers.
Heating and cooling coils and semi-custom/custom HVAC systems, supplying both internal segments and external demand.
Controls solutions plus replacement parts sold through retail parts stores and online to support the installed base.
Products
Reported · share of revenue- AAON Products62.0 %
- BASX Products38.0 %
Source: 10-K FY2025, revenue the company reports per product line (SEC XBRL). Shares are of the lines shown and add up to 100 %.
Customers
AAON sells primarily into non-residential HVAC channels and project-driven end markets, with demand tied to new construction, retrofits, and capacity expansions. A large portion of volume flows through an extensive network of independent representatives and channel partners that support specification, bidding, and service for commercial projects. BASX’s customer set is more concentrated and program-based, serving hyperscale data center operators and their ecosystem, where order timing can shift and cancellations/re-issuances occur. The company also serves cleanroom environments in biopharmaceutical, semiconductor, medical, and agricultural applications where filtration, humidity control, and reliability are critical. AAON discloses that a small number of customers can represent 10%+ of revenue in a given year, while the remainder is spread across thousands of transactions.
Buy semi-custom rooftop units, air handlers, makeup air and related systems to specify and deliver HVAC solutions for non-residential buildings; value configurability, lead times, and lifecycle performance.
Buy BASX custom cooling and modular air handling solutions for high-density compute and AI workloads; prioritize reliability, scalability, and integration with facility designs.
Buy ventilation/air handling solutions with advanced filtration, humidity/dehumidification, and controls for biopharmaceutical, semiconductor, medical, and agricultural environments.
Purchase replacement parts and controls upgrades via retail locations and online to maintain uptime and extend the life of installed AAON equipment.
Strategy
AAON’s strategy centers on mass semi-customization—using flexible, computer-aided manufacturing to deliver configurable equipment that fits project requirements while retaining scale economics. The company is investing in capacity and capabilities to support growth in adjacent end markets, particularly data centers and cleanroom applications, while maintaining its commercial HVAC base. Operationally, management is modernizing systems and processes, including an ERP rollout at the Longview, Texas facility, to improve planning, execution, and scalability (despite near-term disruption). AAON also emphasizes engineering differentiation through its Tulsa-based innovation and testing infrastructure (NAIC) to validate performance under extreme conditions and support premium positioning. Capital expenditures remain a key lever to expand throughput and support new product and program requirements.
Process changes disrupted coil output and impacted both coil and upstream HVAC production; normalization supports margins and delivery performance.
Higher capex and added headcount aim to support future demand in data centers, cleanrooms, and broader commercial HVAC.
Data center demand can be large and program-based, offering growth but requiring execution, customization, and schedule flexibility.
Geography
AAON’s manufacturing footprint is U.S.-based, with major operations in Tulsa, Oklahoma; Memphis, Tennessee; Parkville, Missouri; Longview, Texas; and Redmond, Oregon. The company sells across all 50 U.S. states and into certain Canadian provinces, reflecting a North America-focused go-to-market model. Reported foreign sales are relatively small versus total sales (e.g., $11.3 million in Q1 2025), implying limited direct exposure to international demand cycles but some cross-border logistics and compliance needs. The distributed plant network supports different product lines (coils, commercial HVAC, and BASX custom solutions) and influences cost absorption and segment margins when volumes shift. Geographic reach matters operationally because project demand (especially data centers) can be regionally clustered and can create uneven capacity utilization across plants.
Risks
AAON’s results are exposed to construction and capex cycles in commercial buildings and data centers; weaker macro conditions can reduce project starts and retrofit activity. Customer concentration is a recurring risk, as a small number of customers can represent 10%+ of revenue and accounts receivable, increasing sensitivity to program timing and credit dynamics. The BASX data center business carries higher backlog volatility, with timing shifts, cancellations, and re-issuances that can create production inefficiencies and margin variability. Operational execution risks include ERP and new facility ramp impacts that can disrupt throughput and overhead absorption, as seen in recent periods. Like other HVAC manufacturers, AAON is also exposed to raw material price volatility (e.g., copper, steel, aluminum), supply chain disruptions, and cybersecurity threats to manufacturing and business systems.
- Customer concentration in revenue and accounts receivableImpact: HighLikelihood: Medium
A small number of customers have represented 10%+ of revenue and AR, making results sensitive to their purchasing patterns and credit exposure.
- Data center order timing shifts, cancellations, and re-issuancesImpact: High
Management notes higher cancellation/timing risk in data center backlog versus historically firm commercial HVAC orders, which can disrupt production planning.
- Cybersecurity threats to systems and operationsImpact: MediumLikelihood: Low
The company integrates cybersecurity into enterprise risk management and uses third parties for testing/forensics, indicating ongoing threat exposure.
- Public health pandemic disruptionImpact: MediumLikelihood: Low
Pandemics can impair employees, suppliers, and partners, disrupting operations and supply chains and affecting raw material pricing.
Accounting
Judgemental itemsAnnual (and interim) impairment testing is sensitive to forecasts and market assumptions; impairments can be material and non-cash.
Impact: Can create step-changes in operating income via impairment charges
Fair value depends on model-based assumptions (volatility, term, rates) and probability assessments for certain awards.
Impact: Affects SG&A and comparability across periods
Accrual/disclosure depends on management judgment and legal developments.
Impact: Can introduce discrete charges and cash outflows
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Last updated: 24/09/2026