AAON Reports BASX Backlog Surge, Lifts 2026 Guidance
AAON reported record Q1 2026 net sales of $496.9 million, up 54.3% year-over-year, driven by demand for data center cooling systems under its BASX brand, per the company's Q1 2026 earnings press release filed with the SEC. BASX-branded backlog surged 160.0% year-over-year to $1.62 billion, while total company backlog reached a record $2.13 billion, up 107.4%. Management raised 2026 guidance to 40%-45% revenue growth (from prior 18%-20%) and gross margins of 27%-28%. President and CEO Matt Tobolski stated, "Our backlog provides exceptional visibility, particularly across the BASX brand, and positions us to drive continued growth as we move through the year." Near-term gross margin fell to 25.1% from 26.8%, reflecting capacity expansion costs management described as temporary and expected to unwind.
Q1 2026 Results
AAON reported record first-quarter 2026 net sales of $496.9 million, up 54.3% year-over-year, per the company's Q1 2026 earnings press release filed as an SEC 8-K on May 7, 2026. BASX-branded sales rose 72.4% to $228.6 million, driven by sustained data center cooling demand and improved production throughput at the Memphis facility. AAON-branded sales grew 41.6% to $268.4 million. GAAP diluted EPS increased 37.1% to $0.48.
Backlog
Total company backlog reached a record $2.13 billion, up 107.4% year-over-year. BASX-branded backlog alone rose 160.0% to $1.62 billion, growing 24.4% sequentially from $1.30 billion in Q4 2025. The book-to-bill ratio exceeded 2x for the fourth consecutive quarter. CEO Matt Tobolski stated in the press release, "Our backlog provides exceptional visibility, particularly across the BASX brand, and positions us to drive continued growth as we move through the year."
Raised Guidance
AAON raised its 2026 full-year outlook to revenue growth of 40%-45%, up sharply from prior guidance of 18%-20%. Gross margin guidance was revised to 27%-28% (prior: 29%-31%), reflecting intentional capacity investments. SG&A guidance improved to 14%-15% of sales.
Margin Dynamics
Q1 2026 gross margin came in at 25.1%, down from 26.8% in Q1 2025. Management attributed the decline to unabsorbed fixed costs from new facilities, temporary outsourcing, and price-cost timing. These pressures were described as intentional and expected to unwind as utilization improves. Tobolski stated, "Increasing utilization across existing capacity is expected to support margin improvement over time as fixed costs are absorbed, equipment comes fully online, and productivity continues to improve."
Data Center Context
BASX supplies precision air-side and liquid cooling systems for data center facilities. The sustained backlog trajectory indicates continued infrastructure buildout in AI and high-density compute. A $1.62 billion BASX backlog implies multiple quarters of demand visibility for specialized cooling hardware - relevant context for data center procurement planning and lead-time estimates.
Scoring Rationale
Strong quarterly results and a record backlog at an AI data center cooling supplier are relevant context for infrastructure practitioners, but this is company-specific industrial earnings news - not a frontier AI development. The indirect AI connection (cooling for AI compute) justifies inclusion but caps significance below notable-tier.
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