AAON Inc. Earnings Call: Growth Surges Amid Strains

Aaon Inc ((AAON)) has held its Q4 earnings call. Read on for the main highlights of the call.

AAON Inc.’s latest earnings call painted a picture of robust top-line momentum alongside pronounced short-term growing pains. Management highlighted surging sales, data center wins, and record backlogs that underpin confidence in its 2026 targets, even as margin compression, weak cash generation, and higher debt levels temper the near-term financial narrative.

Explosive Quarterly Revenue Growth

Net sales in Q4 jumped 42.5% year over year to $424.2 million, powered by strong demand across both the core AAON brand and the rapidly scaling Basics line. The company emphasized that this broad-based strength reflects its success in winning share in key end markets, even as many HVAC peers face softer volumes.

Basics Brand Momentum and Surging Backlog

Basics branded sales surged 143% in 2025 to $548 million, with Q4 Basics revenue alone up 109.1% to $106.1 million. That growth is backed by a massive Basics backlog, which rose 141% year over year to $1.3 billion and 45% sequentially, driving a book-to-bill ratio of 2.4 for the year.

AAON Brand Resilience in a Weak Industry

While industry volumes fell roughly 16% in 2025, AAON branded sales declined only 8% for the year and turned positive in Q4, rising 9.5%. Bookings for the AAON brand grew about 12% for the year, with national accounts bookings up a striking 86%, underscoring share gains in large, repeat customers.

Coil Products and Basics Margin Expansion

Segment-level performance was particularly strong at AAON Coil Products, where sales jumped 93.6% and gross margin expanded to 21.3% from 16.1%. The Basics segment also posted impressive profitability gains, with gross margin climbing to 27.1% from just 18.8% a year earlier, reflecting scale benefits and improved mix.

Record Backlog and Production Ramps into 2026

Bookings and backlog remained robust in Q4 across both Basics and AAON-branded offerings, giving the company strong visibility heading into 2026. Management reported materially higher production at Tulsa in January and February, alongside continued ramp-up at Memphis, positioning AAON for future revenue growth and margin recovery.

Memphis Hits Profitability Milestone

The Memphis facility achieved its first profitable quarter, marking a key milestone for AAON’s expanded manufacturing footprint. Management framed Memphis as a strategic capacity lever that, once fully utilized, should support higher operating margins and better service levels in high-growth markets.

EPS Growth and Healthy Incremental Margins

Diluted EPS in Q4 rose 30% year over year to $0.39, showing that earnings are growing even amid operational friction. Combined results from Tulsa and Memphis showed 31% sales growth in Q4 with incremental margins around 25%, a sign that additional volume can fall through profitably as utilization improves.

Capacity Investments and Long-Term Targets

AAON laid out 2026 guidance calling for 18%–20% sales growth, gross margins of 29%–31%, SG&A at roughly 16% of sales, and depreciation and amortization of $95–$100 million. The company has expanded its manufacturing footprint by more than 25% over the past 18 months and plans approximately $190 million of 2026 capital expenditures to support continued growth.

Innovation in Rooftop and Data Center Solutions

On the product side, AAON spotlighted new rooftop units up to 40 tons with cold-climate heat pump capability down to -20°F, targeting markets shifting away from fossil fuels. The company also highlighted advanced air and liquid cooling solutions for data centers, aiming to cement its position in high-value, mission-critical applications.

Margin Compression in Q4 Despite Growth

Despite strong sales, Q4 profitability slipped, with gross margin edging down to 25.9% from 26.1% and non-GAAP adjusted EBITDA margin falling to 15.2% from 15.8%. Management attributed the pressure largely to unabsorbed fixed costs and lower-than-planned Tulsa volumes, underscoring the sensitivity of margins to production efficiency.

Sharp Drop in Operating Cash Flow

Operating cash flow for 2025 fell dramatically to just $0.5 million from $192.5 million in the prior year, as working capital needs and growth investments consumed cash. This stark swing in cash generation was a key concern on the call and stands in contrast to the company’s strong reported earnings growth.

Thin Liquidity and Higher Debt Burden

Year-end cash, cash equivalents, and restricted cash stood at only $1.2 million, while total debt reached $398.3 million, implying a leverage ratio of 1.77. Management acknowledged that interest expense will rise in 2026 and that debt reduction will likely be modest and back-half weighted as operating cash flow recovers.

New Facility Costs Weighing on Margins

AAON Oklahoma’s gross margin declined to 27.5% from 30.7%, reflecting roughly $6.4 million of incremental overhead tied to ramping the Memphis plant. These start-up costs are pressuring near-term profitability but are expected to normalize as Memphis volumes increase and fixed costs are better absorbed.

Operational Disruptions and ERP Challenges

Lower-than-expected output at Tulsa, driven by seasonal patterns and supply chain constraints, materially pressured Q4 margins. An ERP rollout at Longview also ran into issues, prompting a shift to a slower, phased implementation schedule for other sites to reduce operational risk while still modernizing systems.

Longer Lead Times and Backlog Conversion Risk

AAON’s backlog is not only large but also increasingly tied to multi-phase data center programs with longer timelines. Some high-volume Oklahoma product lines are now on lead times in the mid-20-week range, meaning only a portion of the current backlog will turn into revenue in 2026, adding timing risk to growth.

Memphis Still a Near-Term Margin Headwind

Although Memphis moved into the black on a quarterly basis, management cautioned that the plant still carries meaningful unabsorbed fixed costs. As a result, the facility remains a near-term drag on margins even as it sets the stage for future operating leverage once volume ramps further.

Plant Shutdowns and Inventory Actions

The Longview plant experienced a five-day shutdown at year-end to conduct a comprehensive inventory review, which temporarily disrupted throughput. While such actions are meant to improve control and accuracy, they also partially offset margin gains in the quarter by reducing production and increasing short-term costs.

SG&A Pressure and Execution Requirements

Management flagged that SG&A is running high as the company invests ahead of throughput, with a target of about 16% of sales in 2026. Hitting longer-term margin goals will require continued cost discipline and execution, particularly as AAON works to leverage this higher overhead base over a larger revenue scale.

Forward Guidance and Outlook

Looking ahead, AAON expects 2026 sales to grow 18%–20%, supported by the $1.3 billion Basics backlog and strong bookings, especially in data centers. Management anticipates gross margins moving into the 29%–31% range and operating cash flow improving materially, though quarterly margin progress may be uneven as Tulsa and Memphis utilization ramps and interest expense peaks early in the year.

AAON’s earnings call underscored a classic investment trade-off: powerful growth and backlog strength against near-term execution and balance-sheet risk. For investors, the story hinges on whether the company can translate its expanding capacity and product differentiation into sustained cash generation and margin improvement by 2026 without overextending its financial position.