AAON, INC. 10-Q Summary: Quarter Ended September 30, 2025
Business Context and Reporting Period
This report covers the quarterly period ended September 30, 2025. AAON, Inc. is a leading manufacturer of premium heating, ventilation, and air conditioning (HVAC) equipment, including rooftop units, data center cooling solutions, and cleanroom systems. The company operates through three reportable segments: AAON Oklahoma, AAON Coil Products, and BASX. The company is a large accelerated filer and is not a shell company.
Key Financial Metrics
| Metric (in thousands) | Q3 2025 | Q3 2024 | 9M 2025 | 9M 2024 |
|---|---|---|---|---|
| Net Sales | $384,238 | $327,252 | $1,017,859 | $902,917 |
| Gross Profit | $106,861 | $114,158 | $275,954 | $319,494 |
| Gross Margin | 27.8% | 34.9% | 27.1% | 35.4% |
| Operating Income | $43,595 | $65,520 | $102,288 | $179,689 |
| Net Income | $30,782 | $52,625 | $75,561 | $143,869 |
| Diluted EPS | $0.37 | $0.63 | $0.91 | $1.72 |
| Operating Cash Flow (9M) | ($18,784) | $191,687 | — | — |
| Capital Expenditures (9M) | ($128,067) | ($99,371) | — | — |
| Total Debt (Long-term) | $360,142 | $138,891 | — | — |
| Cash & Equivalents | $1,041 | $14 | — | — |
| Restricted Cash | $1,226 | $6,500 | — | — |
Material Changes vs. Prior Period
- Revenue Growth: Net sales increased 17.4% in Q3 2025 and 12.7% for the nine months ended September 30, 2025, compared to the prior year. This was driven primarily by the BASX segment (up 19.2% in Q3, 42.2% YTD) due to strong demand for data center liquid cooling solutions.
- Margin Compression: Gross margin declined significantly from 34.9% to 27.8% in Q3 and from 35.4% to 27.1% YTD. Key drivers include:
- Tariffs: The first period of significant financial impact from new U.S. tariffs, with a 6.0% surcharge implemented in April 2025 not yet fully covering additional costs.
- ERP Implementation: Disruptions from a new Enterprise Resource Planning system at the Longview, Texas facility in Q2 2025 impacted production efficiency and overhead absorption.
- Raw Materials: Copper prices increased 20.5% (Q3 average) and 14.3% (YTD average).
- Memphis Plant: Overhead costs from the new Memphis facility are currently absorbed by the AAON Oklahoma segment while production benefits flow to BASX.
- Backlog Expansion: Total backlog surged to $1.32 billion as of September 30, 2025, a 103.8% increase year-over-year, largely attributed to BASX data center orders.
- Debt Structure: The company increased its revolving credit facility capacity to $500 million in May 2025 and rolled the remaining term loan balance into the revolver. Outstanding revolver borrowings increased to $360.1 million from $76.5 million at year-end 2024.
Guidance, Outlook, and Risks
- Tax Law Changes: The "One Big Beautiful Bill Act" (OBBBA) enacted in July 2025 introduced 100% bonus depreciation and permanent expensing of domestic R&D costs. The company estimates an annual 2025 effective tax rate of approximately 24.1% excluding discrete events.
- Capital Expenditures: The company invested $128.1 million in capital expenditures for the first nine months of 2025, with a full-year 2025 estimate of approximately $180 million to support expansion in Redmond, Longview, Parkville, and Memphis.
- Liquidity: Operating cash flow turned negative ($18.8 million used) for the nine months ended September 30, 2025, primarily due to significant increases in accounts receivable, inventory, and contract assets to fund the record backlog. The company maintains $139.2 million in available borrowing capacity under its amended revolver.
- Risks:
- Trade Policy: Ongoing uncertainty regarding tariffs and reciprocal trade restrictions could further increase material costs or reduce demand.
- Supply Chain: Challenges with specific manufacturing parts and a tight labor market (addressed via 4.0% wage increases in March 2025) remain risks.
- Interest Rates: Higher interest rates continue to impact the commercial construction market, potentially slowing AAON branded rooftop unit sales.
Investor Verification Checklist
- Tariff Pass-Through: Verify if the 6.0% surcharge is successfully offsetting tariff-related cost increases in Q4 2025 as management expects.
- ERP Stabilization: Monitor Q4 2025 results to confirm that production disruptions from the Longview ERP implementation have fully resolved and margins are recovering.
- Cash Flow Conversion: Track the conversion of the $1.32 billion backlog into cash flow, given the significant working capital outflows observed in the first nine months.
- Debt Covenants: Confirm continued compliance with the leverage ratio covenant (currently 1.73:1, well below the 3.0:1 limit) as debt levels remain elevated.
- Segment Mix: Assess the sustainability of BASX growth versus the cyclical softness in the AAON Oklahoma rooftop market.