AAON, Inc.'s Growth Makes 23x 2027 Earnings Look Reasonable

AAON shares are down roughly 47% from their highs as rapid capacity expansion and startup costs pressure gross margins and free cash flow. Management lowered its 2026 margin outlook but raised expected 2026 sales growth to 55%-60%, supported by a maintained $2 billion backlog and robust BASX data-center demand. The company expects margin recovery to become visible by 2027 as utilization at its Memphis facility improves.

Analysis

AAON is transitioning from a conventional HVAC earnings framework to a capacity-constrained data-center thermal-management story, but the market will not capitalize that transition until incremental revenue converts to gross profit. The key debate is whether BASX mix ultimately raises normalized margins through higher-value precision cooling, or whether bespoke projects, field labor and customer concentration make the business structurally more volatile than legacy AAON. Trane Technologies (TT) and Vertiv (VRT) are the relevant read-throughs: sustained order and margin strength at either would validate end-demand, while AAON-specific execution remains the differentiator.

The near-term setup is likely governed by quarterly evidence of factory absorption rather than bookings. A modest sequential gross-margin inflection can produce disproportionate EPS and multiple upside because fixed expansion costs are already embedded; conversely, another utilization delay would undermine confidence in the 2027 recovery narrative and could force further estimate resets. Negative free cash flow also matters more than usual: it limits AAON's ability to absorb additional working-capital needs if large data-center projects extend payment cycles.

Contrarian upside is that the selloff may be treating lower margin guidance as a demand problem rather than a timing problem. If hyperscaler buildouts continue shifting toward liquid cooling and high-density air handling, AAON's installed capacity could become strategically scarce by 2027, making current earnings an unusually poor proxy for normalized cash generation. Falsify that view if backlog conversion slows, BASX revenue growth decelerates materially versus TT/VRT data-center exposure, or gross margin fails to improve sequentially after Memphis ramps.

Key Decisions for Investors

• Maintain AAON as a watch-to-buy rather than a full immediate position; initiate a 50 bps starter only after the first quarterly report showing sequential gross-margin expansion and stable backlog conversion. Target a 12-18 month holding period, with upside tied to normalization of utilization; exit if management again pushes out the recovery timetable or guides incremental margins lower.
• For defined-risk exposure ahead of the margin inflection, prefer a 12-18 month AAON call spread over outright stock: buy an at-the-money call and sell a 25-35% out-of-the-money call. This captures a rerating if execution stabilizes while limiting loss if cash burn or project timing worsens.
• Use a relative-value expression for the next 1-3 months: long VRT or TT versus AAON if seeking data-center cooling exposure without AAON's ramp risk. Reverse toward long AAON versus VRT only once AAON demonstrates two consecutive quarters of improving gross margin, when operating leverage could narrow its valuation discount quickly.
• Monitor quarterly operating cash flow, inventory/receivables growth, and Memphis utilization as gating metrics. A rise in working capital that materially exceeds sales growth, or any backlog cancellation/conversion deterioration, should override the long thesis even if reported revenue remains strong.