AIR vs DCO

Key Takeaways

• AIR (AAR Corp.) is a leading aviation aftermarket services provider, while DCO (Ducommun Incorporated) is a manufacturer of engineered components for aerospace and defense platforms — two distinct business models within the same broad sector.
• AAR Corp. has delivered robust double-digit revenue and earnings growth in recent quarters, fueled by strong demand in its parts distribution and MRO (Maintenance, Repair, and Overhaul) segments across both commercial and government customers.
• Ducommun has posted record quarterly revenue and expanding gross margins, driven by surging defense demand — particularly in missile platforms — though commercial aerospace destocking remains a near-term headwind.
• Both companies benefit from secular tailwinds in global air travel recovery and elevated defense spending, but their risk profiles diverge: AIR is more exposed to commercial aviation cycles, while DCO is more tied to defense procurement and OEM (Original Equipment Manufacturer) production rates.
• Recent market momentum favors AIR with a roughly 30% year-to-date return, while DCO has demonstrated stronger margin expansion and a record backlog that points to multi-year revenue visibility.
• Investors weighing these two names are essentially comparing an asset-light aviation services growth story against a manufacturing-heavy defense supplier executing a multi-year margin improvement plan.

Introduction

The aerospace and defense sector continues to attract investor attention as global air travel surpasses pre-pandemic levels and defense budgets expand across NATO countries. Within this landscape, AIR (AAR Corp.) and DCO (Ducommun Incorporated) represent two fundamentally different approaches to capturing value in the aerospace supply chain. AAR Corp. focuses on aftermarket aviation services — keeping aircraft flying through parts supply, maintenance, repair, and software solutions. Ducommun, by contrast, manufactures complex structural and electronic components that go directly into aircraft and defense platforms during production. This comparison examines how each company is positioned in the current market environment, what has driven their recent performance, and which factors may influence their relative outlook.

AIR Overview and Recent Performance

AAR Corp. (AIR), headquartered in Wood Dale, Illinois, is a leading independent provider of aviation aftermarket services to commercial airlines, cargo operators, OEMs, and government agencies worldwide. The company operates through three primary segments: Parts Supply (sale and distribution of new and used serviceable engine and airframe parts), Repair & Engineering (airframe and component MRO services), and Integrated Solutions (fleet management and performance-based logistics). AAR also offers the Trax aviation maintenance software platform, which has been gaining traction with major airline customers.

In recent market activity, AIR has demonstrated strong momentum. The company delivered record sales of approximately $2.8 billion in its fiscal year 2025, representing 20% year-over-year growth. Adjusted EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) rose 34% to $324 million, with adjusted EBITDA margins expanding to 11.8% from 10.4% a year earlier. The Parts Supply segment has been a standout performer, with organic new parts distribution sales growing over 20%, driven by both market growth and market share gains through exclusive distribution agreements with OEMs. Government sales grew 21% in recent quarters, reflecting increased order volume from defense agencies. The company has also made strategic portfolio moves, substantially completing the integration of its Product Support acquisition and divesting its Landing Gear Overhaul business to sharpen focus on higher-growth, higher-margin activities. Net leverage has declined from 3.58x to 2.72x, strengthening the balance sheet for future capital allocation.

DCO Overview and Recent Performance

Ducommun Incorporated (DCO), California's oldest company, is a provider of engineering and manufacturing services for high-performance products primarily serving the aerospace and defense industries. The company operates through two segments: Structural Systems, which produces complex metal components for commercial and military aircraft, and Electronic Systems, which manufactures electronic and electromechanical products for aerospace and defense applications, including missile systems, radar, and classified programs. Key customers include Boeing, Airbus, RTX, and Lockheed Martin.

Ducommun has posted a series of record-setting quarters in recent periods. The company achieved full-year 2025 revenue of approximately $825 million — its third consecutive annual revenue record — with Q4 2025 revenue reaching $215.8 million, a 9.4% year-over-year increase. Gross margins expanded significantly to 26.9% for the full year, while adjusted EBITDA margins reached 16.4%, steady progress toward the company's VISION 2027 target of 18%. The defense business has been the primary growth engine, with the missile franchise growing 21% in recent quarters. Ducommun's remaining performance obligations (RPO) — a GAAP measure of contracted but not yet recognized revenue — reached a record $1.1 billion, underpinned by a book-to-bill ratio of 1.3x to 1.6x. However, the company has faced headwinds in its commercial aerospace segment due to destocking at Boeing and Spirit AeroSystems, which has partially offset defense gains. A significant litigation settlement of approximately $99.7 million impacted GAAP net income in recent quarters, though adjusted results reflect the underlying operational strength. With more than 95% of manufacturing based in the United States, Ducommun carries limited exposure to tariff volatility.

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Head-to-Head Comparison

While both AIR and DCO operate within the aerospace and defense ecosystem, their business models, growth drivers, and risk profiles differ substantially. AAR Corp. is an aftermarket services provider: its revenue is tied to the global fleet of aircraft already in operation, generating recurring income from maintenance cycles, parts replacement, and logistics. Ducommun, in contrast, is a Tier 1/Tier 2 manufacturer whose fortunes are more closely linked to new aircraft production rates and defense procurement cycles.

On the growth dimension, AIR has posted higher top-line growth rates — approximately 20% in its most recent fiscal year — driven by organic parts distribution gains and acquisition integration. DCO has grown at a more measured mid-single-digit pace, but its margin expansion story is arguably more compelling, with gross margins reaching 27.7% in Q4 2025 and adjusted EBITDA margins climbing toward the 18% VISION 2027 target.

In terms of market sentiment and risk factors, AIR faces exposure to commercial aviation cycles and airline spending patterns, though its diversified government revenue (roughly 29% of sales) provides some buffer. DCO must navigate the ongoing Boeing 737 MAX production ramp and destocking headwinds in commercial aerospace, but its defense-heavy backlog — anchored by missile programs and long-term agreements with prime contractors — offers multi-year revenue visibility that AIR's transactional aftermarket model does not. From a balance sheet perspective, AIR carries net leverage of 2.72x following its acquisition activity, while DCO's litigation-related cash outflows represent a near-term liquidity consideration that investors should monitor.

Tickeron AI Verdict

Based on observable factors such as trend consistency, earnings momentum, and relative market positioning, Tickeron's AI-powered analysis would likely find a more favorable configuration in AIR for trend-oriented strategies in the current environment. AAR Corp. has demonstrated accelerating organic revenue growth, consistent earnings beats, expanding margins, and strong price momentum — characteristics that algorithmic trend-following systems typically identify as constructive. The company's aftermarket-focused model also benefits from the continued recovery in global flight activity and the aging aircraft fleet, which drives higher maintenance demand. That said, DCO presents a potentially attractive setup for mean-reversion or value-oriented strategies, given its record backlog, margin expansion trajectory, and the eventual normalization of commercial aerospace destocking. The divergence in their recent price behavior and underlying business momentum suggests that, in a probabilistic framework, the AI would currently assign a higher confidence score to AIR's near-to-medium-term trend persistence while acknowledging DCO's strengthening fundamentals as a developing opportunity.

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