AAR Corp.
AAR Corp. is a global aviation aftermarket services provider serving commercial airlines, MROs, OEMs, and government/defense customers with parts supply, repair, engineering, software, and mission support.
What the page says before deeper research
Quality, growth, value, ownership, risk, and source confidence.
Moat 64/100 with low retention risk.
Growth appears healthy from +17% YoY revenue growth.
Forward P/E of 21.9x versus +17% growth gives a 1.3x multiple-to-growth read.
No SEC-backed 13F layer is matched yet, so ownership confirmation is unavailable.
Retention and AI disruption risks are low; valuation is not flagged expensive.
Fundamentals from StockAnalysis quote/profile snapshot and AAR investor materials reviewed 2026-05-21 as of 2026-05-07 market close for quote snapshot; company sources reviewed 2026-05-21; ownership confirmation is not available here.
Next earnings date
Beginner valuation check
Data pending from FMP or Finnhub.
1-year performance available from cited market-data source; shorter 1D/1M/6M/YTD fields omitted because not fully source-backed in the reviewed sources.
Forward P/E available from cited market-data source.
Trailing P/E available from cited market-data source.
Source: market data index. As of May 21, 2026. P/E can be unavailable or misleading when earnings are negative.
Beginner guide
AAR is like a giant repair shop and parts closet for airplanes.
It supplies aircraft parts, repairs components and airframes, provides engineering/software support, and serves commercial aviation plus government and defense customers.
AAR earns revenue from selling and leasing parts, exchange programs, repair and maintenance work, engineering services, software, and government support contracts.
Airlines need reliable aftermarket partners to reduce aircraft downtime, and defense customers need readiness support. If AAR grows parts supply, improves margins, and integrates acquisitions well, earnings can rise.
Air travel cycles can weaken, parts availability can tighten, labor costs can rise, acquisitions can disappoint, contracts can be rebid, and OEMs or larger MROs can pressure pricing.
If an airline is a bus company in the sky, AAR is the parts warehouse and certified mechanic that helps keep the buses flying safely.
AAR is a niche industrial aftermarket company with useful scale and certifications, but its moat depends on execution, inventory, customer service, and contract wins.
Aircraft on ground; a plane cannot fly until a problem is fixed, often creating urgent parts demand.
Maintenance, repair, and overhaul work done to keep aircraft safe and usable.
An expensive aircraft component that can be repaired and reused across fleets.
A customer receives a working part quickly and later returns the failed core part.
Regulatory approval that allows a facility to perform certain aviation repair work.
AAR’s work supporting defense and government customers with logistics, readiness, and repair services.
The first four questions
The stock can rise if AAR posts strong parts demand, higher repair throughput, better margins, successful acquisition integration, and confident guidance.
The stock can fall if airline aftermarket demand slows, contract wins disappoint, costs rise, parts shortages hurt service levels, or valuation multiples compress.
Unavailable from cited sources.
Unavailable from cited sources.
Bull / Neutral / Bear
Unavailable from cited sources.
Unavailable from cited sources.
Unavailable from cited sources.
Unavailable from cited sources.
Unavailable from cited sources.
Unavailable from cited sources.
Unavailable from cited sources.
Unavailable from cited sources.
Beginner checklist
Next earnings date
Revenue growth
Margin trend
Forward P/E
13F ownership changes
Insider buying/selling
Main company-specific KPI
AAR Corp. is exposure to industrials operating model with medium switching costs and 100% net revenue retention.
AAR's moat is built on aviation aftermarket scale, hard-to-replicate inventory access, repair certifications, and long customer relationships rather than a patent-like monopoly.
The main question is whether the company can keep customer value compounding without margin pressure eroding the moat.
Pro access unlocks the workflow simulator for this company brief.
Simulator coverage pending
This ticker has a company brief, but richer workflow modules have not been built yet.
No SEC-backed 13F rows are matched for this ticker yet. We do not fabricate ownership rows.
- AAR's moat is built on aviation aftermarket scale, hard-to-replicate inventory access, repair certifications, and long customer relationships rather than a patent-like monopoly.
- The edge is strongest in urgent AOG, distribution, and regulated repair workflows where speed, documentation, and quality history reduce customer willingness to switch.
- Fragility comes from cyclical airline demand, OEM vertical integration, defense contract rebids, acquisition integration risk, and labor/parts shortages.
- Recent segment realignment toward Parts Supply, Repair/Engineering/Software, and Government Solutions may make the model cleaner but also raises execution expectations.