AAR CORP (AIR)
AAR CORP (AIR) is an industrial company serving the aerospace and defense sectors, providing aircraft components, materials management services, and aftermarket support to commercial operators, military forces, and cargo providers worldwide.
What the company does
AAR CORP operates in two primary business segments focused on aviation and aerospace. The company supplies parts, components, and assemblies for commercial aircraft, helicopter operators, and military platforms. It also provides materials management services, including managing spare parts inventories for airline operators and defense contractors. These services allow customers to reduce their capital requirements for spare parts while maintaining operational readiness.
The company serves a wide range of clients, from major commercial airlines and regional carriers to military branches worldwide. As a distributor and service provider, rather than a manufacturer of the aircraft themselves, AAR CORP occupies a supportive role in the broader aerospace supply chain.
How it makes money
The company generates revenue through two distinct mechanisms. First, it sells aircraft parts, components, and materials directly to customers—both routine maintenance components and specialized assemblies. Second, it operates materials management contracts where it assumes responsibility for maintaining and managing spare parts inventory on behalf of its clients, taking on the working capital burden while providing availability guarantees.
The materials management business model creates recurring revenue streams because operators depend on the service continuously. The parts sales business benefits from the underlying demand for aviation maintenance and the ongoing need for components as aircraft age.
Where it sits in its industry
AAR CORP operates in a specialized segment of the aerospace supply chain focused on aftermarket services and component distribution rather than original equipment manufacturing. The company competes with other aerospace and defense distributors, in-house supplier networks operated by major airlines, and smaller regional parts suppliers.
The aerospace aftermarket is characterized by high barriers to entry—including regulatory certifications, customer qualification requirements, and the capital intensity of parts inventory management. Established relationships with airlines and defense customers create stickiness that favors incumbent providers. AAR CORP’s scale and diversified customer base provide some insulation from dependency on any single operator or platform.
How to research it
Investors can examine AAR CORP’s 10-K annual reports filed with the SEC, which detail segment performance, customer concentration, contract terms, and competitive dynamics. The company’s 10-Q quarterly reports provide updates on revenues, margins, and order backlog.
Key metrics to track include segment revenue trends, gross margins on parts versus services, customer retention rates, and the company’s working capital position—particularly inventory levels on behalf of managed customers. Earnings calls often discuss the health of the commercial aviation market, military spending trends, and integration of any acquisitions.