Defense demand surges, but trust and tariffs remain risks
- Ducommun is a behind-the-scenes supplier to aerospace and defense primes, where failure can be very costly.
- Aerospace and defense made up 96% of 2025 net revenue, so the company now lives mostly on those programs.
- Missiles are the main growth story, with the missile business up 68% in Q2 2026 and now accounting for 35% of trailing defense revenue.
- The company is pushing toward engineered products with its own intellectual property, such as a recent 737 MAX retrofit switch win.
- The hard parts are commercial aerospace destocking, Boeing exposure, new 2026 global tariffs, and a financial reporting restatement.
Missiles help, cleanup hurts
Ducommun is in a good place in the defense supply chain. It makes engineered parts and electronics for programs where quality matters more than cheap volume. The company is actively shifting revenue toward higher-margin engineered products and aftermarket content, which reached 23% of revenue in 2024.
The bull case is heavily supported by missiles, radar, and electronic warfare. In Q2 2026, the missile business grew 68%. Management noted that missiles, radar, and electronic warfare combined now represent about 35% of last 12-month defense revenue and more than 20% of total Ducommun revenue. This includes major wins like a $40 million cabling assembly order for the Patriot PAC-2 missile.
There is a margin story too. Ducommun has been closing and combining facilities, and management sees better margins as those moves ramp in 2026. The company recently won a major 737 MAX retrofit switch order via its Carson performance center, an engineered product with owned intellectual property that should drive recurring revenue.
The bear case is not gone. Commercial aerospace destocking is expected to have some impact in the remaining quarters of 2026 before easing. Boeing remains a large customer with labor strike and production risks. New global tariffs, including July 2026 Section 304(a) actions, add pressure, though civil aircraft parts hold exemptions. Finally, a restatement tied to internal control weakness makes the stock harder to trust.
Paid for hard parts
Ducommun gets paid to design, engineer, and manufacture parts that customers do not want to build alone. Most of its work goes into aerospace and defense systems, including aircraft structures, missile parts, radar electronics, and wiring.
The company works through two segments. Electronic Systems makes high-reliability electronics and electromechanical assemblies. Structural Systems makes complex aircraft structures, composite parts, metal bonded parts, and assemblies for commercial and military platforms.
This is not a simple parts catalog business. Many contracts use customer designs and strict quality rules. That can make Ducommun sticky once it wins a place on a platform, but it also means mistakes, production delays, or cost overruns can hit margins.
The model breaks if large customers slow orders, if tariffs cannot be passed through, or if contract cost estimates prove wrong. The internal control weakness and restatement add another layer of risk because investors need clean numbers to judge whether the margin plan is working.
What Ducommun builds
Missile systems
Missiles are the core growth engine. The missile business grew 68% in Q2 2026, driven heavily by PAC-3 replenishment and 7-year framework agreements.
Radar and electronic warfare
Ducommun makes high-reliability electronics for radar and defense systems. Management highlighted the SPY-6 radar circuit card as tracking over $10 million in revenue for one assembly in 2024.
Commercial aerospace structures
Ducommun supplies aircraft structures and has added content on the 737 MAX and 787. The company recently secured a margin-accretive retrofit switch order for the 737 MAX fleet.
Defense aircraft parts
The Apache tail rotor blade is in full production at Coxsackie, New York, while TOW missile cases are in production in Guaymas, Mexico.
Patriot missile cabling
Ducommun expanded its European defense reach with a major cabling assembly order for the Patriot PAC-2 missile worth more than $40 million.
Two operating engines
Segment mix is based on early 2026 net revenue split. Electronic Systems is about 56% of revenue and Structural Systems is about 44%, with customer concentration remaining important.
What can go wrong
Boeing and commercial aerospace stalls
High impact · Medium oddsBoeing is one of Ducommun's largest customers. While the FAA cleared Boeing's plan to raise 737 MAX production, a recent Boeing labor strike and potential quality control delays mean Ducommun's revenue and factory use could still suffer.
Destocking lasts longer
Medium impact · High oddsManagement expects internal and external destocking to come to an end in the next couple of quarters. If customers keep burning inventory instead of placing new orders beyond 2026, growth could lag the defense story.
Tariffs pressure margins
Medium impact · Medium oddsA 10% global tariff went into effect in early 2026, followed by July 2026 Executive Order tariffs of 10% to 12.5% on non-exempt goods. While civil aircraft parts hold exemptions, Ducommun could see profitability hurt if it cannot claim exemptions on other inputs or pass costs to customers.
Financial reporting trust gap
High impact · Medium oddsManagement previously identified a material weakness in internal control over financial reporting, leading to restated prior financials. This raises the burden of proof on execution and reported margins.
In one breath
What does Ducommun do?
Ducommun designs and manufactures electronics, aircraft structures, missile parts, cabling, and other engineered components. Most of its work serves aerospace and defense customers.
Why are investors focused on missiles?
Missiles are growing faster than the rest of the company. In Q2 2026, the missile business grew 68%, making it a major engine for total revenue growth.
What is the biggest risk for DCO stock?
The biggest risks are execution and trust. Ducommun must turn defense backlog into profitable revenue while handling commercial aerospace destocking, Boeing exposure, tariffs, and an internal control weakness.
