Aerospace supplier moats are built on certification — and they're brutal to break.
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✦ The bottom line
Ducommun's moat is qualification. Every component on an aircraft or missile platform must be certified — a process that takes years, costs millions, and ties the platform's supplier to the program for decades. Ducommun holds qualified positions on the Patriot missile (its largest defense franchise), the F-35 and F-15 fighters, the Boeing 737 MAX and Airbus A220/A320, plus commercial rotorcraft.
↓ the brief below
✦ Teach me
Why aerospace 'qualification' is the moat
Before a supplier's part can ride on an aircraft or weapon, it must pass FAA, DoD, and prime-contractor qualification. That takes 18-36 months and costs millions in testing alone. Once qualified, changing suppliers requires the entire process again. So if Ducommun is on the F-35 today, it's likely on the F-35 for the program's 50-year life. Boeing won't switch unless Ducommun fails on quality or delivery. The result: low growth but very durable revenue.
Wall Street calls this
Aerospace qualification
It's the reason a Ducommun-grade aerospace supplier trades at a premium to a generic industrial — even at the same margin profile.
The customer · RTX is largest
#1
customer
RTX (formerly Raytheon Technologies) is Ducommun's largest customer — anchored by the Patriot missile franchise. Lockheed Martin is also a major customer via the F-35 program.
Source · 8-K · Item 2.02 — CEO commentary · Q1 2026 · Filed May 12, 2026
Ducommun's reputation didn't appear overnight. The company was founded in Los Angeles in 1849 — making it the oldest company headquartered in California — and has been on the aerospace value chain since the 1940s, when Southern California became the cradle of US aviation.
176 years of staying useful
1849
Charles Ducommun opens a hardware store in Los Angeles — same year as the California Gold Rush.
1940s
Pivots to aerospace metal-bending for Southern California aircraft manufacturers during WWII.
1980s-90s
Adds electronic systems via acquisition — becomes a dual-segment aerospace component supplier.
2023
Launches VISION 2027 — multi-year plan to expand adjusted EBITDA margin to 18%.
Now
Q1 2026 hits record revenue and 16.9% adj EBITDA margin — six quarters from the VISION 2027 target.
The strategy, in management's words
Ducommun's strong missile franchise should also continue to gather momentum throughout the year as we are well positioned to benefit from the Department of War's long-term 7 year framework agreements for key missile programs with defense primes including RTX, our largest customer and Lockheed Martin.
↳ Seven-year framework agreements are the structural advantage of tier-2 aerospace. RTX and Lockheed have committed visibility through 2032 — and that flows directly to Ducommun's order book.
Source · 8-K · Item 2.02 — CEO commentary · Q1 2026 · Filed May 12, 2026
⚠
Watch
Real durable positions on multi-decade aircraft and missile programs — but the moat depends on Ducommun keeping quality and delivery clean.