Aircraft Manufacturing (United States) — NAICS 336411

An investor's primer for public-market and private investors.

1. Overview

Aircraft manufacturing is the business of designing, assembling, and overhauling complete aircraft — jetliners, business jets, military planes, helicopters, and, increasingly, electric air taxis and drones. It is one of the most concentrated, capital-intensive, and strategically important industries in the U.S. economy. A handful of firms build almost everything, each new model costs billions and years to certify, and once a plane is flying it generates decades of high-margin spare-parts and service revenue.

Why an investor should care: it is a long-cycle, high-barrier industry with two very different engines of demand — commercial air travel (cyclical, tied to the global economy) and defense (steadier, tied to government budgets). U.S.-built aircraft and spacecraft were roughly a $134 billion export in 2024, and aerospace runs the largest trade surplus of any American manufacturing sector.[14] The global order backlog stood at more than 17,000 jets at the end of 2025 — over a decade of guaranteed work at current build rates.[6]

Ways in. Public-market investors can own the two U.S.-listed commercial-jet and defense-aircraft makers (Boeing; and the aircraft arms of Lockheed Martin, Northrop Grumman, General Dynamics, and Textron), plus speculative electric-aircraft startups and sector exchange-traded funds. Pure-play public "aircraft assembler" choices are few, because most airframers are embedded inside larger defense or diversified-industrial companies, or are foreign-listed (Airbus, Embraer) or privately/government-controlled. Private investors more often play the supply chain — aerostructures, maintenance shops, and the emerging air-mobility venture space.

2. What it is and how it's structured

Scope (NAICS 336411). The North American Industry Classification System (NAICS) code 336411 covers establishments that (1) build or assemble complete aircraft, (2) develop and make aircraft prototypes, (3) perform major aircraft conversions, and (4) do complete overhaul and rebuilding. It includes airplanes, helicopters, gliders, blimps, ultralights, and unmanned/robotic aircraft (drones).[2]

What it excludes — important, because the "aircraft" complex is much larger than this one code:

• Aircraft engines and engine parts → NAICS 336412 (e.g., GE Aerospace, RTX's Pratt & Whitney).[2]
• Other aircraft parts and auxiliary equipment (aerostructures, landing gear, avionics) → NAICS 336413.[2]
• Guided missiles and space vehicles → NAICS 336414.[2]
• Routine aircraft repair (not overhaul/rebuild) → NAICS 488190; aircraft R&D (except prototypes) → NAICS 541715; flight simulators → NAICS 333310.[2]

So 336411 is specifically final aircraft assembly and overhaul. The jet you see rolling out of a factory is the 336411 product; its engines, wings, and fuselage panels are counted in adjacent codes — often even when the same parent company makes them.

Operating model. A program moves through design and prototype construction, extensive ground and flight testing, type certification, production certification, supplier qualification, tooling, and production ramp-up. The FAA describes a seven-phase civil-certification process ending in type and production certificates; an amended type certificate typically takes three to five years and a new aircraft type five to nine years.[21] Final assemblers integrate engines, avionics, aerostructures, and other systems, manage configuration and traceability, perform testing, and deliver a certificated aircraft. Supplier substitution is difficult — Boeing says qualifying a new supplier can take a year or more and that it relies on sole sources for numerous major components.[3]

Ownership mix. This is a private, corporate industry — publicly traded giants (Boeing), divisions of larger public companies (Gulfstream inside General Dynamics; Bell and Cessna inside Textron; military aircraft inside Lockheed Martin and Northrop Grumman), foreign-headquartered firms with U.S. plants (Airbus assembles A320s and A220s in Mobile, Alabama), and a wave of venture-backed startups building electric air taxis. Notable private players include General Atomics Aeronautical Systems (remotely piloted aircraft), Sierra Nevada Corporation (aircraft modification and systems integration), and Honda Aircraft Company (HondaJet, wholly owned by Honda).[22][23][24] The U.S. government is the dominant customer for military output but does not own the factories.

3. How big it is

Federal statistics for NAICS 336411 (U.S.):

The concentration is extreme: four firms account for 83.5% of revenue, and the top twenty for essentially all of it (97.7%).[1] The Herfindahl-Hirschman Index (HHI), the standard concentration score, is suppressed in the federal data for this industry, so we do not report a value.[1] Note: BLS sectoral output adjusts gross output for inventory changes and removes shipments among related establishments — it differs from Census value of shipments.

Undercount and interpretation caveats. Federal business statistics capture this industry's establishments well — it is not a government-run or gig-worker industry that slips through the data. Two things do distort the picture, though. First, 336411 counts only final assembly and overhaul; the engines, avionics, and aerostructures that make up most of a plane's cost sit in NAICS 336412/336413, so this single code understates the true "aircraft-building" economy. The broader U.S. aerospace and defense sector supports on the order of $850 billion in economic activity by industry-association estimates.[14] Second, because a few vertically integrated firms dominate, small changes in corporate structure move the numbers — for example, Boeing's late-2025 reabsorption of aerostructures supplier Spirit AeroSystems shifts roughly 15,000 workers and large volumes of production back inside Boeing.[8]

4. The investable universe

There are surprisingly few pure public "aircraft assembler" stocks. Most exposure comes through diversified aerospace-and-defense companies or foreign listings. Tickers and rough scale are for orientation only.

U.S.-listed companies with meaningful aircraft-assembly exposure:

Major private, foreign, or non-corporate players:

• Airbus (Paris/Frankfurt listed; U.S. ADR EADSY) — the global commercial leader, with A320/A220 final assembly in Mobile, Alabama.[15]
• Bombardier (Canada) and Dassault Aviation (France) — business jets.
• COMAC (China, state-owned) — the emerging third large-jet maker with the C919.[5]
• Cirrus Aircraft (Hong Kong listed, 2507.HK) — piston and jet aircraft.[28]
• Sikorsky (helicopters, inside Lockheed Martin) and numerous private and venture-backed drone/eVTOL firms.
• The U.S. government as buyer, and aircraft-leasing companies (AerCap, Air Lease) as major order-placers — though leasing is finance, not manufacturing.

For diversified exposure, sector funds such as the iShares U.S. Aerospace & Defense ETF (ITA) and SPDR S&P Aerospace & Defense ETF (XAR) hold the airframers alongside engine and parts suppliers, though these include companies outside NAICS 336411.[29][30]

5. How the money works

Aircraft makers earn money very differently from most manufacturers, and the metrics that matter are specific to this industry.

Programs, not products. A clean-sheet jetliner can cost well over $10 billion and a decade to develop and certify before it earns a dollar. Boeing's commercial arm uses program accounting, spreading production costs across an "accounting quantity" of aircraft; the first units off a line are typically built at a loss (the "learning curve"), and profit is expected to arrive on later units.[16] This is why headline segment margins can be negative during a ramp even when demand is strong.

Backlog is the balance sheet's crown jewel. Firm orders convert to cash only on delivery, so investors watch: backlog (Boeing Commercial Airplanes reported $567 billion in backlog at end of 2025, with the company's total backlog including defense exceeding $500 billion [3]); the book-to-bill ratio (new orders divided by deliveries — above 1.0 means the pipeline is growing); the monthly production rate; and free cash flow per aircraft as output ramps.

The real profit pool is the aftermarket. Selling a new airframe is often a thin- or negative-margin affair; servicing the installed fleet for decades is not. Boeing's services arm posted an adjusted operating margin near 18–19% in late 2025, while its commercial-airplane manufacturing margin was still negative.[16] Spare parts, maintenance, repair and overhaul (MRO), and upgrades are an annuity that grows with every plane delivered — a core reason companies chase large installed bases. General Dynamics' Aerospace segment illustrates this split: of its $13.1 billion in 2025 revenue, $9.4 billion was aircraft manufacturing and $3.7 billion was aircraft services; Textron Aviation similarly derived $2.0 billion (34%) from aftermarket parts and services.[11][12]

Defense math is different. Military work is booked on long-term contracts. Cost-plus contracts reimburse costs plus a fee (lower risk to the maker); fixed-price development contracts cap the price, and overruns hit the manufacturer. Boeing's fixed-price defense programs (the KC-46 tanker, T-7 trainer, VC-25B presidential aircraft) have produced billions in charges.[3] Lockheed's Aeronautics segment ran a 6.9% operating margin in 2025 but recorded $495 million in unfavorable profit-booking-rate adjustments, including a $950 million reach-forward loss on a classified program.[10] Northrop's 2025 Aeronautics result included a $477 million B-21 bomber loss provision.[20]

Program accounting can mask risk. In 2025, Boeing recorded combined 777X and 767 reach-forward losses of $5.3 billion, including a $4.9 billion 777X charge, despite recovering delivery volume.[3] Strong orders do not guarantee strong returns: certification delays, production instability, unfavorable program-accounting revisions, and fixed-price losses can overwhelm otherwise excellent end-market demand.

Cyclicality and cash. Commercial demand rises and falls with airline profits and the air-travel cycle; defense demand is steadier and often counter-cyclical. The business is inventory-heavy and gated by the slowest supplier — engines and aerostructures frequently cap how many planes can be finished.

Cost pressures. BLS's input-goods price index for airplane manufacturing reached 131.9 in May 2026 (February 2014 = 100), while the industry's unit-labor-cost index hit 189.4 in 2023 (2017 = 100) and labor productivity fell to 57.3 on the same base — reflecting severe post-pandemic productivity and cost pressures.[25][31]

6. What drives demand

• Air-travel growth. Global passenger traffic, measured in revenue passenger kilometers (RPK — one paying passenger flown one kilometer), hit a record in 2025: about 5.2 billion travelers, with RPK roughly 9% above the pre-pandemic 2019 peak and load factors near 84.6%.[6] U.S. system passengers declined 0.4% in fiscal 2025 but remained 6% above 2019, and U.S. reporting passenger carriers generated $12.3 billion in operating profit — well below the $22.1 billion five-year pre-pandemic average.[32]
• Fleet replacement and fuel efficiency. Airlines retire older jets for newer models that burn less fuel and emit less carbon; the world fleet is projected to grow from roughly 29,000 aircraft in 2025 to about 38,300 by 2035 (~2.8% a year), on top of replacement demand.[7] The FAA forecasts the active U.S. commercial fleet increasing from 6,949 aircraft in 2025 to 10,677 by 2046 (2.1% annual growth), with mainline passenger jets rising from 4,626 to 6,890.[32]
• Airline profitability and financing. Orders require airlines (or lessors) able to fund deposits and delivery payments; credit conditions matter.
• Defense budgets and geopolitics. The Pentagon requested roughly $205 billion in procurement funding for fiscal 2026, up sharply.[18] The Congressional Research Service reports $68.3 billion specifically for aircraft-related procurement and RDT&E in the FY2026 request, funding fighters (F-35, the new F-47), bombers (B-21), and tankers (KC-46).[33] Conflicts and great-power competition lift and sustain this demand.
• Business-jet and general-aviation demand. Tied to corporate profits and wealth; 2024 general-aviation deliveries topped $31.9 billion in billings, the first time above $30 billion in a decade.[13] The FAA reports 2,316 U.S.-manufactured general-aviation deliveries in 2025, up 6.8% from 2024 and 31% from 2019; business-jet deliveries rose 13.1%.[32]
• New categories. Electric vertical-takeoff aircraft (eVTOL) and drones are creating a potential new demand class. However, as of March 2026, the FAA had certificated no manned electric-aircraft design for commercial operations; only 23 of 16,788 certification projects received since 2018 involved electric propulsion.[34] This remains a venture and certification pipeline, not yet a demonstrated substitute for conventional production.

7. Regulation

Regulation is the industry's central gatekeeper — no aircraft can be sold until a regulator certifies it, and no military plane can be exported without a license.

• Safety certification. In the U.S. the Federal Aviation Administration (FAA) grants a type certificate after exhaustive testing and documentation proving a design is safe; Europe's counterpart is the European Union Aviation Safety Agency (EASA).[17] Certification can take years and is the single largest hurdle for any new model, including electric air taxis.
• Post-737 MAX oversight. After a door-plug panel blew out of an Alaska Airlines 737-9 in January 2024, the FAA capped 737 MAX output at 38 per month and pulled back Boeing's delegated inspection authority.[9] The NTSB concluded that missing securing bolts and inadequate Boeing training, guidance, and oversight caused the accident, while finding FAA oversight of repeated nonconformance ineffective.[35] Boeing operated to a formal safety-and-quality plan; the FAA raised the cap to 42/month in October 2025 and later to 47/month in 2026, and partially restored Boeing's authority to issue airworthiness certificates.[9]
• Export controls. Military aircraft, engines, and components are governed by the International Traffic in Arms Regulations (ITAR), administered by the State Department's Directorate of Defense Trade Controls; dual-use civil items fall under the Commerce Department's Export Administration Regulations (EAR). Selling abroad requires registration, licenses, and controls on who can access the technology.[17]
• Antitrust. Consolidation is scrutinized. To win European approval for the Spirit AeroSystems deal, Boeing agreed to divest the Spirit sites that supply Airbus.[8]
• Environmental. International Civil Aviation Organization (ICAO) CO2 and noise standards increasingly shape what can be designed and sold.

8. Competitive dynamics and consolidation

Large commercial jets are a duopoly. Airbus and Boeing split almost the entire market; in 2025 Airbus held roughly 56% and Boeing roughly 40%, with Embraer (~3.6%) and China's COMAC (~0.4%) at the margins.[5] Boeing's production and quality troubles let Airbus stretch its lead, and Airbus is pushing toward 75 A320-family jets a month by 2027, including a second final-assembly line opened in Mobile, Alabama.[15]

Barriers to entry are enormous — certification, capital, decades-long backlogs, intellectual property, and, above all, a safety reputation that takes years to build and moments to lose. That is why COMAC's slow entry is closely watched: it is the first credible new large-jet competitor in decades.

Vertical re-integration. After outsourcing structures in the 2000s, Boeing reversed course and completed its ~$4.7 billion reacquisition of Spirit AeroSystems in December 2025, pulling 737/787/777 fuselage and structures work back in-house to regain quality control.[8] Supplier consolidation is a continuing theme across the sector.

Adjacent battlegrounds. Business jets are contested by Gulfstream (General Dynamics), Bombardier, Dassault, Textron, and Embraer; military aircraft by Lockheed Martin, Boeing, Northrop Grumman, and General Dynamics; the emerging eVTOL race is led by Joby and Archer.

9. Risks

• Safety and quality events. Groundings, crashes, and quality lapses carry direct financial, regulatory, reputational, and liability costs — the 737 MAX saga is the defining example.[9][35]
• Execution and ramp risk. Ramping production without defects is hard; margins can stay negative through a ramp even with a full order book.[16]
• Supply chain. Output is gated by engines (GE, RTX, Safran) and aerostructures; shortages or a single supplier's stumble caps deliveries. In a GAO survey, 15 of 17 manufacturers reported difficulty hiring sufficient skilled workers, 15 reported material shortages, and 9 of 15 Boeing or Airbus suppliers had difficulty meeting the rebound in orders.[36]
• Fixed-price defense charges. Overruns on fixed-price development programs fall on the manufacturer and have cost Boeing billions.[3]
• Cyclicality and customer health. Commercial demand swings with airline profits, travel cycles, and financing; a downturn slows orders and can trigger deferrals or cancellations.
• Geopolitics and trade. Export limits, tariffs, and the use of large orders as diplomatic bargaining chips (notably with China) can move billions. General Dynamics reported that tariffs reduced its Aerospace margin by 30 basis points in 2025.[11]
• Labor. Strikes hit output — Boeing's more-than-30,000-member IAM District 751 unit struck for 53 days in 2024, stopping most commercial-aircraft and some defense production; approximately 3,200 St. Louis workers struck for 101 days in 2025.[3]
• Balance sheet. Heavy development spending and crisis-era losses have left some makers (Boeing) carrying significant debt.
• Technology transitions. eVTOL, hydrogen, and sustainable aviation fuel could reshape the field — an opportunity for new entrants and a threat to incumbents that misjudge the timing.

10. How to invest, and the outlook

Public-market routes. The cleanest large-cap way in is Boeing (BA), the only U.S.-listed maker of large commercial jets, now paired with a defense-aircraft franchise. For military-aircraft exposure, Lockheed Martin (LMT) and Northrop Grumman (NOC); for business jets, General Dynamics (GD, Gulfstream) and Textron (TXT, Cessna/Beechcraft/Bell). Foreign options include Airbus (EADSY ADR) and Embraer (ERJ). Speculative, pre-revenue plays on electric air taxis include Joby (JOBY) and Archer (ACHR). Diversified funds — ITA and XAR — spread exposure across airframers, engine makers, and parts suppliers, and are the lower-volatility way to own the theme (though they include companies outside 336411).[29][30]

Private-market routes. Because the airframers themselves are mostly public or state-linked, private capital tends to target the ecosystem: private equity in aerostructures, components, and MRO/aftermarket businesses (durable, high-margin, recurring revenue); venture capital in eVTOL, drones/uncrewed systems, and advanced air mobility; and direct positions in supply-chain firms feeding the majors. Note that aircraft leasing (AerCap, Air Lease) is a related but distinct financial business, not manufacturing.

Common analytical errors. Treating "Boeing and Airbus" as the whole industry; assigning broad aerospace-and-defense employment or export figures to 336411; interpreting establishments as companies; treating backlog as guaranteed revenue; and comparing company segment margins without adjusting for services and accounting methods.

Near-term outlook (forward-looking). The setup is unusually demand-rich: a record 17,000-plus jet backlog representing over a decade of work, record air travel, robust defense budgets, and both duopoly members racing to lift output.[6][18] The swing factor is supply, not demand — whether Boeing can sustainably raise 737 rates (past 42 toward 47+ a month) and restore commercial-airplane profitability, whether Airbus hits 75 a month, and whether the supply chain (engines and structures) keeps pace.[9][15] Boeing's return to a full-year net profit in 2025 — its first since 2018, though flattered by asset sales while its commercial unit still lost money — captures the moment: the order book is the envy of manufacturing, but converting it into margins and cash is the unfinished job.[3] Longer term, defense modernization and the certification of electric air mobility are the two frontiers most likely to reshape who makes money in this industry.

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Sources

1. U.S. Census Bureau — County Business Patterns 2023 and Economic Census 2022 (Comparative Statistics / Concentration), NAICS 336411; U.S. Small Business Administration — Table of Size Standards (2023). https://www.census.gov/programs-surveys/cbp.html
2. U.S. Census Bureau / NAICS Association — 2022 NAICS Definition, 336411 Aircraft Manufacturing, 2022. https://www.census.gov/naics/?input=336411&year=2022
3. The Boeing Company — Form 10-K (FY2025), 2026. https://www.sec.gov/Archives/edgar/data/12927/000162828026004357/ba-20251231.htm
4. Boeing / Air Data News — Boeing Reports Fourth Quarter and Full-Year 2024 Results, 2025. https://boeing.mediaroom.com/2025-01-28-Boeing-Reports-Fourth-Quarter-Results
5. Quartr / Statista — The Boeing–Airbus Duopoly: 2025 commercial-jet market share, 2025. https://quartr.com/insights/company-research/the-boeing-airbus-duopoly-titans-of-the-skies
6. International Air Transport Association (IATA) — Global Outlook for Air Transport / 2025 air passenger demand and order backlog, 2025–2026. https://www.iata.org/en/pressroom/2026-releases/2026-01-08-02/
7. Oliver Wyman — Global Fleet and MRO Market Forecast 2025–2035, 2025. https://www.oliverwyman.com/our-expertise/insights/2025/feb/global-fleet-and-mro-market-forecast-2025-2035.html
8. The Boeing Company — Boeing Completes Acquisition of Spirit AeroSystems, 2025. https://investors.boeing.com/investors/news/press-release-details/2025/Boeing-Completes-Acquisition-of-Spirit-AeroSystems/default.aspx
9. CNBC / CNN Business — FAA raises Boeing 737 MAX production cap to 42 a month, 2025. https://www.cnbc.com/2025/10/17/boeing-737-max-production.html
10. Lockheed Martin Corporation — Form 10-K (FY2025), 2026. https://www.sec.gov/Archives/edgar/data/936468/000162828026004195/lmt-20251231.htm
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12. Textron Inc. — Form 10-K (FY2025), 2026. https://www.sec.gov/Archives/edgar/data/217346/000021734626000006/txt-20260103.htm
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14. Aerospace Industries Association (AIA) — 2025 Facts & Figures: Aerospace & Defense industry economic contribution and exports, 2025. https://www.aia-aerospace.org/news/american-aerospace-defense-industry-continues-economic-dominance/
15. Airbus — Airbus inaugurates second A320 Final Assembly Line in the U.S. (Mobile, Alabama), 2025. https://www.airbus.com/en/newsroom/press-releases/2025-10-airbus-inaugurates-second-a320-final-assembly-line-in-the-us
16. Aviation Week / The Air Current — Services Lead Boeing Profitability; program accounting explained, 2025–2026. https://aviationweek.com/mro/mro-memo-services-lead-boeing-profitability
17. Holland & Knight / FAA — U.S. Export Controls (ITAR, EAR) and FAA type certification for aircraft, 2008–2024. https://www.faa.gov/about/office_org/headquarters_offices/ast/media/Intro%20to%20US%20Export%20Controls.pdf
18. Breaking Defense — Pentagon's ~$205B FY2026 procurement budget, 2025. https://breakingdefense.com/2025/06/pentagon-procurement-budget-fy26-reconciliation-f35-bombs-f15ex-army-navy-air-force-space-force-trump/
19. CNBC / CompositesWorld — Joby and Archer eVTOL FAA certification progress, 2025–2026. https://www.cnbc.com/2026/01/07/joby-faa-air-taxi-evtol.html
20. Northrop Grumman Corporation — Form 10-K (FY2025), 2026. https://www.sec.gov/Archives/edgar/data/1133421/000113342126000003/noc-20251231.htm
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24. Honda Aircraft Company — Company History. https://www.hondajet.com/en/AboutUs
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32. FAA — FAA Aerospace Forecast FY2026–2046. https://www.faa.gov/data_research/aviation/aerospace_forecasts/FY_2026-2046_Full_Forecast_Document_Tables.pdf
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34. Government Accountability Office — Electric Aircraft: FAA Certification Efforts (GAO-26-107816), March 2026. https://files.gao.gov/reports/GAO-26-107816/index.html
35. National Transportation Safety Board — 737 MAX 9 Door Plug Investigation Final Report, June 2025. https://www-s.ntsb.gov/news/press-releases/Pages/NR20250624.aspx
36. Government Accountability Office — Aerospace Supply Chain: Manufacturers and Suppliers Face Challenges (GAO-24-106493). https://www.gao.gov/products/gao-24-106493