The aerospace supply chain, 7 layers deep.

LEAP and CFM narrowbody engines for A320 and 737 platforms.

Private: CFM International (GE/Safran JV, not separately listed)

Design and manufacture of jet engine cores and hot-section components.

Private: MTU Aero Engines (MTX.DE), IHI Corporation (7013.T), SpaceX (Raptor full-flow staged-combustion engine, private; dominant in reusable liquid propulsion), Blue Origin (BE-4 LOX/LNG engine, private; sole propulsion for ULA Vulcan Centaur; lunar lander propulsion)

Proprietary and PMA aftermarket parts, MRO services, and components distribution for commercial and defense aircraft.

Private: AAR Corp (AIR), StandardAero (private), Chromalloy (private)

Precision castings and investment casting for engine and airframe components.

Private: Alcoa Forgings & Castings (AA subsidiary), Arcam (GE Additive)

Main and nose landing gear assemblies, shock struts, and actuation systems.

Private: Liebherr-Aerospace (private), Safran Landing Systems (Safran subsidiary)

Specialty fasteners, bolts, and structural components for aircraft assembly.

Private: LISI Aerospace (LII.PA), Stanley Black & Decker (SWK), Wurth Group

Hydraulic fittings, hoses, tubing, and fluid conveyance systems.

Private: Eaton Hydraulics (part of ETN), Ducommun (DCO), Aerocom Fittings

High-precision CNC machining, digital manufacturing, and automated fabrication for aerospace structural and engine components.

Private: Hadrian (private; AI-driven precision CNC manufacturing for aerospace and defense; automated machine shops targeting aerospace Tier 2/3 supply chain; raised ~$200M+ as of 2024)

High-performance carbon fiber and prepreg materials for primary and secondary structures.

Private: SGL Carbon, Mitsubishi Chemical Group (4188.T)

Titanium, aluminum-lithium, and nickel-based superalloys for structural and engine components.

Private: VSMPO-AVISMA (Russian, sanctioned), Alcoa (AA), Kaiser Aluminum (KALU)

Composite matrix materials, advanced polymer systems, and specialty resins.

Private: Solvay (SOLB.BE), Huntsman (HUN), Cytec (now Solvay), Toho Tenax (Teijin subsidiary)

Passenger seating, galleys, lavatories, and cabin management systems.

Private: RECARO Aircraft Seating (private), Adient Aerospace (JV, private), Diehl Aviation (private)

Flight management systems, cockpit displays, and electronic control units.

Private: L3Harris (LHX), BAE Systems (BA.L)

Fuselage sections, wing assemblies, and control surfaces.

Private: Premium AEROTEC (Airbus subsidiary, private), GKN Aerospace (Melrose, private), Leonardo Aerostructures (LDO.MI)

Final assembly and integration of commercial aircraft.

Private: Embraer (ERJ, regional jets only), COMAC (private, China only)

Electric and hybrid-electric vertical takeoff and landing (eVTOL) aircraft for urban air mobility and cargo.

Private: BETA Technologies (private; ALIA fixed-wing eVTOL for cargo and passenger; UPS and United Therapeutics customer; proprietary charging infrastructure network), Wisk Aero (private; Boeing-backed autonomous air taxi; 6th-generation Cora; pursuing FAA Part 135 certification)

Autonomous systems software, AI-enabled C2 platforms, counter-UAS, and drone autonomy stacks for defense.

Private: Anduril Industries (private; Lattice OS C2/sensor-fusion; Ghost-X autonomous interceptor; Roadrunner-M loitering munition; Fury loyal-wingman; raised ~$14B valuation 2024; IPO widely expected 2025-2027), Shield AI (private; Hivemind autonomous pilot flying V-BAT drone and F-16 in contested environments; defense AI pilot software; ~$2.8B valuation 2024), Helsing (private; European defense AI for sensor fusion and EW; German/UK government contracts; growing NATO relevance), Skydio (private; AI-based autonomous drone navigation; US government and DoD contracts for ISR; domestic alternative to DJI)

Military radar systems, electronic warfare suites, and threat detection platforms.

Private: Elbit Systems (ESLT), Hensoldt (HENSG.DE), Leonardo (LDO.MI) DRS, Epirus (private; directed-energy counter-electronics weapon Leonidas; AFWERX and Army contracts), Anduril Industries (private; Lattice OS platform integrates radar/sensor fusion for C-UAS and C2; raised ~$1.5B Series F at ~$14B valuation 2024)

GaN (Gallium Nitride) RF power modules for phased-array radar and electronic warfare.

Private: Qorvo (QRVO), Wolfspeed (WOLF), Analog Devices (ADI), Skyworks Solutions (SWKS)

Forged titanium compressor discs, blades, and casings for aero engines.

Private: Aubert & Duval (Safran subsidiary, private), VSMPO-AVISMA (sanctioned), Precision Castparts/PCC (Berkshire)

Design, assembly, and integration of fighter jets, bombers, and military transport aircraft.

Private: Dassault Aviation (DAS.PA, Rafale), BAE Systems (BA.L, Typhoon/Tempest), Saab (SAAB.ST, Gripen)

Sensor integration, mission systems, and avionics for military platforms.

Private: Elbit Systems (ESLT), DRS Technologies (Leonardo subsidiary)

Hypersonic aircraft, supersonic commercial transport, and advanced propulsion platforms beyond conventional jet speeds.

Private: Hermeus (private; Quarterhorse Mach 5 aircraft for DoD; TF-1 turbine-based combined-cycle engine demonstrated; AFWERX and Air Force contracts), Boom Supersonic (private; Overture Mach 1.7 commercial airliner; Symphony engine self-development; United Airlines and American Airlines orders; viability uncertain given prior engine partner exits), MBDA (private JV of Airbus/BAE/Leonardo; leading European missile systems; Meteor BVR missile, SCALP cruise missile; not separately listed)

Autonomous and semi-autonomous UAS platforms for ISR, strike, maritime patrol, and counter-UAS missions.

Private: Anduril Industries (private; Fury loyal-wingman CCA program; Roadrunner-M recoverable interceptor; Ghost autonomous counter-UAS interceptor), Shield AI (private; V-BAT VTOL UAS for Navy/Marines; Hivemind AI pilot deployed on F-16 in contested comms), Skydio (private; R1 and X2D autonomous drones; DoD Blue UAS listed; ISR missions; domestic alternative to Chinese-made DJI), Saronic Technologies (private; autonomous surface vessels for maritime ISR and patrol; US Navy interest), Saildrone (private; uncrewed surface vehicles for maritime ISR, ocean data, and potential naval patrol; partnerships with NOAA and Navy), Quantum Systems (private; German company; Trinity autonomous ISR drones for European armed forces and NATO)

Orbital launch vehicles, intercontinental ballistic missiles, and space transportation systems.

Private: SpaceX (private, dominant commercial and national-security launch provider; Falcon 9/Heavy + Starship; no credible IPO timeline), Blue Origin (private, New Glenn operational; BE-4 engine supplies ULA Vulcan; Blue Moon lunar lander under NASA contract), ULA (LMT/BA JV, private), Firefly Aerospace (private; Alpha small launch, Blue Ghost lunar lander successful 2025; IPO speculation but still private as of 2026), Stoke Space (private; fully reusable NOVA vehicle in development), ABL Space Systems (private; RS1 small launch, paused operations 2023; viability uncertain), Relativity Space (private; 3D-printed Terran R in development; pivoted from Terran 1)

Satellite bus design, propulsion, power systems, and bus integration.

Private: MDA Ltd/Maxar (MAXR, taken private 2023), Surrey Satellite Technology (Airbus subsidiary), Sierra Space (private; Dream Chaser spaceplane and inflatable LIFE habitat for Orbital Reef; NASA contract), Vast (private; Haven-1 commercial space station, SpaceX partner), Axiom Space (private; ISS commercial modules, NASA astronaut missions), Astranis (private; small-GEO satellites for broadband connectivity in developing markets), K2 Space (private; large-bus GEO platforms targeting national-security missions)

Ground stations, satellite control systems, telemetry infrastructure, and satellite communications services.

Private: Viasat (VSAT), Trimble (TRMB), Kratos Defense (KTOS)

Ground stations, satellite control systems, and telemetry infrastructure.

Private: Viasat (VSAT), Iridium (IRDM), Trimble (TRMB), Kratos Defense (KTOS)

Orbital transfer, in-space manufacturing, space station habitation, and on-orbit services.

Private: Impulse Space (private; Mira and Helios orbital transfer vehicles; founded by Tom Mueller, SpaceX Propulsion co-founder; targeting LEO-to-GEO delivery), Varda Space Industries (private; in-space pharmaceutical and materials manufacturing using microgravity; W-series reentry capsule; parabolic drug crystallization in orbit), Vast (private; Haven-1 commercial space station launching 2025 on Falcon 9; partnered with SpaceX for Crew Dragon dockings), Axiom Space (private; commercial ISS module Axiom Station Node 1 approved; private astronaut missions to ISS)