The Aerospace & Defense supply chain, 7 layers deep.

LEAP and CFM narrowbody engines for A320 and 737 platforms.

CFM LEAP dominates narrowbody with ~70% share of new orders. RTX P&W GTF is the alternative for A320neo family (~30% share). Boeing 737 MAX is LEAP-only. Massive backlog of 10,000+ LEAP orders drives the 2.1x demand multiplier. Concentration score of 92 reflects effective duopoly between CFM and P&W.

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

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

GE Aerospace, Pratt & Whitney (RTX), Rolls-Royce, and Safran (SAF.PA) control ~97% of the commercial aero-engine market by deliveries. CFM International (GE/Safran JV) is the dominant narrowbody player with LEAP. GE retains NYSE:GE ticker post-April 2024 split from GE Vernova (GEV). In the space propulsion segment, SpaceX Raptor (highest chamber pressure of any flight-rated engine) and Blue Origin BE-4 (sole ULA Vulcan supplier) define the new propulsion frontier outside commercial aviation.

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.

TransDigm (TDG) and HEICO (HEI) dominate the US aftermarket aerospace components market. TDG has a portfolio of 70,000+ proprietary parts with effective sole-source pricing power. HEI's Flight Support Group specializes in FAA-approved PMA parts undercutting OEM prices. NOTE: Original v2 draft had this as 'aircraft-tires' with no public dominantPlayers — corrected to the materially more relevant aftermarket components layer. Aircraft tire market (Michelin, Goodyear, Bridgestone) has no dominant public-company player.

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

Precision castings and investment casting for engine and airframe components.

PCC (Precision Castparts, Berkshire Hathaway subsidiary since January 2016) and HWM (Howmet Aerospace) dominate precision investment castings for aerospace. High capital intensity and multi-year aerospace qualification requirements limit competition. PCC is the world's largest supplier of complex metal components for aircraft engines and airframe structures.

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

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

Safran Landing Systems and Collins Aerospace (RTX) dominate large commercial landing gear (A320/A330/A350/787). Héroux-Devtek (HRX.TO, Toronto Stock Exchange) is a major player in business jets and military (F-35 nose gear sole supplier). Sumitomo Precision Products (6355.T, TSE) supplies heat exchangers and hydraulic components. Concentration score 85 reflects ~85% of commercial large-aircraft gear split between Safran and UTC/Collins (Liebherr takes niche).

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

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

Howmet Aerospace (HWM) and Precision Castparts (PCC, Berkshire Hathaway subsidiary since 2016) are the primary suppliers of high-end aerospace fasteners. Howmet has a near-monopoly on certain engine fasteners (titanium and nickel-alloy Hi-Loks).

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

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

Parker Hannifin (PH) and Eaton (ETN) are the dominant suppliers of hydraulic and fluid conveyance systems to aerospace OEMs and Tier 1 suppliers. Parker's Aerospace Group covers actuation, fuel, hydraulics, and pneumatics across all major platforms.

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.

Hexcel (HXL) and Toray (3402.T) dominate the high-performance aerospace grade carbon fiber market. Toray is the sole supplier for the Boeing 787 wing and fuselage structures. Teijin (3401.T) is major alternative. Concentration score 88 supported by Hexcel+Toray combined ~70% of aerospace-grade prepreg market (Hexcel 2025 10-K; Toray 2025 Annual Report).

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

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

ATI and Carpenter (CRS) are critical for titanium and nickel superalloys used in jet engine hot sections. Constellium (CSTM) leads in advanced aluminum-lithium alloys for fuselage skins (A350, A220, 787). NOTE: CSTM belongs in this alloys layer (aluminum-Li) but NOT in the titanium-forgings layer (see C-08 correction). VSMPO-AVISMA (Russia's dominant titanium producer) is effectively sanctioned out of Western supply chains post-2022, boosting ATI and CRS pricing power.

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.

Collins Aerospace (RTX) and Honeywell (HON) are the leaders in commercial avionics. Thales (HO.PA) strong in widebody (IMA on A380/A350). Garmin (GRMN) dominates general aviation and is growing in the business jet segment (G5000/G7500 suites).

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

Fuselage sections, wing assemblies, and control surfaces.

Spirit AeroSystems (SPR) is the primary Tier 1 aerostructures supplier for Boeing (737 MAX fuselage sole-source) and a major supplier for Airbus A220. Boeing announced re-acquisition of SPR's Wichita operations (2025). Latécoère (LDG.PA) supplies fuselage panels and wiring to Airbus.

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.

Public eVTOL players: Joby Aviation (JOBY), Archer Aviation (ACHR), and Lilium (LILM.O, relaunched post-bankruptcy). BETA Technologies is the most differentiated private player — fixed-wing efficiency and a proprietary charging network give it a different cost structure than tilt-rotor eVTOLs. Wisk Aero (Boeing-backed) is pursuing autonomous air taxi, which is strategically distinct from piloted eVTOL. Concentration score 35 reflects early market with no dominant player and regulatory uncertainty (FAA certification backlog). Note: Joby (JOBY) and Archer (ACHR) are already public — do NOT add as privatePeers.

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.

RTX Raytheon Intelligence & Space (SPY-6 AESA radar, AN/APG-79), Northrop Grumman (AN/APG-81 for F-35, airborne AESA), and L3Harris (EW suites, JTRS radios) dominate military radar and EW. GD retained for C4ISR ground radar integration. Anduril's Lattice OS is becoming a real C2/sensor-fusion software layer on top of existing hardware — IPO widely expected in 2025-2026. Epirus directed-energy is a pre-revenue watch; Army Indirect Fire Protection Capability contract gives it program-of-record exposure.

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.

CORRECTED: GE removed (C-01) — GE Aerospace makes jet engines, not GaN RF chips. RTX and LHX retained as system integrators that design GaN T/R modules for their own AESA programs. MACOM Technology Solutions (MTSI) added as the key merchant GaN-on-SiC PA module vendor supplying defense primes. MACOM has documented supply to Raytheon SPY-6 and NGJ programs. Qorvo and Wolfspeed supply wafers/die. Concentration score lowered to 65 (was 68) reflecting the emerging multi-supplier market.

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

Defense software, data platforms and C4ISR integration.

Software-defined defense: mission software and systems integration, distinct from platform primes.

Autonomous systems, drones and counter-UAS.

Fast-growing uncrewed and autonomy tier; several US-listed names plus large private primes (Anduril).

Defense electronics, sensors and electronic warfare.

Sensing, EW and mission electronics; the modern-electronics tier of defense.

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

Titanium forging for compressor stages is a critical chokepoint. ATI supplies GE Aerospace and Rolls-Royce. CRS supplies RTX (P&W). High temperature capability essential. CSTM removed from this layer (correction C-08) — Constellium makes aluminum, not titanium. With VSMPO-AVISMA sanctioned, Western suppliers (ATI, CRS, PCC) face structurally tighter markets through 2027.

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

Orbital and small launch vehicles.

Launch is dominated by private SpaceX; US-listed names serve small-launch and responsive-launch niches.

Satellites, buses and spacecraft components.

Spacecraft manufacturing and components; a mix of scaled and emerging US-listed suppliers.

Satellite communications and connectivity networks.

Direct-to-device and broadband constellations; capital-intensive, several pre-profit.

Earth observation and geospatial intelligence.

Imaging constellations and analytics; downstream demand tier of the space economy.

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

CORRECTED: GD removed (C-07). General Dynamics does NOT make fighter jets — the F-16 production line transferred to Lockheed Martin in 1993 and GD's aerospace unit is now Gulfstream business jets. LMT (F-35, F-22, F-16 production), NOC (B-21 Raider bomber, E-2D Hawkeye), BA (F/A-18E/F Super Hornet, P-8 Poseidon) are the three US military aircraft primes. Concentration among these three for US government prime contracts is ~94%.

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.

Sensor integration and mission systems for modern fighters: RTX Collins Aerospace (F-35 display management, aircraft survivability), L3Harris (JTRS radios, EW, targeting pods), BAE Systems (F-35 electronic warfare suite EW-1, Typhoon sensors), NOC (APG-81 for F-35B/C, LITENING pods). High-reliability military avionics required; long qualification cycles.

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.

CORRECTED: TXT removed (C-06). Textron does not build satellite buses. LMT (A2100 GEO bus, GPS III), NOC (GEOStar, EStar bus), RTX (legacy SSL assets). Maxar taken private under MDA Ltd 2023. Sierra Space and Axiom Space are the two leading commercial space-station contenders under NASA's CLD program. K2 Space targeting large-bus national-security GEO (potential IPO candidate as NatSec space budget grows). Astranis has niche viability for regional broadband GEO.

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.

Nascent layer with no dominant public-company players in pure-play in-space services. NOC and LMT participate via government programs (Orion, satellite servicing), but the commercial opportunity is dominated by privates. Impulse Space is the highest-conviction orbital-transfer play given Tom Mueller's propulsion pedigree and demonstrated Mira vehicle. Varda Space is speculative but unique — if in-space pharmaceutical manufacturing proves viable, it creates an entirely new market with near-zero competition. Axiom Space has the clearest near-term revenue path via private astronaut flights ($55M/seat to ISS). Concentration score 30 reflects genuine market immaturity.

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)