American manufacturer of precision motion-control, actuation, fluid-control and related systems.
Last updated August 31, 2026
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Overview
Moog Inc. is an American engineering and manufacturing company whose products control motion, force, pressure and position in demanding applications. Its principal technologies include electric, electro-hydraulic and hydraulic actuators; servo valves; flight-control systems; avionics; motion-control electronics; components for spacecraft and satellites; and industrial and medical equipment. The company serves aerospace, defense, space, industrial and selected medical-device markets, generally supplying original equipment manufacturers, government agencies and major prime contractors rather than selling primarily through consumer channels. The company originated in western New York in 1951, when William C. Moog, his brother Art Moog and engineer Lou Geyer founded Moog Valve Company. William Moog had previously worked at Cornell Aeronautical Laboratory and had developed an electrohydraulic servo valve, a technology that enabled highly precise control of hydraulic actuators. The valve initially addressed guided-missile requirements, but its applications soon expanded to aircraft, spacecraft, industrial machinery and other systems in which accurate and reliable movement was essential. Moog developed from a specialist valve maker into a broader controls supplier during the 1960s through the 1980s. It added flight-control systems and actuators, entered commercial-aircraft and industrial markets, and established international engineering and manufacturing operations. The company changed its name to Moog Inc. in 1965 and completed a listing on the American Stock Exchange that year. The end of the Cold War reduced defense procurement and created pressure for diversification. During the 1990s, Moog acquired actuation, servo-control and industrial-control businesses from companies including AlliedSignal, Ultra Hydraulics, International Motion Control and Raytheon Aircraft. These transactions broadened its product range and reduced dependence on a single defense cycle. By the end of the decade, its activities were organized around aircraft controls, satellite and launch-vehicle controls, and industrial controls. In the 2000s, Moog expanded through major programs and acquisitions. Its work on the Joint Strike Fighter, later the Lockheed Martin F-35 Lightning II, became the company’s largest program. The purchase of Poly-Scientific from Northrop Grumman added slip rings, fiber-optic rotary joints and motors, while acquisitions in medical devices added pumps, sensors, disposables and related technologies. The acquisition of GE Aviation’s flight-control actuation business in Wolverhampton, United Kingdom, strengthened Moog’s position on military-aircraft programs including the Eurofighter Typhoon and the short-takeoff-and-vertical-landing version of the F-35. During the 2010s, Moog added capabilities in surveillance, security and medical devices but later narrowed its portfolio. From 2016 through 2019, it divested or discontinued several non-core activities and consolidated its structure around aerospace, space and defense, and industrial controls. The company also benefited from long-running production programs, especially the F-35, as well as demand for satellite, launch-vehicle, missile, naval and surveillance systems. The COVID-19 pandemic weakened commercial aviation and industrial demand, but military, space and defense work partly offset the decline. Moog acquired Genesys Aerosystems in 2020, adding avionics, electronic flight instruments and autopilot products. In the 2020s, rising defense spending and recovery in commercial aviation supported growth, while the company faced increased scrutiny concerning government contracting, anti-corruption compliance and the end use of components supplied for military platforms. The company’s modern business is organized across Military Aircraft, Space and Defense, Commercial Aircraft and Industrial activities, with operations and customers in numerous countries.
History
Moog’s history began with a precision-control invention rather than with a broad aerospace product portfolio. In April 1950, William C. Moog applied for a patent covering an electrohydraulic servo valve. The device regulated hydraulic pressure with sufficient accuracy to control actuators in guided missiles and other demanding systems. The patent was issued in January 1953. In July 1951, William Moog, his brother Art and Cornell Aeronautical Laboratory engineer Lou Geyer pooled approximately $3,000 to establish Moog Valve Company. The early operation occupied a modest area in an airplane hangar in East Aurora, New York, and had only a small number of prospective customers. The servo valve gave the young company a specialized entry into aerospace and defense. Its technology translated electrical commands into finely controlled hydraulic movement, making it useful in flight controls, missile systems, test equipment and industrial machinery. In 1959, the business made an initial public offering under the name Moog Servocontrols Inc. In 1965, shareholders approved a name change to Moog Inc. and the company completed a listing on the American Stock Exchange. During the 1960s, 1970s and 1980s, Moog moved beyond stand-alone valves. It developed complete actuation and flight-control solutions for commercial and military aircraft, industrial machinery, spacecraft and launch vehicles. International expansion created subsidiaries and production or engineering locations in the United Kingdom, Germany and Japan. This broader capability allowed Moog to participate in both development programs and long-lived production platforms. The post-Cold War reduction in U.S. defense spending was a major test. Between 1990 and 1994, revenue growth was limited, and management used acquisitions to offset weaker organic demand. The company bought the hydraulic and mechanical actuation product lines of AlliedSignal in 1994, the servovalve product line of Ultra Hydraulics in 1995 and the industrial hydraulic servocontrol business of International Motion Control in 1996. In 1998, it acquired Raytheon Aircraft Montek, adding flight controls for commercial, regional and business aircraft as well as missile and servo-valve activities. Hydrolux and Microset further expanded industrial hydraulic and electronic controls. By the end of the 1990s, Moog had three principal divisions and a significantly more diversified customer base. The 2000s brought another period of expansion. Moog worked with Boeing and Lockheed Martin on the Joint Strike Fighter, which became the F-35 Lightning II and ultimately the company’s largest program. In 2004, the acquisition of Poly-Scientific from Northrop Grumman added components such as slip rings, fiber-optic rotary joints and motors, leading to a Components Division. Acquisitions of Curlin Medical and McKinley Medical established a Medical Devices Division, later expanded through Ethox International and Aitecs. Moog also purchased GE Aviation’s flight-control actuation business in Wolverhampton, strengthening its position on the Eurofighter Typhoon and F-35 vertical-lift propulsion-related systems. In the 2010s, Moog continued to add businesses in surveillance, security and medical technology, but later returned its center of gravity to aerospace and defense. Between 2016 and 2019, it divested portions of the Medical Devices, Components and Industrial businesses and simplified its organization. The resulting structure emphasized Aircraft Controls, Space and Defense Controls and Industrial Systems. At the same time, long-running military and commercial aircraft programs, including the F-35, supported production growth, while space and defense activities broadened across satellites, launch vehicles, precision-guided weapons, naval systems and surveillance. The pandemic caused a sharp contraction in commercial aviation and affected industrial markets. Moog reported only a limited overall sales decline in 2020 because military-aircraft and space-and-defense demand partly compensated for weakness elsewhere. The acquisition of Genesys Aerosystems in December 2020 expanded its avionics and autopilot portfolio. Later recovery in commercial aviation and higher defense spending supported renewed expansion. In the 2020s, Moog also encountered governance and public-policy challenges. The appointment of Pat Roche as chief executive in 2023 led to a security-clearance issue involving U.S. defense-contracting requirements; the company responded by restructuring its aircraft-controls activities into separately managed Military Aircraft and Commercial Aircraft businesses. In 2024, the SEC announced a Foreign Corrupt Practices Act settlement involving Moog. Separately, public campaigners and media organizations scrutinized the company’s role as a supplier of components used on military aircraft operated by Israel. These issues illustrate the tension between Moog’s role as a specialized component supplier and the political and legal scrutiny surrounding defense supply chains.
- 2024
SEC FCPA settlement
[1]Moog agreed to resolve SEC allegations concerning Foreign Corrupt Practices Act compliance.
- 2023
Pat Roche becomes chief executive
[1]Pat Roche was appointed chief executive officer after leading the Industrial Division.
- 2020
Genesys Aerosystems acquired
[1]Moog acquired Genesys Aerosystems to expand avionics, flight instruments and autopilot products.
- 2006
Medical Devices Division established
[1]Acquisitions including Curlin Medical and McKinley Medical created a dedicated medical-devices activity.
- 2004
Poly-Scientific acquisition
[1]The acquisition of Poly-Scientific added components including slip rings, fiber-optic rotary joints and motors.
- 2000
Joint Strike Fighter participation
[1]Moog began work with Boeing and Lockheed Martin on the Joint Strike Fighter program, later known as the F-35.
- 1994
AlliedSignal actuation acquisition
[1]Moog acquired AlliedSignal’s hydraulic and mechanical actuation product lines.
- 1965
Name change and stock-market listing
[1]The company adopted the name Moog Inc. and completed a listing on the American Stock Exchange.
- 1959
Initial public offering
[1]The company made an initial public offering under the name Moog Servocontrols Inc.
- 1953
Servo-valve patent issued
[1]The U.S. patent for the electrohydraulic servo valve was issued.
Products and positioning
A high-reliability, engineering-led supplier of precision motion and fluid-control technologies for safety-critical and performance-critical applications.
Fluid control
Servo valves
Moog’s servo valves regulate hydraulic flow and pressure with high precision. They convert control signals into finely measured hydraulic action and are used in aircraft, missiles, industrial machinery, test systems and other applications requiring accurate control of force, position or velocity.
Aerospace actuation
Aircraft flight-control actuation systems
These systems move primary and secondary flight-control surfaces and may combine hydraulic or electric actuators, control electronics, sensors and associated mechanisms. Moog supplies systems and components for military and commercial aircraft programs, including the F-35, F-16, F-15, Eurofighter Typhoon and other platforms.
Space systems
Space and launch-vehicle controls
Moog provides valves, actuators, mechanisms, control electronics and related systems for satellites, launch vehicles and space-defense applications. The products are designed for precise operation under demanding vibration, temperature, reliability and mission-life requirements.
Avionics · 2020
Avionics and autopilot systems
Following the acquisition of Genesys Aerosystems, Moog’s portfolio includes electronic flight-instrument systems, avionics and autopilot solutions for aircraft. These products support navigation, flight management and automatic aircraft control in military, commercial and special-mission applications.
Industrial automation
Industrial motion-control systems
Moog’s industrial products control position, velocity and force in machinery and production equipment. The portfolio includes servo valves, hydraulic power-control systems, electronic controls, electric motors and integrated motion solutions for applications such as plastics, metal forming, simulation and energy equipment.
Aerospace and industrial components · 2004
Components
Moog manufactures specialized components such as slip rings, fiber-optic rotary joints, motors and related electromechanical products. These components transmit power, signals or data across rotating interfaces and serve aerospace, defense, industrial and medical applications.
Medical devices · 2006
Medical pumps and devices
Moog has supplied infusion pumps, sensors, disposables and related medical-device technologies through businesses developed in the 2000s. Some non-core medical activities were later divested or reduced as the company refocused on aerospace, defense and industrial controls.
Controversies
2025
Protests concerning military supply-chain relationships
Protesters and campaigners criticized Moog’s supply of components used on military aircraft associated with Israel, including the F-35 and M-346. The issue concerned the end use of products supplied as part of broader aircraft programs.
2024
Foreign Corrupt Practices Act settlement
Moog agreed to a settlement with the U.S. Securities and Exchange Commission concerning alleged breaches of the Foreign Corrupt Practices Act. The matter brought compliance controls and international business conduct into public focus.
2021
Moog workers walk out to protest vaccine mandate
Hundreds of workers walked off the job at Moog's Elma facility to protest the federal vaccine mandate. Workers said they opposed being required to get vaccinated to keep their jobs; the article reports that Moog had defense contracts requiring compliance with the mandate.
Brand decisions
2023
Reorganization of aircraft-controls activitiesStrategyBackground
A security-clearance issue followed the appointment of chief executive Pat Roche and affected access to certain U.S. government contracts requiring facility security clearance.
Action taken
Moog separated Aircraft Controls into independently managed Military Aircraft and Commercial Aircraft divisions, with management arrangements intended to address government-security requirements.
Aftermath
The company reported four operating segments: Military Aircraft, Space and Defense, Commercial Aircraft and Industrial.
2016
Refocusing and portfolio simplificationStrategyBackground
Moog had expanded into medical devices, components and other adjacent activities but sought to concentrate on businesses closer to its traditional motion-control strengths.
Action taken
Between 2016 and 2019, the company divested or exited selected non-core businesses and consolidated its organization around aerospace, space and defense, and industrial controls.
Aftermath
The company returned to a simpler structure centered on Aircraft Controls, Space and Defense Controls and Industrial Systems.
2000
Commitment to the Joint Strike Fighter programStrategyBackground
Moog sought participation in the next generation of U.S. military aircraft while expanding its role from component supplier toward major flight-control and actuation programs.
Action taken
The company worked with Boeing and Lockheed Martin on the Joint Strike Fighter, which became the F-35 Lightning II.
Aftermath
The F-35 became Moog’s largest program and a long-term driver of its military-aircraft business.
Recent events
Reported
Moog workers walk out to protest vaccine mandate[3]
Hundreds of workers walked off the job at Moog's Elma facility to protest the federal vaccine mandate. Workers said they opposed being required to get vaccinated to keep their jobs; the article reports that Moog had defense contracts requiring compliance with the mandate.
Reported
Moog acquires Genesys Aerosystems[4]
Moog purchased Genesys Aerosystems on December 18, 2020. Genesys said it would remain at its existing locations and continue doing business under its name as part of Moog’s Aircraft Controls segment.
Reported
Moog announces Claravox Centennial theremin[5]
Moog announced the Claravox Centennial theremin, which was available for pre-order and expected to ship in December.
Sources6 sources
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