Moog Inc. ( ) is an American-based designer and manufacturer of electric, electro-hydraulic and hydraulic motion, controls and systems for applications in aerospace, defense, industrial and medical devices. The company operates under four segments: aircraft controls, space and defense controls, industrial controls, and components. Moog is headquartered in Elma, New York, and has sales, engineering, and manufacturing facilities in twenty-six countries.

thumb|A Moog Inc. manufacturing plant in [[Peachtree, North Carolina]]

History

Bill Moog

In April 1950 Bill Moog (cousin of Robert Moog, inventor of the Moog synthesizer) applied for a patent for the electrohydraulic servo valve (later called a "Moog Valve"), a device to control hydraulic pressure for fine control of actuators. The US patent 2625136 was issued in January 1953.

Notable projects

Moog provided products and technologies that were used on the B-2 Bomber and were also responsible for the flight control actuation system. Moog also contributed to the manufacture and development of both hydraulic and electric flight simulators, being the industry leader in Level D simulators. Moog's design was adapted to form the Spider-Man ride at Universal Studios adventure theme park. Moog also worked on several space contracts and designed part of the liquid rocket engine propulsion systems on the Voyager space probes and provided thruster valves that steered the spacecraft. Moog also made servo-actuators for four Space Shuttles.

Moog provided a control and motion system for the Wimbledon Centre Court retracting roof. This consisted of about 150 axes of AC servo-controlled electric actuators, AC servomotors, AC servodrives and the complete motion control system, including software. It was engineered by Moog's UK facility and enabled the Centre Court's only night-time tennis performance. Moog also provided a similar system for the No1 Court at Wimbledon.

Moog initiated an effort along with other aerospace suppliers to explore the application of blockchain technology in their supply chain. They developed the Moog VeriPart blockchain to track parts through the design, manufacturing, and service process. They have partnered with Aion Network in developing their blockchain.

In 2018, Moog and the University at Buffalo announced a project to use machine learning algorithms to differentiate acceptable from non-conforming areas of metal parts produced using additive manufacturing techniques. Areas considered improperly welded are identified from images evaluated by a convolutional neural network.

Moog also has notable track record of providing a range of control axes on Formula 1 racing cars and has been involved in this business for over 30 years. The technologies provide extremely high power:weight ratio and provide actuation for up to 10 axes on each car.

In 2019, Moog acquired the SureFly electric vertical takeoff and landing aircraft along with its related hybrid electric power system technology from Workhorse Group Inc. The acquisition was driven by an interest in electric power systems and was a step towards developing electric aircraft technology.

Aircraft controls

<!-- Image with unknown copyright status removed: right|thumb|Boeing 777 Aircraft -->

The company's largest segment is aircraft controls, which generates revenues from military and commercial aircraft in addition to aftermarket support.

  • Embraer E-Jet E2 family Flight Control Computers and Primary Flight Control System
  • Airbus A350 Primary and Secondary Flight Control Systems and Components
  • Boeing 787 Dreamliner Primary Flight Control System
  • Airbus A400M Atlas Primary Flight Controls
  • Alenia Aermacchi M-346 Master Primary Flight Control Actuation System
  • Lockheed Martin F-35 Lightning II Primary Flight Controls

Missile systems

Moog develops missile guidance, flight control, actuation, propulsion, avionics, and navigation technologies for tactical missiles, hypersonic weapons, ballistic missiles, and air and missile defence systems.

According to company materials, Moog has supplied missile control technologies since 1951 and produces electrohydraulic, electromechanical, electropneumatic, and electrohydrostatic actuation systems for missile applications.

Space systems

Moog develops technologies for satellites, launch vehicles, and spaceflight systems, including propulsion systems, steering and motion controls, couplings, valves, and actuators.

The company has supplied systems and components for the Apollo program, the Space Shuttle, the International Space Station, Deep Space 1, Gravity Probe B, the Space Launch System, and Artemis I.

Moog has also supplied components for the Atlas V launch vehicle operated by United Launch Alliance, and for the Boeing 2707 supersonic transport programme.

In 2012, Moog acquired the In-Space Propulsion (ISP) business of American Pacific Corporation (AMPAC), formerly part of Atlantic Research Corporation (ARC). Products included the LEROS family of liquid-propellant thrusters, originally developed by Royal Ordnance in the United Kingdom. Moog operated a manufacturing facility at Westcott, Buckinghamshire until 2017, when the ISP business was acquired by Nammo.

Industrial

Moog provides industrial services. For the plastics and machinery market Moog designs, manufactures and integrates systems for all axes of injection and blow molding machines using both hydraulic and electric technology. In the power generation turbine market, Moog designs, manufactures and integrates control assemblies for fuel, steam and variable geometry control applications that include wind turbines. Metal forming markets use Moog designed and manufactured systems that provide control of position, velocity, force and other parameters. Heavy industry uses Moog's electrical and hydraulic servovalves for steel and aluminum mill equipment. For the material test markets, Moog supplies controls for automotive, structural and fatigue testing. The company's hydraulic and electromechanical motion simulation bases are used for the flight simulation and training markets. Other markets include material handling and testing, motorsport (including F1), carpet tufting, paper and lumber mills.

Components

Moog markets medical equipment components. As a result of the acquisition of the Power and Data Technologies Group of the Kaydon Corporation in July 2005, Moog entered into the market of marine applications. Components has several other product lines that include the design and manufacture of electromechanical actuators, fiber optic modems, avionic instrumentation, optical switches and resolvers.

In 2019, Moog introduced a new project that intends to use a unique model based on block-chain and 3D printer to produce airplane parts, on demand.

Medical devices

Medical devices is Moog's newest segment, formed as a result of the acquisition of Curlin Medical, McKinley Medical, and Zevex International in 2006. Moog's primary products are electronic ambulatory infusion pumps and ambulatory enteral feeding pumps along with the necessary administration sets as well as disposable infusion pumps. Applications of these products include controlled delivery of fluids to the body, nutrition, post-operative pain management, regional anesthesia, chemotherapy and antibiotics. On January 23, 2009 Moog acquired the stock of Ethox International for $15.2 million in cash. Ethox is a medical products manufacturer and service provider based in Buffalo, New York.

On July 1, 2013, Moog announced the sale of its Buffalo operations of Ethox Medical to Dempsey Ventures. Annual sales from this division were approximately $12 million, with 88 full-time employees. Dempsey Ventures, based in Grand Rapids, Michigan, is a private equity firm focused on healthcare products. Its portfolio of companies in the anesthesia/respiratory space includes SunMed, Bay Medical and Ventlab. The Company also announced that it has engaged RBC Capital Markets LLC to assist with the strategic assessment of the remainder of its Medical Devices segment, including the possibility of divesting the entire segment.

In 2016 the remainder of Moog's medical devices segment was integrated into the components group.

Moog Navigation and Surveillance Systems (NaSS) was established in 1955 and registered its first Tactical Air Navigation (TACAN) patents in 1962. That was the beginning of a long TACAN history. Since that time, Moog has designed and manufactured TACAN systems for use by militaries around the world including systems for fixed site, shipboard, mobile and man portable applications.

In 2009, Moog added engineering expertise as well as Distance Measuring Equipment (DME) and Direction Finding (DF) products through the acquisition of Fernau Avionics, Ltd.

In 2021, Moog sold the complete Navigation Aids (Navaids) business to Thales Group. At that moment the Navaids business represented less than 1% of Moog Inc.’s annual sales.

FCPA charges and settlement

In October 2024, the U.S. Securities and Exchange Commission announced that Moog Inc. had agreed to settle charges under the U.S. Foreign Corrupt Practices Act (FCPA) relating to conduct by its wholly owned Indian subsidiary, Moog Motion Controls Private Limited. According to the SEC, between 2020 and 2022 employees of the subsidiary paid bribes to Indian government officials to secure business and influence public tenders, including through the use of third-party agents and distributors.

According to the SEC, Moog Motion Control (MMCPL) had a "prevailing culture to win business at any cost, including improper means. The widespread misconduct at MMCPL reflected a breakdown in internal accounting controls, training, compliance, and tone at the top of the subsidiary."

Moog has referenced Transparency International indices in its own sustainability disclosures.

Injunction against protest activity

In September and October 2025, Moog obtained a High Court injunction against “persons unknown” in relation to protest activity at its United Kingdom sites.

Press reports and witness statements linked the protests to allegations regarding Moog's involvement in Israel's F-35 and M-346 programs. In her witness statement to the High Court, Elwira Kelly, Moog's General Counsel, stated that she does "not accept the characterisation of Moog's business activities in the article."

The injunction restricted trespass, obstruction of access, and interference with operations at several facilities.

Statements from the Belgian government and media reports linked one of the seized shipments to Moog's Wolverhampton facility and specifically to Israel's M-346 program, although the investigation was ongoing at the time of reporting.

Private Eye allegations

In May 2026, UK investigative newspaper Private Eye published allegations that, subsequent to the April 2026 seizures in Liège Airport, Moog's Wolverhampton facility continued to ship M-346 components to Israel along flight paths that overflew Belgian airspace, in apparent breach of the 16 January 2026 Royal Decree prohibiting use of Belgian airspace for any flights containing military materiel for use by the Israeli armed forces.

Private Eye also alleges that Moog Wolverhampton obtained a new Open export licence from the UK Export Joint Control Unit in November 2025, which would imply that Moog's application for the licence was live at the same time as the M-346 shipments that are now under criminal investigation by the Belgian authorities.