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BAE Systems plc is a British multinational arms, security, and aerospace company based in London, England. It is the largest defence contractor in Europe, and ranked the seventh-largest in the world based on applicable 2021 revenues. As of 2017, it is the biggest manufacturer in Britain.

Collins Aerospace is an American technology corporation that is one of the world’s largest suppliers of aerospace and defense products. Headquartered in Charlotte, North Carolina, it is a subsidiary of Raytheon Technologies.

L3Harris Technologies (L3Harris) is an American technology company, defense contractor, and information technology services provider that produces C6ISR systems and products, wireless equipment, tactical radios, avionics and electronic systems, night vision equipment, and both terrestrial and spaceborne antennas for use in the government, defense, and commercial sectors. They specialize in surveillance solutions, microwave weaponry, and electronic warfare.

The Lockheed Martin Corporation is an American aerospace, arms, defense, information security, and technology corporation with worldwide interests. It was formed by the merger of Lockheed Corporation with Martin Marietta in March 1995. It is headquartered in North Bethesda, Maryland, in the Washington, D.C. area.

Pratt & Whitney is an American aerospace manufacturer with global service operations. It is a subsidiary of Raytheon Technologies. Pratt & Whitney’s aircraft engines are widely used in both civil aviation and military aviation. Its headquarters are in East Hartford, Connecticut.

Patria Plc is a Finnish provider of defence, security and aviation life-cycle support services. Patria is owned 50.1% by the Finnish government and 49.9% by Norwegian defense group Kongsberg Defense & Aerospace AS.

Ansys, Inc. is an American multinational company with its headquarters based in Canonsburg, Pennsylvania. It develops and markets CAE/multiphysics engineering simulation software for product design, testing and operation and offers its products and services to customers worldwide.

Raytheon Technologies Corporation is an American multinational aerospace and defense conglomerate headquartered in Arlington, Virginia; it is one of the largest aerospace and defense manufacturers in the world by revenue and market capitalization as well as one of the largest providers of intelligence services.

Singapore Technologies Engineering Ltd, doing business as ST Engineering, is a Singaporean multinational technology and engineering group in the aerospace, smart city as well as defence and public security sectors.