Summa Defence Oyj, a defense and security technology group, focuses on dual-use technologies related to security of supply, situational awareness, mobility, and defense in the civilian, security, and defense sectors. It offers aluminum and steel-hulled vessels, multipurpose machine and equipment solutions, watermaster multi-purpose machines, containers and modular spaces, drone systems, augmented and virtual reality, near-eye displays, and renewable energy solutions for industry, energy companies, and properties. The company was formerly known as Meriaura Group Oyj and changed its name to Summa Defence Oyj in June 2025. Summa Defence Oyj was incorporated in 2024 and is based in Helsinki, Finland.