Lockheed Martin's $3.45B Ultra Maritime Acquisition Deepens Undersea Warfare Portfolio

For defense contractors, the world's oceans are becoming the next contested domain. Lockheed Martin's $3.45 billion acquisition of Ultra Maritime underscores the military's growing appetite for advanced undersea warfare systems. As NATO navies face a resurgent submarine arms race, this deal positions Lockheed at the heart of a critical modernization wave.

Lockheed Martin Corp. has struck a $3.45 billion definitive agreement to acquire Ultra Maritime, the undersea warfare technology specialist carved out of Ultra Electronics by private equity firm Advent International. The deal, announced on July 6, 2026, is the defense giant’s largest naval-focused acquisition in years and signals a determined push into the growing anti-submarine warfare (ASW) market as Western navies scramble to counter increasingly sophisticated undersea threats.

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Lockheed Martin's $3.45 billion acquisition of Ultra Maritime underscores the military's growing appetite for advanced undersea warfare systems.

The acquisition comes as global submarine fleets expand and navies invest heavily in sea-based deterrence. China’s rapidly modernizing submarine force and Russia’s proliferation of quiet diesel-electric subs have heightened demand for acoustic sensing, torpedo defense, and unmanned ASW capabilities. NATO allies are accelerating procurement of sonobuoys—expendable sensors dropped from aircraft to detect submarines—a market where Ultra Maritime has become a leading independent supplier. By bringing this capability in-house, Lockheed aims to offer more integrated and resilient naval combat systems.

Since Advent carved out Ultra Maritime following its 2022 purchase of Ultra Electronics, the firm has been transformed into a focused ASW platform. Advent invested approximately $170 million into product development and manufacturing, expanding sonobuoy production capacity and strengthening supply chain resilience. Annual revenue has grown roughly 17% per year, reflecting rising global orders. The company also forged partnerships with cutting-edge defense tech firms Anduril Industries and General Atomics Aeronautical Systems to integrate autonomous ocean sensing and unmanned airborne ASW capabilities, signaling the increasing role of AI-driven systems in naval warfare.

For Lockheed Martin, Ultra Maritime brings a portfolio of sonar systems, anti-torpedo countermeasures, and advanced expendable sensors that complement its existing Rotary and Mission Systems division. Lockheed already provides Aegis combat systems, MH-60R Seahawk naval helicopters, and undersea warfare integration services, but the acquisition fills a critical gap in in-house sonobuoy and acoustic sensor manufacturing. This vertical integration could improve margins and ensure supply reliability as the Pentagon prioritizes undersea dominance. The deal also positions Lockheed as a key supplier for the AUKUS submarine pact and other multinational naval modernization programs.