Key Takeaways
- Lockheed’s Ultra Maritime acquisition is set to expand its undersea warfare capabilities.
- Defense buyouts by Rheinmetall, Thales, RENK, AeroVironment and Teledyne signal wider naval consolidation.
- SHLD and MISL provide diversified exposure to defense firms participating in the trend.
To further strengthen its footprint in the future of naval warfare, the globe’s largest defense contractor, Lockheed Martin (LMT – Free Report) has recently announced a definitive agreement to acquire Ultra Maritime, a specialist in anti-submarine warfare (ASW), for $3.45 billion. This acquisition marks LMT’s strategic effort to integrate Ultra Maritime’s advanced sonar, torpedo defense, and autonomous sensing technologies into its Rotary and Mission Systems division, thereby enhancing its capability to deliver next-generation undersea solutions to allied forces.
Lockheed is far from an outlier in pursuing this strategy. Across the globe, defense primes are aggressively expanding their maritime and undersea capabilities through consolidation, signaling a significant shift in the industry.
For investors looking to gain exposure to this wave of naval consolidation, a diversified approach through Defense Exchange-Traded Funds (ETFs) may offer a more prudent path than betting on individual stocks. While the strategic rationale for these buyouts is clear, the integration risks and regulatory complexities inherent in defense M&A make a broader sector vehicle highly attractive.
To understand the full macro scope of this maritime shift, it is essential to look beyond Lockheed and examine the other recent power moves reshaping the naval defense landscape. It is precisely this industry-wide wave of consolidation that highlights the necessity of opting for a diversified ETF approach.
The New Arms Race Beneath the Waves
Lockheed’s latest announcement to purchase Ultra Maritime comes as part of a much larger pattern of consolidation seen lately across the defense sector, with other major contractors also making significant moves to bolster their maritime portfolios. These include:
• German arms manufacturer, Rheinmetall (RNMBY – Free Report) , which completed the takeover of Naval Vessels Lürssen (NVL) in March 2026. This consolidation establishes a dedicated German systems house for the development and manufacturing of state-of-the-art navy and coastguard vessels, as well as maritime autonomous surface systems.
• French defense contractor, Thales (THLLY – Free Report) , has recently reached an agreement to acquire the Gorgé family’s stake in Exail Technologies, a maker of autonomous underwater drones, valuing the firm at roughly $4.5 billion. This buyout should bolster Thales’ expertise in quantum sensors and underwater warfare.
• German-based RENK Group, a manufacturer of propulsion, gearboxes, transmissions, and suspension systems used in military battle tanks, acquired David Brown Defence in July 2026. This deal provides RENK with access to major “Five Eyes” naval programs, which involve 34 warships, including the Type 26 frigates and River Class destroyers.
• U.S.-based combat drone leader, AeroVironment (AVAV – Free Report) completed a massive $4.1 billion all-stock acquisition of defense tech firm BlueHalo in May, last year. This buyout directly expanded AeroVironment’s uncrewed and autonomous operations by bringing in advanced underwater robotic and subsea systems, including the Mission Specialist Defender ROV used by the U.S. Navy.
• Teledyne Technologies (TDY – Free Report) , an American defense electronics provider, acquired the TransponderTech business from Saab AB in October 2025. TDY’s rationale behind this takeover was to strengthen its maritime technology solutions, with TransponderTech’s communications and navigation solutions highly complementary and capable of expanding TDY’s marine portfolio.
This surge in M&A activity over the past year has been directly driven by escalating maritime threats in critical regions, particularly across Middle Eastern shipping lanes. The resulting vulnerability of global trade routes has forced commercial vessels to reroute along longer, costlier paths. In response, major global powers are aggressively deploying and upgrading their naval forces to secure these vital sea lanes — a macro demand shock perfectly reflected in the recent string of high-profile defense buyouts.
A New Horizon for Naval Defense: The Case for ETFs
Against the current backdrop, the outlook for the naval defense sector is exceptionally strong, with these acquisitions creating more integrated, powerful, and innovative players capable of delivering comprehensive solutions. For defense primes like Lockheed, the immediate benefit is clear — acquiring specialized technology and international market access.
However, investing directly in a company like Lockheed carries inherent risks. Execution risk is paramount; integrating a $3.45 billion acquisition is a complex process. Furthermore, defense stocks often face political and budgetary headwinds, as spending can be impacted by shifting government priorities.
Considering such single-stock oriented risks, investors seeking a safer, diversified route to capitalize on this industry-wide trend may instead go for defense ETFs that offer broad exposure to the sector, including Lockheed.
These ETFs minimize the risk associated with any single acquisition or stock, allowing investors to benefit from the overall growth of the defense industry, including the ongoing naval consolidation wave.
Defense ETFs to Consider
Considering the aforementioned discussion, a prudent investor may want to gain exposure to the following defense ETFs:
Global X Defense Tech ETF (SHLD – Free Report)
This fund, with net assets worth $7.36 billion, offers exposure to 50 companies that build and manage cybersecurity systems, utilize artificial intelligence and big data, and build advanced military systems and hardware, such as robotics, fuel systems, and aircrafts for defense applications. RTX Corp. (RTX – Free Report) holds the first spot in this fund, with 9.12% weightage, while LMT holds the third spot with 8.08% weightage. RNMBY holds the eighth position in this fund, with 4.09% weightage, while THLLY holds the 10th spot with 3.66% weightage.
SHLD has gained 8.6% over the past year. The fund charges 50 basis points (bps) as fees.
U.S. Defense ETF (DUTY – Free Report)
This fund, with net assets worth $2.95 million, offers exposure to publicly traded U.S. companies that have significant exposure to defense-related industries. General Dynamics holds the first spot in this fund, with 7.63% weightage, while LMT holds the second spot with 7.38% weightage.
DUTY has rallied 8.2% over the past year. The fund charges 45 bps as fees.
iShares Defense Industrials Active ETF (IDEF – Free Report)
This fund, with net assets worth $4.31 billion, offers exposure to 117 aerospace, cybersecurity, defense and infrastructure firms. RTX holds the first spot in this fund, with 8.48% weightage, while LMT holds the second spot with 7.08% weightage.
IDEF has surged 19.5% over the past year. The fund charges 55 bps as fees.
First Trust Indxx Aerospace & Defense ETF (MISL – Free Report)
This fund, with net assets worth $811.8 million, offers exposure to 39 U.S. companies engaged in business activities associated with certain aerospace and defense sub-themes. GE Aerospace holds the first spot in this fund, with 8.80% weightage, while LMT holds the sixth spot with 6.39% weightage.
MISL has soared 25.9% over the past year. The fund charges 60 bps as fees.