Thematic hub | Industrial | Defence

What are defence stocks?

The defence sector includes companies that sell military equipment and weapons systems to government clients.

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Unlike most industrial subsectors, defence contractors derive the majority of their revenue from long-term government procurement programmes rather than on commercial markets, and have a limited number of potential clients who are unusually involved in planning and production decisions. This gives defence stocks distinctive investment characteristics, demonstrating less cyclical volatility than other industrial businesses while facing unique political and financial risks.

Government contracts and revenue stability

Though it shares certain features with aerospace and other industrial sectors, defence stocks are unique amongst industrial businesses. Construction companies or machinery manufacturers compete in commercial markets where demand fluctuates with economic conditions, but defence contractors depend on government budget allocations and procurement decisions. This creates both advantages and constraints. Multi-year contracts provide revenue visibility extending years into the future, insulating companies from the quarterly volatility that affects most industrial stocks. However, this stability comes at the cost of customer concentration, with government clients accounting for the overwhelming majority of sales, and the choice of clients being strongly limited by geopolitical and legal factors. Programme cancellations, budget reallocations, or shifts in strategic priorities can impact individual companies, even when overall defence spending remains high. Due to its vast military budget, the US defence sector is somewhat safer than those of smaller countries, but project cancellations can still cause huge budget holes.

Competition and preferred providers

Due to the nature of their products, companies manufacturing weapons and defence systems are tightly controlled. Alongside nuclear power, the defence sector is perhaps the most regulated in the world. Barriers to entry are high: security clearances, classified technology requirements, extensive regulatory compliance, and the technical complexity of modern military systems all limit competition to a relatively small number of established contractors. These barriers protect existing players but also constrain growth opportunities, as the customer base remains largely fixed and new market entrants are rare. The sector has experienced significant consolidation over recent decades, with major programmes now dominated by a handful of prime contractors who manage complex supply chains involving hundreds of smaller specialist firms; defence contracting decisions are also intensely political, and many major projects, such as a new fighter jet or type of vehicle, will involve multiple contractors working together, sometimes internationally.

Investing in defence stocks

Defence companies or military stocks range from large integrated contractors managing billion-dollar programmes to specialist suppliers focusing on particular technologies or components. Some firms derive nearly all their revenue from military contracts, others maintain significant commercial operations alongside defence work, particularly in aerospace or electronics. Service providers offer maintenance, training, and logistics support with more stable, recurring revenue streams compared to platform manufacturers. Compared to comparable industrial stocks, understanding the specific projects a contractor is bidding for or working on is of greater importance, since the client base is much narrower. Since defence budgets are debated extensively and because there is a large dedicated press for the industry, this information is somewhat easier to find than for more niche subsectors.

Sector Highlights

Global market size: Global military expenditure in 2024 was over $2.7 trillion, and the US defence budget for 2026 has been requested at over $900 billion, not all of which will go to defence contractors. The market capitalisation of US defence stocks is difficult to measure due to the mixed operations of many major companies, but is likely over $600 billion.
Top stocks: RTX, Lockheed Martin, Honeywell
Important themes: Military spending, modernisation, export controls.

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Important defence stocks

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Market trends impacting defence stocks

Elevated geopolitical tensions and heightened spending commitments by NATO have created a favourable procurement environment for defence contractors, with governments prioritising military equipment modernisation after years of constrained spending following the financial crisis. However, the political nature of defence budgets means spending levels remain vulnerable to policy shifts, electoral outcomes, and competing fiscal priorities. Defence stocks benefit from multi-year visibility through existing contracts, but future programme awards depend on sustained political support for military expenditure. Unlike cyclical industrial stocks that respond to economic growth, defence contractors are primarily influenced by geopolitical assessments and political decisions about national security priorities. Exports of military hardware are notoriously difficult, with governments often favouring domestic production or cancelling bids at the last minute.

Modernisation

High-profile defence products such as fighter aircraft or tanks are usually described in terms of generations, with higher numbers indicating a more modern product. Integrating new technology creates opportunities for companies with relevant expertise whilst potentially disadvantaging those dependent on mature platforms approaching their end-of-life. The development timelines for advanced defence systems extend across decades, with programmes progressing through research, development, testing, and production phases before generating substantial revenue. Companies must invest heavily in new technologies without certainty of programme success, creating execution risk absent from commercial manufacturing, and somewhat reminiscent of pharmaceutical discovery.

Export controls and international competition

Defence exports represent a significant revenue stream for US contractors, but face extensive regulatory oversight through export control regimes and foreign military sales processes. Geopolitical relationships directly influence which countries can purchase particular technologies, with sales to certain regions requiring congressional approval and potentially facing political opposition, or in some cases sanctions and bans on equipment sales. This creates market access barriers that commercial industrial companies do not encounter. Meanwhile, international competitors in Europe and elsewhere vie for defence contracts, with governments often favouring domestic producers for national security reasons or requiring offset agreements that complicate procurement economics. The fragmented nature of the global defence market, with limited opportunities for true multinational consolidation due to security concerns, distinguishes defence from other industrial subsectors where cross-border integration has progressed further.

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FAQs

How do defence stocks differ from other industrial stocks?

Defence stocks depend on government budget allocations and procurement decisions, with a far narrower client base than other industrial products. The businesses behind these stocks are exposed to political risk but also have some advantages over manufacturers operating in commercial markets: Multi-year contracts provide revenue visibility extending years into the future, insulating defence contractors from quarterly volatility that affects most industrial stocks. However, this stability comes with customer concentration risk. Programme cancellations, budget reallocations, or shifts in strategic priorities can impact individual companies even when overall military spending remains high. Unlike cyclical industrial stocks that respond to economic growth, defence contractors are primarily influenced by geopolitical assessments and political decisions about national security priorities. The sector is among the most heavily regulated globally, with high barriers to entry, which results in a cyclical sector that is more influenced by political decisions than overall economic expansion.

What role do tariffs and export restrictions play in the US defence sector?

Defence exports represent a significant revenue stream for US contractors but face extensive regulatory oversight and limits on potential clients. Geopolitical relationships directly influence which countries can purchase different technologies, with sales to certain regions banned or restricted. This creates market access barriers that commercial industrial companies do not encounter. International competitors in Europe and elsewhere vie for the same contracts, with governments often favouring domestic producers for national security reasons or requiring offset agreements that complicate procurement economics. The fragmented nature of the global defence market, with limited opportunities for multinational consolidation due to security concerns, distinguishes defence from other industrial subsectors where cross-border integration has progressed further. However, like other industrial sectors that use international supply chains, the ongoing US tariff system has raised costs for US manufacturers.