A defence contractor reborn

Babcock International has been one of the FTSE 100's most striking turnarounds. The shares are up 34.94% over the twelve months to 1 May 2026, comfortably ahead of the FTSE 100's 21.36% advance, and continuing a multi-year recovery from the operational and financial difficulties that beset the company through 2019–21. After a comprehensive portfolio rationalisation, balance-sheet repair, and renewed focus on its core nuclear, marine and aviation defence engineering capabilities, Babcock now sits at the heart of one of the most important defence themes of the decade: the UK's contribution to the AUKUS submarine Partnership and the broader rebuilding of European defence industrial capacity.

For investors, the past year has combined fundamental delivery with a powerful narrative. UK and allied defence budgets are rising, programmes are being accelerated, and Babcock's engineering and through-life support capabilities at HMNB Devonport, HMNB Faslane, and Rosyth are central to the UK's submarine and surface-fleet capability. The shares' gains reflect both the in-period operational performance and a structural rerating as the market has come to view the Business as a quality defence platform rather than a struggling outsourcer.

Latest results and trading update

Babcock's most recent reporting period covered the year to 31 March 2025, with subsequent quarterly trading updates pointing to continued momentum. Headline numbers showed steady Revenue growth, expanding underlying margins, and a solid free Cash Flow conversion that reduced net Debt and provided room for Dividend reinstatement and growth. Order intake has been particularly strong, with the order book extended and several long-dated programme awards renewing or increasing the visibility of future Revenue. Specifically, the SSN-AUKUS programme — the next-generation nuclear-powered attack submarine class for the UK and Australia — has driven a number of awards, including a five-year Ministry of Defence contract for design support.

Manufacturing of long-lead items for SSN-AUKUS has begun, including the first long-lead forgings for the weapon-handling and launch systems. The Dreadnought class ballistic missile submarine programme also continues at scale, with Babcock supplying missile tube assemblies and supporting through-life infrastructure at Devonport. An additional 36 missile tube order from General Dynamics Electric Boat for the US Navy's Columbia-class submarine programme — a separate but related capability — has further deepened Babcock's position in the global submarine industrial base.

Outside submarines, the marine Business has supported continued surface-fleet refit and through-life management activity for the Royal Navy. The aviation engineering Business, including support for trainer aircraft and rotary-wing platforms, has stabilised after several difficult years, while the international Business — including operations in Australia, Canada and France — has continued to grow.

Why the stock has performed

Three forces have driven the rerating. First, the structural shift in defence spending. The UK has committed to a substantial increase in defence outlays as a share of GDP, tracking towards 3% over the medium term, and several European NATO allies have similarly accelerated programmes. The political and security environment — Russia's continued aggression in Ukraine, growing concern about strategic competition in the Indo-Pacific, and broader geopolitical fragmentation — has lifted defence to a clear strategic priority for governments. Babcock, as one of the UK's primary defence engineering and through-life support providers, is a direct beneficiary.

Second, the AUKUS programme itself. The trilateral Partnership between Australia, the UK and the United States to build a class of nuclear-powered attack submarines for both the UK and Australian navies has crystallised into concrete industrial commitments. Babcock's role spans design support, long-lead Manufacturing, Supply chain qualification and infrastructure works at the UK and Australian shipyards. The programme runs into the late 2030s and beyond, providing decades of Revenue visibility.

Third, the operational turnaround. After a difficult period that included impairments, contract write-downs and a strategic review, Babcock has simplified its portfolio, exited several lower-Margin businesses, and refocused on engineering services where it has genuine capability advantages. The result has been a more profitable, more cash-generative Business with a cleaner Balance Sheet and a credible reinvestment story.

Sector and macroeconomic backdrop

The defence sector has rarely had such a supportive macro backdrop. Geopolitical risks have multiplied: the war in Ukraine, tensions across the Taiwan Strait, the long-running situation in the Middle East, and a more confrontational tone in great-power competition have all pushed governments to invest in capability. Submarine and undersea capability in particular has become a strategic priority, with allies focused on countering threats from emerging powers and protecting critical undersea infrastructure including subsea cables and pipelines.

Industrial capacity is a genuine constraint. Building nuclear submarines requires a unique combination of skills, facilities and Supply chains that cannot be expanded quickly. Babcock's role in maintaining and growing that industrial base is itself a moat: the UK's submarine industrial enterprise depends heavily on Babcock's facilities at Devonport and Rosyth, and any significant expansion of capability requires the company's engagement at scale.

From a macroeconomic perspective, defence spending is broadly insensitive to the consumer cycle but more sensitive to government fiscal capacity and political priorities. Even in environments of fiscal tightening, defence has historically been protected, and the current commitment to higher defence spend looks robust across the major political parties in the UK.

Broker and investor sentiment

Sell-Side opinion on Babcock has shifted decisively positive. Most Brokers now have a Buy rating, with twelve-month price targets continuing to rise as the order book grows. Sentiment improved further after each AUKUS-related contract announcement, with several Brokers explicitly citing the SSN-A programme as a multi-decade catalyst that justifies a higher multiple than the historical average for UK defence services.

Long-only ownership has broadened, with several global defence-focused funds and ESG-mindful investors building positions. (The latter reflects a more nuanced view of defence as a legitimate component of national security infrastructure than was prevalent five years ago.) Hedge fund interest is largely directional rather than short, with Leverage to defence spending viewed as one of the cleaner UK macro thematic exposures available.

Risks and opportunities

Risks include programme execution. Submarines are among the most complex engineering products built anywhere, and delays, cost overruns or technical issues are perennial concerns in the sector. Political risk is real but currently muted: a dramatic shift in defence policy is unlikely in the near term, but cannot be entirely dismissed. Operational issues at any of Babcock's major facilities — Devonport, Rosyth or its overseas operations — would be expensive to address. Skilled labour availability is a constraint across the global defence industry and could affect throughput.

Opportunities lie in further programme awards, including potential extensions to surface fleet maintenance, additional missile tube orders, and capability-related work for allies. International growth, particularly in Australia, where the AUKUS Partnership is creating new industrial opportunities, has the potential to be a significant contributor to growth. Aviation engineering, while smaller, has selective opportunities to grow as ageing fleets need refurbishment and modernisation.

AUKUS in detail: what Babcock actually does

The AUKUS programme is unusually opaque from the outside, partly because it spans three governments and partly because of its security sensitivity. From an investor perspective, the key things to understand are these. First, the SSN-AUKUS submarines being built will be designed for both the UK and Australian navies, replacing the UK Astute class and providing Australia with its first nuclear-powered submarine capability. Babcock has secured a five-year contract from the UK Ministry of Defence to provide detailed design input. Second, Manufacturing of long-lead items has commenced; the long lead times of submarine construction (typically more than a decade from steel-cut to commissioning) mean that work begun now contributes to deliveries in the late 2030s and into the 2040s. Third, the programme creates Supply chain opportunities globally, and Babcock through its joint venture H&Amp;B Defence with HII has secured contracts to qualify Australian suppliers for the global AUKUS enterprise.

For Babcock, the AUKUS Revenue stream is unusually predictable: the programme is national strategic priority for three governments, the contracts are typically multi-year with modest near-term Revenue ramping but very long durations, and the technical content is high enough that competitive disintermediation is essentially impossible.

The aviation Business and ageing fleet opportunity

Beyond the marine and nuclear businesses that dominate headlines, Babcock's aviation division provides important defence engineering services to fixed-wing trainer aircraft and rotary-wing platforms. The unit has historically been more cyclical than the marine Business, but recent contract wins for fleet management and through-life support — particularly around Training aircraft and emergency services aviation — have added stability. As legacy military fleets age in the UK and across allied air forces, Demand for refurbishment, life-extension and capability-upgrade work is likely to grow over the medium term, and Babcock's engineering capabilities are positioned to capture a portion of that opportunity.

International operations in Australia, Canada, France and elsewhere have provided Diversification and growth. The Australian Business in particular benefits from the AUKUS infrastructure Investment and from Babcock's existing footprint in Australian naval support. Canada, with its significant naval modernisation programme, is another important market. France, where Babcock has historically been involved in nuclear waste management and defence services, continues to provide stable contribution.

Capital allocation and Dividend reinstatement

An important feature of the past year has been the continued normalisation of Babcock's Capital framework. After the difficult years of 2019–21, when impairments and balance-sheet repair forced significant restraint, the company has reinstated and grown the Dividend, reduced net Debt, and begun to invest more confidently in capacity expansion. The reinstated Dividend, while still modest in Yield terms, signals confidence in the durability of cash generation and provides additional support for share price valuation.

Capital allocation priorities going forward focus on investing in the production capacity needed to deliver on the order book, particularly in submarines and missile-tube Manufacturing, while continuing to grow the Dividend and selectively pursuing bolt-on acquisitions. The Balance Sheet remains in a position to support that strategy comfortably.

A note on programme-led valuation

Investors looking at Babcock should recognise that defence engineering services are valued differently from many parts of the industrial sector. Long programme visibility, government backing and high barriers to entry support a multiple that has historically been somewhat below the most premium quality industrials but somewhat above the cyclical engineering services sector. As the order book has grown and the operational profile has improved, the appropriate multiple has shifted upwards, which is part of what has driven the share-price gains. Whether the rerating has further to run depends on continued evidence of Margin expansion and cash conversion. So far the trajectory has been encouraging, but investors taking a fresh look should size positions with regard to the inevitable cyclicality and execution risk that come with large defence contracts.

Conclusion

Babcock's 35% one-year gain reflects both the operational turnaround that has been under way for several years and the increasingly attractive structural backdrop for UK and allied defence engineering capacity. The AUKUS programme, in particular, has anchored a multi-decade Revenue visibility that few UK industrials can match, while the broader rise in defence spending across NATO has lifted Demand across the company's portfolio.

For investors, the next test is whether Babcock can convert a strong order book and macro tailwind into sustained Margin expansion and cash generation. Execution risk is real but historically manageable for the company at its current scale. The combination of a structural defence theme, programme-specific catalysts, and an improved operational platform makes Babcock one of the more interesting UK defence engineering exposures available on the London market.