Argonaut Defence Sector Update: Spending surge meets fuel insecurity in a new supercycle

If ever there were a sector enjoying both a cyclical uplift and a structural re-rating, it’s defence - and increasingly, its Siamese twin, energy security. Argonaut analyst Pia Donovan’s latest sector note (31 March 2026) paints a picture of a world where geopolitics is doing the heavy lifting for order books, with Australian contractors positioned squarely in the slipstream.

At the heart of the thesis is the uncomfortable reality that war - specifically the escalating US-Israel-Iran conflict - has become a powerful economic catalyst. In just four days, some 5,200 munitions were deployed, a statistic that reads less like a battlefield update and more like a procurement forecast. The Pentagon’s mooted US$200 billion supplemental funding request (up from an earlier US$50 billion estimate) underscores how quickly inventories are depleted and replenishment cycles accelerate.

And if that weren’t enough, the Trump administration’s proposed US$1.5 trillion defence budget for FY27 signals a step-change in baseline spending. For Australian investors, the key takeaway is not just the magnitude, but the spillover: allies are being nudged - if not shoved - towards lifting their own defence outlays.

Australia: from reluctant spender to strategic participant

Australia, currently allocating around 2% of GDP to defence, is under increasing pressure to move towards 3.5%. Donovan notes that even the government’s projected rise to 2.33% by 2033 may fall short of expectations, particularly as NATO members target 5% by 2035.

Domestically, the spending trajectory is already formidable. Defence funding is expected to climb from A$59 billion this year to around A$100 billion annually by 2034, with nearly A$350 billion earmarked for capabilities over the decade.

But it’s not just the quantum - it’s the composition. Submarines, shipbuilding, and northern base infrastructure dominate the agenda. The Henderson Defence Precinct alone could absorb A$25 billion over time, while upgrades at HMAS Stirling and Osborne will underpin Australia’s AUKUS ambitions.

For contractors, this is less a pipeline and more a firehose.

Fuel security: the sleeper theme

If defence spending is the headline act, fuel security is the subplot rapidly stealing the show.

The closure of the Strait of Hormuz has exposed Australia’s reliance on imported fuel, prompting renewed urgency around domestic storage. Pre-war estimates of A$3.7-4.8 billion in fuel infrastructure investment now look conservative.

Argonaut highlights Saunders (SND) and Duratec (DUR) as key beneficiaries, given their exposure to fuel storage construction and maintenance. The logic is compelling: building new tanks is slow and capital-intensive, whereas refurbishing existing infrastructure offers a quicker fix - playing directly into Duratec’s wheelhouse.

There’s also a policy kicker. With criticism mounting over low fuel reserves, governments may mandate higher domestic storage levels or redirect supply domestically. Either way, more steel in the ground is required.

Energy crossover: margins meet momentum

The report makes a persuasive case that defence contractors with energy exposure are enjoying a double tailwind.

Duratec’s energy segment, for instance, delivered nearly 77% revenue growth between FY24 and FY25, with margins approaching 30%. Civmec (CVL) is also seeing strong momentum, forecasting FY26 energy revenue of A$110.8 million at a healthy 13.5% EBIT margin.

Even Bhagwan Marine (BWN), not traditionally pigeonholed as an energy play, derives more than half its revenue from oil and gas-linked activity following its Riverside Marine acquisition. Decommissioning - often overlooked - is emerging as a lucrative niche.

In short, energy exposure is no longer a side hustle; it’s a margin enhancer.

Company positioning: ships, steel and services

Among the coverage names, Austal (ASB) stands out for its leverage to US defence spending, with over 70% of revenue tied to its American operations. Expansion at its Mobile shipyard positions it well for major naval programs, while domestically it remains a cornerstone of Australia’s shipbuilding strategy.

Civmec and Duratec earn “key pick” status, thanks to their dual exposure to defence and energy, as well as strong pipelines of contract opportunities. Saunders offers leverage to fuel infrastructure, albeit with execution risks around meeting EBITDA guidance.

Bhagwan Marine, meanwhile, boasts the highest total shareholder return potential (82%), driven by offshore services and decommissioning upside.

Risks: the usual suspects, with a twist

No defence bull case would be complete without caveats. Argonaut flags the perennial risks: delays in government spending, labour shortages, and the possibility of work being insourced by Defence as capabilities grow.

Labour, in particular, looms large. With Defence targeting 69,000 personnel by the early 2030s, competition for skilled workers could constrain project delivery.

Still, there’s a counterbalance. A tight labour market may actually reinforce collaboration between government and industry, ensuring contractors remain integral to execution.

Valuation: steady as she goes

Despite the upbeat outlook, valuation changes are modest. Austal’s price target dips slightly to A$6.60 due to higher capex, while Civmec, Duratec, Saunders and Bhagwan Marine remain unchanged. All retain BUY ratings - a rare display of unanimity.

The underlying message is clear: the story hasn’t changed, but the conviction remains intact.

Final word

Argonaut’s report reads like a sector caught in the crosshairs of global instability - and benefiting accordingly. Defence spending is rising not by choice but by necessity, while fuel security has emerged as an equally pressing concern.

For ASX-listed contractors, this convergence creates a rare alignment of macro tailwinds. Ships need building, tanks need filling, and infrastructure needs upgrading. It’s not quite a golden age - but it’s certainly a busy one.