Stanmore Resources

The Business

Stanmore mines hard coking coal and pulverised coal injection (PCI) coal from three operations in Queensland's Bowen Basin: South Walker Creek, Poitrel, and the ageing Isaac Plains Complex, selling almost entirely into steelmaking markets rather than power generation. That makes it one of a handful of ASX-listed pure-play metallurgical coal producers, alongside Coronado. Reserves total 571 million tonnes, enough for roughly 41 years at current production rates. Singapore-based Golden Energy and Resources (GEAR) holds 59% of the register, shaping capital allocation and introducing related-party costs that independently governed peers do not carry.

Recent Performance

Revenue fell from US$2,396 million in FY24 to US$1,881 million in FY25 as met coal prices retreated from post-pandemic highs, dragging EBITDA margin down from 29.8% to 20.4% over the same period. First-half FY26 results showed a realised price of US$153 per tonne, still below the roughly US$170 per tonne we estimate as mid-cycle. The stock has traded broadly sideways over the past year, tracking the coal price rather than any company-specific catalyst.

Outlook

We expect revenue and profitability to recover over FY27 and FY28 as realised coal prices climb toward mid-cycle levels near US$170-175 per tonne and production volumes normalise around 13.5 million tonnes annually. Margin expansion should be meaningful given Stanmore's largely fixed cost base, but Queensland's progressive royalty regime caps the benefit: above A$175 per tonne, the marginal royalty rate reaches 40%, so Stanmore keeps only 60 cents of each incremental price dollar. Earnings are expected to swing from a modest loss in FY26 to a solid profit by FY28, though the scale of that recovery depends heavily on the price path holding roughly as assumed.

Valuation Approach

Our assessment blends discounted cash flow analysis, trading multiples against ASX-listed metallurgical coal peers Whitehaven, Coronado and Yancoal, and an asset-based replacement cost approach. These methods converge within a tight range despite relying on different underlying assumptions, which supports reasonable confidence in the estimate, though met coal price uncertainty remains the dominant swing factor.

Scenario analysis spans a severe downturn case, where extended price weakness combines with delayed growth approvals, through to a structural supply-deficit case where premium coking coal prices sustain well above current levels. The current market price sits within that range but closer to the optimistic end, implying the market is assigning a lower probability to prolonged price weakness than the evidence, particularly Stanmore's rising cost base, supports.

Key Risks

Sustained met coal price weakness is the largest risk to the thesis. If premium hard coking coal stays below US$140 per tonne for two years or more, free cash flow after lease payments would turn negative and materially impair equity value; Stanmore carries no price hedging, so this risk flows directly through to earnings. Structural cost inflation is the second key risk: a permanent reset of cash costs above US$110 per tonne, driven by a stronger Australian dollar, the escalating Safeguard Mechanism carbon cost and elevated diesel prices, would further compress returns from an already elevated cost base. A two-year delay to government approval of the Isaac Downs Extension would create a production gap once Isaac Plains closes and would weigh on project economics, though the brownfield nature of the site supports a reasonably favourable approval outlook.

What to Watch

The thesis-defining event is the FY2026 full-year result in February 2027, which will confirm whether Stanmore's cash costs are normalising toward the low-to-mid US$90s per tonne range we assume, or remaining stuck above US$100.

• Late 2027 Isaac Downs Extension government response — approval, which we view as the more likely outcome given the brownfield site and existing infrastructure access, would remove a looming production gap once Isaac Plains closes.
• Ongoing Quarterly coking coal price resets — Stanmore is, first and foremost, a leveraged play on the metallurgical coal price cycle, so each move in realised price has an outsized effect on our assessment relative to cost or volume changes.

Company Description

Stanmore operates three coal mines in Queensland's Bowen Basin: South Walker Creek and Poitrel, both open-cut operations producing a blend of hard coking coal and PCI coal, and the higher-cost Isaac Plains Complex, approaching the end of its mine life. Combined output runs at roughly 13-14 million tonnes a year, sold almost entirely (about 93% of revenue) into steelmaking markets across Japan, Korea, China and increasingly India. It is a single-segment business, so its fortunes track one commodity closely. Singapore's Golden Energy and Resources (GEAR) controls 59% of shares outstanding and markets a portion of Stanmore's coal through a related entity, M Resources, for a fee.

Where the Growth Is

The Isaac Downs Extension (IDE) is the key near-term growth project, designed to replace the roughly 2 million tonnes of production lost when Isaac Plains closes. Approval is more likely than not given the brownfield site and existing infrastructure access, with commissioning targeted for FY2027-28. Approval would remove a looming production gap and a period of elevated per-tonne fixed costs, supporting a more favourable earnings trajectory from FY2027-28 onward. The undeveloped Eagle Downs longwall project offers further optionality but remains years from any final investment decision.

Competitive Position

Stanmore's core advantage is longevity rather than cost leadership: 571 million tonnes of 2P reserves support roughly 41 years of production, among the longest mine lives of any ASX-listed coal producer. Shared access to Bowen Basin coal handling plants, rail and port infrastructure lowers the incremental cost of expansion relative to a greenfield developer. However, cash costs of roughly US$101 per tonne sit in the third quartile of the global cost curve, well above lower-cost peers such as Yancoal. That matters because Queensland's royalty regime is progressive, with the marginal rate rising to 40% above A$175 per tonne, so price recovery delivers proportionally less margin uplift to a higher-cost producer facing the same royalty schedule. Market share sits at roughly 4% of seaborne metallurgical coal, a position we assess as stable rather than growing.

Management & Capital Discipline

Management has delivered reliably on operational targets, meeting production and cost guidance within 98-102% over recent periods, and refinanced debt onto non-amortising terms that remove near-term maturity pressure through the cycle trough. Capital allocation has otherwise been conservative: the dividend is suspended and there has been no value-creative M&A since the 2022 acquisition that built the current portfolio. The less-discussed side of the ledger is governance: GEAR's control comes with roughly US$58 million a year of related-party costs, including marketing fees and above-market pricing on a GEAR-provided facility, a genuine cost to minority shareholders that receives limited context in company disclosures.

Financial Position

The balance sheet is well-placed to absorb a prolonged downturn. Net debt sits at roughly 0.2 times EBITDA excluding lease liabilities, and total liquidity of around US$408 million provides an estimated 24 months of survival under our severe scenario. Including the roughly US$572 million of lease liabilities tied to Stanmore's contractor mining model, leverage rises to closer to 1.9 times EBITDA, a figure that better reflects total cash commitments but does not signal near-term financial stress given the non-amortising debt and absence of near-term maturities.