Northern Star Resources (ASX:NST): How Is KCGM Mill Commissioning Shaping FY27?

Aditi Sarkar

29 October 2026 03:15 PM AEDT

Northern Star Resources (ASX:NST): How Is KCGM Mill Commissioning Shaping FY27?

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Highlights

Northern Star Resources (ASX:NST) sold 363,891oz of gold in the September 2026 quarter.
Quarterly all-in sustaining costs were AUD 3,217/oz, with net mine cash flow of AUD 210 million.
FY27 guidance remains 1.50–1.65Moz of gold sold at AISC of AUD 3,050–3,450/oz.
KCGM’s expanded mill completed its tie-in in September, with commissioning continuing.

Northern Star Resources Limited operates gold mines and processing facilities in Western Australia and Alaska, with its Kalgoorlie, Yandal and Pogo centres supplying production. The company’s September 2026 report detailed commissioning of the expanded KCGM mill, quarterly gold sales and expenditure across its operations. On 29 October 2026, Northern Star Resources (ASX:NST) shares traded at AUD 25.35, down 0.28% during the session. Its operating priorities include establishing sustained processing performance at KCGM, completing infrastructure work at Pogo and advancing engineering and approvals for the Hemi development project.

Company Business

Northern Star Resources (ASX:NST) operates three production centres. Kalgoorlie combines KCGM, Carosue Dam and other Kalgoorlie operations, using open-pit and underground mining and associated processing infrastructure. Its Yandal centre encompasses Jundee, Thunderbox and Bronzewing operations in Western Australia. Pogo is an underground gold operation in Alaska, adding exposure to US operating costs and currency translation.

The company also holds the Hemi development project in Western Australia’s Pilbara. Mine development, processing capacity, maintenance and ore grades affect the timing and cost of gold sales. The expanded KCGM processing plant is a central current investment, intended to replace legacy capacity and consolidate more processing at Fimiston.

Recent Development

In its 21 October 2026 quarterly report, Northern Star Resources (ASX:NST) recorded 363,891oz sold during the September quarter. Kalgoorlie contributed 193,540oz, Yandal 117,631oz and Pogo 52,720oz. The quarterly group AISC was AUD 3,217/oz. Planned shutdowns and commissioning work influenced volumes at Kalgoorlie and Pogo, while improved grades at Thunderbox contributed to its quarterly performance.

At KCGM, legacy processing plants shut on 21 September and the tie-in to the expanded facility was completed on 28 September. Early commissioning work continues to focus on stable operations. Stage II, intended to form a single processing hub, is scheduled for commissioning in early H2 FY27. The company also reported engineering and permitting progress at Hemi, where a final investment decision is targeted for late FY27.

Suresh Vadnagra began as managing director and chief executive officer on 5 October 2026. Subsequent operational reporting will show how processing reliability develops under the new leadership team.

Financial Performance and Sector Context

Northern Star Resources (ASX:NST) reported FY26 net profit after tax of approximately AUD 1.7 billion, up 24% year on year, and underlying net profit after tax of approximately AUD 1.8 billion, up 26%. FY26 underlying EBITDA was AUD 4.3 billion and underlying free cash flow was AUD 190 million. The company declared total FY26 dividends of 55 cents per share, fully franked, including a 30-cent final dividend.

For the September quarter of FY27, gold sales revenue was AUD 1,819 million, at an average realised price of AUD 4,999/oz. Net mine cash flow totalled AUD 210 million, while group underlying free cash flow was negative AUD 31 million, including AUD 113 million in corporate tax payments. Cash and bullion stood at AUD 1.20 billion at 30 September. The group subsequently drew AUD 500 million of bank facilities ahead of the final FY26 dividend payment.

Gold prices, fuel, labour, royalties and exchange rates influence operating economics. Northern Star retained FY27 guidance of 1.50–1.65Moz sold at AISC of AUD 3,050–3,450/oz; production is expected to be weighted towards the second half as KCGM ramps up.

Risks to Consider

Northern Star Resources (ASX:NST) faces commissioning and ramp-up risk at KCGM, including throughput, recovery and equipment reliability. Mine grades, planned maintenance and underground infrastructure availability can affect quarterly gold sales and unit costs. Gold-price movements and currency changes influence realised revenues and overseas operating results. Capital spending at KCGM and Hemi, regulatory approvals and project sequencing are further execution considerations. The remaining gold hedge book may also limit realised prices on hedged volumes.

What to Watch Next

Key milestones include sustained KCGM processing performance, Stage II commissioning in early H2 FY27 and progress towards the Hemi final investment decision in late FY27. Investors can compare subsequent quarterly sales with FY27 guidance and monitor AISC as output mix and plant availability change. Pogo’s infrastructure recovery, site-level capital expenditure and quarterly free cash flow provide additional operating indicators. The next quarterly results are scheduled for January 2027.

Key Insights

Northern Star Resources (ASX:NST) entered FY27 with 364koz of quarterly gold sales and its expanded KCGM mill in early commissioning. FY26 profitability increased, but the September quarter recorded negative underlying free cash flow amid continuing investment and tax payments. Guidance remains unchanged, with the timing of KCGM ramp-up, costs, Hemi approvals and cash conversion central to the company’s next reported milestones.

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