Key Highlights

  • Stage one of the KCGM mill tie-in was completed on 28 September.
  • Commissioning of the integrated plant is in its early stages.
  • The ramp-up affected grades and recoveries during the quarter.
  • Delivery on the integrated plant is a key test of FY27 performance.

Northern Star Resources Ltd (ASX:NST), a constituent of the S&P/ASX 200 Materials index, has completed a major tie-in at its Kalgoorlie Consolidated Gold Mines (KCGM) operation. The short answer is that this is a key test of FY27 delivery, though not the only one.

What the company does

Northern Star is one of Australia's largest gold producers, with three production centres: Kalgoorlie and Yandal in Western Australia, and Pogo in Alaska. It is also studying the Hemi project in the Pilbara.

Revenue is driven mainly by volumes sold and the realised gold price, while profitability depends on All-In Sustaining Cost (AISC) per ounce, which captures mining, processing, administration and sustaining capital.

Latest developments

On 21 October 2026 the company released its September 2026 quarter report. It said the stage one KCGM mill tie-in was completed on 28 September and that commissioning of the integrated plant is in its early stages. Stage two commissioning is scheduled for early in the second half of FY27. The company said the ramp-up affected grades and recoveries during the quarter.

Suresh Vadnagra became Managing Director and Chief Executive on 5 October 2026. Studies for the Hemi project are reported to be on schedule for a final Investment decision late in FY27.

The company also paid a final Dividend of 30 cents per share for FY26 on 15 October 2026, and on 9 October 2026 it drew A$500 million on its bank facilities.

Financial and operational evidence

For the September 2026 quarter, Northern Star sold 363,891 ounces of gold at an AISC of A$3,217 per ounce. Net mine Cash Flow was A$210 million, with all three production centres positive. Group underlying free cash flow was reported as negative A$31 million after A$113 million of tax payments. Cash and bullion at 30 September 2026 were A$1.2 billion, comprising A$968 million of cash and A$232 million of bullion.

Underlying EBITDA was reported at A$4.27 billion.

FY27 guidance was left unchanged at 1,500,000 to 1,650,000 ounces sold, at an AISC of A$3,050 to A$3,450 per ounce, and it is weighted to the second half. Reported Capital expenditure guidance is A$2.55 billion to A$2.94 billion, with exploration of A$230 million to A$250 million. The September quarter result sits at the upper end of the cost range, which is consistent with management's second-half weighting.

Material risks

Execution is the first risk. Commissioning a large integrated plant can bring delays, lower recoveries or higher costs, and the company has already acknowledged an effect on grades and recoveries from the ramp-up. Guidance depends heavily on the second half, which leaves less room for error.

Commodity and currency exposure is the second. Earnings are sensitive to the Australian dollar gold price, and a fall would compress margins when costs are close to the top of guidance.

Cash generation is the third. Free cash flow was negative in the latest quarter, capital spending is substantial, and the company has used its bank facilities. A Leadership transition adds further uncertainty, and the Hemi project carries permitting, engineering and capital-cost risks until a decision is made.

Milestones to watch

Investors may watch several dated events: the stage two KCGM commissioning in early in the second half of FY27, the December 2026 quarter report, when grades, recoveries and AISC should show whether the ramp-up is improving, and the half-year results expected in February 2027.