Evolution Mining Holds FY27 Guidance After a Slow Gold Start, but Red Lake's 5+ g/t Grade Requirement and Grid Instability Leave Little Room for Error
September quarter call, October 13, 2026: 154,000 ounces of gold, $1,653 per ounce AISC and a second-half-weighted year
Evolution Mining reported a deliberately soft start to FY27 but kept all group guidance intact. The September quarter produced 154,000 ounces of gold and 18,000 tonnes of copper at an all-in sustaining cost of $1,653 per ounce, below the low end of guidance and, in management's words, "one of the lowest in the sector." The result carries a clear message. Copper by-product credits and cost control are doing the work of protecting margins while gold volumes catch up, and the company is asking investors to accept that the recovery is back-end loaded.
Red Lake carries the largest execution risk in the guidance
The most important debate on the call was Red Lake. Goldman Sachs analyst Hugo Nicolaci calculated that, after a mid-3 g/t grade in the quarter, the mine must average more than 5 g/t for the rest of the year, and probably 5.5 to 6 g/t in the second half, to hit guidance. Chief Operating Officer Matt O'Neill did not dispute the arithmetic and described the target plainly: "that grade will be a stretch." He said the grade is in the mine sequence, but the fallback is volume. Management is working through the December and March quarters to fill the mills with additional tonnes as contingency, and it has plant capacity to do so.
The quarter's miss stemmed from an unusually high number of grid outages, reduced availability of the frontline production fleet and a scheduled shutdown, which together disrupted the mining sequence. Two new mining areas, HGY and Upper Balmer, are due to come on by the end of the December quarter. If they ramp on time, the grade case is credible. If they slip, the guidance rests on tonnes rather than grade.
On power, O'Neill attributed the instability to additional community load being connected to a spur line, which is producing under- and over-voltage trips. Evolution is working with Hydro One to align network protection settings with those protecting its own equipment, and expects improvement "over the course of the next probably month or 2." CEO Lawrie Conway was candid about the limits of its control. If the remediation works, the plant can absorb more tonnes. If outages persist, "that's beyond our control, and we'll process whatever we can through the plants, and we'll assess it as each quarter goes by." That is an implicit acknowledgement that guidance carries a power-dependent risk, particularly as winter approaches.
Mungari's power fix is a 12 to 18 month proposition
Mungari was also hit by regional power interruptions and downtime in July, though it is now running at planned rates. The remedy is slower than at Red Lake. Evolution is investigating a battery to allow a controlled wind-down of the plant during hard stops, which O'Neill said is "12 to 18 months probably at best" away. Soft stops with advance notice are manageable, while hard stops cause after-effects that carry into production.
Management is not counting on the Kalgoorlie region improving. O'Neill said the problem stems from generation capacity and that additional load is a risk to the region, partly offset by behind-the-meter supply. The company is "not expecting necessarily the regional situation to change or get a lot better in the short term." The grade uplift expected from Castle Hill Stage 2 now falls in the March quarter and early June quarter, after material was pushed back when the mill was modified during the July downtime. Underground output at Kundana is expected to improve as absenteeism is addressed and additional staff are recruited. Evolution said it is open to sourcing higher-grade ore from third parties to fill the mill but "we don't need it at the moment."
Labor turnover is flat, and Evolution is not chasing wages
Asked about industry-wide labor pressures, O'Neill said turnover is roughly unchanged from last quarter. Evolution has chosen not to match wage offers. "We don't want to chase for an extra $1 or $2 for every hour of what people are chasing," he said, preferring to compete on site security and culture. He noted that some workers return, but staff are still leaving for higher pay elsewhere in the region. The approach protects costs but carries a productivity risk at Mungari underground, where absenteeism has already affected output.
Cowal's transition leans on oxide feed with a 25% ceiling
Cowal is in the transition phase between the E42 cutback and the restart of Stage I. The E46 pit is now fully ramped up and contributing about 25% of mill feed. Heavy rainfall early in the quarter forced more reliance on low-grade stockpiles, and a slower ramp-up by the new underground mining contractor reduced underground output. Underground production is back on plan, and the Regal portal remains on track for completion by the end of December, a key enabler of the second-half ramp-up.
Mill throughput exceeded a 9 million tonne annualized rate in the quarter, which O'Neill attributed to the oxide material from E46, which processes more easily than fresh rock. The constraint is downstream. Above 25% oxide, mass flow and slurry viscosity problems emerge, and the mill has had to cut back below that level at times depending on the oxide type. Oxide feed should be available for the next 12 to 18 months. The throughput benefit is therefore real but temporary, and it comes with the usual operational risk of an elevated oxide blend.
Ernest Henry and Northparkes carry the portfolio
Ernest Henry delivered a record net mine cash flow of $186 million. Management was clear that this reflects mine sequencing, with the cave currently outside lower-grade zones, rather than any positive reconciliation. O'Neill said grades will soften over the next couple of quarters but remain well within guidance. A second raise bore has been sourced, and capacity on site is now maxed out, supporting the Northeast block ventilation completion and productivity below the crushing horizon. Exploration intersected mineralization up to 900 meters below the current mining area, including 61.3 meters at 1.26% copper and 0.77 g/t gold, which supports management's confidence that the mine can operate beyond the current plan to 2042.
At Northparkes, the Board approved a concentrate regrind and filtration project that lifts recoveries by 2% for gold and 1% for copper by the start of FY29. The IRR is 30% to 37% and Evolution's share of the investment is $72 million, already included in the group capital outlook. Bank of America's Kate McCutcheon calculated that, combined with the coarse particle flotation project, the improvement is a roughly 4% gold uplift. Conway confirmed the project is additive and said that together the two projects allow throughput above the current 7.5 million tonnes per annum, against a permitted 8.5 million. A submission for a larger plant will follow once the study concludes at the end of FY27.
Cash flow is strong, but December carries a heavy tax bill
At Q1 achieved prices, Evolution estimates FY27 operating mine cash flow of about $3.6 billion, $200 million above FY26 even after cost escalation. The AISC margin improved to 73%. Group cash flow was $185 million, cash ended at $1.47 billion and net cash was $141 million. The company has no debt repayments until FY29 and is fully unhedged, so it retains full exposure to the gold price in both directions.
Working capital absorbed $136 million in the quarter, against more than $100 million a year earlier. Conway cited $40 million to $45 million of year-end equipment purchases at Cowal and annual short-term incentive payments, both of which are seasonal. An agreed insurance receivable at Ernest Henry, of which $25 million is due in December, and the absence of incentive payments should reduce outflows by roughly $60 million to $65 million next quarter. A $120 million receipt from Triple Flag is also expected in the December quarter. Offsetting this, the final FY26 tax payment falls in December, and Conway guided to a total near the roughly $200 million paid last December, versus about $100 million in a normal quarter.
Growth pipeline: Carnaby and a Philadelphia equity stake
The acquisition of Carnaby Resources remains on track for completion by mid-November, subject to a shareholder vote. Conway said the first priority is finishing the study, which will take 12 to 18 months, while permitting runs in parallel. The study must be reworked because Carnaby had planned to toll treat, whereas Evolution intends to bring the ore to its own operations. In the quarter, Evolution also took a 9.9% equity stake in Arizona Gold & Silver to fund a farm-in at the Philadelphia project, a roughly 3-kilometer strike that has not been drilled deeply. Conway said it has the potential to reach a scale that fits Evolution, and drilling is beginning now.
On greenfields, management reiterated that the Americas are the focus because of access, opportunity count and entry cost, with projects including Two Times Fred, Clisbako, Lake St. Joseph, October Gold and Philadelphia. In Australia, exploration will focus heavily on the Corella land around Ernest Henry.