Highlights

  • Hillgrove Resources shares fell 6.82% on 22 April 2026, despite reporting record quarterly copper production and improved cash flow.
  • March quarter copper output reached 3,120 tonnes, marking the fourth consecutive quarter of growth while remaining within full-year guidance.
  • Operating mine cash flow increased to AUD 14.6 million, supporting a 22% rise in group cash balance to AUD 25.2 million.
  • Net group cash flow turned positive at AUD 4.8 million, compared to a negative AUD 1.8 million in the previous quarter.
  • All-in sustaining cost (AISC) of USD 6.20/lb remained within guidance, with cost discipline maintained despite inflationary pressures.

Hillgrove Resources Ltd (ASX:HGO) shares declined 6.82% to AUD 0.041 during trading on 22 April 2026, even as the company released its quarterly update for the period ended 31 March 2026, highlighting record production levels and improving cash flow metrics.

The stock has increased 36.67% over the past one month, which means that today’s decline may be due to investors squaring off their positions after the recent gains. Over a one-year period, the stock has delivered a modest gain of approximately 2.5%

Hillgrove Resources is an Australian copper producer focused on its Kanmantoo Copper Mine in South Australia. The company has been progressing through a ramp-up phase, aiming to increase production rates while maintaining cost efficiency and expanding its resource base through targeted exploration. Its operations are supported by proximity to infrastructure, including Adelaide and port facilities, which contributes to logistical efficiency and cost management.

Record Production and Operational Momentum Continue

For the March quarter of 2026, Hillgrove reported copper production of 3,120 tonnes, representing a 5% increase compared to the December quarter output of 2,962 tonnes. This marks the fourth consecutive quarter of production growth, reflecting continued operational progress at the Kanmantoo mine.

Ore mined during the quarter remained stable at 401 kilotonnes, supported by ongoing underground development and stope availability. Processing performance also remained consistent, with 406 kilotonnes processed at a copper grade of 0.81% and recovery rate of 95%.

In addition to copper, by-product output contributed positively, with gold production increasing by 16% quarter-on-quarter to 872 ounces and silver production rising 17% to 24,372 ounces. These by-product credits supported overall cost efficiency and revenue generation.

The company indicated that mining is advancing through a pinch zone, with both stope volumes and grades showing improvement, which may support further production stability in upcoming periods.

Revenue Growth Supported by Pricing Environment

Revenue for the March quarter reached AUD 53.8 million, reflecting a 5% increase compared to the previous quarter. This growth was primarily supported by higher realised copper prices and improved by-product pricing.

The average realised copper price for the quarter was AUD 16,629 per tonne, up from AUD 14,754 per tonne in the December quarter. However, payable copper sales declined due to timing differences in shipments, leading to an increase in concentrate inventory to 1,105 tonnes at quarter-end.

This build-up in inventory reflects logistical timing rather than operational weakness, though it may have influenced near-term revenue recognition.

Cash Flow Strength and Balance Sheet Improvement

Operating mine cash flow increased 16% quarter-on-quarter to AUD 14.6 million, highlighting improved earnings generation from core mining operations. This contributed to net mine cash flow of AUD 6.6 million, a notable increase from AUD 1.8 million in the previous quarter.

At the group level, Hillgrove reported net cash flow of AUD 4.8 million, compared to a negative AUD 1.8 million in the December quarter, indicating a return to positive cash generation.

The company’s cash position strengthened to AUD 25.2 million at the end of March 2026, representing a 22% increase from AUD 20.6 million in the prior quarter. This improvement was largely driven by higher operating cash flow.

Working capital also increased to AUD 36.0 million, supported by higher receivables and inventory levels linked to the timing of concentrate sales.

Cost Performance Within Guidance Range

Hillgrove reported an All-in Sustaining Cost (AISC) of USD 6.20 per pound of payable copper sold for the March quarter, compared to USD 6.30 per pound in the previous quarter. This places the cost performance within the company’s full-year guidance range of USD 5.75 to USD 6.25 per pound.

On a production basis, AISC was lower at USD 5.65 per pound, reflecting improved cost efficiency when adjusted for shipment timing effects.

Mine operating costs increased slightly by 2% to AUD 39.3 million, primarily due to development activities in the Nugent mining area and higher fuel and transport costs. Despite these pressures, cost management initiatives contributed to maintaining overall cost discipline.

Unit mining costs rose due to a higher proportion of operating development and lower payable copper sales, although the company expects unit costs to decline over time as production rates increase.

Progress on Growth and Exploration Initiatives

Hillgrove continued advancing its growth strategy, with a focus on near-mine exploration opportunities aimed at extending the life and scale of operations.

The Stage 1 Emily Star Exploration Drive was completed during the quarter, enabling more targeted drilling to refine mineralisation data. Diamond drilling at Emily Star commenced shortly after the quarter-end, with a final investment decision for further development expected in the second half of 2026.

Underground drilling efforts totalled over ~17,000 metres during the quarter, with intersections confirming copper-gold mineralisation across key zones, including Nugent and Emily Star. These results support the expansion of the resource base and ongoing refinement of geological models.

Surface drilling activities targeting deeper extensions of the Kavanagh system also progressed, contributing to broader exploration insights.

Additionally, Hillgrove streamlined its tenement portfolio by relinquishing over 2,000 square kilometres of lower-priority exploration ground, allowing the company to focus resources on higher-potential targets.

Additional Value Streams and Strategic Agreements

During the quarter, Hillgrove entered into a tailings processing agreement with Heavy Minerals Limited for the extraction and sale of garnet from its Kanmantoo tailings.

Under the agreement, Hillgrove will receive 15% of gross revenue from garnet sales during operations, with a minimum annual payment of AUD 500,000 once production begins. This could increase to AUD 1 million annually as production scales.

The agreement also provides potential benefits including extending the life of the tailings storage facility and reducing rehabilitation liabilities post-mining.

Operational Outlook and Production Targets

Hillgrove indicated it remains on track to meet its 2026 production and cost guidance, with full-year copper production expected to be in the range of 12,750 to 14,000 tonnes.

The company is also progressing toward a targeted production run rate of 1.7 to 1.8 million tonnes per annum by mid-2026, with longer-term potential to exceed 2 million tonnes per annum supported by exploration success.

Ongoing investments in development and drilling are aligned with these growth objectives, while operational efficiencies are expected to support cost improvements over time.

What This Means for Investors?

Hillgrove’s March quarter update reflects favourable operational momentum, with record production, improving cash flow, and stable cost performance within guidance. The return to positive net group cash flow and strengthening balance sheet position indicate progress in the company’s ramp-up phase.

However, the decline in share price suggests that investors may be focusing on factors such as shipment timing, cost pressures, or broader market sentiment rather than solely on operational achievements.

The combination of increasing production, exploration progress, and additional revenue streams provides a foundation for future growth, though market response indicates that execution consistency and cost trends will remain key areas of focus.