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690 employees. In 2022, Northern Star (Pogo) LLC had 610 employees and more than 300 contract employees.

FY25 gold production was 283koz. For the June 2025 quarter, gold sales were 85koz as the mill delivered a record annualised run-rate of 1.6Mtpa. In 2022, the Pogo Mine produced approximately 242,808 ounces of gold from 1,343,965 tons of ore milled.

The processing circuit involves gravity concentration, gold and sulphide flotation, and leaching and adsorption of gold with a leach/carbon-in-pulp (CIP) unit operation. The process plant has a hard rock processing capacity of 1.3Mtpa, which was expanded from 1.0Mtpa in FY22.

The mine utilises four portals to access the underground mining areas.

Mining methods have transitioned from primarily cut-and-fill to mostly longhole stoping with paste filling. Two new portals were successfully developed in the September 2025 quarter for improved ore access and enhanced haulage efficiency. FY26 growth capital expenditure for Pogo is forecast to be in the range of US$60-65 million.

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The Bronzewing Operations are situated within the Yandal Greenstone Belt, 80 kilometres northeast of Leinster, Western Australia. Northern Star Resources acquired the operations in December 2019 through the takeover of Echo Resources. The site was previously on care and maintenance since March 2013. Mining is currently centred on the Orelia open pit, which began pre-production in FY2023 and processed first ore in June 2023. The Orelia pit serves as a high-grade feed source for the expanded Thunderbox mill. The Bronzewing processing plant, which has a milling capacity of up to 1.8 million tonnes per annum, remains on care and maintenance. Production from the Bronzewing Operations is included in the figures for the Thunderbox Operations (TBO).

The Bronzewing processing plant, with a milling capacity of up to 1.8 million tonnes per annum, remains on care and maintenance. Ore from the active Orelia pit is transported to the Thunderbox processing centre.

conventional truck and excavator operation, 200-tonne capacity off-highway road trains

Northern Star is conducting ongoing exploration activities in the Bronzewing district as part of a multi-year strategy to screen the Yandal greenstone belt for new gold resources.

approximately 420 people (fly-in, fly-out)

The Thunderbox Gold Mine, also known as Thunderbox Operations, is located in the Yandal and Agnew-Wiluna Belts in the North Eastern Goldfields of Western Australia. It comprises open pit and underground mines, sourcing ore from Thunderbox underground, D Zone, Otto Bore, and the satellite Orelia open pit. The new Wonder underground mine commenced mining in November 2023.

In the December 2025 quarter, gold sales from the Yandal Production Centre, which includes Thunderbox, were 91,487 ounces.

Thunderbox processing facility, mill

excavator and trucks, conventional truck and shovel methods, mechanised long hole open stoping, processing plant, mill

Wonder underground mine commenced mining in November 2023; Open pit mining at Bannockburn ramping up; Orelia Stage 2 cutback and processing capital at Thunderbox planned for FY26.

The South Kalgoorlie Operations (SKO) are located approximately 35 kilometres south of Kalgoorlie, Western Australia. The operations are 100% owned by Northern Star Resources Ltd., which acquired them in 2018. Mining at SKO is focused on the HBJ (Hampton-Boulder-Jubilee) underground mine. The primary mining method is top-down long hole open stoping (LHOS).

Ore from the South Kalgoorlie Operations is now processed at Northern Star's Kanowna Belle processing facility, located 58 kilometres from the site. The Kanowna Belle plant has a processing capacity of 2 million tonnes per annum and can treat a range of ores through flotation and carbon-in-latch (CIL) circuits.

In 2024, paste fill operations commenced to enable the full extraction of the high-grade Mutooroo North underground lodes. Recent exploration has also identified a new resource area at Mutooroo West.

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Kanowna Belle Operations is part of Northern Star's broader Kalgoorlie Operations. The underground mine has been in operation since 1995. The deposit is categorised as a refractory, Archean lode-gold type deposit. Gold mineralisation is primarily hosted within a large porphyritic granodiorite body and is associated with the Fitzroy Shear Zone. The ore is considered "refractory" as the gold is not easily recoverable through a conventional carbon-in-pulp (CIP) circuit, requiring additional processing via roasting.

The adjacent Kanowna Belle processing plant has an annual throughput capacity of approximately 2 million tonnes.

The adjacent Kanowna Belle processing plant has an annual throughput capacity of approximately 2 million tonnes. The facility is equipped to treat both free-milling and refractory ores, featuring a flotation circuit, a concentrate roaster circuit, and a carbon-in-leach (CIL) circuit. Ore is sourced from the Kanowna Belle and South Kalgoorlie (HBJ) underground mines for processing at the Kanowna Belle mill. The primary mining method is a form of modified open stoping, including longhole open stoping (LHOS), with open stopes backfilled with paste fill created from tailings. The ore is accessed via drives on level spacings of 30 metres.

flotation circuit, a concentrate roaster circuit, and a carbon-in-leach (CIL) circuit

Recent exploration has been successful, with continued drilling at the Joplin system, located less than 300 metres from the active Velvet mining area. Mining commenced at Joplin in the December 2023 quarter. Exploration at Red Hill, 3.5 kilometres east of the processing plant, has also increased the site's Mineral Resources. As of 31 March 2024, a maiden Ore Reserve of 0.6Moz was declared at Red Hill, and the Mineral Resource for Kanowna Belle increased by 0.7Moz to 1.9Moz.

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The Jundee Operations are located 45km northeast of Wiluna in the Northern Goldfields region of Western Australia. The operation is part of Northern Star's Yandal Production Centre. Ore is primarily sourced from the Jundee and Ramone underground mines. Mining at the Julius open pit ceased at the end of 2022.

For fiscal year 2025, Jundee's gold production was 286,000 ounces, and gold sold was 286,000 ounces. In the September 2024 quarter, 640,808 tonnes of ore were mined from underground.

conventional Carbon-in-Leach (CIL) plant with a hard rock processing capacity of approximately 3.0Mtpa

conventional Carbon-in-Leach (CIL) plant, autonomously guided remote-controlled loaders

A new portal and mining area, Griffin, began development in August 2024. Northern Star is implementing a significant renewable energy project at Jundee, which includes 24MW of wind power, 16.9MWp of solar power, and a 12MW / 13.4MWh battery energy storage system. The solar farm and battery system commenced generating electricity in the June quarter of 2024, with the wind turbines scheduled for commissioning in the first half of fiscal year 2025. Mine development has commenced at the Cook-Griffin area, a recent exploration success.

The Hemi Development Project is located 85 kilometres south of Port Hedland in the Pilbara region of Western Australia and is currently under development.

First gold production is now anticipated to be in FY30 or the early 2030s, following a final investment decision targeted for the 2027 financial year. The definitive feasibility study forecast average annual gold production to be 530,000 ounces over the first 10 years.

The project will include a 10 million tonnes per annum (mtpa) processing plant. The processing method will be pressure oxidation (POx), which is considered an emissions-efficient gold extraction option, combined with flotation and carbon-in-leach (CIL) to achieve a high recovery rate of up to 95%.

Key equipment for the processing circuit includes a Superior MKIII 50-65 primary gyratory crusher and two 14MW Premier ball mills. The pressure oxidation process will utilise four FELUWA MULTISAFE double hose-diaphragm pumps.

Northern Star Resources acquired the Hemi Development Project from De Grey Mining through a court-approved Scheme of Arrangement on 5 May 2025. The project has received state environmental approval from the Environmental Protection Authority, with federal approvals still pending. The project's disturbance footprint is up to 5,830 hectares within a 22,194-hectare development envelope. A conceptual study has indicated potential for underground mining to run in parallel with the open-pit operations. Northern Star is undertaking a comprehensive review of the project's data and intends to report updated Mineral Resources and Ore Reserves estimates by May 2026. The previous owner, De Grey Mining, had estimated a capital cost of around $1 billion, which is expected to be updated by Northern Star. An exploration budget of A$225 million is forecast for FY26 across Northern Star's production centres, including Hemi.

approximately 400 people, fly-in, fly-out (FIFO)

The Carosue Dam Operations (CDO) are located 120 kilometres north-east of Kalgoorlie in Western Australia. Acquired by Northern Star Resources in February 2021, commercial gold production recommenced in 2010. Operations include Karari-Dervish underground mines and the Porphyry mining centre (Wallbrook open-pit and Porphyry underground).

FY2023 production: 245,304 ounces of gold. FY2025 guidance: 240,000 ounces of gold. Processing capacity: 4.0 million tonnes per annum.

Conventional carbon-in-leach (CIL) plant with 4.0 Mtpa capacity, including secondary/tertiary crushing, screening, and a ball mill. Underground mining uses long hole open stoping with cemented paste fill.

Hitachi 1900 excavator

Growth capital for Wallbrook open-pit and Enterprise open-pit; new TSF Cell 4 for 10 years of operations; 14MW solar farm project completed.

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The mine and concentrator will produce 380,000 tonnes of spodumene concentrate per year, which will be refined into 50,000 tonnes of battery-quality lithium hydroxide annually. The first ore was mined in December 2022, and the concentrator was commissioned in the second half of 2023, and is now in a ramp-up phase. The Kwinana refinery is expected to deliver its first lithium hydroxide in early 2025. Wesfarmers' share of spodumene concentrate production for the 2024 financial year is expected to be approximately 50,000 tonnes.

The project consists of an open-cut mine and a concentrator. The processing circuit includes primary and secondary crushing, a coarse ore stockpile, tertiary crushing with a High Pressure Grinding Roller (HPGR), Dense Media Separation (DMS), grinding and classification, magnetic separation, froth flotation, and concentrate thickening and filtration. The spodumene concentrate will be transported to a refinery in Kwinana to be processed into battery-quality lithium hydroxide.

Studies are being advanced to potentially expand the Mt Holland mine and concentrator. A feasibility study to evaluate doubling the production capacity of the mine and concentrator has been completed.

The Penco Module is a development-stage rare earths project located in the Biobío Region of Chile. It is an ionic clay, regolith-hosted rare earth element deposit, planned as an open-pit mine. The project is currently in the development and permitting stage, with an anticipated start of operations in 2027.

Expected annual average production of 811 tonnes of total rare earth oxides. A 2021 Preliminary Economic Assessment estimated annual production of around 774 tonnes of rare earth oxides.

Patented processing method called "Circular Mineral Harvesting" involving leaching ionic clays with a common fertiliser, without blasting, crushing, or milling. Designed for high water recirculation (95%) and no tailings dam. A pilot plant has processed 120 tonnes of clay.

truck and shovel/loader operation

The full Carina Project is anticipated to generate over 5,700 direct and indirect jobs, with Aclara committed to creating 3,200 direct jobs.

The Carina Project is focused on the extraction of heavy rare earth elements (HREEs) and light rare earth elements (LREEs) from an ionic clay deposit. The primary magnetic elements to be produced are Dysprosium (Dy), Terbium (Tb), Neodymium and Praseodymium (NdPr).

The project is projected to have an average annual production of 4,265 tonnes of total rare earth oxides (REO), including an average annual output of 149 tonnes of Dysprosium, 25 to 26 tonnes of Terbium, and 1,170 tonnes of Neodymium-Praseodymium.

Aclara will use a patented extraction process known as "Circular Mineral Harvesting". This method uses an ammonium sulfate-based ion exchange to extract rare earth elements. The process is designed to have a minimal environmental footprint, recycling water and using common fertilisers, with no requirement for tailings dams. A pilot plant in Aparecida de Goiânia is currently processing ionic clays to produce heavy rare earth carbonates.

Construction expected to begin in the second half of 2026 and be completed in 2027.

The Bolt Cutter project is an early-stage greenfields exploration project located approximately 10 kilometres west of Wildcat Resources' Tabba Tabba Lithium-Tantalum Project in the Pilbara region. Recent exploration has focused on the 'Bolt Cutter Central' discovery, which consists of swarms of lithium-caesium-tantalum (LCT) pegmatite dykes.

Reverse Circulation and Diamond drilling program

Extensive drilling has significantly expanded the known mineralisation, defining the lithium-bearing pegmatite system over more than 2 kilometres in a north-westerly orientation and up to 800 metres in a north-easterly orientation. The system remains open in most directions. Further RC drilling is planned for Q1 2026 to step out and infill the discovery area in preparation for a maiden Mineral Resource estimate.

The Mt Adrah Gold Project is located in the Lachlan Fold Belt of New South Wales. Wildcat Resources is the current owner of the project. The project's centerpiece is the Hobbs Pipe gold deposit, which has a JORC 2012-compliant Mineral Resource estimate of 20.5 million tonnes at 1.1 g/t gold for 770,000 ounces of contained gold. This deposit demonstrates continuous mineralisation from the surface. In addition to the main Hobbs Pipe deposit, the project also features several high-grade gold reef systems, including the Castor and White Deer Reefs. Historical drilling at these reefs has returned high-grade intercepts, such as 10m at 17.7 g/t Au at Castor Reef and 1.2m at 58.6 g/t Au at White Deer Reef. The project is considered to be under-explored, with systematic exploration having been limited since the 1980s.

Metallurgical test work has indicated gold recoveries of up to 92%.

Recent exploration activities by Wildcat Resources have included a reverse circulation (RC) drilling program in April 2023 to target Hobbs Pipe-style deposits. The company has also been conducting soil sampling, with over 7,000 samples taken regionally, and geophysical studies to define further drill targets. For calendar year 2025, Wildcat has budgeted up to $1.3 million for continued exploration at Mt Adrah.

Advanced development project located on granted Mining Leases 80 kilometres by road from Port Hedland, Western Australia. Acquired by Wildcat Resources Ltd in 2023.

Forecast steady-state production target averages 295,000 tonnes per year of 5.5% Li2O spodumene concentrate during stage one, increasing to 565,000 tonnes per year in stage two.

Metallurgical test work to refine processing flowsheet, potential to produce tantalum concentrate grading above 5.0% Ta2O5. Processing operation expanding from 2.2 Mtpa to 4.5 Mtpa.

Two-stage development plan: Stage one 2.2 Mtpa mining and processing, expanding to 4.5 Mtpa in stage two, incorporating underground ore from year six.

The Lordsburg Lithium Project, operated by Arizona Lithium, is an early-stage exploration project located in the southwest corner of New Mexico, USA. The project consists of 291 Bureau of Land Management (BLM) claims covering approximately 25 square kilometres. It is situated within a playa lake system in the Animas Valley, about 15 kilometres southwest of the town of Lordsburg.

Previous operator estimates were for 800 jobs during construction and 200 jobs during operations.

A 2019 drill program resulted in an estimated JORC-compliant resource of 32.5 million tonnes grading 1,850 parts per million lithium, for 320,800 tonnes of lithium carbonate equivalent.

The project plan involved shallow surface mining with continuous reclamation.

Development currently suspended due to legal injunction; plan of operations withdrawn by Arizona Lithium in February 2025; project subsequently sold to NTEC on 4 August 2025.

The project is designed for a mining and processing capacity of 5 million tonnes of ore per annum. The processing plant will produce 500,000 tonnes of spodumene concentrate per year, which will be processed further in a smelter to produce 95,170 tonnes of crude lithium sulfate annually.

primary jaw crusher, secondary cone crusher, and a high-pressure grinding rolls (HPGR) tertiary crusher

Construction is underway, with the accommodation camp and the first phase of a solar farm already commissioned. The project also includes the rehabilitation of the Mpiana-Mwanga hydroelectric power station to supply power to the operation.