Executive Summary Australia is a major supplier of feedstock to the Asia-Pacific zinc smelting system, but its supply structure is shifting from dominance by a small number of mature mines to a mix of mine closures, volatility at existing operations and ramp-ups at new projects. Glencore's Mount Isa zinc-lead business includes George Fisher and the nearby Lady Loretta mine, which reached the end of its mine life in late 2025. Meanwhile, Dugald River, McArthur River, Rosebery, Century, Cannington and Golden Grove remain the core of zinc concentrate supply from Australia, while newly commissioned or restarted projects such as Federation, Woodlawn and Endeavor have begun contributing incremental output. Zinc mine supply in Australia fell sharply in 2024 due to extreme weather, difficult underground mining conditions and changes in ore sequencing. It recovered in 2025 as McArthur River returned to normal and Dugald River delivered record production. In H1 2026, Glencore's operations in Australia produced 218 kt of zinc in concentrate, down 54 kt year on year, with roughly 51 kt of the reduction attributable to Lady Loretta's closure. Dugald River produced 87.2 kt of zinc in concentrate over the same period, indicating that the overall decline was driven primarily by the exit of a specific mature mine rather than by simultaneous cuts across all core operations. Supply from Australia should therefore be assessed on three horizons. In the short term, the focus is on wet-season disruptions to railways, ports and vessel schedules. Over the medium term, the key issues are the permanent loss of Lady Loretta, Century's approaching tailings-resource limit around 2027 and Cannington's lower operating rates, alongside the ramp-up of Federation, Woodlawn, Endeavor and the Gossan Valley mining front at Golden Grove. Changes in supply from Australia will affect arrivals in China and spot TCs, but the final assessment must also account for global net mine-supply growth and feedstock demand from smelters in China and overseas. I. Zinc Mine Supply in Australia: Mine Closures and New Capacity Ramp-Ups Australia's main zinc mines are located in Queensland, the Northern Territory, Tasmania, New South Wales and Western Australia. Major existing operations include Glencore's Mount Isa zinc-lead business and McArthur River, MMG's Dugald River and Rosebery, Sibanye-Stillwater's Century, South32's Cannington, and 29Metals' Golden Grove. Newly commissioned or restarted projects such as Federation, Woodlawn and Endeavor mean that supply from Australia is no longer determined solely by Mount Isa and Dugald River. The chart shows that Australia's zinc concentrate production has remained relatively high in recent years, although year-to-year volatility has been significant. In 2024, extreme weather at McArthur River and increasingly complex underground mining conditions at Cannington caused a marked decline in supply. McArthur River's recovery and higher production at Dugald River drove a rebound in 2025, before Lady Loretta's closure weighed on output again in 2026. Supply from Australia is therefore not static; it reflects the combined effects of recoveries, declines and additions across individual mines. Performance among existing assets has diverged markedly. Dugald River produced 183.5 kt of zinc in concentrate in 2025, up 12% year on year and a record annual result. MMG's Rosebery produced approximately 48.6 kt over the same period. Century's tailings reprocessing operation produced about 101 kt of payable zinc in concentrate in 2025, although the existing tailings project is approaching a mine-life milestone around 2027. Cannington produced approximately 44.5 kt of payable zinc in FY2025, with guidance of about 40 kt for FY2026 and 43 kt for FY2027, indicating a relatively stable but lower production profile. Lady Loretta's closure has created a confirmed supply loss. Glencore data show that zinc concentrate production in Australia fell 20% year on year in H1 2026, with most of the decline attributable to the mine reaching the end of its life in late 2025. Looking ahead to 2027–2030, supply from Australia will be shaped by offsets between losses and additions. Century faces the gradual depletion of its tailings resource, while Cannington is constrained by more complex underground mining conditions. On the upside, Federation continues to ramp up, Woodlawn has returned to stable production, the Gossan Valley mining front at Golden Grove is expected to deliver first ore in H2 2026, and Endeavor's restart will add supply. Australia's medium-term supply outlook is therefore not a one-way contraction, but rather a period in which retiring mines hand over to new sources of production. II. China's Imports from Australia: Monthly Volatility Does Not Necessarily Signal Mine-Supply Cuts The chart shows that China's imports of zinc concentrate from Australia are highly seasonal and sensitive to shipment schedules. A monthly decline may reflect lower mine output, but it may also result from rail disruptions, delayed port loading, ocean transit times, customs-clearance timing or changes in smelter procurement. A subsequent spike may simply represent delayed cargoes arriving in a later month. Import data should therefore be assessed against at least three sets of information: the gap between miners' production and sales, operating conditions on railways and at ports in northern Australia, and arrival patterns at China's major ports. The low readings in 2024 should not automatically be equated with a lasting production decline. Likewise, the 2026 trend should be assessed primarily on the basis of cumulative imports rather than exaggerated moves in individual months. III. Why Does the Wet Season Affect Zinc Concentrate Exports from Australia? The wet season in northern Australia typically runs from October to April, while the tropical cyclone season lasts from November to April. The 2025–2026 northern wet season was the seventh-wettest on record, with average rainfall of about 684 mm, 44% above the long-term average. Eleven tropical cyclones occurred in the region surrounding Australia during the season. Many zinc mines in Australia are located inland, requiring concentrate to be transported over long distances to port. For example, the Mount Isa mining complex relies on rail links to the Port of Townsville; McArthur River ships through the Bing Bong loading facility; and Century is connected by slurry pipeline to the Port of Karumba. Zinc concentrate from Australia is shipped not only to China but also to South Korea and other overseas smelters. Weather disruptions therefore first affect individual transport corridors before feeding through to the Asia-Pacific spot market. Heavy rainfall and flooding generally affect the market through the following chain: Flooding or cyclones → rail and road disruptions → delayed port loading and vessel schedules → inventory accumulation at mines → delayed and lower arrivals in China In Q1 2026, Dugald River still produced 41.1 kt of zinc concentrate despite flooding and rail disruptions. However, logistics constraints caused concentrate sales to fall short of production, leaving some inventory temporarily stockpiled at the mine. This shows that extreme weather often affects transportation and shipment timing rather than directly impairing mine capacity. Once rail and port operations resume, accumulated concentrate may be shipped in a concentrated wave, allowing China's imports to rebound. Flood impacts are therefore usually temporary and should not automatically be treated as a permanent loss of mine supply from Australia. IV. Why Do Changes in Supply from Australia Affect TCs? Zinc concentrate treatment charges (TCs) are fees paid by miners or concentrate sellers to smelters for processing. They essentially reflect the balance between concentrate supply and smelter demand over a given period. Changes in mine supply and logistics in Australia can alter regional spot-market tightness, but the direction of TCs is not determined by any single country. In general: Ample zinc concentrate supply gives smelters more feedstock options and generally pushes TCs higher; Tight zinc concentrate supply intensifies competition for feedstock and generally pushes TCs lower. Australia is an important source of zinc concentrate for the Asia-Pacific region and the global market. When shipments from Australia are delayed and arrivals in China decline while domestic smelters maintain strong feedstock demand, competition for spot concentrate may intensify and spot TCs may come under short-term pressure. If delayed cargoes subsequently arrive in a concentrated wave, or incremental supply from other regions becomes available in time, the impact may dissipate relatively quickly. At the global mine-supply level, the outlook for 2026 is not a one-way contraction. Kipushi in the Democratic Republic of the Congo produced 70.2 kt of contained zinc in concentrate in Q2, marking a seventh consecutive quarter-on-quarter increase. In Australia, Woodlawn returned to stable production, Federation continued to ramp up and Endeavor's restart added new supply. These gains are being offset by the closure of Lady Loretta, Antamina's shift to a copper-rich, zinc-poor ore sequence, feedstock-blending constraints at Kazzinc and the potential depletion of Century's tailings resource around 2027. Global mine supply is therefore increasingly characterised by simultaneous growth at new mines and declines at mature assets. TC assessments should therefore focus on whether annual net additions are sufficient to offset losses, as well as changes in smelter operating rates in China and overseas. In the short term, the key variables are rail and port conditions in Australia and arrivals in China. Over the medium term, additions from Kipushi, Woodlawn and Federation should be weighed against reductions at Lady Loretta, Antamina and Century. Only by assessing the global mine balance alongside smelter demand can the market determine whether pressure on TCs is temporary or structural. Conclusion Australia's zinc mine supply is moving through a handover between mature and emerging assets. Lady Loretta's closure represents a confirmed loss, while established operations such as Mount Isa's zinc-lead business and McArthur River are expected to focus on stable production. Dugald River remains resilient, and Rosebery, Century, Cannington and Golden Grove continue to underpin existing supply. Meanwhile, newly commissioned and restarted projects are beginning to add incremental tonnes. In the short term, the wet season and flooding mainly affect the timing of China's imports through disruptions to railways, ports and vessel schedules, rather than causing permanent capacity losses. Over the medium term, supply from Australia in 2027–2030 will depend on the balance between potential declines—such as the depletion of Century's resource and Cannington's lower operating rates—and growth from the ramp-up of Federation, Woodlawn, Endeavor and the Gossan Valley mining front at Golden Grove. For TCs, fluctuations in supply from Australia can affect the Asia-Pacific spot market but cannot by themselves determine the long-term global zinc concentrate balance. The market should track mine production and sales in Australia, logistics in northern Australia, China's cumulative imports, developments at overseas mines such as Kipushi, Antamina and Kazzinc, and smelter operating rates in China and overseas. Only if global net mine-supply growth remains insufficient while smelter demand stays high will supply losses in Australia translate into sustained downward pressure on TCs.

[Zinc Ingot Export Window Opening? A Nearly 20-Year Rare Opportunity Reemerges!] As of July 28, LME zinc inventory (including non-registered warrants) had pulled back to 101,800 mt, down about 20,000 mt from mid-June. Amid continued destocking outside China, the LME zinc market structure shifted from contango to backwardation, and the backwardation structure kept widening. On July 28, the LME zinc Cash-3M spread strengthened to $61.09/mt. In stark contrast, zinc consumption in China remained in the traditional off-season, with SMM-reported social inventory of zinc ingots across seven domestic markets holding steady at a high level of around 260,000 mt. The supply-demand patterns in China and overseas clearly diverged, and the SHFE/LME zinc price ratio weakened all the way. Against this backdrop, the long-dormant export window for Chinese zinc ingots reappeared, and discussions in the market about reverse arbitrage involving "buying SHFE zinc, selling LME zinc" noticeably heated up...

Glencore Canada has agreed to sell 21.5 million Osisko Metals common shares to a third party for C$34.3 million. Following the transaction, Glencore’s holding will decline from about 128 million shares, or 14.3% on a non-diluted basis, to about 106 million shares, or 11.9%. Osisko owns the past-producing Pine Point and Gaspé copper-zinc mines in Canada and intends to bring them back into operation. The transaction represents a shareholder-level ownership adjustment only; no update was provided on project financing, construction, restart timing, resources or prospective zinc supply.

The US Forest Service is expected to approve South32’s Hermosa Critical Minerals Project in Arizona. The project, which has received fast-track permitting status from the US government, is set to become the first mining project approved under the Agriculture Department’s expedited review process. Located near the US-Mexico border in southern Arizona, the Hermosa project represents an investment of approximately US$2 billion and hosts one of the world’s largest undeveloped zinc deposits, along with manganese and other critical minerals. US officials said the project will help strengthen domestic critical mineral supply chains and reduce reliance on foreign sources of processed metals. South32 expects Hermosa to reach full production by 2029, providing a significant new source of zinc supply for the US market.

As of June 30, the most-traded SHFE zinc contract closed at 24,350 yuan/mt, down 615 yuan/mt for the month, a decline of 2.46%. June saw SHFE zinc retreat from highs, touching a high of 25,355 yuan/mt early in the month and a low of 23,720 yuan/mt at month-end, with the overall price center pulling back. Entering July, the ore tightness situation in China persists; how will zinc prices perform?

[Imported Zinc Concentrate Market] Overseas ore supply disruptions have persisted recently. Offers for imported ore remained scarce this week, with some heard quoted at around -$80 to -$90/dmt, but smelters held a strong wait-and-see sentiment, keeping overall trading activity sluggish during the week.

[Frequent Market Disruptions Drive SHFE and LME Prices Higher] At the beginning of the week, the tug-of-war between longs and shorts intensified. On the macro front, the Middle East situation remained unresolved and market uncertainty persisted, but the US dollar index retreated from highs. Combined with persistently low zinc ingot inventory outside China, LME zinc maintained a fluctuating trend......

[SMM Morning Meeting Minutes: Weak US Dollar, Zinc Prices Rise Accordingly] Overnight, LME zinc recorded a large bullish candlestick with a long lower shadow, with the middle Bollinger Bands providing support below. The US core PCE price index annual rate in April rose to 3.3%, in line with market expectations...

[Peru's "Gas Shortage" Energy Crisis Disrupts Zinc Concentrates Supply] Due to a rupture in Peru's natural gas pipeline (Megantoni district, Cusco province), the country fell into a "gas shortage" predicament, with electricity production and fuel supply severely affected. State-owned oil company Petroperú plunged into a serious financial crisis, and Peru is facing a severe nationwide energy crisis.

As of April 30, the most-traded SHFE zinc contract closed at 23,645 yuan/mt, up 165 yuan/mt for the month, a gain of 0.7%. Zinc prices rebounded from lows in April, touching a low of 23,430 yuan/mt at the beginning of the month and a high of 24,515 yuan/mt at month-end, though the overall price center pulled back. Heading into May, with the tight domestic ore supply situation persisting, how will zinc prices perform?