{"success":true,"data":{"pressRelease":{"id":"150246","rtpr_id":"nBwbv7Dsya-20260922","ticker":"CDE","exchange":"NYSE","all_tickers":["CDE"],"title":"Coeur Provides Exploration Update for New Afton and Rainy River","author":"Business Wire","published_at":"2026-09-22T20:30:00.150Z","article_body":"Coeur Provides Exploration Update for New Afton and Rainy River\n\nAccelerated programs unlocking significant mine life extension potential at\nits recently acquired Canadian assets\n\nCoeur Mining, Inc. (“Coeur” or the “Company”) (NYSE, TSX: CDE) today\nprovided an update on recent exploration activities at its New Afton and Rainy\nRiver operations in Canada.\n\nThis press release features multimedia. View the full release here:\nhttps://www.businesswire.com/news/home/20260922510800/en/\n(https://www.businesswire.com/news/home/20260922510800/en/)\n\nFigure 1: Northwest slice through the New Afton deposit(s) highlighting K-Zone\nand significant 2026 drill intercepts (>0.36 g/t AuEq⁵)\n\nCoeur is expected to invest a record $158 million(1) in exploration in 2026,\nmore than double 2025 levels, which includes exploration investments of\napproximately $24 million(2) at New Afton and $18 million(2) at Rainy River.\nThe combined programs at these recently acquired Canadian assets represent a\ndouble-digit increase in investment levels as compared to 2025, reflecting\nCoeur’s confidence in the long-term growth opportunities at both operations.\n\nNew Afton Mine: K-Zone Continues to Expand\n\nCoeur continues to focus its exploration efforts at the K-Zone deposit,\nbuilding on the maiden mineral resource of 48 million tonnes of measured and\nindicated resources and 6 million tonnes of inferred resources announced on\nMarch 23, 2026. New Afton’s 2025 proven and probable reserves totaled 36\nmillion tonnes containing 780,000 ounces of gold at an average grade of 0.67\ngrams per tonne and 591 million pounds of copper at an average grade of 0.74%.\n\nThe infill drilling portion of the 2026 program has confirmed existing\nmineralization and outlined the potential for future upside to overall grades\nat K-Zone. The expansion drilling portion of this year’s program has\nextended mineralization by more than 300 meters beyond the original footprint\nof approximately 850 meters.\n\nAreas of recent growth at K-Zone have been mainly to the west and to the\nsoutheast. In the western portion of K-Zone (see Figures 1 and 2), previously\nreferred to as the D-Zone Gap, mineralization has been extended by\napproximately 150 meters, with results confirming strong copper-gold\nmineralization between D-Zone and K-Zone. At the East Picrite Trend, drilling\nhas extended the mineralized system by at least 100 meters to the southeast,\nreturning broad, higher-than-expected mineralized intercepts that represent\npotential for further mineralization growth.\n\nWith western K-Zone drilling now complete, exploration will shift to the east,\nnortheast and southeast areas. An underground exploration drift currently\nbeing developed is expected to provide access to test drill up to 450 meters\nof additional strike potential (see Figure 2).\n\nIntercept highlights include (true widths)(3):\n\nK-Zone:\n\n\n * 26.3 meters at 1.8 grams per tonne (“g/t”) gold and 1.84% copper and 20.0\nmeters at 0.6 g/t gold and 1.26% copper (EA26-631)\n\n * 23.6 meters at 2.0 g/t gold and 2.00% copper and 33.4 meters at 0.3 g/t gold\nand 0.77% copper (EA26-641)\n\n * 175.8 meters at 0.5 g/t gold and 0.88% copper (EA26-624)\n\n * 33.1 meters at 1.5 g/t gold and 1.40% copper (EA26-644)\n\n * 23.6 meters at 0.6 g/t gold and 1.15% copper and 23.9 meters at 0.2 g/t gold\nand 0.26% copper (EA26-628)\n\n * 30.7 meters at 0.7 g/t gold and 0.69% copper and 11.5 meters at 0.3 g/t gold\nand 0.51% copper (EA26-632)\n\nEast Picrite Trend:\n\n\n * 124.6 meters at 1.1 g/t gold and 1.25% copper and 29.8 meters at 0.7 g/t gold\nand 1.00% copper (EA26-623)\n\n * 64.1 meters at 1.1 g/t gold and 1.36% copper (EA26-630B)\n\n * 88.6 meters at 1.0 g/t gold and 1.44% copper (EA25-569B)\n\n * 68.7 meters at 1.0 g/t gold and 1.49% copper and 39.5 meters at 0.3 g/t gold\nand 0.25% copper (EA26-640)\n\nRainy River: Strong Open Pit and Underground Growth Potential\n\nExploration at Rainy River continues to demonstrate significant growth\npotential across both underground and near-surface targets. In 2026,\nunderground drilling is focused on extending and infill drilling higher-grade\nshoots and testing gaps between existing shoots, while surface drilling is\ntargeting open pit growth opportunities between the Phase 5 and Northwest\nTrend (“NWT”) pits (see Figures 3 and 4), and regional exploration\nprograms have resumed.\n\nExpansion drilling has extended multiple underground mineralized zones,\nincluding the ODM Main Zone by more than 150 meters and Zone 17 by more than\n200 meters down-plunge. At Intrepid, mineralization was extended 40 meters to\nthe east along a 200-meter plunge extent. All underground zones remain open at\ndepth (see Figure 3).\n\nInfill drilling aimed at converting underground inferred mineral resources was\ncompleted across a significant 275 meter by 150 meter gap in the core of the\nODM Main Zone, while also infilling other key underground zones including Zone\n17 and the HS and 433 areas. The positive results are expected to support the\npotential upgrade of mineral resource classification from inferred to measured\nand indicated at year-end.\n\nSurface reverse circulation (“RC”) drilling tested the continuation of\nmineralization both between and adjacent to the planned NWT and Phase 5 pits,\nwith results supporting the potential for future open-pit connectivity between\nthese areas.\n\nThese results reinforce Rainy River’s potential to expand both underground\nand open-pit mineral resources, while supporting mine-life extension and\nfuture production flexibility.\n\nIntercept highlights include (true widths)(3):\n\nODM Main Zone – Underground Expansion:\n\n\n * 8.1 meters at 14.8 g/t gold and 3 g/t silver (RR26-2119B)\n\n * 7.9 meters at 10.8 g/t gold and 5 g/t silver (RR26-2123)\n\n * 5.8 meters at 3.6 g/t gold and 7 g/t silver (RR26-2108-W2)\n\nZone 17 – Underground Expansion:\n\n\n * 5.8 meters at 43.6 g/t gold and 13 g/t silver (RR26-2110-W1A)\n\n * 10.5 meters at 5.6 g/t gold and 1 g/t silver (RR26-2109-W1)\n\n * 11.6 meters at 1.8 g/t gold and 3 g/t silver (RR26-2109)\n\nODM Main Zone – Underground Infill:\n\n\n * 4.3 meters at 10.3 g/t gold and 5 g/t silver (RR26-2112-W2)\n\n * 13.4 meters at 1.8 g/t gold and 1 g/t silver (RR26-2113)\n\n * 3.3 meters at 12.9 g/t gold and 3 g/t silver (RR25-2081-W1)\n\nNWT and Phase 5 – Open Pit Infill:\n\n\n * 6.0 meters at 4.8 g/t gold (RC26-025)\n\n * 15.8 meters at 1.1 g/t gold (RC26-015)\n\n * 11.6 meters at 0.7 g/t gold (RC26-008)\n\n“These results underscore the excellent growth potential within our newly\nacquired Canadian operations,” said Aoife McGrath, Executive Vice President,\nExploration. “At New Afton, Coeur is advancing the K-Zone, one of its most\ncompelling growth opportunities within the portfolio. Since the acquisition,\nexploration at K-Zone has continued to deliver strong results, confirming the\nexisting mineral resource while extending the mineralized system well beyond\nthe original footprint. With dedicated underground development providing\naccess to new exploration fronts, we see considerable runway for further\nexpansion and value creation. At Rainy River, ongoing expansion and infill\ndrilling continue to demonstrate the opportunity to grow both underground and\nopen-pit mineral resources, while regional programs continue to refine future\ndrill targets. These results reinforce our confidence in extending mine life\nand creating long-term value at both operations.”\n\nFor a complete table of all drill results, please refer to the following link:\nhttps://www.coeur.com/New-Afton-and-Rainy-River-Exploration-Appendix/\n(https://cts.businesswire.com/ct/CT?id=smartlink&url=https%3A%2F%2Fwww.coeur.com%2FNew-Afton-and-Rainy-River-Exploration-Appendix%2F&esheet=54608656&newsitemid=20260922510800&lan=en-US&anchor=https%3A%2F%2Fwww.coeur.com%2FNew-Afton-and-Rainy-River-Exploration-Appendix%2F&index=1&md5=a92646135ffdf4d8f2ec5be698291dcf)\n. Please see the “Cautionary Statements” section for additional\ninformation regarding drill results.\n\nNew Afton Mine, British Columbia\n\nCoeur’s $24 million(2) 2026 exploration budget at New Afton includes 68\nkilometers of core drilling, primarily focused on expanding and upgrading the\nmaiden K-Zone mineral resource (see Figure 1), which was released in March\n2026 with measured and indicated and inferred mineral resources of 48 million\ntonnes and 6 million tonnes, respectively. The additional core drilling is\nexpected to support ongoing engineering studies related to its development.\n\nSince the discovery of K-Zone in late 2023, over 109 kilometers of core\ndrilling have been completed, which has grown the deposit(4) to more than\n1,100 meters along strike and 1,100 meters vertically. The rapid progression\nfrom discovery to substantial mineral resource underscores the significant\ngrowth potential near existing underground infrastructure.\n\nRainy River Mine, Ontario\n\nUnderground Zones Extended Down-Plunge; Core of ODM Main Zone Infilled\n\nThe $18 million(2) 2026 exploration budget at Rainy River is focused on\ngrowing and converting underground and open pit mineral resources, while\ninitiating regional exploration activities. A total of approximately 64\nkilometers of core drilling targeting underground mineralization is planned\nfor full-year 2026, with 43 kilometers completed across 51 holes as of August\n30, 2026. Key takeaways from the programs include:\n\nExpansion Drilling\n\n\n * Zone 17: Down-plunge drilling has extended mineralization over 200 meters\nbelow current mineral resource\n\n * ODM Main Zone: Down-plunge drilling along the eastern portion of the zone has\nextended mineralization over 150 meters below the current mineral resource\n\n * Intrepid: Step-out drilling has extended the eastern portion of mineralization\nlaterally by approximately 40 meters and down plunge by more than 200 meters\n\n * 114 Zone – Phase 5: Core drilling within the 114 Zone below the Phase 5 pit\nand current mineral resource has identified additional mineralization that\nremains open at depth\n\nInfill Drilling\n\n\n * ODM Main Zone: Infilled a 275 by 150 meter gap of inferred mineralization to\nsupport future mineral resource conversion\n\n * Zone 17 & HS/433: Further delineated and expanded mineralized zones. The\nHS/433 mineralization occurs as subparallel stacked lenses north of the ODM\nMain Zone (see plan view on top of Figure 3)\n\nCore drilling for the remainder of the year is expected to continue advancing\nthese expansion and infill programs, in addition to testing for new\nunderground mineralization between existing ore shoots.\n\nNear-Surface Mineralization Extended Beyond Current Open-Pit Footprint\n\nIn 2026, a 24-hole, 3,863 meter near-surface RC drilling program successfully\ntargeted the saddle between the planned Northwest Trend and Phase 5 pits. A\ntotal of 12 of the 24 drill holes intersected mineralization that met or\nexceeded expectations. The program aimed to test mineralization continuity\nbeyond the main orebody footprint and to support the evaluation of potential\npit expansions through pit optimization and strip ratio improvements.\n\nAdditionally, regional exploration programs are in progress across Rainy\nRiver’s approximately 41,800-hectare property to evaluate mineral potential.\nEarly-stage exploration programs underway include property-scale till\nsampling, geophysical surveys (mobile magnetotellurics), geological mapping,\nand prospecting. Results are expected to inform 2027 exploration targeting and\nregional core drilling.\n\nOngoing success across both underground and open-pit core drilling programs\nreinforces Rainy River’s long-term growth potential. These programs continue\nto demonstrate strong mineralization continuity across key zones while\nsupporting engineering evaluations of open-pit and underground expansion\nopportunities.\n\nAbout Coeur\n\nCoeur Mining, Inc. is a U.S.-based, well-diversified, growing precious metals\nproducer with seven wholly-owned operations: the New Afton gold-copper mine in\nBritish Columbia, Canada, the Rainy River gold-silver mine in Ontario, Canada,\nthe Las Chispas silver-gold mine in Sonora, Mexico, the Palmarejo gold-silver\nmine in Chihuahua, Mexico, the Rochester silver-gold mine in Nevada, the\nKensington gold mine in Alaska and the Wharf gold mine in South Dakota. In\naddition, the Company wholly-owns the Silvertip polymetallic critical minerals\nexploration project in British Columbia, Canada.\n\nCautionary Statements\n\nThis news release contains forward-looking statements within the meaning of\nsecurities legislation in the United States and Canada, including statements\nregarding mineral reserve and mineral resource estimates, exploration efforts\nand plans, growth, mine lives, mine expansion and development plans, and\nresource delineation, expansion, and upgrade or conversion. Such\nforward-looking statements involve known and unknown risks, uncertainties, and\nother factors that may cause Coeur’s actual results, performance, or\nachievements to be materially different from any future results, performance,\nor achievements expressed or implied by the forward-looking statements. Such\nfactors include, among others, the risk that anticipated additions or upgrades\nto reserves and resources are not attained, the risk that planned exploration\nprograms may be curtailed or canceled due to budget constraints or other\nreasons, the risks and hazards inherent in the mining business (including\nrisks inherent in developing large-scale mining projects, environmental\nhazards, industrial accidents, weather or geologically related conditions),\nchanges in the market prices of gold, silver, and copper, and a sustained\nlower price environment, the uncertainties inherent in Coeur’s production,\nexploratory, and developmental activities, including risks relating to\npermitting and regulatory delays, ground conditions, grade and recovery\nvariability, any future labor disputes or work stoppages, the uncertainties\ninherent in the estimation of mineral reserves and mineral resources, the\npotential effects of pandemics or epidemics, including impacts to the\navailability of our workforce, continued access to financing sources,\ngovernment orders that may require temporary suspension of operations at one\nor more of our sites and effects on our suppliers or the refiners and smelters\nto whom the Company markets its production, changes that could result from\nCoeur’s future acquisition of new mining properties or businesses, the loss\nof any third-party smelter to which Coeur markets its production, the effects\nof environmental and other governmental regulations, the risks inherent in the\nownership or operation of or investment in mining properties or businesses in\nforeign countries, Coeur’s ability to raise additional financing necessary\nto conduct its business, make payments, or refinance its debt, as well as\nother uncertainties and risk factors set out in filings made from time to time\nwith the United States Securities and Exchange Commission and the Canadian\nsecurities regulators, including, without limitation, Coeur’s most recent\nreports on Form 10-K and Form 10-Q. Actual results, developments, and\ntimetables could vary significantly from the estimates presented. Readers are\ncautioned not to put undue reliance on forward-looking statements. Coeur\ndisclaims any intent or obligation to update publicly such forward-looking\nstatements, whether as a result of new information, future events, or\notherwise. Additionally, Coeur undertakes no obligation to comment on\nanalyses, expectations, or statements made by third parties in respect of\nCoeur, its financial or operating results, or its securities.\n\nThe scientific and technical information concerning our mineral projects in\nthis news release has been reviewed and approved by a “qualified person”\nunder Item 1300 of Regulation S-K under the Securities Exchange Act of 1934,\nas amended (“SK 1300”), namely our Senior Vice President, Technical\nServices, Christopher Pascoe. For a description of the key assumptions,\nparameters, and methods used to estimate mineral reserves and mineral\nresources for Coeur’s material properties included in this news release, as\nwell as data verification procedures and a general discussion of the extent to\nwhich the estimates may be affected by any known environmental, permitting,\nlegal, title, taxation, sociopolitical, marketing, or other relevant factors,\nplease review the Technical Report Summaries for each of the Company’s\nmaterial properties, which are available at www.sec.gov\n(https://cts.businesswire.com/ct/CT?id=smartlink&url=https%3A%2F%2Fwww.sec.gov&esheet=54608656&newsitemid=20260922510800&lan=en-US&anchor=www.sec.gov&index=2&md5=f57a5e9b5f9c247051e436acec7d7302)\n.\n\nNotes\n\nThe ranges of potential tonnage and grade (or quality) of the exploration\nresults described in this news release are conceptual in nature. There has\nbeen insufficient exploration work to estimate a mineral resource. It is\nuncertain if further exploration will result in the estimation of a mineral\nresource. The exploration results described in this news release therefore do\nnot represent, and should not be construed to be, an estimate of a mineral\nresource or mineral reserve. For additional information regarding 2025 mineral\nreserves and mineral resources, see\nhttps://www.coeur.com/operations/operations/reserves-resources/\n(https://cts.businesswire.com/ct/CT?id=smartlink&url=https%3A%2F%2Fwww.coeur.com%2Foperations%2Foperations%2Freserves-resources%2F&esheet=54608656&newsitemid=20260922510800&lan=en-US&anchor=https%3A%2F%2Fwww.coeur.com%2Foperations%2Foperations%2Freserves-resources%2F&index=3&md5=3540734d97a7fc6659b5f471733c9ed6)\n.\n\n\n 1. Figure reflects the midpoint of guidance as published by Coeur on August 5,\n2026.\n\n 2. Full-year planned total(s) include exploration spending and core drilling\namounts in early 2026 prior to Coeur’s acquisition of New Gold Inc. on March\n20, 2026. The amounts included from pre-acquisition are approximately $4\nmillion of exploration spending and 19 kilometers of drilling at New Afton and\n$3 million of exploration spending and 16 kilometers of drilling at Rainy\nRiver.\n\n 3. All drill intervals are estimated true widths. Rounding of grades, to\nsignificant figures, may result in apparent differences. For a complete table\nof all drill results included in this release, please refer to the following\nlink: \nhttps://www.coeur.com/New-Afton-and-Rainy-River-Exploration-Appendix\n(https://cts.businesswire.com/ct/CT?id=smartlink&url=https%3A%2F%2Fwww.coeur.com%2FNew-Afton-and-Rainy-River-Exploration-Appendix%2F&esheet=54608656&newsitemid=20260922510800&lan=en-US&anchor=https%3A%2F%2Fwww.coeur.com%2FNew-Afton-and-Rainy-River-Exploration-Appendix&index=4&md5=1ce58a84171ca2486acbdff301c537f9)\n\n.\n\n 4. As defined by the 0.18 g/t gold equivalent (“AuEq”)( )envelope.\n\n 5. Gold equivalent calculation assumes a gold-to-copper conversion ratio of 1 oz\nAu to 600 lb Cu.\n Conversion Table                      \n 1 short ton =   0.907185 metric tons  \n 1 troy ounce =  31.10348 grams        \n\n\n \n\n\n\nView source version on businesswire.com:\nhttps://www.businesswire.com/news/home/20260922510800/en/\n(https://www.businesswire.com/news/home/20260922510800/en/)\n\nFor Additional Information \n\nCoeur Mining, Inc.\n\n200 S. Wacker Drive, Suite 2100\n\nChicago, Illinois 60606\n\nAttention: Jeff Wilhoit, Vice President, Investor Relations\n\nPhone: (312) 489-5800\n\nwww.coeur.com\n(https://cts.businesswire.com/ct/CT?id=smartlink&url=http%3A%2F%2Fwww.coeur.com&esheet=54608656&newsitemid=20260922510800&lan=en-US&anchor=www.coeur.com&index=5&md5=1a0ee52bc92d37e52e377468bac3634b)\n\n\nCopyright Business Wire 2026","article_body_html":"","raw_payload":{"data":{"id":"nBwbv7Dsya-20260922","title":"Coeur Provides Exploration Update for New Afton and Rainy River","author":"Business Wire","ticker":"CDE","created":"2026-09-22T20:30:00.150Z","tickers":["CDE"],"exchange":"NYSE","article_body":"Coeur Provides Exploration Update for New Afton and Rainy River\n\nAccelerated programs unlocking significant mine life extension potential at\nits recently acquired Canadian assets\n\nCoeur Mining, Inc. (“Coeur” or the “Company”) (NYSE, TSX: CDE) today\nprovided an update on recent exploration activities at its New Afton and Rainy\nRiver operations in Canada.\n\nThis press release features multimedia. View the full release here:\nhttps://www.businesswire.com/news/home/20260922510800/en/\n(https://www.businesswire.com/news/home/20260922510800/en/)\n\nFigure 1: Northwest slice through the New Afton deposit(s) highlighting K-Zone\nand significant 2026 drill intercepts (>0.36 g/t AuEq⁵)\n\nCoeur is expected to invest a record $158 million(1) in exploration in 2026,\nmore than double 2025 levels, which includes exploration investments of\napproximately $24 million(2) at New Afton and $18 million(2) at Rainy River.\nThe combined programs at these recently acquired Canadian assets represent a\ndouble-digit increase in investment levels as compared to 2025, reflecting\nCoeur’s confidence in the long-term growth opportunities at both operations.\n\nNew Afton Mine: K-Zone Continues to Expand\n\nCoeur continues to focus its exploration efforts at the K-Zone deposit,\nbuilding on the maiden mineral resource of 48 million tonnes of measured and\nindicated resources and 6 million tonnes of inferred resources announced on\nMarch 23, 2026. New Afton’s 2025 proven and probable reserves totaled 36\nmillion tonnes containing 780,000 ounces of gold at an average grade of 0.67\ngrams per tonne and 591 million pounds of copper at an average grade of 0.74%.\n\nThe infill drilling portion of the 2026 program has confirmed existing\nmineralization and outlined the potential for future upside to overall grades\nat K-Zone. The expansion drilling portion of this year’s program has\nextended mineralization by more than 300 meters beyond the original footprint\nof approximately 850 meters.\n\nAreas of recent growth at K-Zone have been mainly to the west and to the\nsoutheast. In the western portion of K-Zone (see Figures 1 and 2), previously\nreferred to as the D-Zone Gap, mineralization has been extended by\napproximately 150 meters, with results confirming strong copper-gold\nmineralization between D-Zone and K-Zone. At the East Picrite Trend, drilling\nhas extended the mineralized system by at least 100 meters to the southeast,\nreturning broad, higher-than-expected mineralized intercepts that represent\npotential for further mineralization growth.\n\nWith western K-Zone drilling now complete, exploration will shift to the east,\nnortheast and southeast areas. An underground exploration drift currently\nbeing developed is expected to provide access to test drill up to 450 meters\nof additional strike potential (see Figure 2).\n\nIntercept highlights include (true widths)(3):\n\nK-Zone:\n\n\n * 26.3 meters at 1.8 grams per tonne (“g/t”) gold and 1.84% copper and 20.0\nmeters at 0.6 g/t gold and 1.26% copper (EA26-631)\n\n * 23.6 meters at 2.0 g/t gold and 2.00% copper and 33.4 meters at 0.3 g/t gold\nand 0.77% copper (EA26-641)\n\n * 175.8 meters at 0.5 g/t gold and 0.88% copper (EA26-624)\n\n * 33.1 meters at 1.5 g/t gold and 1.40% copper (EA26-644)\n\n * 23.6 meters at 0.6 g/t gold and 1.15% copper and 23.9 meters at 0.2 g/t gold\nand 0.26% copper (EA26-628)\n\n * 30.7 meters at 0.7 g/t gold and 0.69% copper and 11.5 meters at 0.3 g/t gold\nand 0.51% copper (EA26-632)\n\nEast Picrite Trend:\n\n\n * 124.6 meters at 1.1 g/t gold and 1.25% copper and 29.8 meters at 0.7 g/t gold\nand 1.00% copper (EA26-623)\n\n * 64.1 meters at 1.1 g/t gold and 1.36% copper (EA26-630B)\n\n * 88.6 meters at 1.0 g/t gold and 1.44% copper (EA25-569B)\n\n * 68.7 meters at 1.0 g/t gold and 1.49% copper and 39.5 meters at 0.3 g/t gold\nand 0.25% copper (EA26-640)\n\nRainy River: Strong Open Pit and Underground Growth Potential\n\nExploration at Rainy River continues to demonstrate significant growth\npotential across both underground and near-surface targets. In 2026,\nunderground drilling is focused on extending and infill drilling higher-grade\nshoots and testing gaps between existing shoots, while surface drilling is\ntargeting open pit growth opportunities between the Phase 5 and Northwest\nTrend (“NWT”) pits (see Figures 3 and 4), and regional exploration\nprograms have resumed.\n\nExpansion drilling has extended multiple underground mineralized zones,\nincluding the ODM Main Zone by more than 150 meters and Zone 17 by more than\n200 meters down-plunge. At Intrepid, mineralization was extended 40 meters to\nthe east along a 200-meter plunge extent. All underground zones remain open at\ndepth (see Figure 3).\n\nInfill drilling aimed at converting underground inferred mineral resources was\ncompleted across a significant 275 meter by 150 meter gap in the core of the\nODM Main Zone, while also infilling other key underground zones including Zone\n17 and the HS and 433 areas. The positive results are expected to support the\npotential upgrade of mineral resource classification from inferred to measured\nand indicated at year-end.\n\nSurface reverse circulation (“RC”) drilling tested the continuation of\nmineralization both between and adjacent to the planned NWT and Phase 5 pits,\nwith results supporting the potential for future open-pit connectivity between\nthese areas.\n\nThese results reinforce Rainy River’s potential to expand both underground\nand open-pit mineral resources, while supporting mine-life extension and\nfuture production flexibility.\n\nIntercept highlights include (true widths)(3):\n\nODM Main Zone – Underground Expansion:\n\n\n * 8.1 meters at 14.8 g/t gold and 3 g/t silver (RR26-2119B)\n\n * 7.9 meters at 10.8 g/t gold and 5 g/t silver (RR26-2123)\n\n * 5.8 meters at 3.6 g/t gold and 7 g/t silver (RR26-2108-W2)\n\nZone 17 – Underground Expansion:\n\n\n * 5.8 meters at 43.6 g/t gold and 13 g/t silver (RR26-2110-W1A)\n\n * 10.5 meters at 5.6 g/t gold and 1 g/t silver (RR26-2109-W1)\n\n * 11.6 meters at 1.8 g/t gold and 3 g/t silver (RR26-2109)\n\nODM Main Zone – Underground Infill:\n\n\n * 4.3 meters at 10.3 g/t gold and 5 g/t silver (RR26-2112-W2)\n\n * 13.4 meters at 1.8 g/t gold and 1 g/t silver (RR26-2113)\n\n * 3.3 meters at 12.9 g/t gold and 3 g/t silver (RR25-2081-W1)\n\nNWT and Phase 5 – Open Pit Infill:\n\n\n * 6.0 meters at 4.8 g/t gold (RC26-025)\n\n * 15.8 meters at 1.1 g/t gold (RC26-015)\n\n * 11.6 meters at 0.7 g/t gold (RC26-008)\n\n“These results underscore the excellent growth potential within our newly\nacquired Canadian operations,” said Aoife McGrath, Executive Vice President,\nExploration. “At New Afton, Coeur is advancing the K-Zone, one of its most\ncompelling growth opportunities within the portfolio. Since the acquisition,\nexploration at K-Zone has continued to deliver strong results, confirming the\nexisting mineral resource while extending the mineralized system well beyond\nthe original footprint. With dedicated underground development providing\naccess to new exploration fronts, we see considerable runway for further\nexpansion and value creation. At Rainy River, ongoing expansion and infill\ndrilling continue to demonstrate the opportunity to grow both underground and\nopen-pit mineral resources, while regional programs continue to refine future\ndrill targets. These results reinforce our confidence in extending mine life\nand creating long-term value at both operations.”\n\nFor a complete table of all drill results, please refer to the following link:\nhttps://www.coeur.com/New-Afton-and-Rainy-River-Exploration-Appendix/\n(https://cts.businesswire.com/ct/CT?id=smartlink&url=https%3A%2F%2Fwww.coeur.com%2FNew-Afton-and-Rainy-River-Exploration-Appendix%2F&esheet=54608656&newsitemid=20260922510800&lan=en-US&anchor=https%3A%2F%2Fwww.coeur.com%2FNew-Afton-and-Rainy-River-Exploration-Appendix%2F&index=1&md5=a92646135ffdf4d8f2ec5be698291dcf)\n. Please see the “Cautionary Statements” section for additional\ninformation regarding drill results.\n\nNew Afton Mine, British Columbia\n\nCoeur’s $24 million(2) 2026 exploration budget at New Afton includes 68\nkilometers of core drilling, primarily focused on expanding and upgrading the\nmaiden K-Zone mineral resource (see Figure 1), which was released in March\n2026 with measured and indicated and inferred mineral resources of 48 million\ntonnes and 6 million tonnes, respectively. The additional core drilling is\nexpected to support ongoing engineering studies related to its development.\n\nSince the discovery of K-Zone in late 2023, over 109 kilometers of core\ndrilling have been completed, which has grown the deposit(4) to more than\n1,100 meters along strike and 1,100 meters vertically. The rapid progression\nfrom discovery to substantial mineral resource underscores the significant\ngrowth potential near existing underground infrastructure.\n\nRainy River Mine, Ontario\n\nUnderground Zones Extended Down-Plunge; Core of ODM Main Zone Infilled\n\nThe $18 million(2) 2026 exploration budget at Rainy River is focused on\ngrowing and converting underground and open pit mineral resources, while\ninitiating regional exploration activities. A total of approximately 64\nkilometers of core drilling targeting underground mineralization is planned\nfor full-year 2026, with 43 kilometers completed across 51 holes as of August\n30, 2026. Key takeaways from the programs include:\n\nExpansion Drilling\n\n\n * Zone 17: Down-plunge drilling has extended mineralization over 200 meters\nbelow current mineral resource\n\n * ODM Main Zone: Down-plunge drilling along the eastern portion of the zone has\nextended mineralization over 150 meters below the current mineral resource\n\n * Intrepid: Step-out drilling has extended the eastern portion of mineralization\nlaterally by approximately 40 meters and down plunge by more than 200 meters\n\n * 114 Zone – Phase 5: Core drilling within the 114 Zone below the Phase 5 pit\nand current mineral resource has identified additional mineralization that\nremains open at depth\n\nInfill Drilling\n\n\n * ODM Main Zone: Infilled a 275 by 150 meter gap of inferred mineralization to\nsupport future mineral resource conversion\n\n * Zone 17 & HS/433: Further delineated and expanded mineralized zones. The\nHS/433 mineralization occurs as subparallel stacked lenses north of the ODM\nMain Zone (see plan view on top of Figure 3)\n\nCore drilling for the remainder of the year is expected to continue advancing\nthese expansion and infill programs, in addition to testing for new\nunderground mineralization between existing ore shoots.\n\nNear-Surface Mineralization Extended Beyond Current Open-Pit Footprint\n\nIn 2026, a 24-hole, 3,863 meter near-surface RC drilling program successfully\ntargeted the saddle between the planned Northwest Trend and Phase 5 pits. A\ntotal of 12 of the 24 drill holes intersected mineralization that met or\nexceeded expectations. The program aimed to test mineralization continuity\nbeyond the main orebody footprint and to support the evaluation of potential\npit expansions through pit optimization and strip ratio improvements.\n\nAdditionally, regional exploration programs are in progress across Rainy\nRiver’s approximately 41,800-hectare property to evaluate mineral potential.\nEarly-stage exploration programs underway include property-scale till\nsampling, geophysical surveys (mobile magnetotellurics), geological mapping,\nand prospecting. Results are expected to inform 2027 exploration targeting and\nregional core drilling.\n\nOngoing success across both underground and open-pit core drilling programs\nreinforces Rainy River’s long-term growth potential. These programs continue\nto demonstrate strong mineralization continuity across key zones while\nsupporting engineering evaluations of open-pit and underground expansion\nopportunities.\n\nAbout Coeur\n\nCoeur Mining, Inc. is a U.S.-based, well-diversified, growing precious metals\nproducer with seven wholly-owned operations: the New Afton gold-copper mine in\nBritish Columbia, Canada, the Rainy River gold-silver mine in Ontario, Canada,\nthe Las Chispas silver-gold mine in Sonora, Mexico, the Palmarejo gold-silver\nmine in Chihuahua, Mexico, the Rochester silver-gold mine in Nevada, the\nKensington gold mine in Alaska and the Wharf gold mine in South Dakota. In\naddition, the Company wholly-owns the Silvertip polymetallic critical minerals\nexploration project in British Columbia, Canada.\n\nCautionary Statements\n\nThis news release contains forward-looking statements within the meaning of\nsecurities legislation in the United States and Canada, including statements\nregarding mineral reserve and mineral resource estimates, exploration efforts\nand plans, growth, mine lives, mine expansion and development plans, and\nresource delineation, expansion, and upgrade or conversion. Such\nforward-looking statements involve known and unknown risks, uncertainties, and\nother factors that may cause Coeur’s actual results, performance, or\nachievements to be materially different from any future results, performance,\nor achievements expressed or implied by the forward-looking statements. Such\nfactors include, among others, the risk that anticipated additions or upgrades\nto reserves and resources are not attained, the risk that planned exploration\nprograms may be curtailed or canceled due to budget constraints or other\nreasons, the risks and hazards inherent in the mining business (including\nrisks inherent in developing large-scale mining projects, environmental\nhazards, industrial accidents, weather or geologically related conditions),\nchanges in the market prices of gold, silver, and copper, and a sustained\nlower price environment, the uncertainties inherent in Coeur’s production,\nexploratory, and developmental activities, including risks relating to\npermitting and regulatory delays, ground conditions, grade and recovery\nvariability, any future labor disputes or work stoppages, the uncertainties\ninherent in the estimation of mineral reserves and mineral resources, the\npotential effects of pandemics or epidemics, including impacts to the\navailability of our workforce, continued access to financing sources,\ngovernment orders that may require temporary suspension of operations at one\nor more of our sites and effects on our suppliers or the refiners and smelters\nto whom the Company markets its production, changes that could result from\nCoeur’s future acquisition of new mining properties or businesses, the loss\nof any third-party smelter to which Coeur markets its production, the effects\nof environmental and other governmental regulations, the risks inherent in the\nownership or operation of or investment in mining properties or businesses in\nforeign countries, Coeur’s ability to raise additional financing necessary\nto conduct its business, make payments, or refinance its debt, as well as\nother uncertainties and risk factors set out in filings made from time to time\nwith the United States Securities and Exchange Commission and the Canadian\nsecurities regulators, including, without limitation, Coeur’s most recent\nreports on Form 10-K and Form 10-Q. Actual results, developments, and\ntimetables could vary significantly from the estimates presented. Readers are\ncautioned not to put undue reliance on forward-looking statements. Coeur\ndisclaims any intent or obligation to update publicly such forward-looking\nstatements, whether as a result of new information, future events, or\notherwise. Additionally, Coeur undertakes no obligation to comment on\nanalyses, expectations, or statements made by third parties in respect of\nCoeur, its financial or operating results, or its securities.\n\nThe scientific and technical information concerning our mineral projects in\nthis news release has been reviewed and approved by a “qualified person”\nunder Item 1300 of Regulation S-K under the Securities Exchange Act of 1934,\nas amended (“SK 1300”), namely our Senior Vice President, Technical\nServices, Christopher Pascoe. For a description of the key assumptions,\nparameters, and methods used to estimate mineral reserves and mineral\nresources for Coeur’s material properties included in this news release, as\nwell as data verification procedures and a general discussion of the extent to\nwhich the estimates may be affected by any known environmental, permitting,\nlegal, title, taxation, sociopolitical, marketing, or other relevant factors,\nplease review the Technical Report Summaries for each of the Company’s\nmaterial properties, which are available at www.sec.gov\n(https://cts.businesswire.com/ct/CT?id=smartlink&url=https%3A%2F%2Fwww.sec.gov&esheet=54608656&newsitemid=20260922510800&lan=en-US&anchor=www.sec.gov&index=2&md5=f57a5e9b5f9c247051e436acec7d7302)\n.\n\nNotes\n\nThe ranges of potential tonnage and grade (or quality) of the exploration\nresults described in this news release are conceptual in nature. There has\nbeen insufficient exploration work to estimate a mineral resource. It is\nuncertain if further exploration will result in the estimation of a mineral\nresource. The exploration results described in this news release therefore do\nnot represent, and should not be construed to be, an estimate of a mineral\nresource or mineral reserve. For additional information regarding 2025 mineral\nreserves and mineral resources, see\nhttps://www.coeur.com/operations/operations/reserves-resources/\n(https://cts.businesswire.com/ct/CT?id=smartlink&url=https%3A%2F%2Fwww.coeur.com%2Foperations%2Foperations%2Freserves-resources%2F&esheet=54608656&newsitemid=20260922510800&lan=en-US&anchor=https%3A%2F%2Fwww.coeur.com%2Foperations%2Foperations%2Freserves-resources%2F&index=3&md5=3540734d97a7fc6659b5f471733c9ed6)\n.\n\n\n 1. Figure reflects the midpoint of guidance as published by Coeur on August 5,\n2026.\n\n 2. Full-year planned total(s) include exploration spending and core drilling\namounts in early 2026 prior to Coeur’s acquisition of New Gold Inc. on March\n20, 2026. The amounts included from pre-acquisition are approximately $4\nmillion of exploration spending and 19 kilometers of drilling at New Afton and\n$3 million of exploration spending and 16 kilometers of drilling at Rainy\nRiver.\n\n 3. All drill intervals are estimated true widths. Rounding of grades, to\nsignificant figures, may result in apparent differences. For a complete table\nof all drill results included in this release, please refer to the following\nlink: \nhttps://www.coeur.com/New-Afton-and-Rainy-River-Exploration-Appendix\n(https://cts.businesswire.com/ct/CT?id=smartlink&url=https%3A%2F%2Fwww.coeur.com%2FNew-Afton-and-Rainy-River-Exploration-Appendix%2F&esheet=54608656&newsitemid=20260922510800&lan=en-US&anchor=https%3A%2F%2Fwww.coeur.com%2FNew-Afton-and-Rainy-River-Exploration-Appendix&index=4&md5=1ce58a84171ca2486acbdff301c537f9)\n\n.\n\n 4. As defined by the 0.18 g/t gold equivalent (“AuEq”)( )envelope.\n\n 5. Gold equivalent calculation assumes a gold-to-copper conversion ratio of 1 oz\nAu to 600 lb Cu.\n Conversion Table                      \n 1 short ton =   0.907185 metric tons  \n 1 troy ounce =  31.10348 grams        \n\n\n \n\n\n\nView source version on businesswire.com:\nhttps://www.businesswire.com/news/home/20260922510800/en/\n(https://www.businesswire.com/news/home/20260922510800/en/)\n\nFor Additional Information \n\nCoeur Mining, Inc.\n\n200 S. Wacker Drive, Suite 2100\n\nChicago, Illinois 60606\n\nAttention: Jeff Wilhoit, Vice President, Investor Relations\n\nPhone: (312) 489-5800\n\nwww.coeur.com\n(https://cts.businesswire.com/ct/CT?id=smartlink&url=http%3A%2F%2Fwww.coeur.com&esheet=54608656&newsitemid=20260922510800&lan=en-US&anchor=www.coeur.com&index=5&md5=1a0ee52bc92d37e52e377468bac3634b)\n\n\nCopyright Business Wire 2026"},"type":"article","timestamp":"2026-09-22T20:30:00.191631147Z","server_sent_at_ms":1790109000191},"received_at":"2026-09-22T20:30:00.334Z","source_url":"https://www.businesswire.com/news/home/20260922510800/en/"},"analysis":{"id":"139055","press_release_id":"150246","analysis_json":{"industry":{"label":"Metals & Mining","sector":"Materials"},"redFlags":["Exploration results are conceptual in nature and do not constitute mineral resource or reserve estimates","Record exploration spending more than double 2025 levels raises operating cost basis"],"eventType":"operations_update","narrative":"Coeur Mining provided an exploration update at its recently acquired New Afton and Rainy River mines in Canada, with drilling extending the K-Zone deposit more than 300 meters beyond its original ~850-meter footprint.\n\nCoeur expects to invest a record $158 million in exploration in 2026 — more than double 2025 levels — including $24 million at New Afton and $18 million at Rainy River, reflecting confidence in mine-life extension at both operations.\n\nAt Rainy River, underground zones were extended down-plunge (ODM Main Zone by 150+ meters, Zone 17 by 200+ meters) and infill drilling is expected to support inferred-to-measured-and-indicated resource upgrades at year-end.\n\nResults remain exploration-stage and conceptual, but reinforce both underground and open-pit growth potential supporting future production flexibility.","sentiment":"bullish","agentHooks":{"shouldPost":true,"suggestedAngle":"Rapid resource growth at K-Zone and Rainy River underpins mine-life extension thesis on newly acquired Canadian assets."},"keyFigures":{"customDimensions":{"kzone_maiden_m_and_i_resource":"48 million tonnes","kzone_maiden_inferred_resource":"6 million tonnes","kzone_mineralization_extension":"more than 300 meters beyond ~850 meter footprint","record_exploration_budget_2026":"$158 million","new_afton_2025_p_and_p_reserves":"36 million tonnes with 780,000 oz gold at 0.67 g/t and 591 million lb copper at 0.74%","new_afton_2026_exploration_budget":"$24 million","rainy_river_2026_exploration_budget":"$18 million","rainy_river_core_drilling_planned_2026":"~64 kilometers","rainy_river_core_drilling_completed_aug_30_2026":"43 kilometers across 51 holes"}},"quotedText":"These results reinforce our confidence in extending mine life and creating long-term value at both operations.","namedEntities":{"people":[{"name":"Aoife McGrath","role":"Executive Vice President, Exploration"},{"name":"Christopher Pascoe","role":"Senior Vice President, Technical Services (qualified person)"},{"name":"Jeff Wilhoit","role":"Vice President, Investor Relations"}],"products":["New Afton","Rainy River","K-Zone","Silvertip"],"companies":[{"name":"Coeur Mining, Inc.","ticker":"CDE"},{"name":"New Gold Inc.","relationship":"acquisition target (New Afton and Rainy River acquired March 20, 2026)"}],"dollarAmounts":[{"amount":"$158 million","context":"record 2026 exploration investment (midpoint of guidance)"},{"amount":"$24 million","context":"2026 exploration budget at New Afton"},{"amount":"$18 million","context":"2026 exploration budget at Rainy River"}]},"materialImpact":{"score":3,"reasoning":"Positive exploration results at New Afton's K-Zone and Rainy River support mine-life extension potential, backed by a record $158M 2026 exploration budget. However, results are exploration-stage with no resource/reserve conversion yet, so impact is meaningful but not immediately financial."},"tickerRelevance":{"others":[],"primary":"CDE"},"globalImportance":30,"audienceRelevance":35,"eventTypeSecondary":[],"importanceComponents":{"tickerTier":"mid-cap precious metals producer","eventGravity":"positive exploration update, no immediate financial impact","retailFavoriteBoost":"moderate — gold miners attract retail interest"}},"event_type":"operations_update","event_type_secondary":null,"sentiment":"bullish","material_impact_score":3,"narrative":"Coeur Mining provided an exploration update at its recently acquired New Afton and Rainy River mines in Canada, with drilling extending the K-Zone deposit more than 300 meters beyond its original ~850-meter footprint.\n\nCoeur expects to invest a record $158 million in exploration in 2026 — more than double 2025 levels — including $24 million at New Afton and $18 million at Rainy River, reflecting confidence in mine-life extension at both operations.\n\nAt Rainy River, underground zones were extended down-plunge (ODM Main Zone by 150+ meters, Zone 17 by 200+ meters) and infill drilling is expected to support inferred-to-measured-and-indicated resource upgrades at year-end.\n\nResults remain exploration-stage and conceptual, but reinforce both underground and open-pit growth potential supporting future production flexibility.","key_figures":{"customDimensions":{"kzone_maiden_m_and_i_resource":"48 million tonnes","kzone_maiden_inferred_resource":"6 million tonnes","kzone_mineralization_extension":"more than 300 meters beyond ~850 meter footprint","record_exploration_budget_2026":"$158 million","new_afton_2025_p_and_p_reserves":"36 million tonnes with 780,000 oz gold at 0.67 g/t and 591 million lb copper at 0.74%","new_afton_2026_exploration_budget":"$24 million","rainy_river_2026_exploration_budget":"$18 million","rainy_river_core_drilling_planned_2026":"~64 kilometers","rainy_river_core_drilling_completed_aug_30_2026":"43 kilometers across 51 holes"}},"named_entities":{"people":[{"name":"Aoife McGrath","role":"Executive Vice President, Exploration"},{"name":"Christopher Pascoe","role":"Senior Vice President, Technical Services (qualified person)"},{"name":"Jeff Wilhoit","role":"Vice President, Investor Relations"}],"products":["New Afton","Rainy River","K-Zone","Silvertip"],"companies":[{"name":"Coeur Mining, Inc.","ticker":"CDE"},{"name":"New Gold Inc.","relationship":"acquisition target (New Afton and Rainy River acquired March 20, 2026)"}],"dollarAmounts":[{"amount":"$158 million","context":"record 2026 exploration investment (midpoint of guidance)"},{"amount":"$24 million","context":"2026 exploration budget at New Afton"},{"amount":"$18 million","context":"2026 exploration budget at Rainy River"}]},"model_name":"glm-5.3-flashx","prompt_hash":"sha256:727b4b9429a443af","schema_hash":"sha256:05005c02d9cffac9","created_at":"2026-09-22T20:30:07.029Z","global_importance":30,"audience_relevance":35,"importance_components":{"tickerTier":"mid-cap precious metals producer","eventGravity":"positive exploration update, no immediate financial impact","retailFavoriteBoost":"moderate — gold miners attract retail interest"}},"durationMs":6681,"modelName":"glm-5.3-flashx"}}