SSR MINING | PAGE 1 News Release October 13, 2026 SSR MINING ANNOUNCES 20-YEAR LIFE OF MINE PLAN FOR MARIGOLD BASED ON EXPANDED 4.6 MILLION OUNCE MINERAL RESERVE • NPV5% OF $3.3 BILLION AND $3.8 BILLION AT CONSENSUS AND SPOT PRICES, RESPECTIVELY • MARIGOLD AVERAGES ANNUAL PRODUCTION OF 231,000 OUNCES OF GOLD FROM 2027 TO 2031 • LIFE OF MINE GOLD PRODUCTION TOTALS 3.3 MILLION OUNCES AT AN AVERAGE ALL-IN SUSTAINING COST (“AISC”) OF $2,062 PER OUNCE SOLD (1, 2) • SSR MINING’S U.S. PORTFOLIO NOW ANCHORED BY TWO MULTI-DECADE ASSETS IN MARIGOLD AND CC&V HOSTING TOTAL COMBINED GOLD MINERAL RESERVES OF 7.3 MILLION OUNCES, WITH AN ADDITIONAL 6.5 MILLION OUNCES OF M&I RESOURCES AND 2.3 MILLION OUNCES INFERRED DENVER – SSR Mining Inc. (Nasdaq/TSX: SSRM) (“SSR Mining”, the “Company”, “we”, “us”, or “our”) announces the results of a Technical Report Summary (“TRS”) for the Marigold Gold Complex (“Marigold”) in Nevada, USA (the “2026 Marigold TRS”). Highlights of the 2026 Marigold TRS: (1,2) • After-tax NPV5% of $3.3 billion at consensus gold prices averaging $3,948 per ounce over the 20-year life of mine • Average annual gold production of 231,000 ounces over the five-year period from 2027 to 2031, 201,000 ounces through 2040, and 169,000 ounces over the 20-year life of mine o Over the period of active mining, annual after-tax operating cash flow and after-tax free cash flow averages $354 million and $273 million, respectively, based on consensus gold prices • Gold Mineral Reserves at Marigold total 4.6 million ounces, an increase of 43% from the 3.2 million ounces at year-end 2025, with a significant Mineral Resource base demonstrating additional potential for longer-term upside o Measured & Indicated Mineral Resources, exclusive of Mineral Reserves, total 1.7 million ounces of gold as compared to the 1.8 million ounces of M&I Resources as of year-end 2025 o Inferred Mineral Resources are an additional 0.3 million ounces of gold as compared to the 0.5 million ounces as of year-end 2025 • Inclusive of mined depletion, gold Mineral Reserves in the 2026 Marigold TRS increased significantly as compared to the 2024 TRS, while Indicated and Inferred Mineral Resources remained materially unchanged over the same time period o The gold prices used in the calculation of Marigold Mineral Reserves and Mineral Resources are $2,200/oz and $2,500/oz, respectively • 2026 Marigold TRS incorporates the maiden life of mine plan for the Buffalo Valley project (“Buffalo Valley”) with 0.7 million ounces of gold Mineral Reserves and first production expected in 2029 o Growth capital investment over the life of mine totals $542 million, including the development of Buffalo Valley and its stand-alone heap leach facility, as well as fleet additions to support a 33% increase in overall mining rates at Marigold to an average of 138 million tonnes per annum o Investment in fleet modernization and expansion will improve productivity and operational flexibility to support the multi-decade mine life at Marigold (1) The Company reports non-GAAP financial measures including after-tax free cash flow to manage and evaluate its operating performance at its mines. See “Non-GAAP Financial Measures” at the end of this press release for an explanation of these financial measures and a reconciliation of these financial measures to operating cash flow, which is the most comparable GAAP financial measure. (2) The calculations of average annual gold production use 2027 as Year 1, since 2026 represents a partial year of operation in the TRS. From 2027 onwards, life of mine gold production at Marigold is 3.2 million ounces at an AISC of $2,005 per ounce sold.

SSR MINING | PAGE 2 Rod Antal, Executive Chairman of SSR Mining, said, “Today’s updated life of mine plan reinforces Marigold’s position as a premier, multi-decade asset in the United States. Over the next three years, we plan to invest in Marigold to modernize the operation for future success through fleet and heap leach pad expansions that aim to improve its operational flexibility and reliability. Importantly, over the next five years we expect Marigold will average more than 230,000 ounces of gold production annually, aligned with the prior TRS expectations and supporting average annual gold production of approximately 360,000 ounces from our U.S. assets over that period. Longer-term, the mine is expected to average 200,000 ounces of gold production annually through 2040, delivering a more than 50% increase in life of mine production over the prior mine plan. Investing in organic growth is one of the key pillars of our capital allocation strategy, and this TRS provides a clear pathway for us to execute on that strategy and create value for shareholders. This new mine plan increases Mineral Reserves by 43% as compared to year-end 2025 while Indicated and Inferred Resources remain essentially unchanged, demonstrating our track record of exploration and resource development success while highlighting further potential for additional mine life extension in the future.” The TRS, with an effective date of May 1, 2026, has been prepared in accordance with S-K 1300 and will be available on October 13, 2026 on the Company’s website and on a Current Report on Form 8-K to be filed with the U.S. Securities and Exchange Commission (“SEC”).

SSR MINING | PAGE 3 Figure 1: 2026 Marigold TRS – Production Summary (in koz) Table 1: 2026 Marigold TRS – Key Metrics (3) Five-Year Profile Active Mining Total Mine Life Unit 2027 – 2031 2027 – 2040 2027 – 2050 Total Gold Production Au koz 1,153 2,816 3,208 Average Annual Gold Production Au koz 231 201 169 Total Operating Cash Flow (GAAP) $M $2,353 $4,955 $5,978 Total Capital Costs (GAAP) (4) $M $817 $1,133 $1,231 Total Free Cash Flow (non-GAAP) (5) $M $1,536 $3,822 $4,747 Average Annual Free Cash Flow $M $307 $273 $253 Cost of Sales (GAAP) $/oz sold $1,990 $1,959 $1,793 Cash Costs (non-GAAP) (5) $/oz sold $1,991 $1,960 $1,795 All-In Sustaining Costs (non-GAAP) (5) $/oz sold $2,279 $2,183 $2,005 (3) Five-Year Profile metrics are from 2027 to 2031, Active Mining metrics are from 2027 to 2040 and Total Mine Life metrics are summed over the period of 2027 to 2050. Average Total Mine Life metrics are calculated over the period 2027 to 2045, as residual heap leaching concludes in 2045. (4) Total capital costs include sustaining capital, development capital, and reclamation. (5) The Company reports non-GAAP financial measures including after-tax free cash flow and All-In Sustaining Cost (“AISC”) per ounce sold to manage and evaluate its operating performance at its mines. All cash flow figures are presented after tax. See “Non-GAAP Financial Measures” at the end of this press release for an explanation of these financial measures and a reconciliation of these financial measures to operating cash flow and cost of sales, which are the most comparable GAAP financial measures. Cost of sales excludes depreciation, depletion, and amortization. Table 2: 2026 Marigold TRS – After-Tax NPV Sensitivity LOM Average Gold Price $/oz $3,158 $3,553 Base Case (6) $4,342 $4,737 Sensitivity % -20% -10% — +10% +20% NPV5% $M $1,609 $2,471 $3,334 $4,196 $5,058 (6) Base Case gold price assumption averages $3,948/oz over the life of mine, including the long-term gold price of $3,710/oz starting in 2031. See “assumptions” at the end of this press release for a summary of gold prices used in the 2026 Marigold TRS.

SSR MINING | PAGE 4 Marigold Mineral Reserves and Mineral Resources (“MRMR”) (7) Marigold is located in southeastern Humboldt County, Nevada, United States on the Battle Mountain-Eureka trend, approximately 5 kilometers south-southwest of the town of Valmy, Nevada. The Marigold Complex includes the Marigold Mine and the Buffalo Valley and Trenton Canyon deposits. Buffalo Valley is located approximately 24 kilometers southwest of the main infrastructure at Marigold. Since commencing operations in 1989, Marigold has produced over 5 million ounces of gold. Table 3: 2026 Marigold TRS – MRMR as of May 1, 2026 (100% attributable) Tonnes (Mt) Grade (g/t) Gold (Moz) Total P+P Reserves 359 0.40 4.63 M&I Mineral Resources 131 0.40 1.66 Inferred Mineral Resources 29 0.31 0.29 Combining Marigold with the Company’s CC&V gold mine in Colorado established SSR Mining as the third largest gold producer in the USA. Both operations now feature multi-decade mine lives and host significant Mineral Resource bases to support potential for future growth and extension. Figure 2: SSR Mining – MRMR by U.S. Asset Marigold CC&V USA Consolidated (7) Please see “Supplemental Mineral Reserve and Mineral Resource Information” at the end of this press release for additional details. Mineral Resources are exclusive of Mineral Reserves. Numbers may not add due to rounding. Figure 3: SSR Mining – Combined U.S. Production Profile 0 50 100 150 200 250 300 350 400 450 500 2027E 2028E 2029E 2030E 2031E 2032E 2033E 2034E 2035E 2036E 2037E 2038E 2039E 2040E 2041E 2042E Gold Production (koz) Marigold Gold Production (2026 TRS) CC&V Gold Production (2025 TRS)

SSR MINING | PAGE 5 2026 Marigold TRS Overview Geological understanding of the Marigold Complex is supported by more than three decades of mining operations, extensive exploration programs, geologic mapping, geophysical surveys, metallurgical testing, production history, and ongoing resource definition drilling. Mining & Processing The 2026 Marigold life of mine plan features 15 years of active mining and 20 years of total production, inclusive of heap leach pad rinsing and drawdown. The Marigold Complex mine plan outlined in the 2026 Marigold TRS has five distinct areas of mining: the main Mackay pit (including the Red Dot and DG80 areas), the North Mackay pits, the Valmy pits, the New Millennium area, and Buffalo Valley. A separate mining fleet of 8 to 10 trucks and two hydraulic shovels was initially considered for Buffalo Valley, however, procuring additional trucks and loading units in 2027 allows for accelerated waste stripping at Marigold ahead of initial development at Buffalo Valley. Peak fleet size in the 2026 Marigold TRS is 45 haul trucks, six shovels and two loaders. This expanded fleet is then adequate to operate both Marigold and Buffalo Valley simultaneously over the life of mine and enables increased flexibility in mine planning going forward. On average, the operating period from 2026 to 2040 includes average mining rates of approximately 380,000 tonnes per day (138.3 million tonnes per annum) with a life of mine strip ratio of 5.3:1. Stacking rates are expected to average approximately 20 million tonnes per annum at Marigold over the life of mine, while the Buffalo Valley heap leach facility is designed to accommodate stacking rates of up to 14 million tonnes per annum. The life of mine gold recovery across Marigold and Buffalo Valley is 72% over an average of 90 to 120 day leach cycle, with an average stacked grade of 0.44 grams per tonne. Life of mine gold production totals 3.34 million ounces, including approximately 0.3 million ounces of current work-in-progress inventory recovered over the life of mine. The Buffalo Valley heap leach facility will be constructed and operated in a manner very similar to the main Marigold facility. Run of mine ore will be truck stacked in 7.5 meter to 12.5 meter lifts. Following heap leaching, pregnant solution will be pumped into three Carbon-in Column (CIC) trains for adsorption. Loaded carbon from the adsorption circuit will be transported to the Marigold elution facility for final recovery, with barren carbon then transported back to the Buffalo Valley facility. Buffalo Valley will require upgrades to the road connecting to main Marigold facilities, and will require the construction of approximately 14.5 kilometers of power line from the existing North Peak power line to service the project site. Table 4: 2026 Marigold TRS – Operating Metrics Summary Unit Life of Mine Total Material Mined Mt 1,881 Average Daily Mining Rate ktpd 380 Total Ore Mined Mt 298 Total Waste Mined Mt 1,583 Strip Ratio W:O 5.3:1 Total Ore Processed Mt 298 Average Daily Processing Rate ktpd 58 Ore Grade Stacked g/t 0.44 Contained Gold Stacked koz 4,255 Gold Recovery % 72%

SSR MINING | PAGE 6 Infrastructure The Marigold Complex is accessed via a five kilometer public road connected to the U.S. Interstate Highway 80. Marigold is grid connected, while water for operations is supplied by three existing groundwater production wells. Mine dewatering wells are used to supplement production wells when needed. Where possible, operations at Buffalo Valley will leverage existing infrastructure at Marigold, including the maintenance facilities and administrative offices. A tailings storage facility (TSF) is present at Marigold but has been decommissioned since operations transitioned solely to heap leaching. Operating Costs Forecasted operating cost estimates related to the development of the 2026 Marigold TRS are derived from annual budgets and historical actuals over the long life of the current operation. The life of mine operating cost estimate for the Marigold Complex is $16.78 per tonne of stacked ore. Life of mine operating costs in the 2026 Marigold TRS do not account for non-cash inventory movements and other minor non-cash items that impact the Company’s calculation of cash costs and AISC. Table 5: 2026 Marigold TRS – Mine Operating Cost Summary Operating Costs Life of Mine ($M) Stacked ($/Tonne) Mining & Maintenance $3,741 $12.57 ($1.99/t moved) Processing $804 $2.70 G&A $451 $1.51 Total Costs $4,996 $16.78 Labor and diesel are the two largest components of operating costs at Marigold. Diesel prices for the economic analysis were based on the latest available consensus forward-looking price forecasts and compared to those used in other published studies. Near-term diesel price assumptions in the 2026 Marigold TRS average approximately $4.00/gallon before normalizing to $3.00/gallon over the long-term. The effective NSR royalty on the Marigold property in the 2026 Marigold TRS is approximately 6.9%, while the effective NSR royalty for the Buffalo Valley deposit is fixed at 3.5% over the life of mine. Figure 4: 2026 Marigold TRS – Cost Breakdown

SSR MINING | PAGE 7 Capital Costs Total life of mine capital outlined in the 2026 Marigold TRS is $1,385 million, including $669 million in sustaining capital. Sustaining capital costs include: • Replacement of mining equipment as it reaches its economic life during the active mining period. The majority of the mining equipment replacement costs relate to replacing haul trucks and excavators, as well as drills and mine support equipment • Major equipment rebuilds and component replacement to sustain equipment availability over the life of mine • Administration costs and various site infrastructure improvements • Ongoing cost associated with process infrastructure • Permitting costs mainly associated with dewatering infrastructure (wells, pipelines, rapid infiltration basins) that are required to manage the water table in advance of planned mine development Table 6: 2026 Marigold TRS – Total Capital Breakdown (2026+) Capital Costs Life of Mine ($M) Development Capital $542 Sustaining Capital $669 Reclamation $175 Total Capital $1,385 The life of mine growth capital at Marigold totals $542 million, including all capital associated with major leach pad expansion at Marigold, development of Buffalo Valley, and the expansion of the Marigold mining fleet. These investments support the development and mining of Buffalo Valley, as well as enable the execution of the extended Marigold life of mine plan. Table 7: 2026 Marigold TRS – Growth Capital Breakdown (2026+) Description Life of Mine ($M) Amount (%) Mining Equipment – Expansion $265 49% Heap Leach Facilities – Expansion $57 11% Buffalo Valley Development $220 40% Growth Capital Costs as of May 1, 2026 $542 100% The costs associated with reclamation and closure activities at Marigold are estimated to be $175 million, with the majority of these costs incurred from 2038 to the end of the current life of mine plan. Additional Potential for Upside at Marigold The 2026 Marigold TRS outlines 1.7 million ounces of gold Indicated Mineral Resources, exclusive of Mineral Reserves, and an additional 0.3 million ounces of gold Inferred Mineral Resources across the Marigold Complex. These Mineral Resources represent potential opportunities for future conversion to Mineral Reserves. Mineral Resources in the 2026 Marigold TRS were calculated using a gold price assumption of $2,500/oz. SSR Mining continues to invest in resource development and exploration drilling across the Marigold Complex to evaluate future growth potential, particularly through the continued expansion of currently defined Mineral Reserve pits. In 2026, SSR Mining planned for more than 10 kilometers of drilling on brownfield targets across the property, including in the underexplored southern end of the property where new discoveries could support further heap leach expansions to further optimize ore and waste movements. Additionally, potential increases to the gold price assumptions used in the calculation of Mineral Reserves and Resources could add to current MRMR totals at Marigold in the future.

SSR MINING | PAGE 8 Figure 5: SSR Mining’s Proven M&A Track Record (8) Marigold Seabee CC&V (8) Acquisition Value includes initially announced acquisition price, subsequent property acquisitions and the present value of contingent payments; Current values are rounded; “Realized Cash” means revenue less cost of sales, exploration, evaluation, and reclamation expenditures, cash care and maintenance, capital expenditures and taxes; See “Non-GAAP Financial Measures” at the end of this press release for additional details. Analyst NAV based on broker consensus research as of October 5, 2026. Assumptions All figures are in U.S. dollars, unless otherwise noted. The gold price used in the calculation of Mineral Reserves was $2,200 per ounce and the gold price used in the calculation of Mineral Resources was $2,500 per ounce. The TRS is based on gold prices of: 2026 - $4,637/oz; 2027 - $4,794/oz; 2028 - $4,616/oz; 2029 - $4,355/oz; 2030 - $3,991/oz; and long-term - $3,710/oz. Diesel price assumptions used in the TRS were: $4.00/gal for 2027 and 2028, $3.50/gal in 2029 and $3.00/gal long-term. All references to tonnage in this press release are in metric tonnes unless otherwise noted. Key assumptions used in the preparation of the TRS are subject to risks and uncertainties described under “Cautionary Note Regarding Forward-Looking Information and Statements”. Marigold Technical Report Summary The Marigold TRS is expected to be included as an exhibit to our Current Report on Form 8-K that is filed with the SEC by October 13, 2026 and will be available for review on EDGAR at sec.gov at that time. This press release does not purport to be a complete summary of the Marigold TRS and is qualified in its entirety by reference to the Marigold TRS that we will file with the SEC. You should read this press release in conjunction with the Marigold TRS, including the qualifications and limitations described therein, as there may be information in the Marigold TRS that may be important. About SSR Mining SSR Mining Inc. is a free-cash-flow-focused gold and silver mining company and the third-largest gold producer in the United States. SSR Mining has a diversified portfolio of operating, development and exploration assets across the Americas, including four operating mines in the USA, Canada, and Argentina. In 2026, SSR Mining is expected to produce between 450,000 and 535,000 Gold Equivalent Ounces. The Company is headquartered in Denver, Colorado and is listed under the ticker symbol SSRM on the Nasdaq Stock Market and the Toronto Stock Exchange. For more information, please visit: www.ssrmining.com. E-Mail: invest@ssrmining.com Phone: +1 (888) 338-0046

SSR MINING | PAGE 9 Cautionary Note Regarding Forward-Looking Information and Statements: Except for statements of historical fact relating to us, certain statements contained in this news release constitute forward-looking statements, forward-looking information, future oriented financial information, or financial outlooks (collectively “forward-looking information”) within the meaning of applicable securities laws. Forward-looking information may be contained in this document and our other public filings. Forward-looking information relates to statements concerning our outlook and anticipated events or results and in some cases, can be identified by terminology such as “may”, “will”, “could”, “should”, “expect”, “plan”, “anticipate”, “believe”, “intend”, “estimate”, “projects”, “predict”, “potential”, “continue” or other similar expressions, as well as statements written in the future tense or that are not historical facts. Forward-looking information in this news release includes any statements concerning, among other things: all information related to the Company’s Marigold operations, including forecasts and outlook; preliminary cost reporting in this document; timing, production, operating, cost, and capital expenditure guidance; our operational and development targets and catalysts and the impact of any suspensions on operations; growth initiatives, the results of any gold reconciliations; the ability to discover additional oxide gold ore; the generation of free cash flow and returning cash to shareholders, including via share repurchases or dividends; matters relating to proposed exploration; communications with local stakeholders; maintaining community and government relations; negotiation and completion of transactions; commodity prices; Mineral Resources, Mineral Reserves, conversion of Mineral Resources, realization of Mineral Reserves, and the existence or realization of Mineral Resource estimates; the development approach; the timing and amount of future production; the timing of studies, announcements, and analysis; the timing of construction and development of proposed mines and process facilities; capital and operating expenditures; economic conditions; availability of sufficient financing; exploration plans; receipt of regulatory approvals; timing and impact surrounding suspension or interruption of operations as a result of regulatory requirements or actions by governmental authority; and any and all other timing, exploration, development, operational, financial, budgetary, economic, legal, social, environmental, regulatory, and political matters that may influence or be influenced by future events or conditions. The estimation of mineral resources is inherently uncertain and involves subjective judgments about many relevant factors. The accuracy of any such estimates is a function of the quantity and quality of available data, and of the assumptions made and judgments used in engineering and geological interpretation (including estimated future production from Marigold, the anticipated tonnages and grades that will be mined and the estimated level of recovery that will be realized), which may prove to be unreliable and depend, to a certain extent, upon the analysis of drilling results and statistical inferences that may ultimately prove to be inaccurate. Such forward-looking information is subject to various risks and uncertainties and based on a number of material factors and assumptions, which could cause actual results and experience to differ materially from anticipated results or expectations expressed in this news release, including, but not limited in any manner to, those disclosed from time to time in our reports filed with the SEC on EDGAR, including the “Risk Factors” section of our most recent Annual Report on Form 10-K and subsequent Quarterly Reports on Form 10-Q, as applicable, and the Canadian securities regulatory authorities on SEDAR+, and include: the assumptions made in respect of the Company’s Marigold operations; the inherent speculative nature of exploration results; the ability to explore; local and global political and economic conditions; governmental and regulatory requirements and actions by governmental authorities, including changes in government policy, government ownership requirements, changes in environmental, tax and other laws or regulations and the interpretation thereof; communications with local stakeholders; maintaining community and governmental relations; status of negotiations of joint ventures; weather conditions at our operations; commodity prices; the ultimate determination of and realization of Mineral Reserves; existence or realization of Mineral Resources; the development approach; availability and receipt of required approvals, titles, licenses and permits; sufficient working capital to develop and operate the mines and implement development plans; access to adequate services and supplies; foreign currency exchange rates; interest rates; access to capital markets and associated cost of funds; availability of a qualified work force; ability to negotiate, finalize, and execute relevant agreements; the Company’s ability to efficiently integrate acquired mines and businesses and to manage the costs related to any such integration, or to retain key technical, professional or management personnel; lack of social opposition to our mines or facilities; lack of legal challenges with respect to our properties; the timing and amount of future production; the ability to meet production, cost, and capital expenditure targets; timing and ability to produce studies and analyses; capital and operating expenditures; economic conditions; availability of sufficient financing; the ultimate ability to mine, process, and sell mineral products on economically favorable terms; and any and all other timing, exploration, development, operational, financial, budgetary, economic, legal, social, geopolitical, regulatory and political factors that may influence future events or conditions. While we consider these factors and assumptions to be reasonable based on information currently available to us, they may prove to be incorrect. The above list is not exhaustive of the factors that may affect any of the Company’s forward-looking information. You should not place undue reliance on forward-looking information. Forward-looking information are based on certain key expectations and assumptions made by us. Although we believe that the expectations and assumptions on which such forward-looking information are based are reasonable, undue reliance should not be placed on the forward-looking information because we can give no assurance that they will prove to be correct. Other than as required by law, we do not intend, and undertake no obligation to update any forward-looking information to reflect, among other things, new information or future events. The information contained on, or that may be accessed through, our website is not incorporated by reference into, and is not a part of, this document.

SSR MINING | PAGE 10 Qualified Persons The scientific and technical information concerning our mineral projects in this news release have been reviewed and verified by SLR International Corporation, a “qualified person” under subpart 1 of Regulation S-K 1300 (“S-K 1300”) and National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”). For a description of the key assumptions, parameters and methods used to estimate Mineral Reserves and Mineral Resources included in this news release, as well as data verification procedures and a general discussion of the extent to which the estimates may be affected by any known environmental, permitting, legal, title, taxation, sociopolitical, marketing or other relevant factors, please review the Technical Report Summaries for the properties discussed in this news release, which are available under the Company’s corporate profile on EDGAR at www.sec.gov. Supplemental Mineral Reserve and Mineral Resource Information Marigold’s Mineral Reserves and Mineral Resources have been classified in accordance with the definitions for Mineral Resources in S-K 1300. Mineral Resources are presented on a project basis and have an effective date of May 1, 2026. Mineral Reserves and Mineral Resources have been reported on a 100% basis as SSR Mining wholly owns the property. The TRS contains detailed descriptions of data verification, sampling and assay procedures, quality assurance and quality control measures, key assumptions, parameters, risks and other factors supporting the mineral resource and mineral reserve estimates and the economic analysis. Mineral Resources, which are not Mineral Reserves, do not have demonstrated economic viability. The estimate of Mineral Resources may be materially affected by environmental, permitting, legal, title, market or other relevant issues. The deposit has been classified as Indicated and Inferred based on drill spacing appropriate to the deposit and mineralization style. The quantity and grade of reported Inferred resources are uncertain in nature, and there has not been sufficient work to define these Inferred Mineral Resources as Indicated or Measured resources. There is no certainty that any part of a mineral resource will ever be converted into mineral reserves. The following tables provide a summary of Mineral Reserves and Mineral Resources for Marigold with an effective date of May 1, 2026 as included within the 2026 Marigold TRS: Proven Probable Proven + Probable Metallurgical Tonnage Au Grade Gold Tonnage Au Grade Gold Tonnage Au Grade Gold Recovery (Mt) (g/t) (Moz) (Mt) (g/t) (Moz) (Mt) (g/t) (Moz) (%) Marigold — — — 240.4 0.46 3.52 240.4 0.46 3.52 73.5% Buffalo Valley — — — 45.3 0.46 0.67 45.3 0.46 0.67 65.9% Stockpile — — — 12.0 0.17 0.06 12.0 0.17 0.06 56.3% Leach Pad Inventory — — — 61.0 0.19 0.37 61.0 0.19 0.37 65.2% Total — — — 358.7 0.40 4.63 358.7 0.40 4.63 71.5% (1) The Mineral Reserve estimate was prepared in accordance with S-K 1300 definitions. (2) The Marigold Mine Mineral Reserve estimate is based on a metal price assumption of $2,200/oz gold and is reported at a cut-off grade of 0.069 g/t payable Au (Au assay factored for recovery, royalty, and net proceeds). (3) The Buffalo Valley Mineral Reserve estimate assumes ROM heap leach processing and a gold price of $2,200/oz. Cut-off grades range from 0.069 to 1.767 g/t payable Au, and metallurgical recoveries range from 3.1% to 79.2%, both varying by lithology/metallurgical domain. (4) No mining dilution is applied to the grade of the Mineral Reserves. Dilution intrinsic to the Mineral Reserves estimate is considered sufficient to represent the mining selectivity considered. (5) Bulk densities (in t/m3) were assigned by lithologies: alluvium = 2.10, Havallah = 2.48, Valmy/Antler = 2.4076+(0.0001*DEPTH), and Valmy = 2.64. For Buffalo Valley, bulk densities (in t/m3) were assigned by lithology ranging from a low of 2.426 (Overburden) to a high of 2.737 (Basalt) with a weighted average of 2.63. (6) The Property is 100% owned by SSR through its subsidiary MMC. (7) All ounces reported represent troy ounces, and g/t represents grams per metric tonne. (8) The point of reference for Mineral Reserves is the entry to the carbon columns in the processing facility. (9) Totals may vary due to rounding. Measured Indicated Measured + Indicated Inferred Tonnage Au Grade Gold Tonnage Au Grade Gold Tonnage Au Grade Gold Tonnage Au Grade Gold (Mt) (g/t) (Moz) (Mt) (g/t) (Moz) (Mt) (g/t) (Moz) (Mt) (g/t) (Moz) Marigold — — — 125.0 0.39 1.57 125.0 0.39 1.57 18.1 0.30 0.18 Buffalo Valley — — — 5.6 0.53 0.09 5.6 0.53 0.09 11.2 0.31 0.11 Total — — — 130.6 0.40 1.66 130.6 0.40 1.66 29.3 0.31 0.29 (10)The Mineral Resource estimate was prepared in accordance with S-K 1300. (11)The effective date of Mineral Resources at Marigold is May 1, 2026, and the effective date of Mineral Resources at Buffalo Valley is May 1, 2026. (12)Marigold Mine is based on an optimized pit shell at a cut-off grade of 0.069 g/t payable gold (gold assay factored for recovery, royalty, and net proceeds). Buffalo Valley is based on a cut-off grade of 0.10 to 0.32 g/t contained gold, depending on material type. (13)Marigold metallurgical recoveries vary with gold grade. Buffalo Valley metallurgical recoveries vary with gold grade and lithology. (14)For Marigold, bulk densities (in t/m3) were assigned by lithologies: alluvium = 2.10, Havallah = 2.48, Valmy/Antler = 2.4076+(0.0001*DEPTH), and Valmy = 2.64, below 533m. For Buffalo Valley, bulk densities (in t/m3) were assigned by lithology, ranging from a low of 2.095 (Overburden) to a high of 2.725 (Basalt). (15)The Mineral Resources estimate is reported below the as-mined surface as of May 1, 2026, for Marigold, and below the as-mined surface as of May 1, 2026, for Buffalo Valley. (16)The point of reference for Mineral Resources is the entry to the carbon columns in the processing facility. (17)Mineral Resources are reported exclusive of Mineral Reserves.

SSR MINING | PAGE 11 (18)SSR Mining has 100% ownership of the Marigold Complex. (19)Gold grades are given in grams per metric tonne (g/t). (20)Totals may vary due to rounding. For Information regarding CC&V’s Mineral Reserves and Mineral Resources, refer to Item 2. Properties in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025 filed on February 17, 2026 and the Technical Report Summary included as an exhibit to our Annual Report on Form 10-K. The following tables provide a summary of Mineral Reserves and Mineral Resources for CC&V for the year ended December 31, 2025 as included within the Company’s Annual Report: Proven Probable Proven + Probable Metallurgical Tonnage Au Grade Gold Tonnage Au Grade Gold Tonnage Au Grade Gold Recovery (kt) (g/t) (koz) (kt) (g/t) (koz) (kt) (g/t) (koz) (%) CC&V (OP) 105,440 0.44 1,480 46,566 0.41 607 152,006 0.43 2,087 52% CC&V (Stockpile) — — — 68,205 0.26 564 68,205 0.26 564 47% Total 105,440 0.44 1,480 114,771 0.32 1,171 220,211 0.37 2,651 50% (1) The Mineral Reserve estimate was prepared in accordance with S-K 1300 definitions (2) CC&V Mineral Reserves are reported at a cut-off grade for crush leach is 0.10g/t Au extractable cyanide soluble (factored for recovery) and run of mine leach is 0.069 g/t Au extractable cyanide soluble (factored for recovery). (3) Metallurgical recoveries vary by lithology and oxidation state and ranges between 24.8-94.9% . (4) No mining dilution is applied to the grade of the Mineral Reserves. Dilution intrinsic to the Mineral Reserves estimate is considered sufficient to represent the mining selectivity considered. (5) The point of reference for Mineral Reserves is the entry to the carbon columns in the processing facility. (6) Leach Pad Inventory of 360 koz represents work-in-process gold and is 100% recoverable over the LOM. (7) Totals may vary due to rounding. Measured Indicated Measured + Indicated Inferred Tonnage Au Grade Gold Tonnage Au Grade Gold Tonnage Au Grade Gold Tonnage Au Grade Gold (kt) (g/t) (koz) (kt) (g/t) (koz) (kt) (g/t) (koz) (kt) (g/t) (koz) CC&V (OP) 157,034 0.49 2,456 149,020 0.43 2,078 306,054 0.46 4,534 149,352 0.41 1,963 CC&V (Stockpile) — — — 32,028 0.26 272 32,028 0.26 272 — — — Total 157,034 0.49 2,456 181,048 0.40 2,350 338,082 0.44 4,805 149,352 0.41 1,963 (8) The Mineral Resource estimate was prepared in accordance with S-K 1300. (9) CC&V Mineral Resources are reported based on $2,000/oz gold price. Mineral Resources estimate was prepared in accordance with S-K 1300. (10)Mineral Resource estimate is based on an optimized pit shell. CC&V Mineral Resources are reported at a gold cut-off grade for crush leach of 0.10 g/t gold extractable cyanide soluble (factored for metallurgical recovery) and run for mine leach of 0.069 g/t gold extractable cyanide soluble (factored for metallurgical recovery). (11)Metallurgical recoveries vary with gold grade, range between 24.8-94.9%. (12)Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability. (13)The point of reference for Mineral Resources is the entry to the carbon columns in the processing facility. (14)Totals may vary due to rounding.

SSR MINING | PAGE 12 Cautionary Note Regarding Non-GAAP Measures We have included certain non-GAAP performance measures throughout this document to assist in understanding our financial results. These performance measures are employed by us to measure our operating and economic performance internally and to assist in decision-making, as well as to provide key performance information to senior management. We believe that, in addition to measures prepared in accordance with GAAP, certain investors and other stakeholders will find this information useful to evaluate our operating and financial performance; however, these non-GAAP performance measures do not have any standardized meaning. These performance measures are intended to provide additional information and should not be considered in isolation or as a substitute for measures of performance prepared in accordance with GAAP. Our definitions of our non-GAAP financial measures may not be comparable to similarly titled measures reported by other companies. These non-GAAP measures should be read in conjunction with our condensed consolidated interim financial statements. Cash costs, AISC per ounce sold, and free cash flow are Non-GAAP Measures with no standardized definition under U.S. GAAP. Non-GAAP Measure - Cash Costs and AISC Cash Costs and All-In Sustaining Costs (“AISC”) per payable ounce of gold and respective unit cost measures are non-U.S. GAAP metrics developed by the World Gold Council to provide transparency into the costs associated with producing gold and provide a standard for comparison across the industry. The World Gold Council is a market development organization for the gold industry. The Company uses cash costs per ounce of precious metals sold and AISC per ounce of precious metals to monitor its operating performance internally. The most directly comparable measure prepared in accordance with GAAP is cost of sales. The Company believes this measure provides investors and analysts with useful information about its underlying cash costs of operations and the impact of by-product credits on its cost structure. The Company also believes these are relevant metrics used to understand its operating profitability. When deriving the cost of sales associated with an ounce of precious metal, the Company includes by-product credits, which allows management and other stakeholders to assess the net costs of gold and silver production. AISC includes total cost of sales incurred at the Company's mining operations, which forms the basis of cash costs. Additionally, the Company includes sustaining capital expenditures, sustaining mine-site exploration and evaluation costs, reclamation cost accretion and amortization, and general and administrative expenses. This measure seeks to reflect the ongoing cost of gold and silver production from current operations; therefore, growth capital is excluded. The Company determines sustaining capital to be capital expenditures that are necessary to maintain current production and execute the current mine plan. The Company determines growth capital to be those payments used to develop new operations or related to projects at existing operations where those projects will materially benefit the operation. The Company believes that AISC provides additional information to management and stakeholders that provides visibility to better define the total costs associated with production and better understanding of the economics of the Company's operations and performance compared to other producers. In deriving the number of ounces of precious metal sold, the Company considers the physical ounces available for sale after the treatment and refining process, commonly referred to as payable metal, as this is what is sold to third parties. The following tables provide a reconciliation of Cost of sales to cash costs and AISC used in the 2026 Marigold TRS: (in thousands, unless otherwise noted) 2027 – 2031 2027 – 2040 2027 – 2045 Cost of sales (GAAP) (1) $ 2,293,943 $ 5,513,569 $ 5,752,463 Treatment and refining charges $ 1,253 $ 3,351 $ 4,315 Cash costs (non-GAAP) $ 2,295,195 $ 5,516,920 $ 5,756,778 Sustaining capital $ 332,622 $ 569,533 $ 572,033 Reclamation cost accretion and amortization $ - $ 58,124 $ 101,536 Total AISC (non-GAAP) $ 2,627,817 $ 6,144,577 $ 6,430,348 Gold sold (oz) 1,152,882 2,815,000 3,207,423 Cost of sales per gold ounces sold $ 1,990 $ 1,959 $ 1,793 Cash cost per gold ounce sold $ 1,991 $ 1,960 $ 1,795 AISC per gold ounce sold $ 2,279 $ 2,183 $ 2,005 (1) Excludes depreciation, depletion, and amortization.

SSR MINING | PAGE 13 Non-GAAP Measure - Free Cash Flow and Mine Site Free Cash Flow The Company uses free cash flow and mine site free cash flow to supplement information in its condensed consolidated financial statements. The most directly comparable financial measure prepared in accordance with GAAP to free cash flow is cash provided by operating activities and the most directly comparable financial measure prepared in accordance with GAAP to mine site free cash flow is mine segment revenue. The Company believes that in addition to measures prepared in accordance with GAAP, certain investors and analysts use this information to evaluate the ability of the Company to generate cash flow after capital investments and build the Company's cash resources and, with respect to one of its mine segments, to evaluate the cash generated from a mine. The Company calculates free cash flow by deducting cash capital spending from cash generated by operating activities. The Company does not deduct payments made for business acquisitions. The Company calculates mine site free cash flow by deducting cost of sales, exploration, evaluation, and reclamation expenditures, cash care and maintenance, capital expenditures and taxes from revenue from a particular segment. The following table provides a reconciliation of cash provided by operating activities to free cash flow as shown in Table 1: (in millions of U.S. dollars) Consensus Gold Prices Five-Year Profile Active Mining Total Mine Life (2) Total Mine Life (2) 2027 – 2031 2027 – 2040 2027 – 2045 2027 – 2050 Operating cash flow after taxes (GAAP) $ 2,353 $ 4,955 $ 5,983 $ 5,978 Total capital costs $ (817) $ (1,133) $ (1,179) $ (1,231) Total free cash flow after taxes (non-GAAP) $ 1,536 $ 3,822 $ 4,804 $ 4,747 Number of years 5 14 19 24 Average operating cash flow after taxes (GAAP) $ 471 $ 354 $ 315 $ 249 Average total capital costs (including closure/reclamation costs) $ (163) $ (81) $ (62) $ (51) Average free cash flow after taxes (non-GAAP) $ 307 $ 273 $ 253 $ 198 (2) Total Mine Life metrics are summed over the period of 2027 to 2050. As residual heap leaching concludes in 2045, average operating cash flow, capital costs and free cash flow over the “Total Mine Life” period calculated between 2027 – 2045. The Company uses mine site free cash flow to supplement information in its condensed consolidated financial statements. The Company calculates mine site free cash flow as revenue less cost of sales, exploration, evaluation, and reclamation expenditures, cash care and maintenance, capital expenditures and taxes. We believe presenting asset level revenue minus large cash expenditures will be useful for investors because it represents a view of how much cash is actually generated and spent that is directly attributable to a specific site. The following table provides a calculation of mine Site Free Cash Flow for Marigold, Seabee and CC&V since acquisition through June 30, 2026: (in millions of U.S. dollars) Since Acquisition Marigold Seabee CC&V Revenue (GAAP) $ 4,455 $ 1,655 $ 765 Cost of sales $ (2,395) $ (660) $ (255) Exploration & reclamation $ (115) $ (110) $ (20) Care & maintenance $ — $ (25) $ — Capital expenditure $ (730) $ (320) $ (70) Mine site free cash flow before taxes (non-GAAP) $ 1,215 $ 540 $ 420 Taxes (3) $ (160) $ (140) $ (75) Mine site after tax free cash flow (non-GAAP) $ 1,055 $ 400 $ 345 (3) Represents federal and state taxes paid since acquisition

SSR MINING | PAGE 14 2026 Marigold TRS – Life of Mine Cash Flow Model (4,5) Operating Summary Total / Avg May 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 Total Ore Mined (kt) 297,731 11,891 20,903 20,812 22,849 14,178 20,240 27,442 24,325 24,047 23,541 25,589 20,301 16,367 18,182 7,064 — — — — — — — — — — Total Waste Mined (kt) 1,583,200 51,102 107,186 162,640 139,565 162,766 143,356 137,893 150,610 118,262 87,127 74,364 73,902 83,655 77,554 13,218 — — — — — — — — — — Total Material Mined (kt) 1,880,931 62,993 128,089 183,452 162,414 176,944 163,596 165,336 174,936 142,308 110,668 99,953 94,203 100,022 95,736 20,283 — — — — — — — — — — Stripping Ratio (W:O) 5.3 4.3 5.1 7.8 6.1 11.5 7.1 5.0 6.2 4.9 3.7 2.9 3.6 5.1 4.3 1.9 — — — — — — — — — — Total Ore Processed (kt) 297,731 11,891 20,903 20,812 22,849 14,178 20,240 27,442 24,325 24,047 23,541 25,589 20,301 16,367 18,182 7,064 — — — — — — — — — — Gold Grade, Stacked (g/t) 0.44 0.41 0.51 0.49 0.65 0.59 0.40 0.32 0.44 0.45 0.38 0.39 0.33 0.42 0.38 0.80 — — — — — — — — — — Average Recovery, Gold (%) 72% 75% 74% 72% 73% 71% 69% 68% 68% 72% 71% 73% 70% 76% 75% 76% — — — — — — — — — — Payable Gold, Total (koz) 3,335 128 170 281 243 280 179 205 221 231 207 198 150 157 158 135 148 100 68 46 31 — — — — — Financial Summary — — — — — — — — — — — — — — — — — — — — — — — — — — Gold Gross Revenue ($M) $13,166 $592 $817 $1,295 $1,059 $1,116 $665 $762 $821 $855 $768 $734 $556 $582 $587 $500 $550 $371 $251 $169 $114 — — — — — Operating Costs ($M) ($6,029) ($277) ($400) ($528) ($492) ($464) ($411) ($416) ($429) ($445) ($405) ($385) ($337) ($351) ($313) ($139) ($82) ($57) ($42) ($33) ($25) — — — — — Refining and Freight Cost ($M) ($5) ($0) ($0) ($0) ($0) ($0) ($0) ($0) ($0) ($0) ($0) ($0) ($0) ($0) ($0) ($0) ($0) ($0) ($0) ($0) ($0) — — — — — EBITDA ($M) $7,132 $315 $417 $767 $567 $651 $254 $346 $393 $410 $363 $348 $219 $230 $274 $361 $468 $314 $208 $136 $89 — — — — — Depreciation & Depletion ($M) ($3,171) ($105) ($186) ($307) ($283) ($286) ($187) ($235) ($242) ($225) ($180) ($157) ($124) ($124) ($122) ($105) ($168) ($56) ($38) ($25) ($17) — — — — — Earnings Before Taxes ($M) $3,961 $210 $231 $460 $284 $366 $67 $112 $150 $185 $183 $192 $95 $107 $152 $255 $300 $258 $171 $111 $72 — — — — — Federal & State Tax ($M) ($834) ($2) ($31) ($53) ($69) ($79) ($60) ($27) ($39) ($46) ($43) ($40) ($31) ($22) ($28) ($44) ($67) ($63) ($41) ($27) ($17) ($5) — — — — Net Income ($M) $3,127 $208 $200 $407 $215 $287 $7 $84 $112 $139 $140 $152 $64 $85 $124 $212 $233 $195 $129 $84 $55 ($5) — — — — AT Operating Cash Flow ($M) $6,298 $320 $384 $708 $498 $568 $194 $317 $352 $363 $318 $307 $187 $209 $244 $304 $395 $283 $168 $110 $73 ($5) $1 ($1) ($0) $0 Total Capital ($M) ($1,385) ($133) ($343) ($270) ($74) ($67) ($62) ($40) ($51) ($45) ($20) ($24) ($19) ($48) ($33) ($36) ($9) ($17) ($11) ($6) ($3) ($11) ($25) ($13) ($2) ($2) AT Free Cash Flow ($M) $4,913 $187 $41 $438 $424 $501 $132 $277 $301 $318 $298 $283 $169 $161 $211 $268 $386 $266 $157 $104 $70 ($16) ($24) ($13) ($2) ($2) Non-GAAP Reconciliation Cost of Sales ($M, GAAP) $6,029 $277 $400 $528 $492 $464 $411 $416 $429 $445 $405 $385 $337 $351 $313 $139 $82 $57 $42 $33 $25 — — — — — Treatment & Refining ($M) $5 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 — — — — — Cash Costs ($M, non-GAAP) $6,034 $277 $400 $528 $492 $464 $411 $416 $429 $445 $405 $386 $338 $351 $313 $139 $82 $57 $42 $33 $25 — — — — — Sustaining Capital ($M) $669 $97 $80 $91 $43 $57 $62 $36 $34 $44 $19 $21 $17 $33 $18 $17 $1 $1 $1 $1 $1 — — — — — Reclamation ($M) $175 — — — — — — $1 $1 $1 $1 $3 $2 $15 $15 $20 $8 $17 $10 $6 $3 $11 $25 $13 $2 $2 AISC ($M, non-GAAP) $6,877 $374 $480 $619 $535 $521 $473 $452 $464 $490 $425 $409 $356 $399 $346 $176 $91 $74 $53 $39 $28 $11 $25 $13 $2 $2 (4) All cash flow figures are presented after tax (“AT”). Free cash flow is calculated as operating cash flow less capital costs. The summary above does not include non-cash inventory adjustments and other minor non-cash items that impact the Company’s calculation of cash costs and AISC. (5) Figures represented in this table may not recalculate due to rounding.