SSR MINING INC.

The Company has included certain non-GAAP financial measures to assist in understanding the Company's financial results. The non-GAAP financial measures are employed by the Company to measure its operating and economic performance and to assist in decision-making, as well as to provide key performance information to senior management. The Company believes that, in addition to conventional measures prepared in accordance with GAAP, certain investors and other stakeholders will find this information useful to evaluate the Company's 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. These non-GAAP measures should be read in conjunction with the Company's Condensed Consolidated Financial Statements.

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 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 it is a relevant metric 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 and lease related 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:

(3)Gold equivalent ounces are calculated multiplying the silver ounces by the ratio of the silver price to the gold price, using the average closing commodity prices for the period. The Company does not include by-products in the gold equivalent ounce calculations. Gold equivalent ounces sold may not re-calculate based on amounts presented in this table due to rounding.

(3)Gold equivalent ounces are calculated multiplying the silver ounces by the ratio of the silver price to the gold price, using the average closing commodity prices for the period. The Company does not include by-products in the gold equivalent ounce calculations. Gold equivalent ounces sold may not re-calculate based on amounts presented in this table due to rounding.

(3)Gold equivalent ounces are calculated multiplying the silver ounces by the ratio of the silver price to the gold price, using the average closing commodity prices for the period. The Company does not include by-products in the gold equivalent ounce calculations. Gold equivalent ounces sold may not re-calculate based on amounts presented in this table due to rounding.

(3)Gold equivalent ounces are calculated multiplying the silver ounces by the ratio of the silver price to the gold price, using the average closing commodity prices for the period. The Company does not include by-products in the gold equivalent ounce calculations. Gold equivalent ounces sold may not re-calculate based on amounts presented in this table due to rounding.

Non-GAAP Measure - Adjusted Attributable Net Income (Loss)

Adjusted attributable net income (loss) and adjusted attributable net income (loss) per share are used by management and investors to measure the Company’s underlying operating performance. The most directly comparable financial measures prepared in accordance with GAAP are Net income (loss) attributable to SSR Mining shareholders and Net income (loss) per share attributable to SSR Mining shareholders. Adjusted attributable net income (loss) is defined as net income (loss) adjusted to exclude the after-tax impact of specific items that are significant, but not reflective of the Company’s underlying operations, including impairment charges; and inflationary impacts on tax balances.

The following table provides a reconciliation of Net income (loss) attributable to SSR Mining shareholders to adjusted net income (loss) attributable to SSR Mining shareholders:

(1)For the three months ended September 30, 2025, the effects of the Çöpler Incident represent contingencies and expenses of $1.9 million (presented net of pre-tax attributable non-controlling interest of $0.5 million).

For the nine months ended September 30, 2025, the effects of the Çöpler Incident represent (1) reclamation costs of $7.5 million (presented net of pre-tax attributable non-controlling interest of $1.9 million) and remediation costs of $42.8 million (presented net of pre-tax attributable non-controlling interest of $10.7 million) and (2) contingencies and expenses of $5.0 million (presented net of pre-tax attributable non-controlling interest of $1.3 million).

For the nine months ended September 30, 2024, the effects of the Çöpler Incident represent (1) reclamation costs of $9.0 million (presented net of pre-tax attributable non-controlling interest of $2.2 million) and remediation costs of $209.3 million (presented net of pre-tax attributable non-controlling interest of $52.4 million); (2) impairment charges of $91.4 million (presented net of pre-tax attributable non-controlling interest of $22.8 million) related to plans to permanently close the heap leach pad; and (3) contingencies and expenses of $10.3 million (presented net of pre-tax attributable non-controlling interest of $2.6 million).

(2)For the nine months ended September 30, 2025, represents $35.5 million (presented net of pre-tax attributable non-controlling interest of $8.9 million) of business interruption insurance proceeds received associated with the Çöpler Incident.

(3)Adjusted net income (loss) per diluted share attributable to SSR Mining shareholders is calculated using diluted common shares, which are calculated in accordance with GAAP. For the three months ended September 30, 2024, $1.2 million of interest savings on 2019 Notes, net of tax, and dilutive potential shares of approximately 13.0 million were excluded from the computation of diluted loss per common share attributable to SSR Mining shareholders in the Condensed Consolidated Statement of Operations as they were antidilutive. For the nine months ended September 30, 2024, $3.7 million of interest savings on 2019 Notes, net of tax, and dilutive potential shares of approximately 13.3 million were excluded from the computation of diluted loss per common share attributable to SSR Mining shareholders in the Condensed Consolidated Statement of Operations as they were antidilutive. These interest savings and shares were included in the computation of adjusted net income (loss) per diluted share attributable to SSR Mining shareholders for the nine months ended September 30, 2024.

Non-GAAP Measure - Earnings Before Interest, Taxes, Depreciation and Amortization (“EBITDA”) and Adjusted EBITDA

EBITDA represents net income (loss) before interest, taxes, depreciation, and amortization. EBITDA is an indicator of the Company’s ability to generate liquidity by producing operating cash flow to fund working capital needs, service debt obligations, and fund capital expenditures.

Adjusted EBITDA represents net income (loss) before interest, taxes, depreciation, and amortization, adjusted to exclude the impact of specific items that are significant, but not reflective of the Company’s underlying operations, including impairment charges.

The most directly comparable financial measure prepared in accordance with GAAP to EBITDA and Adjusted EBITDA is Net income (loss) attributable to SSR Mining shareholders.

The following is a reconciliation of Net income (loss) attributable to SSR Mining shareholders to EBITDA and adjusted EBITDA:

(1)For the three months ended September 30, 2025, the effects of the Çöpler Incident represent contingencies and expenses of $2.4 million.

For the nine months ended September 30, 2025, the effects of the Çöpler Incident represent (1) reclamation costs of $9.4 million and remediation costs of $53.5 million and (2) contingencies and expenses of $6.3 million.

For the nine months ended September 30, 2024, the effects of the Çöpler Incident represent (1) reclamation costs of $11.2 million and remediation costs of $261.7 million; (2) impairment charges of $114.2 million related to plans to permanently close the heap leach pad; and (3) contingencies and expenses of $12.9 million.

(2)For the nine months ended September 30, 2025, represents business interruption insurance proceeds received associated with the Çöpler Incident.

Non-GAAP Measure - Free Cash Flow

The Company uses free cash flow to supplement information in its consolidated financial statements. The most directly comparable financial measures prepared in accordance with GAAP is Cash provided by (used in) operating activities. The Company believes that in addition to conventional measures prepared in accordance with US 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. 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 following table provides a reconciliation of Cash provided by (used in) operating activitiesto free cash flow: