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Exhibit 99.4

Independent Auditor’s Report Grant Thornton LLPSuite 1600, Grant Thornton Place333 Seymour StreetVancouver, BCV6B 0A4T +1 604 687 2711F +1 604 685 6569www.GrantThornton.ca
 To the shareholders ofRio Alto Mining Limited We have audited the accompanying financial statements of Rio Alto Mining Limited, which comprise the consolidated statements of financial position as at December 31, 2013 and December 31, 2012, and the consolidated statements of net income and comprehensive income, consolidated statements of changes in equity and consolidated statements of cash flows for the years ended December 31, 2013 and December 31, 2012, and a summary of significant accounting policies and other explanatory information. Management’s responsibility for the financial statementsManagement is responsible for the preparation and fair presentation of these financial statements in accordance with International Financial Reporting Standards as issued by the International Accounting Standards Board, and for such internal control as management determines is necessary to enable the preparation of financial statements that are free from material misstatement, whether due to fraud or error. Auditor’s responsibilityOur responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits in accordance with Canadian generally accepted auditing standards and the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we comply with ethical requirements and plan and perform the audit to obtain reasonable assurance about whether the financial statements are free from material misstatement. An audit involves performing procedures to obtain audit evidence about the amounts and disclosures in the financial statements. The procedures selected depend on the auditor’s judgment, including the assessment of the risks of material misstatement of the financial statements, whether due to fraud or error. An audit also includes evaluating the appropriateness of accounting policies used and the reasonableness of accounting estimates made by management, as well as evaluating the overall presentation of the financial statements. We were not engaged to provide an audit of the company’s internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the company’s internal control over financial reporting. Accordingly, we express no such opinion. Audit • Tax • AdvisoryGrant Thornton LLP. A Canadian Member of Grant Thornton International Ltd


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We believe that the audit evidence we have obtained in our audits is sufficient and appropriate to provide a basis for our audit opinion. OpinionIn our opinion, the financial statements present fairly, in all material respects, the consolidated financial position as at December 31, 2013 and December 31, 2012, and its financial performance and its cash flows for the years ended December 31, 2013 and December 31, 2012 in accordance with International Financial Reporting Standards as issued by the International Accounting Standards Board. Vancouver, CanadaMarch 27, 2014

   Chartered Accountants
 Audit • Tax • AdvisoryGrant Thornton LLP. A Canadian Member of Grant Thornton International Ltd


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