3. The section of the Proxy Statement entitled “OPINIONS OF NEWMONT’S FINANCIAL ADVISORS TO THE NEWMONT BOARD OF DIRECTORS—Opinion of Goldman Sachs& Co. LLC to the Newmont Board of Directors—Analysis of Implied Premia and Multiples” is hereby supplemented as follows:

The fourth and fifth bullets on page100 of the Proxy Statement are amended and restated to read as follows:

Goldcorp Research Analyst Views

Newmont Research Analyst Views

4. The section of the Proxy Statement entitled “The Arrangement—Board of Directors Following the Arrangement” is hereby supplemented as follows:

The first paragraph of this section on page111 of the Proxy Statement is amended to insert the following as a new third sentence, following the sentence beginning “Noreen Doyle…”:

Currently, the parties expect that Mr.Goldberg will not continue to serve as a director of the Company following his retirement as CEO.

***

Board Appointments Expected in Connection with the Proposed Newmont Goldcorp Transaction

Unrelated to the Matter, as previously disclosed, certain changes to the directors of Newmont are expected in connection with proposed Newmont Goldcorp transaction, as agreed in the publicly announced arrangement agreement entered into by Newmont and Goldcorp on January14, 2019, which was subsequently amended on February19, 2019 (as amended, the “arrangement agreement”).

The directors of the combined company are currently expected to include Noreen Doyle, Gregory Boyce, Bruce Brook, J. Kofi Bucknor, Gary Goldberg, Veronica Hagen, Sheri Hickok, René Médori, Jane Nelson and Julio Quintana from the current Newmont board of directors and Clement Pelletier, Cristina Bitar, Beverley A. Briscoe, Matthew Coon Come and Charles R. Sartain from the current Goldcorp board of directors. As disclosed on the Current Report on Form8-K filed with the SEC on March14, 2019, Mr.Ian Telfer, the chair of the board of directors of Goldcorp informed Newmont that he will not be joining the Newmont Goldcorp board of directors and accordingly, Goldcorp has agreed to waive Section2.17(b)of the arrangement agreement.

The foregoing updates and supersedes Newmont’s previous disclosure in the Proxy Statement.

Cautionary Statement Regarding Forward-Looking Statements

This Current Report on Form8-K contains “forward-looking statements” within the meaning of Section27A of the Securities Act of 1933, as amended, and Section21E of the Securities Exchange Act of 1934, as amended, which are intended to be covered by the safe harbor created by such sections and other applicable laws and “forward-looking information” within the meaning of applicable Canadian securities laws. Where a forward-looking statement expresses or implies an expectation or belief as to future events or results, such expectation or belief is expressed in good faith and believed to have a reasonable basis. However, such statements are subject to risks, uncertainties and other factors, which could cause actual results to differ materially from future results expressed, projected or implied by the forward-looking statements. Forward-looking statements often address our expected future business and financial performance and financial condition, and often contain words such as “anticipate,” “intend,” “plan,” “will,” “would,” “estimate,” “expect,” “believe,” “target,” “indicative,” “preliminary,” or “potential.” Forward-looking statements in this Current Report on Form8-K may include, without limitation: (i)statements relating to the proposed Newmont Goldcorp transaction and the expected terms, timing and closing of the proposed Newmont Goldcorp transaction, including receipt of required approvals and satisfaction of other customary closing conditions and expected changes among and appointments to the executive leadership team; (ii)estimates of future production and sales, including expected annual production range; (iii)estimates of future costs applicable to sales and all-in sustaining costs; (iv)expectations regarding accretion; (v)estimates of future capital expenditures; (vi)estimates of future cost reductions, efficiencies and synergies, including, without limitation, G&A savings, supply chain efficiencies, full potential improvement, integration opportunities and other improvements and savings; (vii)expectations regarding future exploration and the development, growth and potential of Newmont’s and Goldcorp’s operations, project pipeline and investments, including, without limitation, project returns, expected average IRR, schedule, decision dates, mine life, commercial start, first production, capital average production, average costs and upside potential; (viii)expectations regarding future investments or divestitures; (ix)expectations of future dividends and returns to stockholders; (x)expectations of future free cash flow generation, liquidity, balance sheet strength and credit ratings; (xi)expectations of future equity and enterprise value; (xii)expectations of future plans and benefits; (xiii)expectations regarding future mineralization, including, without limitation, expectations regarding reserves and resources, grade and recoveries; and (xiv)estimates of future closure costs and liabilities. Estimates or expectations of future events or results are based upon certain assumptions, which may prove to be incorrect. Such assumptions, include, but are not limited to: (i)there being no significant change to current geotechnical, metallurgical, hydrological and other physical conditions; (ii)permitting, development, operations and expansion of Newmont’s and Goldcorp’s operations and projects being consistent with current expectations and mine plans, including, without limitation, receipt of export approvals; (iii)political developments in any jurisdiction in which Newmont and Goldcorp operate being consistent with its current expectations; (iv)certain exchange rate assumptions for the Australian dollar or the Canadian dollar to the U.S. dollar, as well as other exchange rates being approximately consistent with current levels; (v)certain price assumptions for gold, copper, silver, zinc, lead and oil; (vi)prices for key supplies being approximately

consistent with current levels; (vii)the accuracy of current mineral reserve, mineral resource and mineralized material estimates; and (viii)other planning assumptions. Risks relating to forward-looking statements in regard to the Newmont’s and Goldcorp’s business and future performance may include, but are not limited to, gold and other metals price volatility, currency fluctuations, operational risks, increased production costs and variances in ore grade or recovery rates from those assumed in mining plans, political risk, community relations, conflict resolution governmental regulation and judicial outcomes and other risks. In addition, material risks that could cause actual results to differ from forward-looking statements include: the inherent uncertainty associated with financial or other projections; the prompt and effective integration of Newmont’s and Goldcorp’s businesses and the ability to achieve the anticipated synergies and value-creation contemplated by the proposed Newmont Goldcorp transaction; the risk associated with Newmont’s and Goldcorp’s ability to obtain the approval of the proposed Newmont Goldcorp transaction by their stockholders required to consummate the proposed Newmont Goldcorp transaction and the timing of the closing of the proposed Newmont Goldcorp transaction, including the risk that the conditions to the transaction are not satisfied on a timely basis or at all and the failure of the transaction to close for any other reason; the risk that a consent or authorization that may be required for the proposed Newmont Goldcorp transaction is not obtained or is obtained subject to conditions that are not anticipated; the outcome of any legal proceedings that may be instituted against the parties and others related to the arrangement agreement; unanticipated difficulties or expenditures relating to the transaction, the response of business partners and retention as a result of the announcement and pendency of the transaction; potential volatility in the price of Newmont Common Stock due to the proposed Newmont Goldcorp transaction; the anticipated size of the markets and continued demand for Newmont’s and Goldcorp’s resources and the impact of competitive responses to the announcement of the transaction; and the diversion of management time on transaction-related issues. For a more detailed discussion of such risks and other factors, see Newmont’s 2018 Annual Report on Form10-K, filed with the SEC as well as the Company’s other SEC filings, available on the SEC website or www.newmont.com, Goldcorp’s most recent annual information form as well as Goldcorp’s other filings made with Canadian securities regulatory authorities and available on SEDAR, on the SEC website or www.goldcorp.com. Newmont is not affirming or adopting any statements or reports attributed to Goldcorp (including prior mineral reserve and resource declaration) in this Current Report on Form8-K or made by Goldcorp outside of this Current Report on Form8-K. Goldcorp is not affirming or adopting any statements or reports attributed to Newmont (including prior mineral reserve and resource declaration) in this Current Report on Form8-K or made by Newmont outside of this Current Report on Form8-K. Newmont and Goldcorp do not undertake any obligation to release publicly revisions to any “forward-looking statement,” including, without limitation, outlook, to reflect events or circumstances after the date of this Current Report on Form8-K, or to reflect the occurrence of unanticipated events, except as may be required under applicable securities laws. Investors should not assume that any lack of update to a previously issued “forward-looking statement” constitutes a reaffirmation of that statement. Continued reliance on “forward-looking statements” is at investors’ own risk.

Additional Information about the Proposed Newmont Goldcorp Transaction and Where to Find It

This Current Report on Form8-K is not intended to and does not constitute an offer to sell or the solicitation of an offer to subscribe for or buy or an invitation to purchase or subscribe for any securities or the solicitation of any vote or approval in any jurisdiction, nor shall there be any sale, issuance or transfer of securities in any jurisdiction in contravention of applicable law. This communication is being made in respect of the proposed Newmont Goldcorp transaction involving the Company and Goldcorp to the terms of the arrangement agreement by and among the Company and Goldcorp and may be deemed to be soliciting material relating to the proposed Newmont Goldcorp transaction. In connection with the proposed Newmont Goldcorp transaction, the Company filed a proxy statement relating to a special meeting of its stockholders with the SEC on March11, 2019 Additionally, the Company filed and will file other relevant materials in connection with the proposed Newmont Goldcorp transaction with the SEC. Security holders of the Company are urged to read the proxy statement regarding the proposed Newmont Goldcorp transaction and any other relevant materials carefully in their entirety when they become available before making any voting or investment decision with respect to the proposed Newmont Goldcorp transaction because they contained and will contain important information about the proposed Newmont Goldcorp transaction and the parties to the transaction. The definitive proxy statement was mailed to the Company’s stockholders on March14, 2019. Stockholders of the Company are able to obtain a copy of the proxy statement, the filings with the SEC that have been and will be incorporated by reference into the proxy statement as well as other filings containing information about the proposed Newmont Goldcorp transaction and the parties to the transaction made by the Company with the SEC free of charge at the SEC’s website at www.sec.gov, on the Company’s website at www.newmont.com/investor-relations/default.aspx or by contacting the

Company’s Investor Relations department at [email protected] or by calling 303-837-5484. Copies of the documents filed with the SEC by Goldcorp are available free of charge at the SEC’s website at www.sec.gov.

Participants in the Proposed Newmont Goldcorp Transaction Solicitation

The Company and its directors, its executive officers, members of its management, its employees and other persons, under SEC rules, may be deemed to be participants in the solicitation of proxies of the Company’s stockholders in connection with the proposed Newmont Goldcorp transaction. Investors and security holders may obtain more detailed information regarding the names, affiliations and interests of certain of the Company’s executive officers and directors in the solicitation by reading the Company’s 2018 Annual Report on Form10-K filed with the SEC on February21, 2019, its proxy statement relating to its 2018 Annual Meeting of Stockholders filed with the SEC on March9, 2018 and other relevant materials filed with the SEC when they become available. Additional information regarding the interests of such potential participants in the solicitation of proxies in connection with the proposed Newmont Goldcorp transaction are set forth in the proxy statement related to the proposed Newmont Goldcorp transaction filed with the SEC on March11, 2019, and mailed to stockholders on March14, 2019. Additional information concerning Goldcorp’ executive officers and directors is set forth in its 2018 Annual Report on Form40-F filed with the SEC on March28, 2019, its management information circular relating to its 2018 Annual Meeting of Stockholders filed with the SEC on March16, 2018 and other relevant materials filed with the SEC when they become available.

About Newmont Mining Corporation (NYSE:NEM)

Newmont Mining Corporation is a global mining company, which is focused on the production of and exploration for gold and copper. The Company is primarily a gold producer with operations and/or assets in the United States, Australia, Peru, Indonesia, Ghana and Suriname. Its segments are North America, South America, Asia Pacific and Africa. It has gold reserves of over 73.7 million ounces and an aggregate land position of over 20,000 square miles. It is also engaged in the production of copper, through Batu Hijau in Indonesia, Boddington in Australia and Phoenix in the United States. The North America segment consists of Carlin, Phoenix and Twin Creeks in the state of Nevada, and Cripple Creek &Victor in the state of Colorado, in the United States. The South America segment consists of Yanacocha in Peru. The Asia Pacific segment consists of Boddington, Tanami and Kalgoorlie in Australia and Batu Hijau in Indonesia. The Africa segment consists primarily of Ahafo and Akyem in Ghana.