INTRODUCTION
This Amendment No. 4 to Schedule 13E-3 (together with the exhibits hereto, this Amended Schedule 13E-3 or Amended Transaction Statement), which amends and supplements the Rule 13e-3 Transaction Statement on Schedule 13E-3 filed with the Securities and Exchange Commission (the SEC) on September 29, 2022 (as amended by Amendment No. 1 to Schedule
13E-3, filed with the SEC on October 12, 2022, Amendment No. 2 to Schedule 13E-3, filed with the SEC on November 3, 2022 and
Amendment No. 3 to Schedule 13E-3, filed with the SEC on November 21, 2022, together, the Initial Schedule 13E-3), is being
filed with the SEC pursuant to Section 13(e) of the Securities Exchange Act of 1934, as amended (together with the rules and regulations promulgated thereunder, the Exchange Act), jointly by the following persons
(each, a Filing Person, and collectively, the Filing Persons): (i) Turquoise Hill Resources Ltd. (formerly Ivanhoe Mines Ltd.), a corporation continued under the laws of Yukon, Canada and the issuer of the
common shares, no par value (the Shares) that is subject to the Rule 13e-3 transaction (Turquoise Hill or the Corporation); (ii) Rio Tinto plc, a public
limited company incorporated under the laws of England and Wales (the Parent); (iii) Rio Tinto International Holdings Limited, a company incorporated under the laws of England and Wales (RTIH or the
Purchaser); (iv) 7999674 Canada Inc., a company incorporated under the federal laws of Canada (7999674 Inc.); (v) 46117 Yukon Inc., a company incorporated under the laws of Yukon, Canada (46117
Inc.); and (vi) 535630 Yukon Inc., a company incorporated under the laws of Yukon, Canada (535630 Inc. and, together with the Parent, the Purchaser, 7999674 Inc. and 46117 Inc., the Rio Tinto Filers).
On September 5, 2022 the Corporation, the Purchaser and the Parent entered into an Arrangement Agreement (as amended, restated, supplemented
or otherwise modified from time to time in accordance with its terms, the Arrangement Agreement), which provides for, among other things, the acquisition by the Purchaser, a wholly owned subsidiary of the Parent, of all of the
issued and outstanding Shares of the Corporation that the Parent or its affiliates do not directly or indirectly own for C$43.00 in cash per Share (the Consideration) through a Plan of Arrangement (the Plan of
Arrangement) pursuant to Section 195 of the Business Corporations Act (Yukon) (YBCA), pursuant to which the Corporation would become an indirectly wholly owned subsidiary of the Parent (the
Arrangement). A copy of the Plan of Arrangement is included as Appendix B to the Management Proxy Circular, which is attached as Exhibit (a)(2)(i) hereto (the Circular). A special meeting of the
Corporations shareholders (the Meeting) was initially called for November 1, 2022 to consider and, if thought advisable, pass a special resolution approving the Arrangement in the form attached as Appendix A to
the Circular (the Arrangement Resolution). The Corporation previously determined to postpone the Meeting, and correspondingly the deadline for the Shareholders to validly exercise Dissent Rights in connection with the Arrangement
and the deadline for the submission of proxies by the Shareholders. The Circular has been provided to the Corporations shareholders pursuant to applicable Canadian law.
The Circular is supplemented by the supplement, dated November 24, 2022, to the Circular, which supplement is attached as Exhibit (a)(2)(vii) (the
Circular Supplement). Pursuant to an amended interim order issued by the Supreme Court of Yukon on November 24, 2022 (the Amended Interim Order), the Meeting will be held on December 9,
2022 at 12:00 p.m. (Montréal time). On November 24, 2022, the Corporation, the Purchaser and the Parent entered into an amendment to the Arrangement Agreement (the Arrangement Agreement Amendment), in order to
amend the Plan of Arrangement and give effect to the Irrevocable Commitments (as defined in the Circular Supplement). A copy of the Arrangement Agreement Amendment is attached hereto as Exhibit (d)(vii).
The cross-references in this Amended Transaction Statement are being supplied pursuant to General Instruction F to Schedule
13E-3 and show the location in the Circular Supplement of information required to be included in response to the items of Schedule 13E-3. Pursuant to General Instruction
F to Schedule 13E-3, the information contained in the Circular Supplement, including all appendices thereto, is incorporated herein by reference, in its entirety and the responses to each item in this Amended
Transaction Statement are qualified in their entirety by the information contained in the Circular Supplement and the appendices thereto. Capitalized terms used but not expressly defined in this Amended Schedule
13E-3 are given the respective meanings given to them in the Circular or the Initial Schedule 13E-3, as applicable.
All information set forth in this Amended Transaction Statement should be read together with the information contained or incorporated by reference in the
Initial Schedule 13E-3.
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