Vantage Drilling International — Proxy Solicitation & Information Statement 2026

Jun 3, 2026

VANTAGE DRILLING INTERNATIONAL LTD.
7710 CHERRY PARK DRIVE, SUITE T #177
HOUSTON, TX 77095

SCAN TO
VIEW MATERIALS & VOTE

VOTE BY INTERNET - www.proxyvote.com or scan the QR Barcode above
Use the Internet to transmit your voting instructions and for electronic delivery of information. Vote by 11:59 P.M. ET on June 17, 2026. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form.

ELECTRONIC DELIVERY OF FUTURE PROXY MATERIALS
If you would like to reduce the costs incurred by our company in mailing proxy materials, you can consent to receiving all future proxy statements, proxy cards and annual reports electronically via e-mail or the Internet. To sign up for electronic delivery, please follow the instructions above to vote using the Internet and, when prompted, indicate that you agree to receive or access proxy materials electronically in future years.

VOTE BY PHONE - 1-800-690-6903
Use any touch-tone telephone to transmit your voting instructions. Vote by 11:59 P.M. ET on June 17, 2026. Have your proxy card in hand when you call and then follow the instructions.

VOTE BY MAIL
Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717.

TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS:

T01078-S39746

KEEP THIS PORTION FOR YOUR RECORDS
DETACH AND RETURN THIS PORTION ONLY

THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED.

VANTAGE DRILLING INTERNATIONAL LTD.

The Board of Directors recommends you vote FOR the following:

For Against Abstain

1. To approve that the bye-laws of the Company be amended in the manner following, namely by deleting existing bye-law 164 and replacing it in its entirety with new bye-law 164:
   "164. MERGER AND AMALGAMATION
   In respect of any merger or amalgamation of the Company with any other company or corporation, wherever incorporated, which the Companies Act requires to be approved by the Shareholders, the necessary quorum for such general meeting shall be two or more persons throughout the meeting that are collectively representing in person or by proxy one-third of the issued shares of the Company, and the requisite Shareholders' approval shall be the affirmative votes of a majority of the votes cast in accordance with these bye-laws",
   with such amendments to the bye-laws of the Company to be adopted and to take immediate effect upon approval of such amendment ("Proposal 1").

2. To approve the agreement and plan of merger (the "Agreement and Plan of Merger") by and among the Company, Eldorado Drilling AS, a Norwegian private limited company ("Parent"), and Eldorado Drilling Merger Sub Limited, an exempted company limited by shares incorporated under the laws of Bermuda ("Merger Sub"), and the related statutory merger agreement in accordance with Section 105 of the Companies Act 1981 of Bermuda, as amended (the "Statutory Merger Agreement", and together with the Agreement and Plan of Merger, the "Merger Agreements") by and between the Company and Merger Sub, pursuant to which Merger Sub shall merge with and into the Company, with the Company being the surviving company thereof (the "Merger") and that the Company be authorized to perform all obligations, acts and things in connection with the Merger and the Merger Agreements ("Proposal 2").

3. To approve any adjournment of the special general meeting, if necessary or appropriate, to permit, among other things, further solicitation of proxies to approve Proposal 1 and/or Proposal 2 ("Proposal 3").

NOTE: Such other business as may properly come before the meeting or any adjournment or postponement thereof.

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Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer.

Signature [PLEASE SIGN WITHIN BOX] Date
Signature (Joint Owners) Date

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Important Notice Regarding the Availability of Proxy Materials for the Special General Meeting:
The Notice and Proxy Statement is available at www.proxyvote.com

T01079-S39746

VANTAGE DRILLING INTERNATIONAL LTD.

Special General Meeting of the Company
June 18, 2026 11:00 A.M. Atlantic
This proxy is solicited by the Board of Directors

The shareholder(s) hereby appoint(s) Sarah French or the Chairman of the Meeting or Jennifer Panchaud of Conyers Dill & Pearman Limited, the Company's Bermuda counsel as proxy, with the power of substitution, and hereby authorize(s) each of them to represent and to vote, as designated on the reverse side of this ballot, all of the ordinary shares of VANTAGE DRILLING INTERNATIONAL LTD. that the shareholder(s) is/are entitled to vote at the Special General Meeting of the Company to be held at 11:00 A.M. Atlantic on June 18, 2026, at the law offices of Conyers Dill & Pearman Limited, Richmond House, Ground Floor, 12 Par-la-ville Road, Hamilton HM08, Bermuda, and any adjournment or postponement thereof.

This proxy, when properly executed, will be voted in the manner directed herein. The proxy holder shall also have discretion to vote the Shares for or against any amendments to proposals duly made at the Special General Meeting of the Company or any postponement or adjournment thereof. If no direction is given, the Shares will be voted in favour of the proposals as recommended by the Board of Directors (including amendments thereto approved by the Board of Directors) when duly presented at the Special General Meeting of the Company or any postponement or adjournment thereof. The proxy holders shall have discretion to vote the Shares on any other matters as may otherwise properly come before the Special General Meeting of the Company or any postponement or adjournment thereof.

Continued and to be signed on reverse side