Barrick Mining Corporation — Proxy Solicitation & Information Statement 2022

May 3, 2022

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hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form. D uring The Meeting - Go to www.virtualshareholdermeeting.com/FEN C2022 Y ou may attend the meeting via the Internet and vote during the meeting. Have the information that is printed in the box marked by the arrow available and follow the instructions. VO TE BY PHONE - 1-800-690-6903 U se any touch-tone VIEW MATERIALS & VOTE w SCAN TO FENNEC PHA RMA CEUTICALS IN C. 68 TW ALEXANDER D R P.O. BOX 13628 RESEARCH TRIANGLE PA RK, N C 27709 VOTE BY INTERNET Before The Meeting - G o to www.proxyvote.com or scan the QR Barcode above Use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 p.m. Eastern Time the day before the cut-off date or meeting date. Have your proxy card in telephone to transmit your voting instructions up until 11:59 p.m. Eastern Time the day before the cut-off date or meeting date. 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 BLO CKS BELOW IN BLUE OR BLA CK INK AS FOLLOWS: D86232- P75257 KEEP THIS PORTION FO R YOUR RECORD S DETA CH AND RETURN THIS PORTION ONLY THIS PROXY CA RD IS VALID ONLY WHEN SIGNED AND DATED. FENNEC PHA RMA CEUTICA LS IN C. THE BOARD O F DIRECTO RS RECOMMEND A VOTE “FO R” ITEMS 1, 2, AND 3. Vote on Directors For Withhold For A ll AllAllExcept To withhold authority to vote for any individual nominee(s), mark "For All Except" and write the number(s) of the nominee(s) on the line below. ! ! ! 1. ELECTION OF DIRECTORS Nominees: 01) 02) 03) Dr. Khalid Islam Mr. Adrian Haigh Mr. Chris A. Ra llis 04) 05) 06) Dr. Marco Brughera Dr. Jodi Cook Mr. Rostislav Raykov For Against Abstain Vote on Proposals 2. A PPOINTMENT O F AUDITORS Appointment of Haskell & White LLP as the auditors of the Corporation for the ensuing year and authorizing the directors of the Corporation to fix their remuneration. EXECUTIVE COMPENSATION To vote, on an advisory (non-binding) basis, on the compensation of the Corporation’s named executive officers. ! ! ! ! ! ! 3. The shares represented by this proxy when properly executed will be voted in the manner directed herein by the undersigned Shareholder(s). If no direction is made, this proxy will be voted FOR items 1, 2, and 3. If any other matters properly come before the meeting, this proxy confers discretionary authority in respect of such matters. 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 author ized officer. Signature [PLEA SE SIGN WITHIN BOX] Date Signature (Joint Owners) Date

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Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice and Proxy State ment and Annual Report are available at www.proxyvote.com. D 86233-P75257 FENNEC PHARMACEUTI CALS INC. ANNUAL MEETING O F SHA REHOLDERS THIS PROXY IS SOLI CITED BY THE BOA RD OF DIRECTORS The shareholder(s) hereby appoint(s) Robert Andrade and Rostislav Raykov, or either of the m, as proxies, each with the power to appoint his substitute, and hereby authorize(s) them to represent and to vote, as designated on the reverse side of this ballot, all of the Common Shares of Fennec Pharmaceuticals Inc. that the shareholder(s) is/are entitled to vote at the Annua l Meeting of Shareholders to be held at 11:00 a.m. (Eastern Time) on June 14, 2022, online by visiting

www.virtualshareholdermeeting.com/FEN C2022, and any adjournment or postpone ment thereof. THIS PROXY, WHEN PRO PERLY EXECUTED, WILL BE VOTED A S DIRECTED BY THE SHAREHOLD ER( S). IF NO SUCH DI RECTION S A RE MADE, THIS PROXY WILL BE VOTED FO R THE ELECTION OF THE NOMINEES LISTED ON THE REVERSE SIDE FO R THE BOARD OF DI RECTO RS AND FO R EA CH PRO POSAL. PLEA SE MARK, SIGN, DATE AND RETURN THIS PROXY CA RD PROMPTLY U SING THE EN CLO SED REPLY ENVELOPE CONTINUED AND TO BE SIGNED ON REVERSE SIDE