0001193125-25-316249 Sample Contracts

VOTING SUPPORT AGREEMENT
Voting Support Agreement • December 11th, 2025 • Contango ORE, Inc. • Gold and silver ores • British Columbia

WHEREAS the Shareholder is the beneficial owner of [•] Dolly Varden Shares (the “Subject Shares”) and [•] Dolly Varden Options, and [•] Dolly Varden RSUs (together with the Subject Shares, the “Subject Securities”) in the issued and outstanding share capital of Dolly Varden Silver Corporation (“Dolly Varden”), as more particularly set forth in Schedule A attached hereto;

CONTANGO ORE, INC. AND 1566004 B.C. LTD. AND DOLLY VARDEN SILVER CORPORATION ARRANGEMENT AGREEMENT Dated December 7, 2025
Arrangement Agreement • December 11th, 2025 • Contango ORE, Inc. • Gold and silver ores • British Columbia

DOLLY VARDEN SILVER CORPORATION, a corporation existing under the laws of the Province of British Columbia (“Dolly Varden”).