SCHEDULE 13D/A 0000719413 XXXXXXXX LIVE 1 Common Shares 01/22/2026 false 0001542028 256827783 DOLLY VARDEN SILVER CORPORATION

SUITE 1130 - 1055 W HASTINGS STREET VANCOUVER A1 V6E 2E9

David C. Sienko 2087694100 6500 N. Mineral Dr., Suite 200 Coeur d'Alene ID 83815 0000719413 N HECLA MINING CO/DE/ a OO N DE 0.00 8358337.00 0.00 8358337.00 8358337.00 N 9.2 CO Y Hecla Canada Ltd. a OO N Z4 0.00 8358337.00 0.00 8358337.00 8358337.00 N 9.2 CO Y Hecla Quebec Inc. a OO N Z4 0.00 8358337.00 0.00 8358337.00 8358337.00 N 9.2 CO Common Shares DOLLY VARDEN SILVER CORPORATION SUITE 1130 - 1055 W HASTINGS STREET VANCOUVER A1 V6E 2E9 EXPLANATORY NOTE This Amendment No. 1 to Schedule 13D (this "Amendment No. 1") amends and supplements the Schedule 13D filed on May 30, 2025 (the "Schedule 13D") with the U.S. Securities and Exchange Commission (the "SEC"), relating to the common shares of Dolly Vardon Silver Corp. (the "Issuer"). Unless specifically amended hereby, the disclosures set forth in the Schedule 13D remain unchanged. Capitalized terms used in this Amendment No. 1 that are not otherwise defined herein have the meanings attributed to them in the Schedule 13D. Item 4 of the Schedule 13D is hereby amended and supplemented as follows: The purpose of this Amendment No. 1 is to reflect that, between January 20, 2026 and February 3, 2026, Hecla Canada Ltd. sold an aggregate of 3,600,000 Common Shares of the Issuer at weighted average prices per share set forth in Item 5(c) of this Amendment No. 1. Hecla Canada Ltd. effected such sale transactions in the open market on the TSX-Venture Exchange. Items 5(a), (b) and (c) of the Schedule 13D are hereby amended and restated as follows: Hecla Canada Ltd.: 7,006,374 (7.7%); Hecla Quebec Inc.: 1,351,963 (1.5%) Hecla Mining Company, which is a publicly traded entity listed on the New York Stock Exchange, is the sole shareholder of Hecla Canada Ltd. and Hecla Quebec Inc. Each of Hecla Mining Company, Hecla Canada Ltd. and Hecla Quebec Inc. have shared voting power and shared dispositive power over 8,358,337 Common Shares of the Issuer. Hecla Canada Ltd. effected the following sale transactions in Common Shares of the Issuer in the open market on the TSX-Venture Exchange on the dates indicated below. Such transactions are the only transactions in Common Shares of the Issuer by the Reporting Persons in the 60 days preceding the filing of this Amendment No. 1, or since the most recent filing of Schedule 13D by the Reporting Persons, whichever is less. Trade Date Number of Common Shares Sold Weighted Average Price Per Share 01/20/26 490,000 $7.4549 01/21/26 370,000 $7.1481 01/22/26 690,000 $7.7274 01/23/26 650,000 $7.6885 01/26/26 250,000 $7.9700 01/27/26 300,000 $7.0667 02/03/26 850,000 $6.4388 HECLA MINING CO/DE/ /s/ David C. Sienko 02/04/2026 Hecla Canada Ltd. /s/ Robert D. Brown 02/04/2026 Hecla Quebec Inc. /s/ Carlos Aguiar 02/04/2026