X0607 3 2026-06-03 0 0002091017 Sunshine Silver Mining & Refining Co SSMR 0001937799 van Niekerk Pieter A. false 2209 BIG CREEK RD KELLOGG ID 83837 true Chief Financial Officer Common Stock 75000 D Stock Option (Right to Buy) 4 2035-07-15 Common Stock 1330000 D Warrants 5 2027-09-30 Common Stock 37500 D These stock options were granted on July 15, 2025 and vest in three equal annual installments on each of March 17, 2026, 2027 and 2028, subject to the reporting person's continuous service. Each warrant is exercisable for one share of common stock until the later of two years from the date of purchase or six months after the completion of the Issuer's initial public offering. Exhibit 24 - Power of Attorney. /s/ Michelle Shepston, as attorney-in-fact 2026-06-03