X0607 3 2026-06-03 0 0002091017 Sunshine Silver Mining & Refining Co SSMR 0002132385 Groh Douglas false 2209 BIG CREEK RD KELLOGG ID 83837 true Common Stock 125000 D Stock Option (Right to Buy) 4 2035-07-15 Common Stock 250000 D Warrants 5 2027-07-21 Common Stock 12500 D Warrants 5 2027-09-30 Common Stock 50000 D These stock options were granted on July 15, 2025 and vest in three equal annual installments on the first three anniversaries of the grant date, 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