SSMR ▲ +0.4% - Sunshine Silver Mining & Refining Company $SSMR - Sunshine Silver Mining & Refining Appoints Mike Patterson as Vice President of Investor Relations and Corporate Development Sunshine Silver Mining & Refining appointed Mike Patterson to the newly created role of Vice President of Investor Relations and Corporate Development, a move that signals the company's focus on strengthening investor communications and strategic growth initiatives. The stock rose 0.4% on the announcement. 01-SEP-2026 06:30 AM ET