Zinnwald Lithium Plc is a mineral exploration and development company operating in the United Kingdom and Germany. Its principal project is the Zinnwald Lithium project, which covers 256.5 hectares in southeast Germany. The company was formerly known as Erris Resources Plc and changed its name to Zinnwald Lithium Plc in October 2020. Founded in 2012 and based in London, the United Kingdom, it has operated as a subsidiary of AMG Lithium B.V. since July 27, 2026.