Solid Power (NASDAQ: SLDP) shares rose 14.63% in premarket trading on October 31, 2025, after announcing a strategic collaboration with Samsung SDI and BMW Group. The partnership focuses on developing a demonstration vehicle utilizing Solid Power's all-solid-state battery technology, specifically its sulfide-based solid electrolyte material. Over the past year, Solid Power's stock has surged 345%, with the current premarket price at $6.11.