SIMO ▼ -1.0% - Silicon Motion Technology Corporation $SIMO - Silicon Motion Earns ISO/SAE 21434 Automotive Cybersecurity Process Certification Silicon Motion Technology Corporation gained ISO/SAE 21434 automotive cybersecurity process certification, a standard that validates secure development practices for vehicle systems. Despite this credential achievement, which strengthens the company's positioning for automotive clients, SIMO shares declined 1.0% today. 09-SEP-2026 09:02 AM ET