Ambarella is trading 6.3% up now at $67.48 on September 9, 2026, with semiconductor and AI stock strength the strongest available explanation.
- No new company-specific announcement clearly explains the move.
- The Qualcomm–Amazon custom AI-chip collaboration is supporting broader optimism around AI demand.
- Ambarella’s September 3 earnings, Macnica distribution agreement, and Capgemini partnership remain supportive background, not a confirmed intraday catalyst.