Rivian (RIVN) Stock Slides After Autonomy & AI Day: After-Hours Moves, New AI Chip, Autonomy+ Pricing, and What to Watch Before the Dec. 12, 2025 Market Open
Rivian stock (NASDAQ: RIVN) fell sharply on Dec. 11, 2025 after the company unveiled its in-house autonomy chip, Autonomy+ subscription pricing, and a LiDAR-based roadmap. Here’s what moved the stock after the bell and what matters before the Dec. 12