Rivian Stock (RIVN) News Today: Autonomy+ Pricing, Custom AI Chip, and 2026 R2 Forecasts Power a December Surge
December 20, 2025 — Rivian Automotive, Inc. (NASDAQ: RIVN) is ending 2025 with one of its strongest bursts of stock-market momentum since 2023, as investors re-rate the company less as a niche EV maker and more as a “software-defined vehicle”