RIVN ▼ -3.2% - Rivian Automotive, Inc. $RIVN acquired Third Dimension AI to accelerate autonomous driving development, bringing advanced 3D simulation and synthetic-data technology in-house to support its consumer and robotaxi ambitions. * AI Simulation: Third Dimension's platform converts real-world driving data into detailed, controllable 3D environments, allowing Rivian to recreate complex driving scenarios and test different conditions. * Autonomous Development: The technology enables Rivian to generate training data and validate self-driving systems against rare or dangerous situations without waiting for them to occur on public roads. * Technology Integration: Third Dimension's leadership and engineering teams will join Rivian's Autonomy division, supporting faster development of driver-assistance and autonomous driving capabilities. 22-OCT-2026 05:08 PM ET