Why Quantum Computing Stock Xanadu Quantum Technologies Plummeted 56.2% in September

Xanadu Quantum Technologies stock fell 56.2% in September 2026, primarily due to the expiration of a post-merger lockup period on September 22 that allowed early investors and insiders to sell shares. Despite the decline, the company announced positive developments including collaborations with ASML and AMD, and received an outperform rating from RBC Capital with a $16 price target.