Check out the companies making the biggest moves in premarket trading: Novo Nordisk — Shares tumbled 10% after the Danish pharmaceutical company's trial for Alzheimer's disease failed to meet its main goal of slowing the disease's progression. Tesla — CEO Elon Musk said on X that the company is close to finalizing its latest artificial-intelligence chip, A15, and is starting work on A16, sending the stock 2% higher. Musk said Tesla's goal is to bring a new AI chip design to volume production every 12 months. Alphabet — The tech giant gained 3.5%. Alphabet was the only "Magnificent Seven" stock that was positive last week. Alphabet launched its latest AI model, Gemini 3 , last week. Alibaba — U.S.-listed shares of the Chinese e-commerce company jumped 4% after announcing its AI-app, Qwen, h

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