Check out the companies making the biggest moves midday: CSX — The railroad operator rose more than 3% after it named Steve Angel chief executive , replacing Joe Hinrichs. The management shake-up follows pressure by activist investor Ancora Holdings, which criticized declining efficiency at CSX and pushed for the company to consider mergers and acquisitions as the industry consolidates. Merus — The biotech company popped 36% after it agreed to be acquired by Denmark-based Genmab for $8 billion, or $97 per share , in cash. The deal is expected to close in the first quarter of 2026. Pony AI — The Chinese autonomous vehicle tech company surged 9% after Citi initiated coverage of the stock with a buy rating and a price target that signaled 37% upside from Friday's close. Citi said China's "rob

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