Nvidia Corp. plans to invest as much as $1 billion in the artificial intelligence company Poolside, according to people familiar with the matter — part of a deal that would quadruple the valuation of the AI startup. Most Read from Bloomberg Poolside is in discussions to raise $2 billion at a $12 billion valuation, not including dollars raised. Nvidia’s investment in the round, which has not been previously reported, would start at $500 million, with the potential to reach $1 billion if the startup meets ...