JPMorgan Chase has begun publishing research notes on prominent private companies transforming industries, a person familiar with the matter told Reuters on Friday. With many industry-leading private companies delaying public listings, they are attracting a growing share of investor capital, prompting institutional investors to track them more closely at earlier stages. Companies such as ChatGPT-maker OpenAI, Elon Musk's SpaceX and TikTok-parent Bytedance now hold valuations that rival or