Bill Ackman of Pershing Square Capital Management and Andreas Halvorsen of Viking Global Investors are two billionaires worth following for investment ideas. They are entrusted with billions in assets to manage for clients, and that reflects a career of making smart investment choices.

Artificial intelligence, automation and robotics are disrupting virtually every industry. In recent years, the world has gotten a firsthand look at remarkable advances in AI technology, including OpenAI's ChatGPT AI chatbot,

During that time, Appian has evolved into an artificial intelligence (AI)-based process automation company, which is sometimes called low-code or process mining. It's streamlined its business through layoffs and cost cuts,

Some investors might be reluctant to chase those breakneck gains, but plenty of overlooked AI stocks could still go parabolic in the future. Let's take a look at three stocks that fit this description: Innodata (NASDAQ: INOD), MicroStrategy (NASDAQ: MSTR), and Lumen Technologies (NYSE: LUMN).