Plenty of tech companies are all-in on artificial intelligence, but perhaps two of the most prominent players in AI's growth are semiconductor companies that have been at the forefront of AI processing for years.

At the moment, artificial intelligence (AI) looks like it will continue to be a dominant theme across the market in 2025, so you might want to start by looking at companies that compete in that arena.

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.