Shares of Nvidia (NASDAQ: NVDA) and Vistra (NYSE: VST) have surged 860% and 700%, respectively, since the beginning of 2023. Both companies have benefited from the artificial intelligence (AI) boom despite operating in very different parts of the economy. Tepper sold 65,000 shares of Nvidia, reducing his position by 9%.

Nvidia stock rose early Wednesday after President Donald Trump sent another signal to markets that artificial intelligence would be a priority under his new administration. The absence of Nvidia CEO Jensen Huang at the inauguration Monday stuck out as Big Tech CEOs thronged to the event.

Nvidia stock surged after the chipmaker was named a technology partner for a massive U.S. AI infrastructure project called Stargate.