Investment Shake-Up: A Billionaire's Big Bet on AI

Ken Griffin, the mastermind behind Citadel Advisors, has made a bold move in the investment world. Citadel is known for its success and Griffin's knack for spotting trends. With a net worth of $51.8 billion, Griffin's decisions often make waves.

Investment Shifts

In the third quarter, Citadel sold 1.6 million Amazon shares. At the same time, they bought 388,000 shares of Palantir Technologies. Palantir's stock has skyrocketed over 1,000% since January 2024. That's a huge jump compared to Nvidia's 281% gain in the same period.

Amazon's Strong Performance

Amazon is a giant in e-commerce, advertising, and cloud computing. The company has been pouring money into AI to boost sales and profits. Despite Amazon's strong performance, Griffin decided to sell. This could just be a smart move to lock in profits, not a lack of faith in Amazon.

Palantir's Rise

On the other hand, Palantir is making waves in data analytics and AI. Their software is used by both public and private sectors. In 2025, Forrester Research named Palantir the top AI/ML platform, even beating Google and Microsoft. Palantir's revenue grew 63% in Q3, and earnings more than doubled.

The Catch

But here's the catch: Palantir's stock is expensive. It's trading at 119 times sales, the highest in the S&P 500. The stock price has jumped 11 times since January 2024, but revenue hasn't kept up. This trend can't last forever. At some point, the stock might face a big correction.