Cathie Wood’s Ark Invest goes all in on AI stock

Cathie Wood’s Ark Invest bets big on emerging health-tech leader, Tempus AI, with latest multi-million dollar investment.

Cathie Wood, the CEO and co-founder of investment firm Ark Invest renowned for her proactive approach to asset maneuvers, is currently diversifying her portfolio with fresh acquisitions. This time, Wood’s focus is turned to the native stock of the health artificial intelligence firm Tempus AI, TEM.

On May 28, 2025, Wood’s Ark funds acquired 251,080 TEM, valued at approximately $13.9 million based on the stock’s closing price as of May 30. The purchase followed a short-term dip in Tempus AI’s share price, echoing Ark’s strategy of buying during market pullbacks.

Tempus AI, which recently went public leverages artificial intelligence to personalize cancer care and other complex medical treatments. The investment aligns with Wood’s belief in AI as a transformative force across sectors such as healthcare.

Wood’s Ark’s latest move is not isolated, but part of a broader buying trend that began in June 2024. With its latest purchase, Ark Invest’s total holdings in Tempus AI have surged to $284.8 million, making it the sixth-largest position across its actively managed ETFs and accounting for roughly 5% of its total portfolio.