Cathie Wood’s ARK Invest ETFs (exchange-traded funds) made several notable portfolio adjustments on Tuesday, September 23, according to daily fund disclosures. The ace hedge fund manager continued trimming exposure to health technology company Tempus AI (TEM) and TV streaming platform Roku (ROKU).
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Wood Trims Tempus and Roku Stakes
The largest trade of the day was the sale of 62,352 shares of Tempus AI through the ARK Innovation ETF (ARKK), totaling $5.35 million. TEM shares have rallied nearly 150% so far this year. Wood is likely reducing exposure to TEM stock due to concerns over the stock’s high valuation and uncertain growth prospects, especially following the Ambry acquisition.
Meanwhile, the ARKK ETF also sold 46,876 shares of Roku, consistent with Wood’s recent selling activity. Wood appears to be booking profits from Roku’s recent price surge, with the stock up 33% so far this year. Following these sales, ROKU has dropped to the fourth-largest holding across ARK’s combined portfolios, down from third place, with a 4.67% weighting.
Wood Accumulates Shares of AACT and ARCT
On the buy side, Wood added to her position in special purpose acquisition company (SPAC) Ares Acquisition Corporation II (AACT). The ARKQ ETF bought 85,142 shares, adding to the prior day’s purchase. AACT shares jumped 6.4% in extended trading yesterday after shareholders approved its merger with Kodiak Robotics, Inc. Following the merger, AACT will shift from the Cayman Islands to Delaware and change its name to Kodiak AI, Inc. The shares are expected to trade on Nasdaq from September 25, 2025, under the ticker symbol “KDK.”
Additionally, the ARK Genomic Revolution ETF (ARKG) added 28,272 shares of biotech firm Arcturus Therapeutics Holdings (ARCT). This move shows ARK’s growing interest in the biotech field, where Arcturus is advancing with its innovative RNA-based treatments for rare liver and respiratory diseases.
Wood also added to her position in Chinese autonomous mobility company Pony AI (PONY), buying 85,142 shares through the ARK Autonomous Technology and Robotics ETF (ARKQ).
Here’s how these stocks perform on TipRanks’ Stock Comparison Tool:
