ARK Invest, led by Cathie Wood, made significant portfolio changes on September 29, 2026, purchasing approximately $81 million in Nvidia (NVDA) stock while selling about $110 million in AMD shares. The firm acquired 356,681 Nvidia shares across four ETFs following Nvidia’s board expanding its buyback authorization by $150 billion to a total of $235 billion through fiscal 2028. ARK also sold 181,767 AMD shares across four ETFs. Nvidia’s stock has risen 22% in 2026, while AMD has surged 184%. Nvidia reached a $5.56 trillion market cap, and AMD peaked at $615.52.
ARK Invest executed substantial portfolio changes on Tuesday, September 29, 2026. The firm purchased roughly $81 million worth of Nvidia (NVDA) stock while selling about $110 million in Advanced Micro Devices (AMD) shares.
According to reports, ARK bought 356,681 shares of Nvidia across four of its ETFs. The purchase comes after Nvidia‘s board expanded its share-repurchase authorization by $150 billion, bringing the total capacity to $235 billion through fiscal 2028.
ARK sold 181,767 shares of AMD across four ETFs, reducing its exposure to the chipmaker. Nvidia‘s stock value has risen about 22% in 2026, while AMD has climbed approximately 184% in the same timeframe.
Both Nvidia and AMD have been among the biggest gainers of the AI boom. Nvidia‘s market capitalization hit an all-time high of $5.56 trillion in September 2026, while AMD‘s stock reached a peak of $615.52, pushing its market cap above $1 trillion.
Wall Street analysts remain increasingly bullish on both companies. However, some analysts worry about a potential AI bubble, the bursting of which could have severe consequences for the stock market.
