Ark Invest, led by Cathie Wood, has purchased 52,455 shares of Circle, valued at $3.28 million, following a 17.6% drop in Circle's stock price. The investment firm also expanded its holdings in other crypto-related stocks, acquiring 133,803 shares of Bullish for $3.13 million, 16,081 shares of Coinbase for $2.35 million, and 16,028 shares of Robinhood for $1.6 million.