[Ark Invest Increases Holdings of Circle Stock by $965,000 and Bullish Stock by $867,000 Yesterday] According to The Block, Cathie Wood's Ark Invest bought 12,835 shares of Circle Internet Group stock on Tuesday, worth approximately $965,448; at the same time, it sold 37,754 shares of Bullish stock, worth approximately $866,831. Both stocks rose on the day.