Ark Invest sold shares of the hot IPO three times last week.Widely followed growth investor Cathie Wood added to several of her existing positions on Friday. Countering those purchases, the founder, CEO, and chief investment officer at Ark Invest only lightened one of her stakes across three of her most popular exchange-traded funds (ETFs): She sold a chunk of her shares in Circle Internet Group (CRCL 17.15%).It was the lone sell for Ark Innovation ETF (ARKK 1.70%), Wood's largest aggressive growth fund wit ...