Robinhood Markets, Inc. (NASDAQ:HOOD) shares outperformed the market on Thursday, rallying strongly. Cathie Wood’s Ark Invest took advantage of this opportunity to sell some of its holdings. What Happened: Ark through its flagship Ark Innovation ETF (NYSE:ARKK), Ark Next Generation Internet ETF (NYSE:ARKW) and Ark Fintech Innovation ETF (NYSE:ARKF), sold 1,142,482 shares of Robinhood in aggregate, valued at $20.62 million. The details of the buys are as follows: ARKK: 583,563 sharesARKW: 335,891 sharesARKF: 223,028 sharesRobinhood reported that its total funded customer base grew to 23.6 milli…