Cathie Wood’s ARK Investment Management has reopened positions in Alibaba Group Holding Ltd. after a four-year hiatus, as the Chinese tech giant’s artificial intelligence ambitions fuel a sharp rally in its shares. Ark Investment reported in its daily trading report that two of the exchange-traded funds of the firm acquired American Depositary Receipts (ADRs) of Alibaba on Monday, creating a cumulative ownership of approximately $16.3 million.