Ark Invest, led by Cathie Wood, has increased its investment in SpaceX by acquiring 147,805 shares valued at approximately $18.32 million. This move follows a previous purchase of $16.6 million in SpaceX shares earlier in the week. Concurrently, Ark Invest reduced its stake in Robinhood by selling 79,220 shares worth about $7.91 million, following a prior sale of $3.9 million in Robinhood shares.