Ark Invest has expanded its portfolio by acquiring 13,700 shares of ARKB, with its ARKW fund purchasing 4,496 shares and ARKF fund acquiring 9,204 shares. Additionally, the investment firm has significantly increased its stake in Robinhood, with ARKK buying 96,048 shares and ARKW adding 28,379 shares, bringing the total to over 120,000 shares. This move underscores Ark Invest's renewed interest in crypto-related assets.