Cathie Wood’s ARK Invest bought 28,589 Robinhood Markets shares through the ARK Innovation ETF on Friday, September 4, 2026, in a transaction worth roughly $3.6 million. The purchase represented 0.0528% of ARKK and followed Robinhood’s more than 17% weekly advance, including a gain of over 17% on Thursday. Robinhood shares closed about 2% lower at $122.11 on Friday after reaching $124.88 earlier in the week. ARK also bought 3,392 units of the 3iQ Solana Staking ETF through ARKW and ARKF. The firm cited opportunities in prediction markets, banking and crypto infrastructure as some sell-side firms raised their outlooks on Robinhood. In the second quarter of 2026, event-contract revenue reached $156 million, exceeding crypto revenue of $100 million for the first time, while event contracts traded rose more than tenfold to 13.6 billion and crypto trading volume declined 35% year over year. Robinhood is also facing a dispute with AMC Entertainment over its tokenized AMC stock product. ARK’s trades included additional healthcare and biotechnology purchases and reductions in Tempus AI and Twist Bioscience, with the firm’s disclosures providing no precise execution times or comprehensive rationale for the transactions.