Robinhood Markets, Inc. Class A is a company in the U.S. stock market and it is a holding in 5 U.S.-traded ETFs. HOOD has around 6.7M shares in the U.S. ETF market. The largest ETF holder of HOOD is the ARK Innovation ETF (ARKK), with approximately 4.89M shares. Investors may also find of interest that the ETF with the largest allocation to HOOD stock is ARK Innovation ETF (ARKK), with a portfolio weight of 1.19%. On average, U.S. ETFs allocate 0.65% of HOOD to their portfolios.