iShares Core Total USD Bond Market ETF is a company in the U.S. stock market and it is a holding in 6 U.S.-traded ETFs. IUSB has around 44.7M shares in the U.S. ETF market. The largest ETF holder of IUSB is the iShares Core Moderate Allocation ETF (AOM), with approximately 15.23M shares. Investors may also find of interest that the ETF with the largest allocation to IUSB stock is iShares Core Conservative Allocation ETF (AOK), with a portfolio weight of 58.51%. On average, U.S. ETFs allocate 28.46% of IUSB to their portfolios.