iShares High Yield Muni Active ETF is a U.S.-listed, actively managed fixed-income exchange-traded fund sponsored by BlackRock that seeks to provide shareholders with as high a level of income exempt from federal income taxes as is consistent with the Fund’s investment policies. Established as an ETF on February 7, 2025, with predecessor mutual fund history dating to August 1, 2006, it is headquartered in New York and trades on Cboe BZX under the ticker HIMU. The fund invests in a diversified portfolio of high-yield and investment-grade municipal bonds; its portfolio management approach emphasizes flexible credit research, active security selection, and income generation, with monthly distributions, a net expense ratio of 0.39%, and a broad holding base across U.S. municipal issuers. Its municipal exposure spans a range of sectors, credit qualities, and maturities, including state and local general obligations, revenue bonds, infrastructure-related debt, healthcare, transportation, and special tax-backed obligations, with geographic concentration in Florida, Texas, California, Puerto Rico, New York, Wisconsin, Colorado, and other U.S. jurisdictions. Recent company changes include the fund’s conversion from an open-end mutual fund to an ETF on February 7, 2025, continued portfolio and distribution updates during 2026, and the maintenance of a fee waiver arrangement by BlackRock Fund Advisors through June 30, 2027.