iShares U.S. Medical Devices ETF (the Fund), formerly iShares Dow Jones U.S. Medical Devices Index Fund, is an exchange-traded fund (ETF). The Fund seeks investment results that correspond generally to the price and yield performance of the Dow Jones U.S. Select Medical Equipment Index (the Index). The Index measures the performance of the medical equipment sector of the United States equity market, and includes medical equipment companies, such as manufacturers and distributors of medical devices, such as magnetic resonance imaging (MRI) scanners, prosthetics, pacemakers, x-ray machines, and other non-disposable medical devices. The Fund invests in a representative sample of securities included in the Index that collectively has an investment profile similar to the Index. The Funds investment advisor is BlackRock Fund Advisors.