iShares Nasdaq Biotechnology ETF (the Fund), formerly iShares Nasdaq Biotechnology Index Fund, is an exchange-traded fund (ETF). The Fund seeks investment results that correspond generally to the price and yield performance of the NASDAQ Biotechnology Index (the Index). The Index contains securities of NASDAQ listed companies that are classified according to the Industry Classification Benchmark as either biotechnology or pharmaceuticals, which also meet other eligibility criteria determined by NASDAQ. The Fund invests in a representative sample of securities included in the Index that collectively has an investment profile similar to the Index. Due to the use of representative sampling, the Fund may or may not hold all of the securities that are included in the Index. The Fund's investment advisor is BlackRock Fund Advisors, which is indirectly owned by BlackRock, Inc.