Looking today at week-over-week shares outstanding changes among the universe of ETFs covered at ETF Channel, the largest inflow was seen in the Vanguard S&P 500 ETF (VOO), which added 2,900,905 shares, or a 4.1% increase week over week. Among the largest underlying components of VOO, in morning trading today Apple Incorporated (AAPL) is down about 1.4%, and Exxon Mobil Corporation (XOM) is lower by about 0.8%.