| Top Institutional Holders |
|---|
| Holder | Shares | % Out | Value* | Reported |
|---|
| ClearBridge Investments, LLC | 9,541,222 | 8.09 | 522,000,255 | Mar 31, 2013 | | Primecap Management Company | 8,584,691 | 7.28 | 388,285,573 | Feb 28, 2013 | | Vanguard Group, Inc. (The) | 5,653,233 | 4.79 | 309,288,377 | Mar 31, 2013 | | Waddell & Reed Financial Inc. | 5,246,293 | 4.45 | 287,024,690 | Mar 31, 2013 | | Price (T.Rowe) Associates Inc | 3,823,860 | 3.24 | 209,203,380 | Mar 31, 2013 | | State Street Corporation | 3,801,233 | 3.22 | 207,965,457 | Mar 31, 2013 | | BlackRock Institutional Trust Company, N.A. | 3,198,778 | 2.71 | 175,005,144 | Mar 31, 2013 | | BlackRock Fund Advisors | 2,935,622 | 2.49 | 160,607,879 | Mar 31, 2013 | | Artisan Partners Limited Partnership | 2,753,800 | 2.34 | 150,660,398 | Mar 31, 2013 | | FMR, LLC | 13,802,137 | 11.70 | 755,114,915 | Mar 31, 2013 |
|
| Holder | Shares | % Out | Value* | Reported |
|---|
| Fidelity Growth Company Fund | 11,165,294 | 9.47 | 610,853,234 | Mar 31, 2013 | | Vanguard Horizon Fund-Capital Opportunity Portfolio | 3,944,900 | 3.35 | 134,047,702 | Dec 31, 2012 | | Legg Mason Clearbridge Aggressive Growth Fd | 3,007,990 | 2.55 | 164,567,132 | Mar 31, 2013 | | Waddell & Reed Advisors Funds-Science & Technology Fund | 2,823,723 | 2.39 | 154,485,885 | Mar 31, 2013 | | Ivy Science & Technology Fund | 2,022,970 | 1.72 | 110,676,688 | Mar 31, 2013 | | Price (T.Rowe) Mid Cap Growth Fund | 2,000,000 | 1.70 | 109,420,000 | Mar 31, 2013 | | Aston/Fairpointe Mid Cap Fund | 1,792,100 | 1.52 | 98,045,791 | Mar 31, 2013 | | Vanguard Total Stock Market Index Fund | 1,471,725 | 1.25 | 50,009,215 | Dec 31, 2012 | | Vanguard Mid-Cap Index Fund | 1,438,351 | 1.22 | 48,875,166 | Dec 31, 2012 | | iShares Core S&P Midcap Index Fund | 1,317,841 | 1.12 | 72,099,081 | Mar 31, 2013 |
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View Transactions for Insiders & Institutional Holders Value shown is computed using the security's price on the report date given. Currency in USD. |