| Top Institutional Holders |
|---|
| Holder | Shares | % Out | Value* | Reported |
|---|
| SRS Investment Management, LLC | 4,730,183 | 5.44 | 122,180,626 | Mar 31, 2013 | | Vanguard Group, Inc. (The) | 4,157,639 | 4.78 | 107,391,815 | Mar 31, 2013 | | Eagle Asset Management, Inc. | 3,912,804 | 4.50 | 101,067,727 | Mar 31, 2013 | | Westfield Capital Management Company | 3,113,445 | 3.58 | 80,420,284 | Mar 31, 2013 | | Wellington Management Company, LLP | 2,907,944 | 3.34 | 75,112,193 | Mar 31, 2013 | | BlackRock Fund Advisors | 2,290,428 | 2.63 | 59,161,755 | Mar 31, 2013 | | BlackRock Institutional Trust Company, N.A. | 2,104,579 | 2.42 | 54,361,275 | Mar 31, 2013 | | Maverick Capital Ltd. | 2,077,208 | 2.39 | 53,654,282 | Mar 31, 2013 | | Massachusetts Financial Services Co. | 1,876,003 | 2.16 | 48,457,157 | Mar 31, 2013 | | FMR, LLC | 10,037,279 | 11.53 | 259,262,916 | Mar 31, 2013 |
|
| Holder | Shares | % Out | Value* | Reported |
|---|
| Fidelity Growth Company Fund | 6,342,742 | 7.29 | 163,833,025 | Mar 31, 2013 | | Eagle Series Tr-Eagle Small Cap Growth Fund | 1,661,864 | 1.91 | 42,925,947 | Mar 31, 2013 | | Vanguard Explorer Fund, Inc. | 1,414,300 | 1.63 | 31,411,603 | Jan 31, 2013 | | iShares Russell 2000 Index Fund | 1,369,284 | 1.57 | 35,368,605 | Mar 31, 2013 | | Vanguard Small-Cap Index Fund | 1,280,886 | 1.47 | 27,820,843 | Dec 31, 2012 | | Vanguard Total Stock Market Index Fund | 1,025,337 | 1.18 | 22,270,319 | Dec 31, 2012 | | Prudential Jennison Small Company Fd | 970,625 | 1.12 | 25,071,243 | Mar 31, 2013 | | Vanguard Small-Cap Growth Index Fund | 900,004 | 1.03 | 19,548,086 | Dec 31, 2012 | | Blackrock Funds-Small Cap Growth Equity Portfolio | 814,741 | 0.94 | 17,696,174 | Dec 31, 2012 | | Fidelity Blue Chip Growth Fund | 767,063 | 0.88 | 19,813,237 | 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. |