| Top Institutional Holders |
|---|
| Holder | Shares | % Out | Value* | Reported |
|---|
| Brown Capital Management, Inc. | 1,540,957 | 5.09 | 26,766,423 | 31/03/2013 | | P. Schoenfeld Asset Management | 1,136,765 | 3.76 | 19,745,608 | 31/03/2013 | | DnB Asset Management AS | 1,027,381 | 3.40 | 17,845,607 | 31/03/2013 | | Vanguard Group, Inc. (The) | 852,222 | 2.82 | 14,803,096 | 31/03/2013 | | Adage Capital Partners GP L.L.C. | 800,284 | 2.65 | 13,900,933 | 31/03/2013 | | BlackRock Institutional Trust Company, N.A. | 728,209 | 2.41 | 12,648,990 | 31/03/2013 | | Renaissance Technologies, LLC | 724,738 | 2.40 | 12,588,699 | 31/03/2013 | | BlackRock Fund Advisors | 652,721 | 2.16 | 11,337,763 | 31/03/2013 | | Dimensional Fund Advisors LP | 589,077 | 1.95 | 10,232,267 | 31/03/2013 | | State Street Corporation | 447,843 | 1.48 | 7,779,032 | 31/03/2013 |
|
| Holder | Shares | % Out | Value* | Reported |
|---|
| iShares Russell 2000 Index Fund | 398,914 | 1.32 | 6,929,136 | 31/03/2013 | | Vanguard Small-Cap Index Fund | 382,577 | 1.26 | 4,495,279 | 31/12/2012 | | Vanguard Total Stock Market Index Fund | 293,519 | 0.97 | 3,448,848 | 31/12/2012 | | Vanguard Small-Cap Growth Index Fund | 267,568 | 0.88 | 3,143,924 | 31/12/2012 | | Master Value Opportunities LLC | 246,500 | 0.81 | 2,896,375 | 31/12/2012 | | Brown Capital Management Small Company Fund | 181,200 | 0.60 | 2,129,100 | 31/12/2012 | | PowerShares Exchange Traded Funds Tr-PwrShs Wilderhill Clean | 175,456 | 0.58 | 3,047,670 | 31/03/2013 | | Vanguard Extended Market Index Fund | 151,091 | 0.50 | 1,775,319 | 31/12/2012 | | College Retirement Equities Fund-Stock Account | 113,158 | 0.37 | 1,329,606 | 31/12/2012 | | iShares Russell 2000 Value Index Fund | 112,385 | 0.37 | 1,952,127 | 31/03/2013 |
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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. |
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