| Top Institutional Holders |
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| Holder | Shares | % Out | Value* | Reported |
|---|
| Vanguard Group, Inc. (The) | 1,356,176 | 6.97 | 100,750,315 | Mar 31, 2013 | | Neuberger Berman Group, LLC | 1,283,668 | 6.60 | 95,363,695 | Mar 31, 2013 | | Invesco Ltd. | 1,130,792 | 5.81 | 84,006,537 | Mar 31, 2013 | | BlackRock Fund Advisors | 1,000,771 | 5.14 | 74,347,277 | Mar 31, 2013 | | Atlanta Capital Management Company LLC | 698,369 | 3.59 | 51,881,833 | Mar 31, 2013 | | First Trust Advisors LP | 686,172 | 3.53 | 50,975,717 | Mar 31, 2013 | | BlackRock Institutional Trust Company, N.A. | 543,106 | 2.79 | 40,347,344 | Mar 31, 2013 | | Royce & Associates, LLC | 527,800 | 2.71 | 39,210,262 | Mar 31, 2013 | | Dimensional Fund Advisors LP | 513,240 | 2.64 | 38,128,599 | Mar 31, 2013 | | Brown Capital Management, Inc. | 1,985,455 | 10.20 | 147,499,451 | Mar 31, 2013 |
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| Holder | Shares | % Out | Value* | Reported |
|---|
| Brown Capital Management Small Company Fund | 1,043,762 | 5.36 | 62,980,599 | Dec 31, 2012 | | Neuberger & Berman Genesis Fund | 979,389 | 5.03 | 72,758,808 | Mar 31, 2013 | | Buffalo Small Cap Fund | 631,300 | 3.24 | 38,092,642 | Dec 31, 2012 | | Pennsylvania Mutual Fund Inc | 455,000 | 2.34 | 33,801,950 | Mar 31, 2013 | | Invesco Small Cap Growth Fund | 378,829 | 1.95 | 28,143,206 | Mar 31, 2013 | | MET Investors Ser Tr-Invesco Small Cap Growth Portfolio | 349,369 | 1.80 | 21,080,925 | Dec 31, 2012 | | iShares Core S&P Smallcap ETF | 334,906 | 1.72 | 24,880,166 | Mar 31, 2013 | | Vanguard Small-Cap Index Fund | 332,488 | 1.71 | 20,062,325 | Dec 31, 2012 | | iShares Russell 2000 Index Fund | 325,304 | 1.67 | 24,166,834 | Mar 31, 2013 | | Fidelity Small Cap Growth Fund | 288,199 | 1.48 | 19,744,513 | Jan 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. |