| Top Institutional Holders |
|---|
| Holder | Shares | % Out | Value* | Reported |
|---|
| Frontier Capital Management Company Inc | 1,871,203 | 7.20 | 44,459,783 | Mar 31, 2013 | | Oak Ridge Investments, LLC | 1,383,063 | 5.32 | 32,861,576 | Mar 31, 2013 | | Dimensional Fund Advisors LP | 1,191,755 | 4.58 | 28,316,098 | Mar 31, 2013 | | BlackRock Fund Advisors | 969,020 | 3.73 | 23,023,915 | Mar 31, 2013 | | Pembroke Management, LTD | 864,200 | 3.32 | 20,533,392 | Mar 31, 2013 | | Vanguard Group, Inc. (The) | 809,167 | 3.11 | 19,225,807 | Mar 31, 2013 | | Granahan Investment Management Inc. | 598,571 | 2.30 | 14,222,046 | Mar 31, 2013 | | FMR, LLC | 3,442,646 | 13.24 | 81,797,268 | Mar 31, 2013 | | Columbia Wanger Asset Management, L.P. | 2,673,411 | 10.28 | 63,520,245 | Mar 31, 2013 | | Wellington Management Company, LLP | 470,680 | 1.81 | 11,183,356 | Mar 31, 2013 |
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| Holder | Shares | % Out | Value* | Reported |
|---|
| Columbia Acorn Fund | 2,125,000 | 8.17 | 34,913,750 | Dec 31, 2012 | | Pioneer Oak Ridge Small Cap Growth Fund | 909,075 | 3.50 | 21,599,622 | Mar 31, 2013 | | Fidelity Select Portfolios-IT Services | 803,666 | 3.09 | 19,095,104 | Mar 31, 2013 | | Fidelity Export and Multinational Fund | 542,107 | 2.08 | 12,880,462 | Mar 31, 2013 | | Fidelity Select Portfolios - Software & Computer Service | 506,696 | 1.95 | 12,039,096 | Mar 31, 2013 | | iShares Core S&P Smallcap ETF | 348,000 | 1.34 | 8,268,480 | Mar 31, 2013 | | Fidelity Dividend Growth Fund | 345,342 | 1.33 | 8,205,325 | Mar 31, 2013 | | DFA Tax Managed U.S. Targeted Value Port | 322,122 | 1.24 | 6,671,146 | Jan 31, 2013 | | Vanguard Small-Cap Index Fund | 317,924 | 1.22 | 5,223,491 | Dec 31, 2012 | | iShares Russell 2000 Index Fund | 300,647 | 1.16 | 7,143,372 | 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. |
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