| Top Institutional Holders |
|---|
| Holder | Shares | % Out | Value* | Reported |
|---|
| Adage Capital Partners GP L.L.C. | 164,000 | 5.63 | 644,520 | Mar 31, 2013 | | Renaissance Technologies, LLC | 104,132 | 3.58 | 409,238 | Mar 31, 2013 | | Dimensional Fund Advisors LP | 66,790 | 2.29 | 262,484 | Mar 31, 2013 | | Vanguard Group, Inc. (The) | 20,357 | 0.70 | 80,003 | Mar 31, 2013 | | Ancora Advisors, LLC | 17,141 | 0.59 | 67,364 | Mar 31, 2013 | | Geode Capital Management, LLC | 11,605 | 0.40 | 45,607 | Mar 31, 2013 | | CALPERS (California-Public Employees Retirement System) | 7,892 | 0.27 | 31,015 | Mar 31, 2013 | | BlackRock Advisors, LLC | 682 | 0.02 | 2,680 | Mar 31, 2013 | | UBS AG | 333 | 0.01 | 1,308 | Mar 31, 2013 | | Citigroup Inc. | 16 | 0.00 | 62 | Mar 31, 2013 |
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| Holder | Shares | % Out | Value* | Reported |
|---|
| DFA U.S. Small Cap Value Series | 27,146 | 0.93 | 7,057 | Jan 31, 2013 | | Vanguard Extended Market Index Fund | 19,787 | 0.68 | 5,738 | Dec 31, 2012 | | DFA U.S. Small Cap Series | 8,757 | 0.30 | 2,276 | Jan 31, 2013 | | DFA U.S. Micro Cap Series | 8,729 | 0.30 | 2,269 | Jan 31, 2013 | | Spartan Total Market Index Fund | 5,684 | 0.20 | 22,338 | Mar 31, 2013 | | Spartan Extended Market Index Fund | 5,749 | 0.20 | 22,593 | Mar 31, 2013 | | Ancora MicroCap Fd | 5,059 | 0.17 | 19,881 | Mar 31, 2013 | | DFA Tax-Managed U.S. Small Cap Portfolio | 4,272 | 0.15 | 1,110 | Jan 31, 2013 | | DFA U.S. Core Equity 2 Portfolio | 2,409 | 0.08 | 626 | Jan 31, 2013 | | DFA U.S. Vector Equity Portfolio | 2,154 | 0.07 | 560 | 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. |