| Top Institutional Holders |
|---|
| Holder | Shares | % Out | Value* | Reported |
|---|
| Jane Street Holding, LLC | 53,426 | 5.62 | 1,981,036 | Dec 31, 2012 | | Morgan Stanley | 37,500 | 3.95 | 1,148,250 | Mar 31, 2013 | | Knight Capital Group, Inc. | 28,865 | 3.04 | 1,070,314 | Dec 31, 2012 | | Invesco Ltd. | 220,373 | 23.20 | 8,171,430 | Dec 31, 2012 | | Bank of America Corporation | 13,838 | 1.46 | 513,113 | Dec 31, 2012 | | Royal Bank of Canada | 9,166 | 0.96 | 339,875 | Dec 31, 2012 | | Ameriprise Financial, Inc. | 6,919 | 0.73 | 256,556 | Dec 31, 2012 | | Puplava Financial Services, Inc. | 6,400 | 0.67 | 237,312 | Dec 31, 2012 | | UBS AG | 5,966 | 0.63 | 221,219 | Dec 31, 2012 | | Madden Advisory Services, Inc. | 3,990 | 0.42 | 122,173 | Mar 31, 2013 |
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| Holder | Shares | % Out | Value* | Reported |
|---|
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Value shown is computed using the security's price on the report date given. Currency in USD. |