| Top Institutional Holders |
|---|
| Holder | Shares | % Out | Value* | Reported |
|---|
| Guggenheim Capital, LLC | 2,595,980 | 7.06 | 40,627,087 | Mar 31, 2013 | | Invesco Ltd. | 2,556,927 | 6.96 | 40,015,907 | Mar 31, 2013 | | Price (T.Rowe) Associates Inc | 1,894,800 | 5.15 | 29,653,620 | Mar 31, 2013 | | Citadel Advisors LLC | 1,871,462 | 5.09 | 29,288,380 | Mar 31, 2013 | | Vollero Beach Capital Partners, LLC | 1,529,327 | 4.16 | 23,933,967 | Mar 31, 2013 | | Vanguard Group, Inc. (The) | 1,521,850 | 4.14 | 23,816,952 | Mar 31, 2013 | | First Trust Advisors LP | 1,064,207 | 2.89 | 16,654,839 | Mar 31, 2013 | | ADAR Investment Management LLC | 1,060,462 | 2.88 | 16,596,230 | Mar 31, 2013 | | Eaton Vance Management | 1,016,224 | 2.76 | 15,903,905 | Mar 31, 2013 | | Weiss Multi-Strategy Advisers, LLC | 900,000 | 2.45 | 14,085,000 | Mar 31, 2013 |
|
| Holder | Shares | % Out | Value* | Reported |
|---|
| Invesco Small Cap Value Fd | 2,445,612 | 6.65 | 38,273,827 | Mar 31, 2013 | | Price (T.Rowe) Small Cap Stock Fund | 1,395,800 | 3.80 | 21,844,270 | Mar 31, 2013 | | First Tr Exchange Traded Fd-First Tr ISE Revere Natural Gas | 1,064,207 | 2.89 | 16,654,839 | Mar 31, 2013 | | Security Equity Fund-Mid Cap Value Series | 997,659 | 2.71 | 15,613,363 | Mar 31, 2013 | | Nuveen Small Cap Select Fund | 542,259 | 1.48 | 7,071,057 | Apr 30, 2013 | | Royce Opportunity Fund | 525,600 | 1.43 | 8,225,640 | Mar 31, 2013 | | Smallcap World Fund | 520,000 | 1.41 | 8,138,000 | Mar 31, 2013 | | Security Equity Fund-Mid Cap Value Institutional Series | 423,472 | 1.15 | 6,627,336 | Mar 31, 2013 | | iShares Russell 2000 Index Fund | 409,592 | 1.11 | 5,341,079 | Apr 30, 2013 | | Vanguard Small-Cap Index Fund | 382,262 | 1.04 | 5,982,400 | 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. |