| Top Institutional Holders |
|---|
| Holder | Shares | % Out | Value* | Reported |
|---|
| Vanguard Group, Inc. (The) | 2,923,919 | 5.71 | 23,245,156 | 31-Mar-2013 | | BlackRock Institutional Trust Company, N.A. | 2,464,152 | 4.81 | 19,590,008 | 31-Mar-2013 | | Wells Fargo & Company | 2,025,116 | 3.95 | 16,099,672 | 31-Mar-2013 | | Renaissance Technologies, LLC | 1,882,300 | 3.68 | 14,964,285 | 31-Mar-2013 | | State Street Corporation | 1,351,286 | 2.64 | 10,742,723 | 31-Mar-2013 | | BlackRock Fund Advisors | 1,321,153 | 2.58 | 10,503,166 | 31-Mar-2013 | | Principal Financial Group, Inc. | 1,103,268 | 2.15 | 8,770,980 | 31-Mar-2013 | | Dimensional Fund Advisors LP | 1,000,723 | 1.95 | 7,955,747 | 31-Mar-2013 | | Morgan Stanley | 831,928 | 1.62 | 6,613,827 | 31-Mar-2013 | | Northern Trust Corporation | 765,039 | 1.49 | 6,082,060 | 31-Mar-2013 |
|
| Holder | Shares | % Out | Value* | Reported |
|---|
| Vanguard Small-Cap Index Fund | 877,084 | 1.71 | 7,841,130 | 31-Dec-2012 | | iShares Russell 2000 Index Fund | 827,320 | 1.62 | 6,577,194 | 31-Mar-2013 | | Vanguard Total Stock Market Index Fund | 715,376 | 1.40 | 6,395,461 | 31-Dec-2012 | | Vanguard Small-Cap Growth Index Fund | 618,073 | 1.21 | 5,525,572 | 31-Dec-2012 | | Vanguard Extended Market Index Fund | 534,321 | 1.04 | 4,776,829 | 31-Dec-2012 | | TIAA-CREF Funds-Small-Cap Equity Fund | 406,100 | 0.79 | 3,399,057 | 31-Jan-2013 | | Legg Mason Charles St.-Batterymarch Us Small Cap Equity | 384,800 | 0.75 | 3,059,160 | 31-Mar-2013 | | iShares Russell 2000 Growth Index Fund | 381,294 | 0.74 | 3,031,287 | 31-Mar-2013 | | College Retirement Equities Fund-Stock Account | 360,630 | 0.70 | 3,224,032 | 31-Dec-2012 | | Principal Small Cap Blend Fund | 329,020 | 0.64 | 2,615,709 | 31-Mar-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. |