| Top Institutional Holders |
|---|
| Holder | Shares | % Out | Value* | Reported |
|---|
| FMR LLC | 2,903,513 | 7.33 | 46,311,032 | Dec 31, 2012 | | Price (T.Rowe) Associates Inc | 2,299,477 | 5.80 | 36,676,658 | Dec 31, 2012 | | Gilder, Gagnon, Howe & Co. | 2,299,303 | 5.80 | 36,673,882 | Dec 31, 2012 | | Vanguard Group, Inc. (The) | 1,389,471 | 3.51 | 32,249,621 | Mar 31, 2013 | | Dimensional Fund Advisors LP | 1,159,482 | 2.93 | 18,493,737 | Dec 31, 2012 | | Paradigm Capital Management | 1,133,000 | 2.86 | 26,296,930 | Mar 31, 2013 | | Mairs & Power Inc | 1,132,080 | 2.86 | 18,056,676 | Dec 31, 2012 | | BlackRock Institutional Trust Company, N.A. | 1,057,648 | 2.67 | 24,548,010 | Mar 31, 2013 | | BlackRock Fund Advisors | 1,007,275 | 2.54 | 23,378,852 | Mar 31, 2013 | | Wells Fargo & Company | 4,332,823 | 10.93 | 100,564,821 | Mar 31, 2013 |
|
| Holder | Shares | % Out | Value* | Reported |
|---|
| Wells Fargo Advantage Small Cap Value Fd | 3,260,500 | 8.23 | 63,090,675 | Feb 28, 2013 | | Fidelity OTC Portfolio | 1,965,665 | 4.96 | 38,035,617 | Feb 28, 2013 | | Price (T.Rowe) Small Cap Stock Fund | 1,698,500 | 4.29 | 39,422,185 | Mar 31, 2013 | | Mairs & Power Growth Fund Inc | 892,500 | 2.25 | 20,714,925 | Mar 31, 2013 | | Variable Insurance Products Fund III-Mid-Cap Portfolio | 815,335 | 2.06 | 15,776,732 | Feb 28, 2013 | | iShares Russell 2000 Index Fund | 592,842 | 1.50 | 13,759,862 | Mar 31, 2013 | | Fidelity Select Portfolios - Computers | 557,700 | 1.41 | 10,791,495 | Feb 28, 2013 | | Vanguard Small-Cap Index Fund | 543,199 | 1.37 | 8,664,024 | Dec 31, 2012 | | Royce Opportunity Fund | 480,159 | 1.21 | 11,144,490 | Mar 31, 2013 | | Vanguard Total Stock Market Index Fund | 430,778 | 1.09 | 6,870,909 | Dec 31, 2012 |
|
View Transactions for Insiders & Institutional Holders Value shown is computed using the security's price on the report date given. Currency in USD. |