Investor relations

Institutional Ownership

View Insider Ownership Information  Ownership > 100%  Ownership Information Shares Outstanding 27,020,520 Short Interest Shares 1,076,680 Float (%) 88.86 Institutional Ownership (%) 73.60 Mutual Fund Ownership (%) 22.71 Insider Ownership (%) 11.14 Top 10 Instn Holders (%) 43.56 Ownership Activity - Increased Positions Description Holders Shares Total Positions 87 19,887,362 New Positions 17 1,594,052 Increased Positions 30 1,210,612 Decreased Positions 27 (1,418,852) Soldout Positions 6 (196,072) Net Change   (208,240) View:  Institutional OwnershipMutual Fund   Owners:    Company Shares %Out Value ($) Reported Change Wall Street Associates LLC 638,200 2.36 6,701,100 3/31/2013 638,200 Cortina Asset Management LLC 554,195 2.05 5,819,048 3/31/2013 554,195 Ariel Investments LLC 1,264,301 4.68 13,275,161 3/31/2013 191,995 Cadence Capital Management LLC 170,930 .63 1,794,765 3/31/2013 170,930 BlackRock Fund Advisors 1,267,796 4.69 13,311,858 3/31/2013 147,382 Grandeur Peak Global Advisors LLC 291,974 1.08 3,065,727 3/31/2013 125,300 AWM Investment Co. Inc. 560,445 2.07 5,884,673 3/31/2013 122,445 Driehaus Capital Management LLC 352,043 1.30 3,696,452 3/31/2013 86,913 Allianz Global Investors U.S. LLC 143,966 .53 1,511,643 3/31/2013 80,295 Renaissance Technologies LLC 994,700 3.68 10,444,350 3/31/2013 71,200 William Blair Investment Management 959,801 3.55 10,077,911 3/31/2013 60,200 Russell Investment Group 311,302 1.15 3,268,671 3/31/2013 55,324 Nicholas Investment Partners L.P. 250,425 .93 2,629,463 3/31/2013 54,144 Whitebox Advisors LLC 46,741 .17 490,781 3/31/2013 46,741 Palisade Capital Management LLC 40,000 .15 420,000 3/31/2013 40,000 Vanguard Group Inc. 576,767 2.13 6,056,054 3/31/2013 34,533 Next Century Growth Investors LLC 1,076,739 3.98 11,305,760 3/31/2013 34,073 O'Shaughnessy Asset Mgmt LLC 26,007 .10 273,074 3/31/2013 26,007 BlackRock Advisors LLC 39,871 .15 418,646 3/31/2013 25,619 Dreyfus Investment Advisors LLC 67,308 .25 706,734 3/31/2013 25,044 Invesco PowerShares Capital Management LLC 32,368 .12 339,864 3/31/2013 23,526 Susquehanna Financial Group LLLP 22,748 .08 238,854 3/31/2013 22,748 Northern Trust Co. of Connecticut 21,735 .08 228,218 3/31/2013 21,735 Geode Capital Management LLC 75,861 .28 796,541 3/31/2013 21,406 Jane Street Capital LLC 21,124 .08 221,802 3/31/2013 21,124 Millennium Management LLC 20,006 .07 210,063 3/31/2013 20,006 Deutsche Bank Investment Management Inc. 47,706 .18 500,913 3/31/2013 14,964 ProShare Advisors LLC 12,000 .04 126,000 3/31/2013 12,000 Axiom International Investors LLC 106,400 .39 1,117,200 3/31/2013 12,000 Managed Account Advisors LLC 16,808 .06 176,484 3/31/2013 9,107 Illinois State Board of Investment 7,900 .03 82,950 6/30/2012 7,900 Guggenheim Funds Investment Advisors LLC 7,730 .03 81,165 3/31/2013 7,730 Citigroup Global Markets Inc. 6,655 .02 69,878 3/31/2013 3,835 Dimensional Fund Advisors Ltd 8,000 .03 84,000 5/31/2012 3,000 Bank of America Merrill Lynch 3,461 .01 36,341 3/31/2013 2,688 Security Investors LLC 2,633 .01 27,647 3/31/2013 2,633 BlackRock Investment Management LLC 59,804 .22 627,942 3/31/2013 1,865 Northern Trust Global Investments Ltd. 297,065 1.10 3,119,183 3/31/2013 1,687 Wilmington Funds Management Corp. 46,670 .17 490,035 3/31/2013 1,410 Wells Fargo Advisors LLC 1,000 .00 10,500 3/31/2013 1,000 Rows 1 through 40 of 47 Copyright © 2013 FactSet Research Systems Inc. All rights reserved. Copyright 2013, © SNL Financial LC  Terms of Use