Investor relations

Institutional Ownership

View Insider Ownership Information  Ownership > 100%  Ownership Information Shares Outstanding 27,045,124 Short Interest Shares 544,056 Float (%) 88.87 Institutional Ownership (%) 69.40 Mutual Fund Ownership (%) 23.42 Insider Ownership (%) 11.13 Top 10 Instn Holders (%) 39.38 Ownership Activity - Total Positions Description Holders Shares Total Positions 88 18,769,647 New Positions 17 1,594,052 Increased Positions 30 1,210,612 Decreased Positions 27 (2,138,867) Soldout Positions 6 (196,072) Net Change   (928,255) View:  Institutional OwnershipMutual Fund   Owners:    Company Shares %Out Value ($) Reported Change Wilmington Funds Management Corp. 46,670 .17 497,969 3/31/2013 1,410 William Blair Investment Management 959,801 3.55 10,241,077 3/31/2013 60,200 Whitebox Advisors LLC 46,741 .17 498,726 3/31/2013 46,741 Wells Fargo Advisors LLC 1,000 .00 10,670 3/31/2013 1,000 Wall Street Associates LLC 638,200 2.36 6,809,594 3/31/2013 638,200 Vanguard Group Inc. 576,767 2.13 6,154,104 3/31/2013 34,533 UBS Securities LLC 823 .00 8,781 3/31/2013 823 Tower Research Capital LLC 616 .00 6,573 3/31/2013 416 Timpani Capital Management LLC 175,153 .65 1,868,883 3/31/2013 (17,000) Timber Hill LLC 0 .00 0 3/31/2013 (12,717) TIAA-CREF Asset Management LLC 95,597 .35 1,020,020 3/31/2013 (2,897) Teachers Advisors Inc. 30,304 .11 323,344 3/31/2013 0 T. Rowe Price Associates Inc. 600,000 2.22 6,402,000 3/31/2013 (23,537) Susquehanna Financial Group LLLP 22,748 .08 242,721 3/31/2013 22,748 SunAmerica Asset Management Corp. 15,375 .06 164,051 3/31/2013 0 State Street Global Advisors Inc. 273,065 1.01 2,913,604 3/31/2013 (15,267) Spectrum Advisory Services Inc. 19,768 .07 210,925 3/31/2013 0 Spark Investment Management LLC 16,600 .06 177,122 3/31/2013 0 Security Investors LLC 2,633 .01 28,094 3/31/2013 2,633 Russell Investment Group 311,302 1.15 3,321,592 3/31/2013 55,324 RhumbLine Advisers LP 10,478 .04 111,800 3/31/2013 (5,532) Renaissance Technologies LLC 994,700 3.68 10,613,449 3/31/2013 71,200 RBC Dominion Securities Inc. 0 .00 0 3/31/2013 (1,933) ProShare Advisors LLC 12,000 .04 128,040 3/31/2013 12,000 Principal Global Investors LLC 10,008 .04 106,785 3/31/2013 0 Prescott Investors, Inc. 355,158 1.31 3,789,536 3/31/2013 0 Portolan Capital Management LLC 477,253 1.76 5,092,290 3/31/2013 (11,855) Palisade Capital Management LLC 40,000 .15 426,800 3/31/2013 40,000 Oxford Asset Management LLP 0 .00 0 3/31/2013 (15,535) O'Shaughnessy Asset Mgmt LLC 26,007 .10 277,495 3/31/2013 26,007 Oberweis Asset Management Inc. 179,240 .66 1,912,491 3/31/2013 0 Northern Trust Global Investments Ltd. 297,065 1.10 3,169,684 3/31/2013 1,687 Northern Trust Co. of Connecticut 21,735 .08 231,912 3/31/2013 21,735 Nicholas Investment Partners L.P. 250,425 .93 2,672,035 3/31/2013 54,144 Next Century Growth Investors LLC 1,076,739 3.98 11,488,805 3/31/2013 34,073 myCIO Wealth Partners LLC 5 .00 53 3/31/2013 0 Morgan Stanley Smith Barney LLC 20,463 .08 218,340 3/31/2013 (1,498) Morgan Stanley & Co. LLC 7,591 .03 80,996 3/31/2013 (16,336) MindShare Capital Management LLC 68,635 .25 732,335 3/31/2013 (16,510) Millennium Management LLC 20,006 .07 213,464 3/31/2013 20,006 Rows 1 through 40 of 94 Copyright © 2013 FactSet Research Systems Inc. All rights reserved. Copyright 2013, © SNL Financial LC  Terms of Use