AtriCure Inc: Ownership

Ownership Information
Shares Outstanding 15.00 Mil
Institutional Ownership (%)23.96
Top 10 Institutions (%)21.20
Mutual Fund Ownership (%).49
5%/Insider Ownership (%)16.79
Float (%)83.21
Ownership Activity
Description# of HoldersShares
Total Positions 273,593,658
New Positions70
Soldout Positions210
Net Position Change-12-2,427,007
Buyers13244,100
Sellers25-2,671,107
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Institution Name Shs Held Shs Chg %Chg $Chg* %Out %Port Rpt Date
Camden Partners Holdings, L.L.C. 1,026,721 0 0.0 1,252,600 6.7 11.4 09-30-09
Thomson Horstmann & Bryant, Inc. 504,872 0 0.0 666,431 3.3 0.2 12-31-09
William Harris Investors Inc. 296,200 24,169 8.9 445,956 1.9 0.6 09-30-09
MFS Investment Management 275,530 -11,550 -4.0 295,722 1.8 0.0 09-30-09
MindShare Capital Management, LLC 238,065 43,550 22.4 442,865 1.6 1.9 09-30-09
Zeke, L.P. 200,000 0 0.0 244,000 1.3 1.4 09-30-09
Dimensional Fund Advisors, LP 178,446 14,040 8.5 266,844 1.2 0.0 09-30-09
Wasatch Advisors, Inc. 170,000 -20,000 -10.5 137,400 1.1 0.0 09-30-09
Renaissance Technologies Corp. 160,200 1,300 0.8 199,994 1.0 0.0 09-30-09
Bridgeway Capital Management, Inc. 133,200 0 0.0 162,504 0.9 0.0 09-30-09
Vanguard Group, Inc. 96,542 0 0.0 117,781 0.6 0.0 09-30-09
Pennsylvania Public School Employees Retirement System 92,200 -13,700 -12.9 64,534 0.6 0.0 09-30-09
Sterling Johnston Capital Management, L.P. 75,800 75,800 100.0 357,776 0.5 0.1 09-30-09
Perkins Capital Management, Inc. 28,258 28,258 100.0 133,378 0.2 0.1 09-30-09
Craig Drill Capital, L.L.C. 21,800 21,800 100.0 102,896 0.1 0.3 09-30-09
*Category Headings:
Shs Held - shares held at report date
Shs Chg - position change within reporting period
%Chg - % change
$Chg - market value of the position change
%Out - % of shares outstanding
%Port - % Portfolio
Rpt Date - report date
Page generated 2/10/2010 1:50 AM Eastern Time