Plato Learning Inc: Ownership

Ownership Information
Shares Outstanding 24.00 Mil
Institutional Ownership (%)50.17
Top 10 Institutions (%)42.40
Mutual Fund Ownership (%)1.31
5%/Insider Ownership (%).31
Float (%)99.69
Ownership Activity
Description# of HoldersShares
Total Positions 4512,041,127
New Positions50
Soldout Positions220
Net Position Change-18-2,031,692
Buyers16813,473
Sellers34-2,845,165
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Institution Name Shs Held Shs Chg %Chg $Chg* %Out %Port Rpt Date
Rutabaga Capital Management LLC 2,057,645 -167,618 -7.5 -641,804 8.4 1.4 12-31-09
S Squared Technology, LLC 1,606,300 -55,500 -3.3 -175,508 6.6 1.0 12-31-09
Dimensional Fund Advisors, LP 1,363,169 -23,644 -1.7 341,638 5.6 0.0 09-30-09
Security Global Investors, LLC 1,329,750 140,447 11.8 987,308 5.5 0.2 09-30-09
Robeco Investment Management, Inc. 911,816 314,150 52.6 1,548,381 3.7 0.0 09-30-09
Essex Investment Management Company, LLC 911,091 -40,132 -4.2 -136,926 3.7 0.2 12-31-09
Columbia Management Advisors, LLC 560,118 -4,955 -0.9 159,418 2.3 0.0 09-30-09
BlackRock Institutional Trust Company, N.A. 554,729 47,151 9.3 366,117 2.3 0.0 09-30-09
Renaissance Technologies Corp. 478,000 38,500 8.8 306,960 2.0 0.0 09-30-09
Reed, Conner & Birdwell, LLC 392,737 -112,772 -22.3 -325,412 1.6 0.1 09-30-09
Royce & Associates, LLC 309,642 0 0.0 99,085 1.3 0.0 09-30-09
Vanguard Group, Inc. 302,586 54,770 22.1 315,908 1.2 0.0 09-30-09
Ironwood Investment Management, LLC 256,732 -1,800 -0.7 74,954 1.1 0.5 09-30-09
Bridgeway Capital Management, Inc. 151,300 11,355 8.1 93,836 0.6 0.0 09-30-09
Graham Partners, L.P. 112,250 112,250 100.0 484,920 0.5 1.0 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 5:21 AM Eastern Time