Stamps.com Inc: Ownership

Ownership Information
Shares Outstanding 16.00 Mil
Institutional Ownership (%)62.23
Top 10 Institutions (%)43.50
Mutual Fund Ownership (%)1.59
5%/Insider Ownership (%)18.96
Float (%)81.04
Ownership Activity
Description# of HoldersShares
Total Positions 869,956,077
New Positions50
Soldout Positions520
Net Position Change-68-1,741,785
Buyers24727,849
Sellers92-2,469,634
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Institution Name Shs Held Shs Chg %Chg $Chg* %Out %Port Rpt Date
Renaissance Technologies Corp. 1,270,800 8,100 0.6 1,047,204 8.1 0.0 09-30-09
Wellington Management Company, LLP 985,977 187,254 23.4 2,347,116 6.2 0.0 09-30-09
Bares Capital Management, Inc. 977,323 200,173 25.8 2,450,006 6.2 4.8 09-30-09
BlackRock Institutional Trust Company, N.A. 705,640 -15,194 -2.1 414,498 4.5 0.0 09-30-09
Disciplined Growth Investors, Inc 682,582 -10,925 -1.6 432,945 4.3 0.5 09-30-09
Vanguard Group, Inc. 654,661 -15,761 -2.4 370,435 4.1 0.0 09-30-09
Dimensional Fund Advisors, LP 450,813 -3,902 -0.9 314,037 2.9 0.0 09-30-09
PNC Wealth Management 446,610 0 0.0 343,890 2.8 0.0 09-30-09
Sarbit Advisory Services Inc. 366,039 0 0.0 281,850 2.3 13.5 09-30-09
Putnam Investment Management, L.L.C. 345,241 -264,859 -43.4 -1,980,169 2.2 0.0 09-30-09
State Street Global Advisors (US) 304,380 74,145 32.2 863,122 1.9 0.0 09-30-09
GAMCO Investors, Inc. 247,502 112,502 83.3 1,144,594 1.6 0.0 09-30-09
DuPont Capital Management Corporation 223,620 -2,600 -1.1 -79,955 1.4 0.0 12-31-09
Northern Trust Investments, N.A. 127,253 18,892 17.4 258,189 0.8 0.0 09-30-09
Templeton Investment Counsel, LLC 96,500 5,200 5.7 118,401 0.6 0.0 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 6:30 AM Eastern Time