Cubist Pharmaceuticals Inc: Ownership

Ownership Information
Shares Outstanding 58.00 Mil
Institutional Ownership (%)100.51
Top 10 Institutions (%)57.20
Mutual Fund Ownership (%)3.14
5%/Insider Ownership (%).51
Float (%)99.49
Ownership Activity
Description# of HoldersShares
Total Positions 19958,296,596
New Positions310
Soldout Positions1140
Net Position Change-104-12,473,450
Buyers956,734,177
Sellers199-19,207,628
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Institution Name Shs Held Shs Chg %Chg $Chg* %Out %Port Rpt Date
Federated Investors, Inc. 8,096,177 -388,014 -4.6 8,027,554 14.0 0.9 09-30-09
Wellington Management Company, LLP 7,421,162 1,442,212 24.1 38,214,276 12.8 0.1 06-30-09
Barclays Global Investors, N.A. 4,781,060 353,907 8.0 15,208,607 8.3 0.0 06-30-09
Vanguard Group, Inc. 2,860,242 -51,499 -1.8 4,792,153 4.9 0.0 06-30-09
T. Rowe Price Associates, Inc. 2,361,100 -35,800 -1.5 4,065,679 4.1 0.0 06-30-09
State Street Global Advisors (US) 2,028,055 -424,618 -17.3 -2,951,482 3.5 0.0 06-30-09
Fidelity Management & Research 1,576,112 -1,548,220 -49.6 -22,223,940 2.7 0.0 06-30-09
OrbiMed Advisors, LLC 1,537,000 0 0.0 3,027,890 2.7 1.3 06-30-09
Mazama Capital Management, Inc. 1,473,565 -219,216 -13.0 -683,451 2.5 3.2 06-30-09
Lord, Abbett & Co. LLC 1,050,470 4,700 0.4 2,146,318 1.8 0.1 06-30-09
Renaissance Technologies Corp. 967,673 -138,080 -12.5 -352,673 1.7 0.1 06-30-09
Palo Alto Investors, LLC 833,386 32,455 4.1 2,172,734 1.4 2.1 06-30-09
Fred Alger Management, Inc. 772,567 -869,026 -52.9 -12,695,308 1.3 0.2 06-30-09
Leuthold Weeden Capital Management 743,121 743,121 100.0 13,621,408 1.3 0.7 06-30-09
Batterymarch Financial Management, Inc. 701,731 -24,658 -3.4 979,005 1.2 0.2 06-30-09
*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 11/24/2009 10:00 PM Eastern Time