Volcano Corp: Ownership

Ownership Information
Shares Outstanding 49.00 Mil
Institutional Ownership (%)95.49
Top 10 Institutions (%)52.40
Mutual Fund Ownership (%)1.88
5%/Insider Ownership (%)1.89
Float (%)98.11
Ownership Activity
Description# of HoldersShares
Total Positions 13546,791,424
New Positions190
Soldout Positions630
Net Position Change-9-1,269,372
Buyers855,908,360
Sellers94-7,177,732
advertisement
Institution Name Shs Held Shs Chg %Chg $Chg* %Out %Port Rpt Date
Wellington Management Company, LLP 6,776,560 9,540 0.1 19,378,800 13.9 0.1 09-30-09
Capital Research Global Investors 4,632,778 563,700 13.9 21,037,616 9.5 0.0 09-30-09
Waddell & Reed Investment Management Company 2,886,113 140,000 5.1 10,153,761 5.9 0.2 09-30-09
BlackRock Institutional Trust Company, N.A. 2,411,116 128,135 5.6 8,638,897 5.0 0.0 09-30-09
AllianceBernstein L.P. 1,770,894 -119,981 -6.3 3,352,005 3.6 0.0 09-30-09
Vanguard Group, Inc. 1,742,677 112,970 6.9 6,528,523 3.6 0.0 09-30-09
OrbiMed Advisors, LLC 1,504,000 -406,000 -21.3 -1,404,520 3.1 1.1 09-30-09
TimesSquare Capital Management, LLC 1,466,200 -32,700 -2.2 3,706,862 3.0 0.2 09-30-09
Next Century Growth Investors, LLC 1,263,524 25,658 2.1 3,947,107 2.6 1.0 09-30-09
The Boston Company Asset Management, LLC 1,237,222 30,527 2.5 1,206,308 2.5 0.1 12-31-09
Adage Capital Management, L.P. 1,202,174 2,100 0.2 3,443,532 2.5 0.1 09-30-09
Calamos Advisors LLC 1,200,000 0 0.0 3,408,000 2.5 0.1 09-30-09
OppenheimerFunds, Inc. 1,095,948 953,548 669.6 16,443,093 2.3 0.0 09-30-09
Capital World Investors 1,055,000 0 0.0 2,996,200 2.2 0.0 09-30-09
Argyll Research, LLC 952,080 34,454 3.8 3,185,575 2.0 0.1 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 4:40 AM Eastern Time