MKS Instruments Inc: Ownership

Ownership Information
Shares Outstanding 50.00 Mil
Institutional Ownership (%)76.71
Top 10 Institutions (%)45.40
Mutual Fund Ownership (%).64
5%/Insider Ownership (%)8.28
Float (%)91.72
Ownership Activity
Description# of HoldersShares
Total Positions 13838,354,428
New Positions200
Soldout Positions570
Net Position Change-52-1,081,636
Buyers615,395,822
Sellers113-6,477,458
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Institution Name Shs Held Shs Chg %Chg $Chg* %Out %Port Rpt Date
Royce & Associates, LLC 7,265,630 -14,400 -0.2 -14,009,817 14.7 0.5 12-31-09
Dimensional Fund Advisors, LP 4,052,912 -179,156 -4.2 22,571,298 8.2 0.1 09-30-09
Fidelity Management & Research 2,255,922 556,500 32.7 21,186,330 4.6 0.0 09-30-09
Vanguard Group, Inc. 2,077,621 -115,961 -5.3 11,253,642 4.2 0.0 09-30-09
Capital Research Global Investors 1,393,715 1,393,715 100.0 26,884,762 2.8 0.0 09-30-09
The Boston Company Asset Management, LLC 1,207,224 148,900 14.1 590,628 2.4 0.1 12-31-09
Eagle Asset Management, Inc. 1,157,178 304,475 35.7 3,686,256 2.3 0.2 12-31-09
Alydar Partners, L.L.C. 1,150,000 1,150,000 100.0 22,183,500 2.3 1.2 09-30-09
State Street Global Advisors (US) 1,143,783 65,641 6.1 7,896,788 2.3 0.0 09-30-09
Granahan Investment Management, Inc. 971,100 11,450 1.2 -1,614,509 2.0 0.7 12-31-09
Integrity Asset Management, LLC 888,340 -37,934 -4.1 4,964,839 1.8 0.8 09-30-09
Goldman Sachs Asset Management (US) 796,005 67,280 9.2 5,779,490 1.6 0.0 09-30-09
Northern Trust Investments, N.A. 735,827 377,721 105.5 9,488,590 1.5 0.0 09-30-09
Columbia Management Advisors, LLC 649,082 3,814 0.6 4,041,970 1.3 0.0 09-30-09
AQR Capital Management, LLC 620,786 -26,705 -4.1 3,466,930 1.3 0.2 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 11:23 AM Eastern Time