Natus Medical Inc: Ownership

Ownership Information
Shares Outstanding 28.00 Mil
Institutional Ownership (%)56.42
Top 10 Institutions (%)31.30
Mutual Fund Ownership (%).66
5%/Insider Ownership (%)2.60
Float (%)97.40
Ownership Activity
Description# of HoldersShares
Total Positions 12415,796,930
New Positions220
Soldout Positions790
Net Position Change-45-7,879,875
Buyers703,027,634
Sellers115-10,907,509
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Institution Name Shs Held Shs Chg %Chg $Chg* %Out %Port Rpt Date
Vanguard Group, Inc. 1,256,625 20,534 1.7 5,125,234 4.4 0.0 09-30-09
Thomson Horstmann & Bryant, Inc. 1,160,550 65,000 5.9 260,199 4.1 1.0 12-31-09
AWM Investment Company, Inc. 1,112,865 0 0.0 4,329,045 3.9 2.8 09-30-09
J.P. Morgan Investment Management Inc. (New York) 1,108,137 46,203 4.4 4,843,836 3.9 0.0 09-30-09
Westwood Management Corp. (Texas) 851,719 21,752 2.6 3,564,205 3.0 0.2 09-30-09
Tygh Capital Management, Inc. 820,162 820,162 100.0 12,655,100 2.9 0.5 09-30-09
OppenheimerFunds, Inc. 706,886 308,821 77.6 6,313,581 2.5 0.0 09-30-09
The Boston Company Asset Management, LLC 613,816 -381,346 -38.3 -6,277,011 2.2 0.0 12-31-09
State Street Global Advisors (US) 589,809 141,813 31.7 3,930,879 2.1 0.0 09-30-09
Dimensional Fund Advisors, LP 556,648 23,216 4.4 2,433,274 2.0 0.0 09-30-09
Baron Capital Management, Inc. 544,392 -605,608 -52.7 -4,871,031 1.9 0.1 09-30-09
Cannell Capital Management, L.L.C. 386,000 130,800 51.3 3,010,972 1.4 4.2 09-30-09
Jennison Associates LLC 360,200 -6,400 -1.7 1,327,322 1.3 0.0 09-30-09
Sparta Asset Management, LLC 285,404 -61,891 -17.8 396,000 1.0 1.6 09-30-09
RCM Capital Management LLC 279,453 -25,855 -8.5 788,706 1.0 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 11:24 AM Eastern Time