Silicon Laboratories Inc: Ownership

Ownership Information
Shares Outstanding 46.00 Mil
Institutional Ownership (%)87.50
Top 10 Institutions (%)34.60
Mutual Fund Ownership (%)1.19
5%/Insider Ownership (%)7.21
Float (%)92.79
Ownership Activity
Description# of HoldersShares
Total Positions 23740,250,088
New Positions320
Soldout Positions710
Net Position Change-78-3,053,297
Buyers1045,635,870
Sellers182-8,689,167
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Institution Name Shs Held Shs Chg %Chg $Chg* %Out %Port Rpt Date
William Blair & Company, L.L.C. 2,449,689 -206,590 -7.8 -4,629,140 5.4 0.4 12-31-09
Franklin Advisers, Inc. 2,365,448 -681,139 -22.4 -6,047,205 5.2 0.4 09-30-09
T. Rowe Price Associates, Inc. 1,725,500 -541,100 -23.9 -6,091,288 3.8 0.0 09-30-09
Vanguard Group, Inc. 1,669,850 35,373 2.2 15,336,810 3.7 0.0 09-30-09
Fidelity Management & Research 1,625,106 1,383,000 571.2 66,144,728 3.6 0.0 09-30-09
Friess Associates LLC 1,387,734 402,239 40.8 26,906,248 3.0 0.7 09-30-09
American Century Investment Management, Inc. 1,259,032 -8,995 -0.7 10,209,059 2.8 0.1 09-30-09
Rainier Investment Management, Inc. 1,245,445 -325,970 -20.7 -1,943,512 2.7 0.4 09-30-09
Calamos Advisors LLC 1,100,000 -2,070 -0.2 9,139,381 2.4 0.3 09-30-09
State Street Global Advisors (US) 1,088,340 17,946 1.7 9,801,878 2.4 0.0 09-30-09
MFS Investment Management 998,604 -820,400 -45.1 -22,790,492 2.2 0.1 09-30-09
Next Century Growth Investors, LLC 824,882 705,350 590.1 33,701,704 1.8 1.8 09-30-09
Wasatch Advisors, Inc. 795,912 -64,254 -7.5 4,229,375 1.7 0.9 09-30-09
Neuberger Berman, LLC 594,727 -48,078 -7.5 3,157,810 1.3 0.0 09-30-09
Lord, Abbett & Co. LLC 580,930 42,199 7.8 6,470,912 1.3 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 11:06 AM Eastern Time