Advisory Board Co: Ownership

Ownership Information
Shares Outstanding 16.00 Mil
Institutional Ownership (%)96.33
Top 10 Institutions (%)60.80
Mutual Fund Ownership (%)1.84
5%/Insider Ownership (%)4.14
Float (%)95.87
Ownership Activity
Description# of HoldersShares
Total Positions 9415,412,715
New Positions80
Soldout Positions760
Net Position Change-59-4,818,339
Buyers49974,626
Sellers108-5,792,965
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Institution Name Shs Held Shs Chg %Chg $Chg* %Out %Port Rpt Date
Morgan Stanley Investment Management Inc. (US) 1,829,927 2,385 0.1 16,728,478 11.8 0.1 06-30-09
TimesSquare Capital Management, LLC 1,515,512 26,600 1.8 -165,066 9.8 0.4 09-30-09
T. Rowe Price Associates, Inc. 1,359,370 -7,780 -0.6 12,268,462 8.8 0.0 06-30-09
Royce & Associates, LLC 967,979 6,700 0.7 -369,878 6.2 0.1 09-30-09
TAMRO Capital Partners, LLC 831,363 334,930 67.5 8,142,138 5.4 1.8 09-30-09
Barclays Global Investors, N.A. 731,575 11,421 1.6 6,861,325 4.7 0.0 06-30-09
Lord, Abbett & Co. LLC 664,289 -579,929 -46.6 -3,556,907 4.3 0.0 06-30-09
Granahan Investment Management, Inc. 655,750 -48,650 -6.9 -1,617,525 4.2 0.6 09-30-09
Vanguard Group, Inc. 592,434 30,104 5.4 5,902,123 3.8 0.0 06-30-09
Atlanta Capital Management Company, L.L.C. 577,070 -7,153 -1.2 5,144,282 3.7 0.3 06-30-09
Waddell & Reed Investment Management Company 423,525 -103,275 -19.6 2,150,249 2.7 0.0 06-30-09
FAF Advisors, Inc. 345,247 -171,107 -33.1 311,699 2.2 0.0 06-30-09
Columbia Management Advisors, LLC 344,435 10,034 3.0 64,990 2.2 0.0 09-30-09
Tiger Management, L.L.C. 339,036 0 0.0 3,092,008 2.2 0.3 06-30-09
Frontier Capital Management Company, LLC 333,100 35,800 12.0 733,524 2.1 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 11/24/2009 9:02 PM Eastern Time