Advisory Board Co: Ownership

Ownership Information
Shares Outstanding 16.00 Mil
Institutional Ownership (%)86.32
Top 10 Institutions (%)55.60
Mutual Fund Ownership (%)2.22
5%/Insider Ownership (%)4.14
Float (%)95.87
Ownership Activity
Description# of HoldersShares
Total Positions 9113,811,766
New Positions90
Soldout Positions520
Net Position Change-30-1,517,646
Buyers491,196,452
Sellers79-2,714,098
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Institution Name Shs Held Shs Chg %Chg $Chg* %Out %Port Rpt Date
Morgan Stanley Investment Management Inc. (US) 1,827,334 -2,593 -0.1 -1,089,947 11.8 0.1 09-30-09
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. 1,363,670 4,300 0.3 -653,145 8.8 0.0 09-30-09
Royce & Associates, LLC 967,979 0 0.0 5,333,564 6.2 0.1 12-31-09
TAMRO Capital Partners, LLC 911,670 80,307 9.7 7,042,220 5.9 2.3 12-31-09
Granahan Investment Management, Inc. 688,750 33,000 5.0 4,624,633 4.4 0.9 12-31-09
Vanguard Group, Inc. 610,340 17,906 3.0 118,394 3.9 0.0 09-30-09
Atlanta Capital Management Company, L.L.C. 528,747 -48,323 -8.4 -1,537,999 3.4 0.3 09-30-09
Lord, Abbett & Co. LLC 397,789 -266,500 -40.1 -7,071,812 2.6 0.0 09-30-09
Columbia Management Advisors, LLC 344,435 10,034 3.0 64,990 2.2 0.0 09-30-09
Frontier Capital Management Company, LLC 333,100 35,800 12.0 733,524 2.1 0.1 09-30-09
State Street Global Advisors (US) 317,662 78,261 32.7 1,833,417 2.0 0.0 09-30-09
FAF Advisors, Inc. 288,117 -57,130 -16.5 -1,629,587 1.9 0.0 09-30-09
RBC Global Asset Management (U.S.) Inc. 246,697 -9,379 -3.7 -379,190 1.6 0.2 09-30-09
Harvest Capital Strategies LLC 230,000 127,699 124.8 3,153,064 1.5 1.5 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 8:46 AM Eastern Time