Westport Innovations Inc: Ownership

Ownership Information
Shares Outstanding 38.00 Mil
Institutional Ownership (%)33.29
Top 10 Institutions (%)20.80
Mutual Fund Ownership (%)14.98
5%/Insider Ownership (%).00
Float (%).00
Ownership Activity
Description# of HoldersShares
Total Positions 6712,652,058
New Positions170
Soldout Positions270
Net Position Change-7-1,150,701
Buyers404,651,305
Sellers47-5,802,006
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Institution Name Shs Held Shs Chg %Chg $Chg* %Out %Port Rpt Date
Wall Street Associates, LLC 1,180,318 196,118 19.9 7,027,861 3.1 1.1 09-30-09
Lord, Abbett & Co. LLC 1,078,721 -227,910 -17.4 3,129,112 2.8 0.0 09-30-09
Essex Investment Management Company, LLC 990,243 78,367 8.6 -113,811 2.6 0.6 12-31-09
Driehaus Capital Management, LLC 888,925 394,562 79.8 7,289,951 2.3 0.6 09-30-09
Arbor Capital Management, LLC (MN) 843,100 843,100 100.0 10,707,370 2.2 1.2 09-30-09
BlackRock Financial Management, Inc. 657,126 -55,142 -7.7 2,583,252 1.7 0.0 09-30-09
Highfields Capital Management, L.P. 635,000 635,000 100.0 8,064,500 1.7 0.1 09-30-09
Cortina Asset Management L.L.C. 603,880 293,660 94.7 5,159,596 1.6 0.6 09-30-09
Perella Weinberg Partners LP 540,565 -34,442 -6.0 2,213,369 1.4 2.8 09-30-09
Columbus Circle Investors 491,300 491,300 100.0 6,239,510 1.3 0.1 09-30-09
Rice Hall James & Associates, LLC 370,312 246,623 199.4 3,702,318 1.0 0.5 09-30-09
Fidelity Management & Research 319,705 56,720 21.6 1,932,705 0.8 0.0 09-30-09
300 North Capital, LLC 256,595 256,595 100.0 3,258,757 0.7 0.6 09-30-09
Luther King Capital Management Corp. 242,885 0 0.0 1,119,700 0.6 0.1 09-30-09
Aviva Investors Global Services Limited 229,179 177,100 340.1 2,489,254 0.6 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 5:02 AM Eastern Time