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Westport Innovations Inc (WPRT) Ownership Data

Short Interest History (%)

This is the historical short interest of Westport Innovations Inc, as measured by the Short Percentage Of Float.

Date Short Interest
August 14, 20159.42
July 31, 20159.74
July 15, 201510.56
June 30, 201510.49
June 15, 201510.63
May 29, 201511.24
May 15, 201511.36
April 30, 201511.5
April 15, 201512.01
March 31, 201512.42
March 13, 201513.17
February 27, 201513.92
February 13, 201514.57
January 30, 201514.02
January 15, 201515.4
December 31, 201415.05
December 15, 201415.53
November 28, 201416.09
November 14, 201415.6
October 31, 201415.78
October 15, 201416.07
September 30, 201416.77
September 15, 201417.05
August 29, 201417.56
August 15, 201416.65
July 31, 201417.51
July 15, 201418.74
June 30, 201418.84
June 13, 201418.65
May 30, 201418.23
May 15, 201418.41
April 30, 201418.8
April 15, 201419.99
March 31, 201419.83
March 14, 201420.35
February 28, 201419.57
February 14, 201422.37
January 31, 201422.02
January 15, 201421.1
December 31, 201320.73
December 13, 201320.13
November 29, 201320.02
November 15, 201320.78
October 31, 201320.83
October 15, 201321.8
September 30, 201319.99
September 13, 201319.56
August 30, 201319.82
August 15, 201319.77
July 31, 201319.08
July 15, 201318.33
June 28, 201318.14
June 14, 201319.21
May 31, 201319.88
May 15, 201322.22
April 30, 201323.39
April 15, 201324.3
March 28, 201324.48
March 15, 201323.44
February 28, 201322.96
February 15, 201322.24
January 31, 201321.87
January 15, 201321.95
December 31, 201222.41
December 14, 201224.14
November 30, 201225.56
November 15, 201226.3
October 31, 201227.38
October 15, 201227.75
September 28, 201227.73
September 14, 201227.54
August 31, 201226.95
August 15, 201227.19
July 31, 201227.9
July 13, 201227.89
June 29, 201228.98
June 15, 201231.47
May 31, 201230.63
May 15, 201231.28
April 30, 201229.28
April 13, 201225.97
March 30, 201218.17
March 15, 201215.26
February 29, 201212.58
February 15, 201214.01
January 31, 201211.47
January 13, 201210.89
December 30, 201111.09
December 15, 201110.59
November 30, 201110.49
November 15, 201110.36
October 31, 20118.15
October 14, 20117.84
September 30, 20117.3
September 15, 20117.36
August 31, 20116.82
August 15, 20116.67
July 29, 20115.5
July 15, 20116.24
June 30, 20117.35
June 15, 20117.2
May 31, 20115.78
May 13, 20114.83
April 29, 20115.81
April 15, 20116.62
March 31, 20117.31
March 15, 20117.36
February 28, 20116.51
February 15, 20115.04
January 31, 20114.17
January 14, 20113.63
December 31, 20103.72
December 15, 20104.44
November 30, 20104.5
November 15, 20104.72
October 29, 20103.95
October 15, 20104.83
September 30, 20105.08
September 15, 20104.99
August 31, 20104.93
August 13, 20105.89
July 30, 20105.11
July 15, 20103.85
June 30, 20103.5
June 15, 20103.84
May 28, 20103.76
May 14, 20103.48
April 30, 20102.9
April 15, 20103.4
March 31, 20102.58
March 15, 20102.58
February 26, 20102.41
February 12, 20101.95
January 29, 20101.59
January 15, 20100.85
December 31, 20090.74
December 15, 20090.91
November 30, 20090.99
November 13, 20091.03
October 30, 20091.11
October 15, 20091.11
September 30, 20091.22
September 15, 20091.03
August 31, 20090.69
August 14, 20090.41
July 31, 20090.33
July 15, 20090.59
June 30, 20090.55
June 15, 20090.37
May 29, 20091.85
May 15, 20091.45
April 30, 20091.05
April 15, 20090.78
March 31, 20090.28
March 13, 20090.23
February 27, 20090.23
February 13, 20090.25
January 30, 20090.23
January 15, 20090.27
December 31, 20080.26
December 15, 20080.27
November 28, 20080.39
November 14, 20080.31
October 31, 20080.15
October 15, 20080.89
September 30, 20081.68
September 15, 20082.02
August 29, 20081.06

Institutional Ownership History (%)

This the Institutional Ownership History of Westport Innovations IncPeter Lynch prefers to buy companies with low institutional ownership.

Date Institutional Ownership
June 30, 20159
March 31, 201510
December 31, 201416
September 30, 201422
June 30, 201428
March 31, 201429
December 31, 201341
September 30, 201347
June 30, 201341
March 31, 201340
December 31, 201248
September 30, 201244
June 30, 201250
March 31, 201252
December 31, 201162
September 30, 201157
June 30, 201158
March 31, 201162
December 31, 201059
September 30, 201056
June 30, 201054
March 31, 201053
December 31, 200954
September 30, 200951
June 30, 200942
March 31, 200938
December 31, 200841
September 30, 200833
June 30, 200818
March 31, 200818
December 31, 200717
September 30, 200718
June 30, 20079
March 31, 200710
December 31, 200610
September 30, 20069
June 30, 200613
March 31, 200613
December 31, 200511
September 30, 200513
June 30, 200514
March 31, 200516
December 31, 200420
September 30, 200417
June 30, 200414
March 31, 200414
December 31, 200314
September 30, 200311
June 30, 200311
March 31, 200313
December 31, 200211
September 30, 200213
June 30, 200214
March 31, 200215
December 31, 20015
September 30, 20013
June 30, 20016
March 31, 20019
December 31, 20003
September 30, 20003

Insider ownership (%)

This is the historical insider ownership of Westport Innovations Inc. It is usually better to buy companies with large insider ownership. The company insiders' interest are more aligned with external shareholders in this case.

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
Kevin G. Douglas3,614,0205.63%2015-05-08

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value($1000)
Susquehanna Financial Group, LLLP   Premium Plus852,3762015-03-311.33N/A3,358
Government Pension Fund of Norway - Global644,8022013-12-311.03N/A12,617
Baillie Gifford & Co Limited.   Premium Plus423,2292015-03-310.66N/A1,664
Trillium Asset Management, LLC   Premium Plus404,8932015-03-310.630.101,595
Baird Robert W & Co, Inc.   Premium Plus394,5822015-03-310.620.021,555
KBC Equity Satellites352,4362014-06-300.560.656,351
KBC Asset Management S.A.352,4362014-06-300.560.656,351
J.P.Morgan Securities Inc.   Premium Plus300,3772015-03-310.47N/A1,183
Ecofin Limited   Premium Plus289,9142015-03-310.450.161,142
Citigroup Inc   Premium Plus177,3072015-03-310.28N/A697

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