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Plug Power Inc (PLUG) Ownership Data

Short Interest History (%)

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

Date Short Interest
August 14, 201519.91
July 31, 201520.06
July 15, 201519.37
June 30, 201518.08
June 15, 201518.44
May 29, 201518.11
May 15, 201518.86
April 30, 201517.67
April 15, 201517.93
March 31, 201519.21
March 13, 201519.34
February 27, 201519.04
February 13, 201518.87
January 30, 201518.71
January 15, 201519.01
December 31, 201419.95
December 15, 201421.4
November 28, 201422.09
November 14, 201421.29
October 31, 201421.67
October 15, 201422.48
September 30, 201422.32
September 15, 201422.52
August 29, 201421.72
August 15, 201423.09
July 31, 201422.82
July 15, 201422.16
June 30, 201419.37
June 13, 201418.69
May 30, 201421.24
May 15, 201425.37
April 30, 201418.31
April 15, 201420.89
March 31, 201421.39
March 14, 201445.57
February 28, 201439.82
February 14, 201438.65
January 31, 201423.28
January 15, 201418.62
December 31, 201314.38
December 13, 201314.64
November 29, 20138.42
November 15, 20138.05
October 31, 20137.48
October 15, 20136.79
September 30, 20135.66
September 13, 20136.13
August 30, 20137.93
August 15, 20137.8
July 31, 20138.53
July 15, 20138.42
June 28, 20138.13
June 14, 20136.17
May 31, 20136.28
May 15, 20136.65
April 30, 20135.96
April 15, 20134.68
March 28, 201311.6
March 15, 20138.31
February 28, 20136.15
February 15, 20136.27
January 31, 20136.2
January 15, 20136.1
December 31, 20126.44
December 14, 20126.56
November 30, 20126.52
November 15, 20126.5
October 31, 20126.68
October 15, 20126.67
September 28, 20126.71
September 14, 20126.89
August 31, 20127.12
August 15, 20127.44
July 31, 20127.59
July 13, 20127.8
June 29, 20128.03
June 15, 20128.45
May 31, 20128.68
May 15, 20129.15
April 30, 20129.19
April 13, 20128.7
March 30, 20128.04
March 15, 201223.78
February 29, 201221.73
February 15, 201221.5
January 31, 201221.22
January 13, 201221.58
December 30, 201121.73
December 15, 201121.36
November 30, 201120.31
November 15, 201118.64
October 31, 201115.21
October 14, 201114.57
September 30, 201113.91
September 15, 201112.36
August 31, 201112.39
August 15, 201110.35
July 29, 201112.26
July 15, 20119.79
June 30, 201111
May 31, 20114.76
April 29, 20113.58
April 15, 20113.32
March 31, 20113.3
March 15, 20112.01
February 28, 20112.83
February 15, 20113.78
January 31, 20112.82
January 14, 20111.09
December 31, 20101.06
December 15, 20101
November 30, 20101.04
November 15, 20101.11
October 29, 20101.04
October 15, 20101
September 30, 20101.05
September 15, 20101.01
August 31, 20101.02
August 13, 20100.99
July 30, 20100.99
July 15, 20101
June 30, 20101
June 15, 20101.03
May 28, 20101.76
May 14, 20101
April 30, 20101.01
April 15, 20100.99
March 31, 20101.4
March 15, 20101.18
February 26, 20100.86
February 12, 20100.87
January 29, 20100.84
January 15, 20100.83
December 31, 20091.12
December 15, 20091.04
November 30, 20091.26
November 13, 20091.32
October 30, 20091.13
October 15, 20091.01
September 30, 20090.89
September 15, 20090.98
August 31, 20090.98
August 14, 20091.01
July 31, 20091.01
July 15, 20091.17
June 30, 20093.25
June 15, 20092.23
May 29, 20092.37
May 15, 20092.26
April 30, 20092.08
April 15, 20092.12
March 31, 20092.54
March 13, 20092.79
February 27, 20093.18
February 13, 20093.32
January 30, 20093.61
January 15, 20093.53
December 31, 20083.71
December 15, 20084.42
November 28, 20084.66
November 14, 20085.21
October 31, 20085.93
October 15, 20087.19
September 30, 20088.76
September 15, 20089.05
August 29, 20089.14
August 15, 20089.51
July 31, 200810.41
July 15, 200812.61
June 30, 20086.36
June 13, 20086.08
May 30, 20085.99
May 15, 20085.86
April 30, 20085.58
April 15, 20085.67
March 31, 20085.76
March 14, 20085.83
February 29, 20086.04
February 15, 20086.11
January 31, 20085.85
January 15, 20084.1
December 31, 20074.4
December 11, 20075.41
November 27, 20076.02
November 9, 20076.47
October 26, 20076.69
October 10, 20076.33
September 25, 20076.36
September 11, 20076.58
August 10, 20076.58
July 10, 20076.16
June 12, 200710.89
May 10, 200710.77
April 10, 20079.1
March 12, 20078.55
February 12, 20077.74
January 9, 20077.02
December 12, 20067.34
November 10, 20067.81
October 10, 20068.21
September 12, 20069.34
August 10, 200610.03
July 11, 200610.65
June 12, 200611.02
May 10, 200610.1
April 10, 200610.14
March 10, 20069.32
February 10, 20068.42
January 10, 20067.79
December 12, 20057.42
November 10, 20057.65
October 11, 20058.62
September 12, 20058
August 10, 20058.75
July 12, 20058.11
June 10, 20058.06
May 10, 20057.62
April 12, 20056.74
March 10, 20057.07
February 10, 20056.47
January 11, 20055.49
December 10, 20045.62
November 10, 20045.72
October 12, 20045.98
September 10, 20045.97
August 10, 20045.95
July 12, 20046.38
June 9, 20046.58
May 11, 20046.85
April 12, 20046.51
March 10, 20046.24
February 10, 20045.98
January 12, 20045.51
December 10, 20036.11
November 11, 20036.61
October 10, 20037.46
September 10, 20037.59
August 12, 20035.98
July 10, 20036
June 10, 20035.71
May 12, 20035.34
April 10, 20035.22
March 11, 20036.71
February 11, 20036.67
January 10, 20035.83
December 10, 20025.9
November 12, 20025.92
October 10, 20025.72
September 10, 20026.49
August 12, 20026.51
July 10, 20026.49
June 11, 20026.29
May 10, 20026.16
April 10, 20027.22
March 12, 20027.65
February 12, 20028.17
January 10, 20028.02
December 11, 20017.26
November 12, 20017.24
October 10, 20017.28
September 5, 20017.22
August 10, 20016.33
July 10, 20017.09
June 12, 20017.19
May 10, 20016.81
April 9, 20016.14
March 12, 20015.99
February 12, 20016.52
January 9, 20015.53
December 12, 20005.31
November 10, 20005.09
October 10, 20005.01
September 12, 20004.48
August 10, 20004.47
July 11, 20003.51
June 12, 20003.51
May 10, 20003.29
April 11, 20002.09
March 10, 20000.73
February 10, 20001.14
January 11, 20000.89
December 10, 19990.23
November 10, 19990.09

Institutional Ownership History (%)

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

Date Institutional Ownership
June 30, 201519
March 31, 201516
December 31, 201421
September 30, 201418
June 30, 201418
March 31, 201417
December 31, 20135
September 30, 201313
June 30, 201314
March 31, 201328
December 31, 201249
September 30, 201253
June 30, 201262
March 31, 201243
December 31, 201131
September 30, 201149
June 30, 201123
March 31, 201143
December 31, 201010
September 30, 201012
June 30, 201013
March 31, 201054
December 31, 200924
September 30, 200923
June 30, 200929
March 31, 200938
December 31, 200842
September 30, 200849
June 30, 200856
March 31, 200846
December 31, 200749
September 30, 200744
June 30, 200745
March 31, 200747
December 31, 200646
September 30, 200645
June 30, 200646
March 31, 200642
December 31, 200543
September 30, 200545
June 30, 200540
March 31, 200536
December 31, 200433
September 30, 200439
June 30, 200440
March 31, 200429
December 31, 200327
September 30, 200321
June 30, 200327
March 31, 200317
December 31, 200218
September 30, 200218
June 30, 200219
March 31, 200229
December 31, 200131
September 30, 200123
June 30, 200150
March 31, 200117
December 31, 20006
September 30, 20007
June 30, 20002
March 31, 20002

Insider ownership (%)

This is the historical insider ownership of Plug Power 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.

Date Insider Ownership
July 31, 20152
June 30, 20152
May 31, 20152
April 30, 20152
March 31, 20152
February 28, 20152
January 31, 20152
December 31, 20141
November 30, 20142
October 31, 20142
September 30, 20142
August 31, 20142
July 31, 20142
June 30, 20141
May 31, 20142
March 31, 201411
February 28, 201411
January 31, 201411
December 31, 201311
November 30, 201311
October 31, 201311
September 30, 201311
August 31, 20139
July 31, 20139
June 30, 20139
May 31, 20138
April 30, 20138
March 31, 20138
January 31, 20136
November 30, 20126
October 31, 20126
September 30, 20126
April 30, 20112
March 31, 20112
February 28, 20112
January 31, 20112
December 31, 20102
November 30, 20102
October 31, 20102
September 30, 20102
August 31, 20102
July 31, 20102
June 30, 20101
May 31, 20101
April 30, 20101
March 31, 20101
February 28, 20101
January 31, 20101
December 31, 20091
November 30, 20091
October 31, 20091
September 30, 20091
August 31, 20091
July 31, 20091
June 30, 20091
May 31, 20091
April 30, 20091
March 31, 20091
February 28, 20091
January 31, 20091
December 31, 20081
November 30, 20081
October 31, 20081
September 30, 20081
August 31, 20081
July 31, 20081
June 30, 20081
May 31, 20081
April 30, 20081
March 31, 20081
February 29, 20081
January 31, 20081
December 31, 20071
November 30, 20071
October 31, 20071
September 30, 20071
August 31, 20071
July 31, 20071
June 30, 20071
May 31, 20071
April 30, 20071
March 31, 20071
February 28, 20071
January 31, 20071
December 31, 20061
November 30, 20061
October 31, 20061
September 30, 20061
June 30, 20061
May 31, 20061
April 30, 20061
March 31, 20061
February 28, 20061
January 31, 20061
December 31, 20051
November 30, 20051
October 31, 20051
September 30, 20051
August 31, 20051
July 31, 20051
June 30, 20051
May 31, 20051
April 30, 20051
March 31, 20051
February 28, 20051
January 31, 20051
December 31, 20041
November 30, 20041
October 31, 20041
September 30, 20041
August 31, 20041
July 31, 20041
June 30, 20041
May 31, 20041
April 30, 20041
March 31, 20041

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
Gerard L. Conway,JrGeneral Counsel467,6290.27%2014-07-29
George C. McnameeN/A282,5710.16%2015-07-17
Andrew MarshPresident & CEO270,4350.16%2015-08-27
Mr. Gary K. WillisN/A222,8180.13%2015-07-17
Mr. Larry G. GarberdingN/A163,782less than 0.1%2015-07-17
Maureen O. HelmerN/A153,955less than 0.1%2015-07-17
Gerard A. AndersonN/A132,229less than 0.1%2010-02-08
Mr. Adrian CorlessN/A103,729less than 0.1%2010-03-25
Mark A. SperryN/A87,802less than 0.1%2010-02-08
Tom HutchisonN/A78,000less than 0.1%2006-06-28

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value($1000)
Vanguard Group, Inc.   Premium Plus5,360,8702015-06-303.09N/A13,135
BlackRock Fund Advisors   Premium Plus4,501,8062015-06-302.60N/A11,029
Heights Capital Management Inc4,000,0002014-12-312.31N/A12,000
Vanguard Total Stock Mkt Idx2,909,3522015-07-311.68N/A7,535
State Street Corp   Premium Plus2,626,8752015-06-301.51N/A6,435
iShares Russell 2000 (AU)2,501,1942015-08-191.220.025,478
Northern Trust Investments, N.A.   Premium Plus1,618,6412015-06-300.93N/A3,966
Vanguard Extended Market Index Fund1,566,9342015-07-310.900.014,058
PowerShares WilderHill Clean Energy Port1,332,8362015-08-190.652.652,919
Invesco PowerShares Capital Mgmt LLC   Premium Plus1,311,0902015-03-310.76N/A3,396

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