Switch to:

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
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, 20085.94
October 15, 20087.2
September 30, 20088.77
September 15, 20089.05
August 29, 20089.14
August 15, 20089.51
July 31, 200810.39
July 15, 200812.6
June 30, 20086.35
June 13, 20086.08
May 30, 20085.99
May 15, 20085.86
April 30, 20085.58
April 15, 20085.68
March 31, 20085.77
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, 20077.76
January 9, 20077.04
December 12, 20067.34
November 10, 20067.81
October 10, 20068.22
September 12, 20069.34
August 10, 200610.03
July 11, 200610.71
June 12, 200611.02
May 10, 200610.1
April 10, 200610.14
March 10, 20069.32
February 10, 20068.42
January 10, 20067.8
December 12, 20057.42
November 10, 20057.65
October 11, 200510.04
September 12, 20058
August 10, 20058.75
July 12, 20058.11
June 10, 20058.06
May 10, 20057.62
April 12, 20056.8
March 10, 20057.07
February 10, 20056.47
January 11, 20055.49
December 10, 20045.62
November 10, 20045.72
October 12, 20045.99
September 10, 20045.97
August 10, 20045.95
July 12, 20046.38
June 9, 20046.58
May 11, 20046.85
April 12, 20046.52
March 10, 20046.24
February 10, 20047.14
January 12, 20046.58
December 10, 20036.11
November 11, 20036.61
October 10, 20037.46
September 10, 20037.59
August 12, 20035.98
July 10, 20036.09
June 10, 20035.71
May 12, 20035.34
April 10, 20036.25
March 11, 20036.73
February 11, 20036.68
January 10, 20035.84
December 10, 20025.9
November 12, 20025.92
October 10, 20025.73
September 10, 20026.49
August 12, 20026.51
July 10, 20026.53
June 11, 20026.29
May 10, 20026.16
April 10, 20027.21
March 12, 20027.68
February 12, 20028.21
January 10, 20028.05
December 11, 20017.26
November 12, 20017.24
October 10, 20017.29
September 5, 20017.22
August 10, 20016.33
July 10, 20017.18
June 12, 20017.19
May 10, 20016.81
April 9, 20016.14
March 12, 20016.01
February 12, 20016.53
January 9, 20015.55
December 12, 20005.31
November 10, 20005.09
October 10, 20005.03
September 12, 20004.48
August 10, 20004.47
July 11, 20003.54
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
February 28, 201521
January 31, 201521
December 31, 201423
November 30, 201426
October 31, 201427
September 30, 201429
August 31, 201429
July 31, 201427
June 30, 201418
May 31, 201418
April 30, 201421
March 31, 201416
February 28, 201420
January 31, 201418
December 31, 201316
November 30, 201314
October 31, 201318
September 30, 201318
August 31, 201325
July 31, 201327
June 30, 201334
May 31, 201331
April 30, 201336
March 31, 201341
February 28, 201370
January 31, 201388
December 31, 201261
November 30, 201261
October 31, 201261
September 30, 201249
August 31, 201260
July 31, 201261
June 30, 201254
May 31, 201254
April 30, 201254
March 31, 201244
February 29, 201247
January 31, 201253
December 31, 201151
November 30, 201151
October 31, 201151
September 30, 201149
August 31, 201148
July 31, 201148
April 30, 201144
March 31, 201144
February 28, 201145
January 31, 201146
December 31, 201046
November 30, 201046
October 31, 201048
September 30, 201049
August 31, 201051
July 31, 201054
June 30, 201056
May 31, 201022
April 30, 201025
March 31, 201026
February 28, 201026
January 31, 201028
December 31, 200928
November 30, 200929
October 31, 200933
September 30, 200929
August 31, 200929
July 31, 200929
June 30, 200931
May 31, 200930
April 30, 200931
March 31, 200932
February 28, 200946
January 31, 200952
December 31, 200852
November 30, 200856
October 31, 200860
September 30, 200848
August 31, 200848
July 31, 200848
June 30, 200855
May 31, 200855
April 30, 200855
March 31, 200846
February 29, 200846
January 31, 200846

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
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/A268,8550.16%2015-01-02
Andrew MarshPresident & CEO243,5530.14%2013-08-20
Mr. Gary K. WillisN/A218,6230.13%2015-01-02
Mr. Larry G. GarberdingN/A157,101less than 0.1%2015-01-02
Maureen O. HelmerN/A147,788less than 0.1%2015-01-02
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
Vanguard Group, Inc.4,685,4452014-12-312.710.0014,057,000
BlackRock Fund Advisors4,099,2932014-12-312.370.0012,298,000
Heights Capital Management Inc4,000,0002014-12-312.310.0012,000,000
Vanguard Total Stock Mkt Idx2,674,3082015-01-311.540.007,140,402
iShares Russell 2000 (AU)2,631,6402015-03-021.540.038,237,033
State Street Corp2,486,0542014-12-311.440.007,459,000
Friends Prov Pioneer Global Ecology Lf1,979,3882014-12-311.140.465,938,180
Friends Provident Life and Pensions Ltd.1,979,3882014-12-311.140.465,938,180
Raging Capital Management LLC1,675,6002014-12-310.970.535,027,000
Northern Trust Investments, N.A.1,646,1302014-12-310.950.004,939,000

Add Notes, Comments

If you want to ask a question, or report a bug, please create a support ticket.

User Comments

No comment yet

Get WordPress Plugins for easy affiliate links on Stock Tickers and Guru Names | Earn affiliate commissions by embedding GuruFocus Charts
GuruFocus Affiliate Program: Earn up to $400 per referral. ( Learn More)
Free 7-day Trial
FEEDBACK