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Form 4 Filings | Insider Buys | Significant Buys |
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"Insiders might sell their shares for any number of reasons, but they buy them for only one:
they think the price will rise" - Peter Lynch ==>> What is insider trading>> |

| Transaction & Date | Reported Date |
Company | Symbol | Insider Relationship |
Shares Traded | Average Price | Total Amount |
Shares Ownership |
Filing |
| 2008-02-13 Sale |
2008-02-13 5:30 pm | ROFIN SINAR TECHNOLOGIES INC | RSTI | WILLIS GARY K (Director) | 7,000 | $41.63 | $291,422 | 30,000 (Direct) | View |
| 2008-02-12 Sale |
2008-02-12 5:30 pm | ROFIN SINAR TECHNOLOGIES INC | RSTI | WILLIS GARY K (Director) | 9,000 | $40.45 | $364,050 | 37,000 (Direct) |
View |
| 2007-03-07 Purchase |
2007-03-09 1:10 pm |
VION PHARMACEUTICALS INC | VION | WILLIS GARY K (Director) | 50,000 | $1.52 | $76,000 | 74,235 (Direct) |
View |
| 2003-12-04 Purchase |
2003-12-05 09:05 am | PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 10,000 | $6.148 | $61,484 | 10,000 (Direct) |
View |
| Transaction & Date |
Reported Date | Company | Symbol | Insider Relationship |
Shares Traded |
Average Price |
Total Amount | Shares Ownership |
Filing |
| 2006-01-27 Sale |
2006-01-27 4:26 pm | BENTHOS INC | BTHS | WILLIS GARY K (Director) | 40,500 | $17.5 | $708,750 | 0 (Direct) | View |
| Transaction & Date | Reported Date | Company | Symbol | Insider Relationship |
Shares Traded |
Average Price | Total Amount |
Shares Ownership | Filing |
| 2008-10-02 Option Award | 2008-10-06 1:58 pm | PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 5,409 | $0 | $0 | 38,039 (Direct) |
View |
| 2008-10-01 Option Award | 2008-10-02 11:50 am | ROFIN SINAR TECHNOLOGIES INC | RSTI | WILLIS GARY K (Director) | 3,000 | $0 | $0 | 33,000 (Direct) |
View |
| 2008-07-02 Option Award | 2008-07-03 11:02 am | PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 2,195 | $0 | $0 | 32,630 (Direct) |
View |
| 2008-05-21 Option Award |
2008-05-22 4:45 pm | PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 3,500 | $3.3 | $11,550 | 30,435 (Direct) |
View |
| 2008-04-03 Option Award |
2008-04-07 2:36 pm |
PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 1,553 | $0 | $0 | 26,935 (Direct) |
View |
| 2008-01-03 Option Award |
2008-01-07 4:46 pm |
PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 1,238 | $0 | $0 | 25,382 (Direct) |
View |
| 2007-10-04 Option Award | 2007-10-05 1:15 pm | PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 1,623 | $0 | $0 | 24,144 (Direct) |
View |
| 2007-10-01 Option Award |
2007-10-02 10:24 am | ROFIN SINAR TECHNOLOGIES INC | RSTI | WILLIS GARY K (Director) | 1,500 | $0 | $0 | 23,000 (Direct) | View |
| 2007-07-02 Option Award |
2007-07-05 1:56 pm | PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 1,572 | $0 | $0 | 22,521 (Direct) | View |
| 2007-06-27 Option Award | 2007-06-28 7:54 pm |
VION PHARMACEUTICALS INC | VION | WILLIS GARY K (Director) | 11,300 | $0 | $0 | 85,535 (Direct) | View |
| 2007-04-03 Option Award |
2007-04-16 09:53 am | PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 1,582 | $0 | $0 | 20,949 (Direct) |
View |
| 2007-03-16 Option Award |
2007-03-20 2:43 pm |
ROFIN SINAR TECHNOLOGIES INC | RSTI | WILLIS GARY K (Director) | 1,500 | $57.05 | $85,575 | 21,500 (Direct) | View |
| 2007-01-08 Option Award | 2007-01-11 5:27 pm | PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 1,333 | $0 | $0 | 19,367 (Direct) | View |
| 2006-10-02 Option Award | 2006-10-04 2:31 pm | PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 1,266 | $0 | $0 | 18,034 (Direct) | View |
| 2006-06-28 Option Award | 2006-06-28 3:47 pm |
VION PHARMACEUTICALS INC | VION | WILLIS GARY K (Director) | 11,300 | $0 | $0 | 24,235 (Direct) | View |
| 2006-01-27 Exercise |
2006-01-27 4:26 pm | BENTHOS INC | BTHS | WILLIS GARY K (Director) | 25,500 | $9.985 | $254,610 | 40,500 (Direct) |
View |
| 2005-11-16 Option Award |
2005-11-18 4:07 pm | VION PHARMACEUTICALS INC | VION | WILLIS GARY K (Director) | 12,935 | $0 | $0 | 12,935 (Direct) |
View |
| 2005-06-01 Option Award | 2005-06-03 3:23 pm | PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 3,215 | $6.22 | $19,997 | 16,768 (Direct) |
View |
| 2004-10-01 Option Award | 2004-10-04 10:10 am |
ROFIN SINAR TECHNOLOGIES INC | RSTI | WILLIS GARY K (Director) | 1,500 | $0 | $0 | 18,500 (Direct) |
View |
| 2004-05-20 Option Award | 2004-05-24 3:39 pm | PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 2,000 | $7.5 | $15,000 | 13,553 (Direct) | View |
| 2003-12-19 Option Award | 2003-12-23 12:15 pm |
PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 1,553 | $0 | $0 | 11,553 (Direct) |
View |
| 2003-10-02 Option Award | 2003-10-03 10:34 am |
ROFIN SINAR TECHNOLOGIES INC | RSTI | WILLIS GARY K (Director) | 1,500 | $0 | $0 | 15,500 (Direct) |
View |
| Transaction & Date | Reported Date | Exercisable Expiration | Company | Symbol | Insider Relationship | Shares Traded | Conversion Price |
Shares Ownership |
Filing |
| 2008-05-21 Option Award |
2008-05-22 4:45 pm | N/A 2018-05-21 |
PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 12,000 | $3.21 | 152,685 (Direct) |
View |
| 2007-05-17 Option Award | 2007-10-03 10:52 am | 2008-05-17 2017-05-17 |
PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 12,000 | $2.98 | 140,685 (Direct) |
View |
| 2006-06-28 Option Award |
2006-06-30 4:01 pm |
2007-06-28 2016-06-28 |
PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 12,000 | $4.64 | 128,685 (Direct) |
View |
| 2006-01-27 Exercise | 2006-01-27 4:26 pm |
2005-03-08 2014-03-08 | BENTHOS INC | BTHS | WILLIS GARY K (Director) | 1,500 | $5.48 | 0 (Direct) | View |
| 2006-01-27 Exercise | 2006-01-27 4:26 pm |
1999-01-22 2008-01-22 | BENTHOS INC | BTHS | WILLIS GARY K (Director) | 15,000 | $14.25 | 0 (Direct) | View |
| 2006-01-27 Exercise |
2006-01-27 4:26 pm | 2003-01-25 2012-01-25 |
BENTHOS INC | BTHS | WILLIS GARY K (Director) | 7,500 | $3.78 | 0 (Direct) | View |
| 2006-01-27 Exercise | 2006-01-27 4:26 pm | 2004-01-23 2013-01-23 |
BENTHOS INC | BTHS | WILLIS GARY K (Director) | 1,500 | $2.86 | 0 (Direct) |
View |
| 2005-06-08 Option Award | 2005-06-09 8:05 pm |
2006-06-08 2015-06-08 |
VION PHARMACEUTICALS INC | VION | WILLIS GARY K (Director) | 20,000 | $2.09 | 20,000 (Direct) | View |
| 2005-06-01 Option Award |
2005-06-03 3:23 pm | 2006-06-01 2015-06-01 |
PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 12,000 | $6.22 | 116,685 (Direct) |
View |
| 2004-05-20 Option Award | 2004-05-24 3:39 pm | 2005-05-20 2014-05-20 |
PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 12,000 | $7.5 | 104,685 (Direct) | View |
| 2004-03-08 Option Award | 2004-03-08 5:23 pm | 2005-03-08 2014-03-08 | BENTHOS INC | BTHS | WILLIS GARY K (Director) | 1,500 | $5.48 | 1,500 (Direct) | View |
| 2003-05-22 Option Award | 2003-12-05 09:05 am |
N/A 2013-05-22 | PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 10,000 | $5.02 | 10,000 (Direct) | View |
| 2003-03-25 Option Award |
2003-12-05 09:05 am | N/A 2010-06-07 | PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 13,288 | $96.33 | 13,288 (Direct) |
View |
| 2003-03-25 Option Award | 2003-12-05 09:05 am |
N/A 2012-10-16 |
PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 1,245 | $3.67 | 1,245 (Direct) | View |
| 2003-03-25 Option Award | 2003-12-05 09:05 am | N/A 2013-03-25 |
PLUG POWER INC | PLUG | WILLIS GARY K (Director) | 15,000 | $5.29 | 15,000 (Direct) | View |
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