| SILVA ROBERT V President | Sale at price 0.03 per share. | Direct | 840 | Feb 19, 2003 |
| SILVA ROBERT V President | Stock Award(Grant) at price 0.06 per share. | Direct | 1,271 | Sep 16, 2002 |
| SILVA ROBERT V President | Stock Award(Grant) at price 0.00 per share. | Direct | 0 | Mar 29, 2001 |
| HOLDSWORTH ARTHUR C III Officer and Director | Stock Award(Grant) at price 0.00 per share. | Direct | 0 | Mar 29, 2001 |
| SILVA ROBERT V President | Purchase at price 0.10 per share. | Direct | 165 | Nov 10, 1999 |
| SILVA ROBERT V President | Purchase at price 0.10 per share. | Direct | 165 | Nov 10, 1999 |
| MAYER ANDREW J JR Chief Financial Officer | Purchase at price 0.13 per share. | Direct | 112 | Dec 31, 1998 |
| SILVA ROBERT V President | Stock Award(Grant) at price 0.75 per share. | Direct | 37,500 | Jun 30, 1998 |
| TKACH MARK E Officer | Stock Award(Grant) at price 4.00 per share. | Direct | 40,000 | Jun 30, 1998 |
| HOLDSWORTH ARTHUR C III Director | Stock Award(Grant) at price 0.40 per share. | Direct | 1,280 | Dec 30, 1997 |
| SILVA ROBERT V President | Purchase at price 0.20 - 0.25 per share. | Direct | 5,025 | Dec 18, 1997 |
| SILVA ROBERT V President | Purchase at price 0.20 - 0.25 per share. | Direct | 4,900 | Dec 18, 1997 |
| HOLDSWORTH ARTHUR C III Director | Sale at price 0.03 per share. | Indirect | 150 | Dec 27, 1995 |
| HOLDSWORTH ARTHUR C III Director | Sale at price 0.03 per share. | Indirect | 150 | Dec 27, 1995 |
| MAYER ANDREW J JR Officer and Director | Stock Award(Grant) at price 0.44 per share. | Direct | 2,200 | Mar 12, 1993 |
| HOLDSWORTH ARTHUR C III Director | Purchase at price 1.13 per share. | Indirect | 5,650 | Aug 15, 1991 |
| MAHAN INGRID T Beneficial Owner of more than 10% of a Class of Security | Sale at price 5.75 per share. | Indirect | 3,416,638 | Jun 29, 1989 |
| TRAPP CHARLES F Unknown | Sale at price 6.75 - 6.88 per share. | Indirect | 196,025 | Apr 8, 1988 |
| MCMULLIN CHARLES J President | Sale at price 7.00 per share. | Indirect | 21,000 | Mar 24, 1988 |
| SONNEMANN ROGER C Affiliated Person | Conversion of Exercise of derivative security at price 3.13 per share. | Direct | 46,950 | Feb 8, 1988 |
| SONNEMANN ROGER C Director | Conversion of Exercise of derivative security at price 3.13 per share. | Direct | 31,300 | Jun 3, 1987 |
| MCMULLIN CHARLES J Officer and Director | Conversion of Exercise of derivative security at price 1.83 - 2.92 per share. | Direct | 115,050 | May 8, 1987 |
| TRAPP CHARLES F Officer and Director | Purchase at price 10.50 per share. | Indirect | 2,489,424 | May 8, 1987 |
| MAHAN INGRID T Beneficial Owner of more than 10% of a Class of Security | Conversion of Exercise of derivative security at price 2.02 per share. | Indirect | 30,300 | Jul 28, 1986 |
| MOORE JOHN W JR Officer | Sale at price 7.13 per share. | Indirect | 106,066 | Jun 16, 1986 |