| Date | Filer | Title | Filing | Type | Shares Traded | Price | Total Held |
|---|---|---|---|---|---|---|---|
| May 24, 2005 | Director | Form 4 | Open market or private purchase of non-derivative or derivative security | 20,000 | $0.42 | 148,346 | |
| June 15, 2020 | Controller | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 25,000 | -- | 149,557 | |
| June 15, 2020 | Controller | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 80,000 | -- | 149,557 | |
| March 19, 2021 | Director | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 40,000 | -- | 151,357 | |
| March 19, 2021 | Director | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 40,000 | -- | 151,357 | |
| February 2, 2016 | Chief Scientific Officer | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 40,000 | -- | 152,500 | |
| August 10, 2009 | Director | Form 4 | Open market or private purchase of non-derivative or derivative security | 15,000 | $3.71 | 152,562 | |
| March 15, 2006 | EVP-COO, CFO | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 33,000 | -- | 156,334 | |
| December 5, 2012 | Director | Form 4 | Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 | 34,583 | $3.25 | 156,625 | |
| February 25, 2011 | Director | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 50,000 | $2.49 | 157,009 | |
| September 6, 2016 | Director | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 22,664 | -- | 158,215 | |
| March 20, 2013 | Director | Form 4 | Open market or private purchase of non-derivative or derivative security | 3,750 | $1.06 | 160,375 | |
| May 26, 2011 | CEO | Form 4 | Open market or private purchase of non-derivative or derivative security | 17,271 | $2.77 | 161,016 | |
| December 22, 2009 | Director | Form 4 | Open market or private purchase of non-derivative or derivative security | 10,000 | $3.00 | 162,562 | |
| December 5, 2011 | CEO | Form 4 | Open market or private purchase of non-derivative or derivative security | 2,972 | $2.16 | 163,988 | |
| December 5, 2011 | CEO | Form 4 | Open market or private purchase of non-derivative or derivative security | 200 | $2.20 | 164,188 | |
| May 10, 2013 | Director | Form 4 | Open market or private purchase of non-derivative or derivative security | 5,000 | $0.92 | 165,375 | |
| December 5, 2011 | CEO | Form 4 | Open market or private purchase of non-derivative or derivative security | 1,828 | $2.21 | 166,016 | |
| June 20, 2014 | CFO | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 60,000 | -- | 166,664 | |
| February 19, 2010 | Director | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 35,000 | $2.94 | 169,911 | |
| February 22, 2012 | Director | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 25,000 | -- | 170,000 | |
| February 25, 2011 | CFO | Form 4 | Grant, award or other acquisition pursuant to Rule 16b-3(d) | 70,000 | $2.49 | 170,000 | |
| May 13, 2013 | Director | Form 4 | Open market or private purchase of non-derivative or derivative security | 5,000 | $0.96 | 170,375 | |
| May 21, 2013 | Director | Form 4 | Open market or private purchase of non-derivative or derivative security | 5,000 | $0.93 | 175,375 | |
| May 21, 2013 | Director | Form 4 | Open market or private purchase of non-derivative or derivative security | 5,000 | $0.93 | 175,375 |
For recent transactions, including derivative transactions, see our Section 16 SEC filings page.
* Represents the number of non-derivative securities directly held. (I) Indicates that some (or all) of these shares are held indirectly.
