| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | 31 May 2024 | 30 May 2024 | 001-08897 |
| 4 | Open Document | Open Filing | FORM 4 | 26 May 2023 | 24 May 2023 | 001-08897 |
| 4 | Open Document | Open Filing | FORM 4 | 27 May 2022 | 25 May 2022 | 001-08897 |
| 4 | Open Document | Open Filing | FORM 4 | 28 May 2021 | 26 May 2021 | 001-08897 |
| 4 | Open Document | Open Filing | FORM 4 | 09 Apr 2021 | 08 Apr 2021 | 001-08897 |
| 4 | Open Document | Open Filing | FORM 4 | 15 Jun 2020 | 11 Jun 2020 | 001-08897 |
| 4 | Open Document | Open Filing | FORM 4 | 04 Jun 2019 | 03 Jun 2019 | 001-08897 |
| 4 | Open Document | Open Filing | FORM 4 | 05 Jun 2018 | 04 Jun 2018 | 001-08897 |
| 4 | Open Document | Open Filing | FORM 4 | 01 Jun 2017 | 31 May 2017 | 001-08897 |
| 4 | Open Document | Open Filing | FORM 4 | 02 Jun 2016 | 01 Jun 2016 | 001-08897 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 May 2016 | 15 May 2016 | 001-16769 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 05 Apr 2016 | 01 Apr 2016 | 001-16769 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 06 Jan 2016 | 04 Jan 2016 | 001-16769 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 24 Jun 2015 | 22 Jun 2015 | 001-16769 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 Jun 2015 | 15 Jun 2015 | 001-16769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jun 2015 | 02 Jun 2015 | 001-08897 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 16 Mar 2015 | 12 Mar 2015 | 001-16769 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 05 Jan 2015 | 04 Jan 2015 | 001-16769 |
| 4 | Open Document | Open Filing | 2014-11-14 CHAMBERS FORM 4 | 18 Nov 2014 | 14 Nov 2014 | 001-16769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Jun 2014 | 03 Jun 2014 | 001-08897 |
| 4 | Open Document | Open Filing | 2014-05-15 CHAMBERS FORM 4 | 19 May 2014 | 15 May 2014 | 001-16769 |
| 4 | Open Document | Open Filing | 2014-04-02 CHAMBERS FORM 4 | 04 Apr 2014 | 02 Apr 2014 | 001-16769 |
| 4 | Open Document | Open Filing | 2014-01-04 CHAMBERS FORM 4 | 07 Jan 2014 | 04 Jan 2014 | 001-16769 |
| 4 | Open Document | Open Filing | 2013-12-12 CHAMBERS FORM 4 | 16 Dec 2013 | 12 Dec 2013 | 001-16769 |
| 4 | Open Document | Open Filing | 2013-11-15 CHAMBERS FORM 4 | 19 Nov 2013 | 15 Nov 2013 | 001-16769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Jun 2013 | 03 Jun 2013 | 001-08897 |
| 4 | Open Document | Open Filing | 2013-05-15 CHAMBERS FORM 4 | 16 May 2013 | 15 May 2013 | 001-16769 |
| 4 | Open Document | Open Filing | 2013-01-04 CHAMBERS FORM 4 | 08 Jan 2013 | 04 Jan 2013 | 001-16769 |
| 3 | Open Document | Open Filing | 2013-01-04 CHAMBERS FORM 3 | 08 Jan 2013 | 04 Jan 2013 | 001-16769 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 May 2012 | 25 May 2012 | 001-08897 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 May 2012 | 23 May 2012 | 001-08897 |