| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 28 Jan 2022 | 28 Jan 2022 | 001-13341 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 Jan 2022 | 05 Jan 2022 | 001-13341 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 11 Feb 2021 | 10 Feb 2021 | 001-13341 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 25 Sep 2018 | 21 Sep 2018 | 001-13341 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 19 Sep 2017 | 15 Sep 2017 | 001-13341 |
| 4/A | Open Document | Open Filing | FORM 4/A SUBMISSION | 05 May 2017 | 03 May 2017 | 000-30347 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 05 May 2017 | 03 May 2017 | 000-30347 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 02 May 2017 | 28 Apr 2017 | 000-30347 |
| 4/A | Open Document | Open Filing | FORM 4/A SUBMISSION | 27 Apr 2017 | 20 Apr 2017 | 000-30347 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 27 Apr 2017 | 25 Apr 2017 | 000-30347 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 24 Apr 2017 | 20 Apr 2017 | 000-30347 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 02 Mar 2017 | 28 Feb 2017 | 000-30347 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 21 Feb 2017 | 16 Feb 2017 | 001-13341 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 31 May 2016 | 31 May 2016 | 001-13341 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 21 Jan 2016 | 19 Jan 2016 | 000-30347 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Jan 2016 | 13 Jan 2016 | 001-13341 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 16 Dec 2015 | 14 Dec 2015 | 001-13341 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 18 Mar 2015 | 16 Mar 2015 | 000-27436 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 28 Jan 2015 | 26 Jan 2015 | 000-30347 |
| 3 | Open Document | Open Filing | FORM 3 | 12 Nov 2014 | 10 Nov 2014 | 000-27436 |
| 4 | Open Document | Open Filing | APRIL 2014 GIFT | 03 Apr 2014 | 02 Apr 2014 | 000-30347 |
| 4 | Open Document | Open Filing | 2014 ANNUAL GRANT | 28 Jan 2014 | 27 Jan 2014 | 000-30347 |