| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 20 Jun 2025 | 20 Jun 2025 | 001-14778 | |
| 4 | Open Document | Open Filing | 13 Dec 2024 | 12 Dec 2024 | 001-14778 | |
| 4 | Open Document | Open Filing | 15 Dec 2023 | 15 Dec 2023 | 001-14778 | |
| 4 | Open Document | Open Filing | 21 Nov 2022 | 17 Nov 2022 | 001-14778 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 24 Sep 2021 | 23 Sep 2021 | 001-14778 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 11 Feb 2021 | 09 Feb 2021 | 000-55039 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 18 Sep 2020 | 16 Sep 2020 | 001-14778 |
| 4 | Open Document | Open Filing | FORM 4 | 13 May 2020 | 03 May 2020 | 000-55039 |
| 4 | Open Document | Open Filing | 10 Sep 2019 | 06 Sep 2019 | 001-14778 | |
| 4 | Open Document | Open Filing | FORM 4 | 07 May 2019 | 03 May 2019 | 000-55039 |
| 4 | Open Document | Open Filing | FORM 4 | 05 Nov 2018 | 01 Nov 2018 | 000-55039 |
| 4 | Open Document | Open Filing | 28 Sep 2018 | 27 Sep 2018 | 001-14778 | |
| 4 | Open Document | Open Filing | FORM 4 | 29 May 2018 | 24 May 2018 | 000-55039 |
| 4 | Open Document | Open Filing | FORM 4 | 08 May 2018 | 04 May 2018 | 000-55039 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 12 Jun 2017 | 08 Jun 2017 | 001-14778 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 16 May 2017 | 12 May 2017 | 000-55039 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 20 Dec 2016 | 16 Dec 2016 | 001-14778 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 20 Jun 2016 | 16 Jun 2016 | 000-16929 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 06 May 2016 | 04 May 2016 | 000-55039 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 24 Jun 2015 | 30 Apr 2015 | 000-55039 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 19 Jun 2015 | 18 Jun 2015 | 000-16929 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 04 May 2015 | 30 Apr 2015 | 000-55039 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 20 Jun 2014 | 19 Jun 2014 | 000-16929 |
| 4 | Open Document | Open Filing | 4 | 07 May 2014 | 05 May 2014 | 000-55039 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 01 Oct 2013 | 27 Sep 2013 | 000-16929 |
| 4 | Open Document | Open Filing | 4 | 30 Jul 2013 | 26 Jul 2013 | 001-33993 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 25 Jul 2012 | 21 Jun 2012 | 000-16929 |
| 4 | Open Document | Open Filing | 4 | 09 May 2012 | 07 May 2012 | 001-33993 |