| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 27 May 2025 | 22 May 2025 | 000-27688 |
| 4 | Open Document | Open Filing | 14 Apr 2025 | 10 Apr 2025 | 000-27688 | |
| 4 | Open Document | Open Filing | 12 Jun 2023 | 17 Apr 2023 | 000-27688 | |
| 4 | Open Document | Open Filing | 11 Mar 2022 | 07 Mar 2022 | 000-27688 | |
| 4 | Open Document | Open Filing | 10 May 2021 | 10 May 2021 | 000-27688 | |
| 4 | Open Document | Open Filing | 27 May 2020 | 29 Apr 2020 | 000-27688 | |
| 4 | Open Document | Open Filing | 17 May 2019 | 15 May 2019 | 000-27688 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 Oct 2016 | 03 Oct 2016 | 000-27688 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Oct 2016 | 29 Sep 2016 | 000-27688 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 26 May 2016 | 25 May 2016 | 000-27688 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 07 May 2015 | 05 May 2015 | 000-27688 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 23 Apr 2015 | 23 Apr 2015 | 000-27688 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Apr 2014 | 10 Apr 2014 | 000-27688 |