| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 23 Apr 2025 | 21 Apr 2025 | 001-16497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Apr 2024 | 01 Apr 2023 | 001-16497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 29 Mar 2023 | 27 Mar 2023 | 001-16497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 04 Apr 2022 | 28 Mar 2022 | 001-16497 |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 Apr 2021 | 29 Mar 2021 | 001-16497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 31 Mar 2021 | 29 Mar 2021 | 001-16497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 20 Apr 2020 | 16 Apr 2020 | 001-16497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 28 Oct 2019 | 24 Sep 2019 | 001-16497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 19 Apr 2019 | 17 Apr 2019 | 001-16497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 18 Apr 2018 | 16 Apr 2018 | 001-16497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 19 Apr 2017 | 17 Apr 2017 | 001-16497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 19 Apr 2016 | 15 Apr 2016 | 001-16497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 20 Apr 2015 | 15 Apr 2015 | 001-16497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 16 Sep 2014 | 12 Sep 2014 | 001-16497 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 17 Apr 2014 | 15 Apr 2014 | 001-16497 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 20 Mar 2014 | 20 Feb 2014 | 001-16497 |