| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 26 Aug 2022 | 22 Aug 2022 | 001-11476 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 20 Jan 2022 | 18 Jan 2022 | 001-11476 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 24 May 2021 | 14 May 2021 | 001-11476 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 24 May 2019 | 20 May 2019 | 001-11476 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Dec 2016 | 13 Dec 2016 | 001-11476 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Jul 2015 | 07 Jul 2015 | 001-11476 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 Jul 2014 | 24 Jul 2014 | 001-11476 |