| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 12, 2022 | Apr 6, 2022 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 11, 2020 | Jan 27, 2020 | 001-13395 |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 11, 2020 | Jan 22, 2020 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 27, 2020 | Jan 22, 2020 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 17, 2019 | Jan 4, 2019 | 001-13395 |
| 4 | Open Document | Open Filing | FORM 4 | Jul 9, 2018 | Jul 3, 2018 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 8, 2018 | Jun 5, 2018 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 7, 2018 | Mar 6, 2018 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Oct 10, 2017 | Oct 6, 2017 | 001-13395 |
| 4 | Open Document | Open Filing | FORM 4 | May 17, 2017 | May 11, 2017 | 001-13395 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 18, 2017 | Apr 17, 2017 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Dec 5, 2016 | Dec 2, 2016 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 6, 2016 | May 6, 2016 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 1, 2016 | Jan 28, 2016 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Oct 6, 2015 | Oct 1, 2015 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 18, 2015 | May 15, 2015 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Oct 24, 2014 | Oct 17, 2014 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 16, 2014 | Sep 16, 2014 | 001-13395 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 15, 2014 | Sep 15, 2014 | 001-13395 |