| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 Jan 2022 | 03 Jan 2022 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 24 Mar 2021 | 22 Mar 2021 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Jan 2021 | 06 Jan 2021 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 23 Sep 2020 | 22 Sep 2020 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 11 Dec 2019 | 09 Dec 2019 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 15 Oct 2019 | 11 Oct 2019 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 15 Jul 2019 | 12 Jul 2019 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 19 Jun 2019 | 18 Jun 2019 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 27 Dec 2018 | 24 Dec 2018 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 13 Dec 2018 | 12 Dec 2018 | 001-38175 |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | 09 Jan 2018 | 04 Jan 2018 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Jan 2018 | 04 Jan 2018 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 18 Apr 2017 | 14 Apr 2017 | 000-55107 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 23 May 2016 | 19 May 2016 | 000-55107 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 01 Dec 2015 | 20 Nov 2015 | 000-55107 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Jun 2015 | 08 Jun 2015 | 000-55107 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 12 Dec 2014 | 11 Dec 2014 | 000-55107 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 18 Sep 2014 | 16 Sep 2014 | 000-55107 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 Sep 2014 | 04 Sep 2014 | 000-55107 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 09 Jun 2014 | 05 Jun 2014 | 000-55107 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 09 Jun 2014 | 05 Jun 2014 | 000-55107 |