| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 21 Sep 2021 | 20 Sep 2021 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 16 Aug 2021 | 12 Aug 2021 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 15 Jul 2021 | 14 Jul 2021 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 28 Dec 2020 | 22 Dec 2020 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 18 Sep 2020 | 16 Sep 2020 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Sep 2020 | 31 Aug 2020 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Jul 2020 | 08 Jul 2020 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Jun 2020 | 29 May 2020 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 29 May 2020 | 27 May 2020 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 May 2020 | 01 May 2020 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 27 Apr 2020 | 23 Apr 2020 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 Feb 2020 | 04 Feb 2020 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 13 Mar 2019 | 11 Mar 2019 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Mar 2019 | 06 Mar 2019 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 27 Feb 2019 | 26 Feb 2019 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Jan 2019 | 04 Jan 2019 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 23 Jul 2018 | 19 Jul 2018 | 001-38175 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 09 Jan 2018 | 05 Jan 2018 | 001-38175 |
| 5 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Jun 2017 | 30 Apr 2017 | 000-55107 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 16 May 2017 | 13 May 2017 | 000-55107 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 27 Jun 2016 | 23 Jun 2016 | 000-55107 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Jun 2015 | 08 Jun 2015 | 000-55107 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 24 Apr 2014 | 22 Apr 2014 | 000-55107 |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 17 Mar 2014 | 06 Mar 2014 | 000-55107 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 10 Mar 2014 | 06 Mar 2014 | 000-55107 |