| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 08 Jun 2022 | 07 Jun 2022 | 000-21467 | |
| 4 | Open Document | Open Filing | 05 Apr 2022 | 01 Apr 2022 | 000-21467 | |
| 4 | Open Document | Open Filing | 01 Apr 2022 | 30 Mar 2022 | 000-21467 | |
| 4 | Open Document | Open Filing | 16 Nov 2021 | 12 Nov 2021 | 000-21467 | |
| 4 | Open Document | Open Filing | 03 Jun 2021 | 02 Jun 2021 | 000-21467 | |
| 4 | Open Document | Open Filing | 05 Apr 2021 | 01 Apr 2021 | 000-21467 | |
| 4 | Open Document | Open Filing | 25 Mar 2021 | 23 Mar 2021 | 000-21467 | |
| 4 | Open Document | Open Filing | 03 Dec 2020 | 01 Dec 2020 | 000-21467 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 01 Dec 2020 | 01 Dec 2020 | 000-21467 |
| 4 | Open Document | Open Filing | OWNERSHIPDOCUMENT | 20 Aug 2020 | 18 Aug 2020 | 000-21467 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 28 Jul 2020 | 13 Jul 2020 | 000-21467 |
| 4 | Open Document | Open Filing | 03 Apr 2020 | 01 Apr 2020 | 000-21467 | |
| 4 | Open Document | Open Filing | FORM 4 | 24 Apr 2019 | 22 Apr 2019 | 000-21467 |
| 4 | Open Document | Open Filing | FORM 4 | 03 Apr 2019 | 01 Apr 2019 | 000-21467 |
| 4 | Open Document | Open Filing | 4 | 18 Jun 2018 | 14 Jun 2018 | 000-21467 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Apr 2018 | 01 Apr 2018 | 000-21467 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 04 Apr 2017 | 01 Apr 2017 | 000-21467 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 17 Mar 2017 | 15 Mar 2017 | 000-21467 |
| 4 | Open Document | Open Filing | FORM 4 | 14 Dec 2016 | 13 Dec 2016 | 000-21467 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 17 Jun 2016 | 16 Jun 2016 | 000-21467 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 09 Jun 2016 | 09 Jun 2016 | 000-21467 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 Apr 2016 | 01 Apr 2016 | 000-21467 |
| 4 | Open Document | Open Filing | FORM 4 | 18 Nov 2015 | 17 Nov 2015 | 000-21467 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 21 Aug 2015 | 20 Aug 2015 | 000-21467 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Apr 2015 | 01 Apr 2015 | 000-21467 |
| 4 | Open Document | Open Filing | FORM 4 | 19 Mar 2015 | 17 Mar 2015 | 000-21467 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 20 Jun 2014 | 18 Jun 2014 | 000-21467 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Apr 2014 | 01 Apr 2014 | 000-21467 |
| 4 | Open Document | Open Filing | FORM 4 | 20 Nov 2013 | 20 Nov 2013 | 000-21467 |
| 4 | Open Document | Open Filing | FORM 4 | 26 Jun 2013 | 24 Jun 2013 | 000-21467 |
| 4 | Open Document | Open Filing | FORM 4 | 02 Apr 2013 | 01 Apr 2013 | 000-21467 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 22 Mar 2013 | 01 Mar 2013 | 000-21467 |
| 4/A | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Apr 2012 | 01 Aug 2011 | 000-21467 |
| 4 | Open Document | Open Filing | FORM 4 | 01 Mar 2012 | 01 Mar 2012 | 000-21467 |