| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 26 Apr 2024 | 24 Apr 2024 | 000-21039 | |
| 4 | Open Document | Open Filing | 28 Apr 2023 | 26 Apr 2023 | 000-21039 | |
| 4 | Open Document | Open Filing | 29 Apr 2022 | 27 Apr 2022 | 000-21039 | |
| 4 | Open Document | Open Filing | FORM 4 | 24 May 2021 | 20 May 2021 | 001-08940 |
| 4 | Open Document | Open Filing | FORM 4 - | 29 Apr 2021 | 27 Apr 2021 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | 14 Dec 2020 | 10 Dec 2020 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | 18 May 2020 | 14 May 2020 | 001-08940 |
| 4 | Open Document | Open Filing | FORM 4 - | 15 May 2020 | 13 May 2020 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | 29 Apr 2020 | 28 Apr 2020 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | 14 Jun 2019 | 12 Jun 2019 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | 20 May 2019 | 16 May 2019 | 001-08940 |
| 4 | Open Document | Open Filing | FORM 4 - | 02 May 2019 | 30 Apr 2019 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | 15 Jun 2018 | 08 Jun 2018 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | 21 May 2018 | 17 May 2018 | 001-08940 |
| 4 | Open Document | Open Filing | FORM 4 - | 03 May 2018 | 01 May 2018 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | 22 May 2017 | 18 May 2017 | 001-08940 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 04 May 2017 | 02 May 2017 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | 23 May 2016 | 19 May 2016 | 001-08940 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 05 May 2016 | 03 May 2016 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | 22 May 2015 | 20 May 2015 | 001-08940 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 07 May 2015 | 05 May 2015 | 000-21039 |
| 4 | Open Document | Open Filing | FORM 4 - | 16 May 2014 | 14 May 2014 | 001-08940 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 May 2014 | 06 May 2014 | 000-21039 |