| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 16 Jun 2023 | 14 Jun 2023 | 001-35535 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 Jun 2022 | 15 Jun 2022 | 001-35535 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 10 Dec 2021 | 08 Dec 2021 | 001-35535 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 29 Jun 2021 | 28 Jun 2021 | 001-35535 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 11 Jun 2021 | 09 Jun 2021 | 001-35535 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 17 Mar 2021 | 16 Mar 2021 | 001-35535 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 14 Sep 2020 | 10 Sep 2020 | 001-35535 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 11 Jun 2020 | 10 Jun 2020 | 001-35535 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 13 Sep 2019 | 12 Sep 2019 | 001-35535 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 14 Jun 2019 | 12 Jun 2019 | 001-35535 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 14 Jun 2018 | 12 Jun 2018 | 001-35535 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 09 Jun 2017 | 07 Jun 2017 | 001-35535 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 09 Jun 2016 | 08 Jun 2016 | 001-35535 |
| 4 | Open Document | Open Filing | ZEICHNER F4 | 12 Jun 2015 | 10 Jun 2015 | 001-35535 |
| 4 | Open Document | Open Filing | ZEICHNER F4 | 13 Jun 2014 | 11 Jun 2014 | 001-35535 |