| 4 | Statement of changes in beneficial ownership of securities | Aug 16, 2019 |    |
| 4 | Statement of changes in beneficial ownership of securities | Jun 6, 2019 | |
| 4 | Statement of changes in beneficial ownership of securities | Jun 6, 2019 | |
| 4 | Statement of changes in beneficial ownership of securities | Jun 6, 2019 | |
| 4 | Statement of changes in beneficial ownership of securities | Jun 6, 2019 | |
| 4 | Statement of changes in beneficial ownership of securities | Jun 6, 2019 | |
| 4 | Statement of changes in beneficial ownership of securities | Jun 6, 2019 | |
| 4 | Statement of changes in beneficial ownership of securities | Jun 6, 2019 | |
| 4 | Statement of changes in beneficial ownership of securities | May 13, 2019 | |
| 4 | Statement of changes in beneficial ownership of securities | Mar 28, 2019 | |
| 4 | Statement of changes in beneficial ownership of securities | Mar 12, 2019 | |
| 4 | Statement of changes in beneficial ownership of securities | Mar 12, 2019 | |
| 4 | Statement of changes in beneficial ownership of securities | Mar 12, 2019 | |
| 4 | Statement of changes in beneficial ownership of securities | Mar 11, 2019 | |
| 4 | Statement of changes in beneficial ownership of securities | Dec 28, 2018 | |
| 4 | Statement of changes in beneficial ownership of securities | Dec 26, 2018 | |
| 4 | Statement of changes in beneficial ownership of securities | Dec 12, 2018 | |
| 4 | Statement of changes in beneficial ownership of securities | Nov 28, 2018 | |
