| 3 | Initial statement of beneficial ownership of securities | January 15, 2019 | |
| 3 | Initial statement of beneficial ownership of securities | January 10, 2019 | |
| SC 13D | General statement of acquisition of beneficial ownership | January 10, 2019 | |
| 3 | Initial statement of beneficial ownership of securities | January 10, 2019 | |
| 3 | Initial statement of beneficial ownership of securities | January 9, 2019 | |
| 10-12G | Registration of securities [Section 12(g)] | January 9, 2019 | |