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| Form | Description | Date | Format |
|---|---|---|---|
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Aug 14, 2019 |     |
| SC 13G/A | Amendment to a previously filed SC 13G | Jun 11, 2019 | |
| SC 13G/A | Amendment to a previously filed SC 13G | Jun 10, 2019 | |
| SC 13G | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions | Jun 10, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | May 17, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Apr 29, 2019 | |
| 20-F | Registration of securities of foreign private issuers pursuant to section 12(b) or (g) | Apr 26, 2019 |   |
| 424B4 | Form of prospectus disclosing information facts events covered in both forms 424B1 424B3 | Apr 10, 2019 | |
| SC 13G/A | Amendment to a previously filed SC 13G | Apr 10, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Apr 10, 2019 | |
| EFFECT | Notice from the SEC of registration effectiveness | Apr 9, 2019 | |
| F-1/A | This filing is a pre-effective amendment to an F-1 filing | Apr 8, 2019 | |
| F-1 | Registration statement for certain foreign private issuers | Apr 3, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Mar 5, 2019 | |
| SC 13G | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions | Feb 14, 2019 | |
| SC 13G | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions | Feb 14, 2019 | |
| SC 13G | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions | Feb 13, 2019 | |
| SC 13G | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions | Feb 11, 2019 | |
| SC 13G | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions | Feb 1, 2019 | |
| SC 13G | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions | Jan 25, 2019 | |
| SC 13G/A | Amendment to a previously filed SC 13G | Dec 10, 2018 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Nov 13, 2018 | |
| S-8 | Securities offered to employees pursuant to employee benefit plans | Sep 14, 2018 | |