| Filed On | Filing |
|---|---|
| 22 Sep 2023 | 13G |
| 17 Jun 2021 | SC 13G |
| 21 May 2020 | SC 13G |
| 30 Apr 2020 | SC 13G |
| 20 Apr 2020 | SABBY 13G CHEK 4.20.20 |
| 05 Feb 2020 | CHEK 13G |
| 15 Feb 2019 | SC 13G |
| 13 Feb 2019 | SC 13G |
| 12 Feb 2019 | SCHEDULE 13G |
| 30 Nov 2017 | SC 13G |
| 01 Jun 2017 | SABBY 13G CHEK 6.01.17 |
| 17 Mar 2015 | SC 13G |
| 06 Mar 2015 | QUANT GLOBAL CAPITAL ADVISORS, LLC |
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