Sichko, William James
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Main board
| Organisation | Position | From | Until | ||
|---|---|---|---|---|---|
| 1 | NORTHERN CULLET LIMITED | DirDirector | 2005-06-01 | 2016-02-01 | |
| 2 | POTTERS-BALLOTINI LIMITED | DirDirector | 2005-06-01 | 2016-02-01 | |
| 3 | PQ HOLDINGS I LIMITED | DirDirector | 2011-03-18 | 2019-06-13 | |
| 4 | PQ HOLLOW SPHERES LIMITED | DirDirector | 2005-06-01 | 2015-06-12 | |
| 5 | PQ INTERMEDIATE LIMITED | DirDirector | 2011-03-18 | 2019-06-13 | |
| 6 | PQ SILICAS INTERNATIONAL LIMITED | DirDirector | 2008-07-02 | 2013-12-05 | |
| 7 | PQ SILICAS UK LIMITED | DirDirector | 2007-12-20 | 2019-06-13 |
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