Jan 6 (Reuters) - Bumech SA :
* Aviva Investors Poland TFI raises stake in Bumech to 7.02 percent from 3.77 percent
* Change in stake is result of incorporation of ZWG SA into Bumech and issuance of new series F shares offered to current ZWG shareholders at a ratio of two Bumech shares for one ZWG share
* Aviva Investors Poland TFI holds 4,527,091 shares of the company Source text for Eikon: Further company coverage:, (Gdynia Newsroom)