Shares in PKN Orlen fell by more than 10 percent on Friday after the company announced its plans to take over Energa for PLN 2.9 billion a day earlier. Energa shares rose by over 6 percent. On Friday morning the price for PKN Orlen shares was PLN 78-79 against PLN 87 at the closure on the previous day. This means a drop in the company's valuation by about PLN 3.7 billion over one night.