InvestorsWintershall cancels annual conference due to attacks on UkraineeditorFebruary 24, 2022May 25, 2022 by editorFebruary 24, 2022May 25, 20220341 Wintershall cancels annual conference due to attacks on Ukraine. By Ana Paula Ferrer. As a response to the current Russian attacks on Ukraine, Wintershall Dea,...