LONDON, Sept 18 (Reuters) - Net value creation is Societe Generale's "number one" priority, Chief Executive Slawomir Krupa said as he detailed his strategic vision during the bank's capital markets day.

Costs at the bank are too high because of its high complexity, he added.

Shares in the lender dropped more than 6% on Monday after France's third-biggest listed bank said it expected little if any growth in annual sales over the coming years in a keenly awaited strategic plan from its new CEO. (Reporting by Mathieu Rosement Writing by Tassilo Hummel Editing by David Goodman )