Former CEO and Co-Founder of has·to·be Martin Klässner and colleague Jerolim Filippi have unveiled GrowthSquare GmbH, a company specialising in developing a people-centric strategy execution methodology. The ‘Art of Acceleration’ (AOA) strategy, developed by Klässner and Filippi, allowed has·to·be to outperform competitors and scale successfully, with the firm reaching a market share of over 30%