The DIY chain Mrówka belonging to Grupa PSB in Poland now operates 210 stores following a further eight store openings since November. At the end of 2015 the chain had 208 stores. The latest new openings include three stores in the small Mini-Mrówka format. The income of the whole retail network increased by 22 per cent in 2015 to roughly PLN 1.3 bn. In total the PSB Group has notched up cumulative revenues from building material sales amounting to PLN 5.2 bn.