As from 1st January 2015, the public disclosure on Basel 3 leverage ratio started, before its full implementation in 2018. Some authorities, in particular those of United Kingdom and Usa, anticipated the adoption of leverage ratio, even with a macroprudential aim. A first estimate of the potential effects of such regulatory initiatives on a large sample of European banks shows not negligible results, in particular for those players with a relatively low average asset riskweight;these results can be not fully coherent with those coming from the adoption of risk-weighted measures