BASF SE Chief Executive Officer Kurt Bock

BASF SE Chief Executive Officer Kurt Bock

Hannelore Foerster/Bloomberg

BASF SE Chief Executive Officer Kurt Bock has bought 12 companies in areas such as battery materials and biological crop-care and spending of Ludwigshafen, Germany-based BASF on takeovers still dropped to $2 billion in 2012 compared with an average of $3.5 billion in the prior six years, according to Bloomberg data.