Tomkins plc was a multinational engineering company headquartered in London, United Kingdom. In July 2010 Tomkins was acquired by a Canadian consortium of private equity firm Onex Corporation and the Canada Pension Plan Investment Board. In July 2014, The Blackstone Group, the world's largest buyout firm, agreed to acquire The Gates Corporation, the largest division of Tomkins plc from Onex Corp. (OCX) and Canada Pension Plan Investment Board for $5.4 billion.