the boc group plc was the official name of the multinational and british-based industrial gas company more commonly known as boc, and now a part of linde plc. in september 2004, boc had over 30,000 employees on six continents, with sales of over £10.6 billion. boc was a constituent of the ftse 100 index and the ft 30. on 5 september 2006 the boc group became part of the linde group of germany and