I am not aware that BAT owns any substantial holdings in STG. Do you have a cite for that?
In 2007/08 BAT and STG did a swap, where BAT acquired STG's snus and cigarette operations and STG acquired BAT's pipe tobacco operations. Aside from that little ballet, and the polite hand holding that followed including STG buying BAT's cigarette and RYO business in Norway in 2009, the two companies remain entirely separate entities, to the best of my knowledge.
In 2007/08 BAT and STG did a swap, where BAT acquired STG's snus and cigarette operations and STG acquired BAT's pipe tobacco operations. Aside from that little ballet, and the polite hand holding that followed including STG buying BAT's cigarette and RYO business in Norway in 2009, the two companies remain entirely separate entities, to the best of my knowledge.