I believe it's the US-based operations, which includes USA, Australia, New Zealand, and Canada. The story of how the US can force them to sell is long, but it

I believe it's the US-based operations, which includes USA, Australia, New Zealand, and Canada. The story of how the US can force them to sell is long, but it boils down to some powers granted to the President that allow the office to freeze assets of foreign people or groups if they're determined to be a threat to the American economy or national security. It's useful in that it allows the US to freeze assets for e.g. terrorist organizations, but also as we can see, can be abused somewhat.