It is a NZX listed company. The ownership is hard to know, as shares are often purchased by fund managers. But I had heard that NZ mum and dad shareholders could own around 50% of it. So if that is the case it is largely an NZ owned company and it's profits largely stay in NZ. I think the same would apply for chorus, as there was a share split, so people who where telecom shareholders, also became chorus shareholders..