Take context from the input text and decide on the accurate relationship between 'Fortum' and 'Uniper' from the options provided.
Options: employer, owner of, distribution format, position held

So, now that Uniper is a strategic subsidiary and the fifth segment of the Fortum Group, it is only natural that my number one short-term priority will be to have a joint strategy for the Group in place by the end of the year.
owner of