The question between the roles of Jolla Ltd. HK and Jolla Oy FI was still opened the last time I checked, and so is the impact of Rostelecom which seems involved more in Jolla Ltd (not clear).

While at fossnorth18, Cybette has taken the following picture of a presentation by James Noori from Jolla:
https://twitter.com/cybette/status/988406967973621761

We can read "Jolla Ltd develops and licenses Sailfish OS", then that they have offices in Helsinki, Tampere and HK.
So on one hand they explicitely mention Jolla *Ltd*, not Oy. But on the other hand they say they have offices in Finland, where it should be Jolla Oy...

The more they talk, the less clear it is about who does or owns what...