To be fair, the public companies are in the notes in the form as:

[dev1002][dev1003] New sidequests have been added.

If you look for these tags:

[dev1002] Storylines and world quests
[dev1003] Public company quests

So there should be sidequests for them. BUT there's another tag that specificaly says:
[dev1034] Introduction of public companies

So i dont know what to think anymore XD