Incorrect - NOT "hidden" = Completed / Ended / Finished / Discharged. The PWC page is for "CURRENT" processes, the former BioAmber has ENDED / COMPLETED / Monitor DISCHARGED / OVER / FINISHED
Yep there are other dead companies on that list who owe no fee lol. Kinda hard to owe a few when BioAmber was liquidated and sold off all its assets over 4 years ago lol