I don't get your point.
yet no criminal charges are brought against individuals in those companies.
It isn't a company that's persecuted in this case because Samourai has no company IIUC. Logical enough.
Why wasn't Goldman Sachs' CEO indicted?
This is a good question but it's not about selective prosecution. Goldman Sachs was prosecuted too, meaning the case was brought to the court just like this case. Now whether the court itself is biased is a completely different question.