It is possible for many people to commit individual acts that when done alone are not a felony, but when combined as part of an organization are.

Convicting a mid-level manager of murder because he turned a valve on, when they to the best of their knowledge, had no idea it would result in 100 people dying in a fire would also not be justice - at least if the necessary records got lost by some lower level functionary somewhere else, and it never got fixed because an exec somewhere was prioritizing some other work elsewhere without having the records of how bad it was.

PG&E has 26,000 employees. Even with as screwed up as it is, the problem is the organization itself. Putting all 26k people in jail doesn't solve the problem either.

But then that breaks OP's model of "there is no company."