The company ended going belly up because Eric's dad used their mother's trust fund to build it, and they weren't legally married. I'm sure everyone lost their jobs, including Neil. He probably never saw Eric again.
The company didn't go belly up. His father just lost ownership. The money and company belong to their rightful owner, the mother and her heirs. Eric didn't say it went bankrupt, he said he planned to dismantle it and start over. Meaning he would have sold pieces here and there. With his sister and brother in prison, he had the only control. They would be entitled to money when free though.