> splitting a large company in many legally discinct 149-employee legal entities is possible

Sure it might be work to set up the first subcompanies, but once you have that can't you just replace the company name in all the legal texts? Also I think large companies already do have tons of subcompanies, so I guess that cost already got paid?

> And simply faking many 149-employee LLCs while not having them actually be real entities is both unlikely to succeed

You do not need to fake it, you can just rent it?