I have a client, Company X, that has a DB Plan covering the Mother who owns 99% of the stock, the Son who owns 1%, and a rank and file employee. At the end of 2005, the rank and file employee terminated and was fully paid out.
I know that PBGC regs do not attribute stock from Mother to Son so normally this plan would remain covered under PBGC in 2006. However, if the Mother and Son have other companies that form a controlled or affiliated group with the Company X though these other companies are not part of the DB Plan , and if the Son owns more than 10% of one of these other companies, would he be considered a "substantial owner" for purposes of PBGC coverage of Company X?