Seems final creditor or the government demanded back tax and a foreclosure is going to happen and business will shut.
BREAKING DOWN 'SEC Form 15' When a company files an SEC Form 15, it usually means one of two things. It may mean that a company is ceasing to exist in a publicly-traded form, either returning to privately-held status or going out of business altogether. Alternatively, it may mean that a company is simply canceling a certain class of securities, replacing them with another.