I suggest you refile, and this time characterize the company as a "listed company subsidiary." Before you do so, get together your documentation of that fact. First, identify the parent company's stock symbol and pull up something on the Internet that shows them trading on a national exchange. Print it and keep it.
Then, take a look at the SEC's EDGAR site for filings that show that your supermarket chain was purchased by the European company and their stock de-registered. Print that, too, for the file. That will demonstrate their subsidiary status.
Periodically, check to make sure there are no filings indicating that the parent sells the chain.