Wal-Mart, the world’s largest retailer, has assets worth at least $76 billion through shell companies domiciled in Luxembourg and the Netherlands, the report said. The report says Wal-Mart does not list these subsidiaries in its annual filings and called on the U.S. Securities and Exchange Commission to require disclosure to make the tax practices transparent to investors. Wal-Mart spokesman Randy Hargrove said the report contained erroneous information designed to mislead readers.