Who supplies the information being sometimes available in Embase records within a field "Drug Company"?

Elsevier provides the name of the company which manufactured the drug or device being discussed in the article when it's available. Usually, they provide the company name together with the trade name of the drug, and often the company’s country.  For example:

Occasionally they don’t have the drug name but they do have the company name, so they provide that without any link to a product. We display that in the non-specific ‘Drug Company’ field

but it’s searchable just like all the other company information with the field qualifier CO.