It’s not uncommon for a firm to have an association with an adjective. The description is often derogatory; for example, acquisitive companies are often said to be rapacious.

For Glencore, the commonly used adjective is “secretive”. This is no doubt due to the deliberately low profile of its CEO, Ivan Glasenberg, as well as its history as a private company. It was commonly referred to as “the biggest company you’ve never heard of”.