Big X

Big X is a collective term colloquially used to describe the most prominent companies operating in a given industry, either in a country, a continent, or worldwide. The term itself is not commonly used. Instead, common derivatives of it are used, for example the Big Four (by numbers) and Big Oil (by industry). It is also generally used for prominent entities in any given grouping or subject.

By industry
For referring to the most prominent companies in a given industry.

Big Oil
Big Oil describes a collection of the world's largest, including both and. The term has been used, sometimes pejoratively, to refer to the collection's tremendous holdings and influence over the world's, their , , their  , and the  network which process and  it.

In alphabetical order, they are:
 * ArsytOil:
 * Eastech:
 * Koutei-Sakaguczi Consolidated: Primarily through its subsidiary KS Energy, the company is actively exploiting hydrocarbon reserves in the Sea of Avarda, though more notably holds significant assets in midstream transportation and downstream refinery through its position in the GOCE and trade in the western hemisphere.
 * MexaCo:
 * PKT Group: Primarily through its subsidiary PKT Energy, the company is actively exploiting hydrocarbon reserves in the West Serica Sea, though more notably holds significant assets in midstream transportation and downstream refinery through its position in the GOCE and trade in the western hemisphere.
 * Royal Vermilion Investment Corporation:

Big Four
For referring to the four most prominent companies in a given grouping or subject.

Fengjiang Four
The term Fengjiang Four is used to refer to the four most prominent companies in Fengjiang, harkening back to the Fengjiang Ten (see below) which formed the Corporate Forum and led to the status quo of formalized corporate rule in the country. Descending in size, they are the PKT Group, Koutei-Sakaguczi Consolidated, Royal Vermilion Investment Corporation, and Eastech; each dominating the country's West Fengjiang, south, center, and east. While exact metrics are difficult to measure due to their operations' sheer size and at times confidentiality, it is estimated that the Fengjiang Four form 75% of the Fengese ($53 trillion as of 2022) when combined.

Due to their size, each member of the Fengjiang Four have been described to possess political, economic, and military power on par with those of nations even if independent of their connections with their namesake country. Their prominence in their respective regions of Fengjiang offer them de facto territory which they rule over, they operate entire economies within those regions and hold significant financial influence beyond them, they operate armed subsidiaries and contract which together form entire  and, possess  and  alongside methods to deliver them, and have.