So Big 4 [HOT - 2027]

: They originated from the "Big Eight" firms of the 20th century. Mergers and the 2002 collapse of Arthur Andersen (due to the Enron scandal) eventually left only these four giants.

The phrase "" typically refers to the four largest professional services networks in the world: Deloitte, PwC (PricewaterhouseCoopers), EY (Ernst & Young), and KPMG. These firms dominate the global market for auditing , tax, consulting, and advisory services. The Core Firms so big 4

As of early 2026, these firms collectively generate over in annual revenue and employ more than 1.5 million professionals globally. : They originated from the "Big Eight" firms