Editing Big Four accounting firms (section)

=== Big Six ===
Competition among these firms intensified, and the Big&nbsp;Eight became the Big&nbsp;Six in 1989. In that year, Ernst & Whinney merged with Arthur Young to form Ernst & Young in June, and Deloitte, Haskins & Sells merged with Touche Ross to form Deloitte & Touche in August.

The Big Six after both mergers occurred were:

*Arthur Andersen
*Coopers & Lybrand
*Deloitte & Touche
*Ernst & Young
*KPMG
*Price Waterhouse

There has been some merging of ancestor firms, in some localities, which would aggregate brands belonging to the Big Four today, but in different combinations than the present-day names would otherwise suggest. For example, the United Kingdom local firm of Deloitte, Haskins & Sells merged instead with the United Kingdom firm of Coopers & Lybrand. The resulting firm was called Coopers & Lybrand Deloitte, and the local firm of Touche Ross kept its original name. It was not until the mid-1990s that both UK firms changed their names to match those of their respective international organizations. Meanwhile, in Australia, the local firm of Touche Ross merged instead with KPMG.<ref>{{Cite web|url=http://www.deloitte.com/dtt/article/0,1002,cid%253D12279,00.html|title=missing|access-date=2008-08-06|archive-date=2007-11-29|archive-url=https://web.archive.org/web/20071129162108/http://www.deloitte.com/dtt/article/0,1002,cid%253D12279,00.html|url-status=dead}}</ref><ref>{{Cite news |last=Cowan |first=Alison Leigh |date=1989-12-05 |title=Deloitte, Touche Merger Done |work=The New York Times |url=https://www.nytimes.com/1989/12/05/business/deloitte-touche-merger-done.html}}</ref> It is for these reasons that the Deloitte & Touche international organization was known as DRT International (later DTT International), to avoid use of names which would have been ambiguous, as well as contested, in certain markets.{{citation needed|date=September 2021}}