Topaz was an Irish petroleum retail chain, which had a presence across the island of Ireland.

As of 2012, Topaz operated 118 Company Owned Company Operated (COCO) sites in the Republic of Ireland and 1 site in Larne, County Antrim, Northern Ireland Billionaire Denis O'Brien acquired Topaz in December 2013, having bought €300 million of its loans from Irish Bank Resolution Corporation (IBRC).

[3] In December 2014, Topaz's parent company Kendrick Investments announced it would buy all of Esso's Irish operations.

[7] Subsequently, most of the Denis O'Brien-connected Directors retired from the Board and the CFO Niall Anderton was appointed as CEO.

In 2018, the Topaz brand was retired in favour of Alimentation Couch-Tard's international company Circle K in April 2018.