Forvis Mazars

The original Mazars firm was formed in Rouen, Normandy, France in 1945 by Robert Mazars. He was chief executive officer until 1983, when Patrick de Cambourg was appointed the position. de Cambourg began internationalizing the firm, which counted 33 employees in 1977. From 2011 to 2016, Philippe Castagnac was chief executive officer. He was succeeded by Hervé Hélias.

In 2023, the US-based Forvis acquired the US operations of Mazars, and an agreement was reached to operate internationally under the brand Forvis Mazars from June 2024. Subsequently, the firms operate as a network, doing business as Forvis Mazars LLP in the United States and Forvis Mazars Group SC in other countries, with a combined global workforce of over 40,000. The two firms are still owned by their respective partnerships, with separate profit pools, but are overseen by a global board.

Since April 2019, US President Donald Trump's attorneys have been involved in a controversy regarding a House Oversight Committee request for financial records held by Mazars USA. In February 2021, the Committee reissued a subpoena for the documents previously sought.

In 2022, following the collapse of FTX, Mazars was engaged by Binance to perform a "proof of reserves" audit. This work was later halted, and Mazars decided to suspend all work with cryptocurrency-affiliated customers in December 2022.