Bonnie Brennan

Brennan's very early career was in the advertising business.^[3]

She began her auction-house career at Sotheby's, in 1997.^[5] She worked in various business development roles focused on trusts and estates in New York,^[5] eventually reaching the position of senior vice president.^[3]

Brennan moved to Christie's in 2012.^[5] She rose through positions including head of trusts, estates, and wealth management for Christie's Americas.^[5][8] By 2020 she was chairman of business development of Christie's Americas;^[9] in this position she helped secure and manage major estate sales such as the 2018 Barney A. Ebsworth auction, as well as the collections of Jayne Wrightsman and the non-profit Cleveland Clinic.^[5]

In 2021 she was appointed president of Christie’s Americas,^[5] and during her tenure the region grew to account for 48 percent of Christie's sales.^[10][11] She played a key role in securing Microsoft co-founder Paul Allen's $1.6 billion art collection for Christie's auction,^[1] and oversaw the auctions of the collections of Ann and Gordon Getty and Anne H. Bass.^[12] She also championed increasing Christie's digital strategy and diversifying the auction house's offerings to engage younger and more diverse buyers.^[12][13]

On February 1, 2025, Brennan was appointed chief executive of Christie's, succeeding Guillaume Cerutti.^[11] She stated that she plans to preserve Christie's heritage while focusing on innovation and engaging new audiences, geographies and technology, including AI.^[12][14][11]

Brennan is based in New York City,^[1] and divides her time between New York and London.^[15]