Benjamin de Rothschild inherited the Château Clarke wine estate purchased by his father in 1973. He renovated the fermentation room and hired the oenologist Michel Rolland in 1998 to perfect the Château’s vines and supervise the family’s new vineyard ventures in South Africa and Argentina.

Following his graduation, Benjamin de Rothschild worked in family-owned banks in California. In 1989, he came back to Europe and launched the Compagnie de Trésorerie Benjamin de Rothschild specialized in advanced financial risk management.

After the death of his father in 1997, he succeeded him as chairman of the Compagnie Financière Edmond de Rothschild. He restructured the group’s organization around key activities such as asset management and M&A. In 1999, he launched Edmond de Rothschild Investment Services in Israel where he also succeeded to his father at the helm of the Caesarea Rothschild Foundation. In 2010, Compagnie Financière Edmond de Rothschild became the Edmond de Rothschild Group.

In 1997, Benjamin de Rothschild initiated a joint-venture with Anton Rupert to create the Rupert & Rothschild Vignerons vineyards in South Africa. He gathered wine enthusiasts (including Laurent Dassault) to create the wine estate Le Clos de los Siete in Argentina’s Uco Valley, producer of the Flechas de los Andes wine. In 2003, he acquired the Château des Laurets vineyards in Bordeaux. In 2005, he launched Champagne Barons de Rothschild with Baron Éric de Rothschild and Baroness Philippine de Rothschild. In 2009, he launched a joint-venture with the Spanish winery Vega Sicilia. In 2012, he acquired 26 hectares of vines in the Marlborough Region to produce the Rimapere wine. Benjamin de Rothschild is also the largest stakeholder in the Château Lafite Rothschild wine estate.

On 23 January 1999, Benjamin de Rothschild married Ariane Langner. They have 4 daughters.

In 2000, Benjamin de Rothschild purchased the 62-foot long Elf Aquitaine and founded the professional sailing team Gitana Team, walking in the footsteps of the family tradition but eventually expanding it to multihulls sailboats. The team’s first trimaran was the Gitana IX (former Elf Aquitaine), followed by the Gitana X, entirely developed by the team. The Gitana VII won the Route du Rhum 2006.

In 2014, the team decided to build a new, state-of-the-art yacht. In 2015, the team mounted foiling daggerboards and T-rudders on a Multi One Design 70ft to make it “fly” over water. On 17 July 2017, the 32×23-meter Maxi Edmond de Rothschild (Gitana 17) was introduced, the offshore racing’s first maxi-multihull designed to fly in the open ocean. It was decorated by the street artist Cleon Peterson. The Maxi won the 48th edition of the Rolex Fastnet Race in August 2019, breaking the record set in 2011 by Loïck Peyron (Banque Populaire V) and the Brest Atlantiques in December 2019 (skippers Charles Caudrelier-Franck Cammas for both races).

In March 2015, Benjamin de Rothschild named his wife Ariane de Rothschild CEO of the Group, and Chairwoman of the executive committee. In 2016, all the lifestyle-oriented assets of the group were reorganized under the Edmond de Rothschild Heritage label. In March 2019, the Benjamin de Rothschild family made the Edmond de Rothschild Group 100% privately-owned. The group’s French bank was integrated to the Swiss bank which subsequently became the Group’s main holding structure. Ariane de Rothschild became Chairman of the new group and Vincent Taupin CEO.

His family wealth ranked 22nd on Challenges 2019 list of French fortunes, 43rd on Bilan 2019 list of Swiss fortunes, and 1349th on Forbes 2019 list of world billionaires. He is considered one of the richest members of the Rothschild family.