Who Is Sébastien Auzière? Brigitte Macron’s Son Explained

On 7 May 2022, Emmanuel Macron was sworn in for a second term at the Élysée Palace. Press photographers briefly caught Brigitte Macron’s eldest son in frame, standing with his wife and children before stepping out of shot. That photograph has appeared in more articles about him than anything he has ever said in public. He has never said anything in public.

He turned 50 this year. For more than 25 years, his work has been in health data, statistical modelling, and life sciences consulting, carrying him through some of the largest health research organisations in Europe. Through nearly a decade of his stepfather’s presidency, two investitures, a recurring political controversy about polling, and a 2025 family property filing, he has said nothing.

Sébastien Auzière is a French statistical engineer born in 1975 in Amiens. The eldest son of Brigitte Macron and the late banker André-Louis Auzière, he is the stepson of President Emmanuel Macron. His career spans Kantar Health, Cerner Enviza, and Oracle Life Sciences. He lives in the greater Paris region with his wife, Christelle Lorenzato, and their two children, Camille and Paul.

At a Glance

A Family Rooted in Amiens

Sébastien’s mother comes from one of Amiens’ most established families. Maison Trogneux has been on the city’s streets since 1872, a chocolaterie known above all for its Amiens macarons. It remains in business today.

His father, André-Louis Auzière, was a career banker. He worked as a branch director at the BFCE (Banque Française du Commerce Extérieur) and moved the family with each posting: Strasbourg, then Truchtersheim in Alsace from 1987 to 1991, then back to Amiens. He and Brigitte had married on 22 June 1974 and had three children together: Sébastien in 1975, Laurence in 1977, and Tiphaine in 1984.

The course of the family changed in the 1992-1993 school year. Brigitte was teaching literature at Lycée La Providence in Amiens and running a theatre workshop. Emmanuel Macron, then 15 years old, was one of her students and sat in the same class as Laurence Auzière. What followed over the years ended the marriage. The divorce was finalised on 26 January 2006.

The Father Who Chose to Disappear

After the separation, André-Louis Auzière gave no interviews and issued no public statement of any kind. He stepped entirely out of view and stayed there for the rest of his life.

He died on 24 December 2019 in Paris, aged 68, after a prolonged illness. The family said nothing for ten months. In October 2020, Tiphaine confirmed the death in Paris Match, telling the magazine:

“Je l’adorais, c’était un être à part, un anticonformiste qui tenait plus que tout à son anonymat. Il faut le respecter.”

“I adored him. He was a unique being, an unconventional man who valued his anonymity above all else. We had to respect that.”

He was cremated at Père-Lachaise in complete privacy. No official representatives attended. Nothing came from the Élysée.

His Career: Twenty-Five Years in Health Data

After his baccalauréat, Sébastien enrolled at ENSAI (École Nationale de la Statistique et de l’Analyse de l’Information) in Rennes, graduating in 1999 with a master’s in statistics. It is one of France’s most selective engineering schools for data science, ranked consistently among the top tier of French engineering programmes by Figaro Étudiant.

His wife, Christelle Lorenzato, also graduated from ENSAI in 1999. They almost certainly met there. Christelle has built her own independent career as head of biostatistics in oncology at Sanofi, France’s largest pharmaceutical company, a position she has held for well over 15 years.

Sébastien’s career across 25-plus years:

Kantar Health’s work covers patient studies, pharmaceutical market research, and treatment tracking data for healthcare companies across dozens of countries. Sébastien joined the organisation in 2007 and reached Senior Vice-President level in January 2016. In April 2021, the American group Cerner acquired Kantar Health. He moved into Cerner Enviza and then Oracle Life Sciences after Oracle completed its acquisition of Cerner. By October 2023, he held the title of Head of Business Consulting Life Science at Oracle.

Signals from his professional network in 2025 pointed to a departure from Oracle. His next role has not been publicly announced.

The Polling Accusations That Never Held Up

The most repeated claim about Sébastien Auzière is that his senior position at Kantar gave him the ability to influence political polling results in Macron’s favour.

It has appeared in different forms at different moments. Far-right politicians Louis Aliot and Jean-Lin Lacapelle circulated an early version in March 2017, shortly after Macron entered the Élysée. In January 2022, Jean-Luc Mélenchon posted a version targeting Ipsos, suggesting a link between Sébastien’s role and a poll showing Macron ten points ahead. He deleted the tweet after it was publicly challenged. On 27 March 2022, Jean Lassalle raised similar accusations during a broadcast on France Inter.

Each version was addressed by mainstream French fact-checkers:

• Le Monde’s Décodex dealt with the original claim on 26 September 2017
• France Info published two separate fact-check reports on different iterations of the story
• Arte’s Désintox ran a television segment on it
• The French Wikipedia article on Kantar TNS MB formally records the episode as documented political disinformation

The position of all four, based on public records and Sébastien’s verified LinkedIn profile:

• He worked at Kantar Health, a subsidiary that does health sector market research for pharmaceutical clients
• Kantar Health covers patient surveys, treatment access studies, and epidemiological data analysis — none of it electoral or political polling
• IFOP and Kantar are entirely separate companies with different shareholders and corporate structures
• His career, verified independently by multiple major French outlets, contains no political research of any kind

His Siblings: Laurence and Tiphaine

Sébastien is the eldest of three. His sisters have taken more visible paths.

Laurence Auzière-Jourdan (born 1977) is a cardiologist, married to Guillaume Jourdan, with children Emma and Thomas. She was in the same class as Emmanuel Macron at Lycée La Providence. During the 2017 presidential campaign, Paris Match described her as the “anti-stress fairy” of Macron’s inner circle, providing medical guidance to the candidate under pressure.

Tiphaine Auzière (born 30 January 1984) is a lawyer, a novelist, and the founder of Lycée Autrement, an alternative school in Paris. Her debut novel Assises was published in 2024. She is the most publicly active of the three and was the one who confirmed their father’s death in Paris Match in October 2020.

Brigitte Macron has seven grandchildren in total.

The Four Times He Has Appeared in Public

Since Emmanuel Macron’s election in 2017, Sébastien Auzière has been photographed at four confirmed events:

1. 17 April 2017: En Marche’s Bercy rally, the major campaign gathering before the first round. Attended with Christelle and the wider Auzière family.
2. 14 May 2017: Emmanuel Macron’s first investiture at the Élysée Palace. Attended with Christelle and their children. Photographed by Getty Images.
3. 7 May 2022: Macron’s second investiture, following re-election on 24 April 2022. Attended with Christelle, Camille, and Paul. Confirmed by PurePeople and Getty Images.
4. 28 November 2023: PSG vs Newcastle United, UEFA Champions League, Parc des Princes (1-1). Attended with family, seated in the VIP section. Reported by PurePeople the following morning.

He also provided technical support to En Marche’s digital operations during the 2017 campaign before stepping back entirely after the election. The Auzière family operates under permanent police protection.

SCI Bremselati: The 2025 Property Filing

On 6 February 2025, a new entry appeared in France’s official business registry. A Société Civile Immobilière called SCI Bremselati was incorporated, registered at Villa Monéjan, 16 avenue Saint-Jean, Le Touquet — a property belonging to Brigitte Macron. An SCI is a private real estate holding company used commonly in France for family asset management.

The company’s five members, as reported by Boursorama:

• Emmanuel Macron
• Brigitte Macron
• Sébastien Auzière
• Laurence Jourdan née Auzière
• Tiphaine Auzière

The SCI acquired a sea-view villa at 67 boulevard du Docteur Jules Pouget in Le Touquet, with a building permit filed for extension and renovation. The filing is notable for two reasons: it marks the first time Emmanuel Macron has been formally registered as a property owner in France, and it is the first time Sébastien Auzière’s name has appeared in a formal legal structure alongside the presidential couple.

He has not commented on it.

In February 2025, for the first time, Sébastien Auzière’s name sat in an official document alongside Emmanuel Macron’s. Before that, his connection to the French presidency existed in photographs he did not arrange, in accusations he never answered, and in a biographical record assembled almost entirely by other people. After nine years of one of France’s most scrutinised presidencies, he has not made a single public statement about any of it. His profile belongs to those who wrote it, which, given everything known about the man, is probably closer to a statement than silence usually gets.