Dassault Group, (GIMD, Groupe Dassault, or the Groupe Industriel Marcel Dassault S.A.) is a French group of companies led by Serge Dassault.

Managing directors are Claude Dassault and Olivier Costa De Beauregard.

Marcel Dassault, born Marcel Bloch (22 January 1892 - 17 April 1986) was a French aircraft industrialist.

Dassault was born in Paris. After graduating from the lycée Condorcet, Breguet School, and Supaero, he invented a type of aircraft propeller used by the French army during World War I and founded the Société des Avions Marcel Bloch aircraft company. Following the nationalization of his company in 1936, under the Front Populaire, he stayed as a director. In 1919, he married Madeline Minckes, the daughter of a wealthy Jewish family of furniture dealers. They had two sons, Claude and Serge.

Being of Jewish heritage and after refusing collaboration with the German aviation industry, he was deported to Buchenwald during World War II while his wife was interned near Paris. He changed his name from Bloch to Bloch-Dassaut and, in 1949, to simply Dassault. Dassault was the pseudonym used by his brother, General Darius Paul Bloch, when he served in the French resistance, and is derived from char d'assaut, French for "battle tank". Marcel Dassault converted to Roman Catholicism in 1950. After the war, he built the foremost military aircraft manufacturer in France, Avions Marcel Dassault. The firm is now the Groupe Industriel Marcel Dassault, whose CEO is Serge Dassault, Marcel's son.

Serge Dassault (born 4 April 1925) is a French entrepreneur (Chairman and Chief Executive Officer of Dassault Group) and conservative politician. According to Forbes magazine, as of 2010^[update] he was the 96th richest person in the world, with a net worth of $9.3 billion.

Dassault is the son of Marcel Dassault, from whom he inherited the Dassault Group and Madeline Dassault (née Minckes). Both his parents are of Jewish heritage but later converted to Roman Catholicism. Since the elder Dassault's death, he has continued developing the company, with the help of current CEO Charles Edelstenne.

Serge Dassault studied at the Lycée Janson de Sailly, the École polytechnique, Supaéro and HEC Paris. During the Second World War, he was jailed when his father was sent to Buchenwald for refusing to cooperate with the Germans in the airplane industry.

Dassault's group also owns Groupe Le Figaro.

He is a member of the Union for a Popular Movement political party, as is his son Olivier, who is a deputy in the French National Assembly. He is a former mayor of the city of Corbeil-Essonnes, a southern suburb of Paris. In 2004, Serge Dassault helped finance the 200-million-euro Islamic cultural center (essentially, a mosque) in his city of Corbeil-Essonnes out of his own funds.