November 1945, at an extraordinary general meeting of the Société Anonyme des Avions Marcel Bloch the company voted to change its form to a limited liability entity, Société des Avions Marcel Bloch, which was to be a holding company. On 20 January 1947 Société des Avions Marcel Bloch became Société des Avions Marcel Dassault to reflect the name adopted by Marcel Bloch's brother (Darius Paul Dassault) while being active in the French Resistance.

In 1954, Dassault established an electronics division (by 1962 named Electronique Marcel