Commonly the vehicles were entered for Rosier himself, but he also provided cars for a number of other drivers during the period.

Between 1950 and 1957 Ecurie Rosier collected a total fifteen World Championship points and one podium finish.

Louis Rosier began entering cars in Formula One under his own name in 1950, first with a Talbot-Lago T26C with some success, recording two points-scoring finishes from his nine World Championship entries in 1950 and 1951.

In 1952 Rosier started racing Ferraris, recording only one non-points scoring finish from his four World Championship entries.

1953 was a better season for Rosier, finishing in the top ten five times from his seven entries, but failing to score any points.