The club grew progressively thanks to mergers with other teams and the support of the Spanish University Union (SEU).

In 1976 they finished runners-up in the Generalissimo Cup and were champions of the Spanish Youth Championship.

However, they gained promotion the following year, as champion of the Primera Nacional (the then-name of the second flight).

The 1985–86 season was the last of CAU Madrid in the top flight of Spanish rugby.

In 2010–11, they won promotion to the Primera Nacional (by this time the third tier), returning to a national level after twelve years of absence.