The move will make Moreno agent for a number of Taillan Group wines, including Château Chasse-Spleen and Château Haut Bages.
Alex Canneti, Moreno sales & marketing director, said: "For anyone interested in Bordeaux, Ginestet is a dream to be able to work with, having an unrivalled choice of top quality Bordeaux.
"At a time when Bordeaux is receiving new interest from buyers, we are confident we can offer a superb Bordeaux service."
Ginestet became part of the Taillan Group in 1978. Its wines range from generic Bordeaux up to the top first growths.
Maida Vale-based Moreno will work as supplier of Ginestet to independent wine merchants and the multiples.
The merchant also specialises in Spanish wine and has collections from Italy, Argentina, Chile and Australia.