Claudio López y Bru, 2nd Marquess of Comillas, GE (1853 in Barcelona – 1925 in Madrid), was a Spanish peer, businessman, and immensely rich shipping magnate and landowner.

In the following years, Claudio himself would expand his father's estate, with coal company Hullera Española, Banca López Bru, Constructora Naval and Banco Vitalicio.

As soon as he got the news, Claudio went to the spot and sent a train from Barcelona with doctors, nurses, firemen and medical equipment in order to treat the thousands of wounded.

After this action, Claudio consistently refused any attempt by the authorities to honor and reward him, stating simply that he had done merely his duty as a Christian.

The most characteristic efflorescences of Catholic Action at this time were words and gestures rather than purposeful organisations, - congresses and processions rather than flourishing workers' associations.

And, impressed by the Catholic Railwayman's syndicate, led by Agustin Ruiz, and its performance in opposing the railway strike of July 1916 and the general strike of August 1917, tried hard to create an accompanying web of Catholic miners syndicates, especially in the militant Asturian pits, where he himself owned pits.

Claudio was also influential in the Popular Social Action (ASP) initiative, founded by a Jesuit priest, Gabriel Palau, in 1907 in Barcelona.