Open Data and, in general, reproducible research, has become one of the main goals of scientific communities. An adequate policy on Open Data together with the right sharing tools enables academic and scientific reuse of the data, boosting future discoveries, improving the learning curve of the future researchers and helping science to move forward faster. These proceedings summarize the Open Data strategy from the point of view of the four main experiments at the LHC: ATLAS, CMS, LHCb and ALICE.