International Workshop on Searches for the Neutron Electric Dipole Moment. This will be the 4th installment in a series of workshops, aiming to foster cooperation in confronting the challenges of the worldwide search for an EDM of the free neutron. Invited and contributed presentations will survey progress about: production, transport, storage and detection of polarized ultracold neutrons; shielding and generation of magnetic fields; magnetometry; high voltage; Simulation tools; Systematic effects; Theoretical background; Other related EDM searches.