ATLAS measurements of production, decays and spectroscopy of heavy flavour hadrons Novotny Radek University of New Mexico 2020 Recent results from the ATLAS experiment on production, decays and spectroscopy of heavy flavour hadrons will be presented. The latest results on the CP violation in B_s to J/psi phi decays will be discussed. Measurements of the inclusive and associated charmonium production will be also reported. In addition, searches for pentaquarks with hidden charm and recent results on B_c meson production and decays will be highlighted. PUBLATLASSLIDE