Rare and exotic Higgs decays, including new scalars

The latest results in the search for rare and exotic Higgs boson decays are presented. The analyses are performed using proton-proton collision data collected with the ATLAS and CMS detectors at the LHC at a centre-of-mass energy $\sqrt{s} = $ 13 TeV. Several decay modes are reviewed, including very rare Standard Model decays as well as decays not predicted by this theory, such as lepton-flavour-violating decays and decays to non-Standard-Model particles. No evidence for new physics is found and the results are interpreted to set limits on the cross section times branching fraction of such decays. \\ \\Published in \textit{Proceedings of Science}, DOI: doi.org/10.22323/1.350.0103