Many interesting extensions to the Standard Model predict
nonstandard decays of the 125 GeV Higgs boson. The ATLAS and CMS
experiments at the LHC have searched for processes including
decays of the Higgs boson to long-lived, weakly interacting
particles, decays of the Higgs boson to dark photons, decays of
the Higgs boson to pairs of new (pseudo)scalars, and
lepton-flavor violating decays of the Higgs boson. This note
will summarize the state of these analyses using data taken
through the end of 2016.