‘CandidatusPhytoplasma ulmi’ (Ca.P. ulmi) belongs to the ribosomal subgroup 16SrV-A and is associated with dieback, shoot proliferation and yellows disease on variousUlmusspp. Other plant species, such asCarpinus betulusandPrunusspp. have also been reported infected by the same pathogen. In 2021, in the frame of research activities focused on grapevine’s Flavescence dorée (FD), one specimen ofOrientus ishidae- an East Palearctic leafhopper that was identified as an alternative vector of FD phytoplasmas - was found harboringCa.P. ulmi in southern Switzerland. No phytoplasmas were detected in plant samples taken in the same location.Orientus ishidaehas already been reported to be able to acquire diverse phytoplasmas associated with other plant diseases, such as Peach X-disease. This is the first report ofCa.P. ulmi in Switzerland, as well as inO. ishidae.Ca.P. ulmi may potentially be present in the wild compartment of the Swiss Pre-alpine and Alpine range, but no dedicated survey has so far been conducted. In the case ofO. ishidae, this finding highlights the broad affinity of such a species for the acquisition of several phytoplasmas. This calls for a further investigation regarding its potential role as a vector on various pathosystems of agronomic importance.