The conclusions of EFSA following the peer review of the initial risk assessments carried out by the competent authority of the rapporteur Member State the Netherlands for the pesticide active substance Beauveria bassiana strain 203 are reported. The context of the peer review was that required by Regulation (EC) No 1107/2009 of the European Parliament and of the Council. The conclusions were reached on the basis of the evaluation of the representative uses of Beauveria bassiana strain 203 as an insecticide on Phoenix canariensis (field use, indoor and greenhouse applications) and Phoenix dactylifera (field use) in southern Europe. The reliable endpoints, appropriate for use in regulatory risk assessment, are presented. Missing information identified as being required by the regulatory framework is listed. Concerns are identified.