
First clinical data for leniolisib in a larger group of PID participants beyond APDS, supporting the potential of targeted PI3Kδ inhibition to address immune dysregulation Leniolisib was well-tolerated, with benefits observed across multiple measures of immune dysregulation, including improvement in lymphoproliferation and positive trends in lung and liver disease markers All participants who completed the study elected to continue receiving treatment in a long-term extension study Leiden, the Netherlands, October 14, 2026: Pharming (Euronext Amsterdam: PHARM/Nasdaq: PHAR), a global biotechnology company focused on rare immune and genetic diseases, today presented positive topline data from its Phase II trial of leniolisib in genetically identifiable primary immunodeficiencies (PIDs) with immune dysregulation linked to altered PI3Kδ signaling. The data, accepted as a late-breaking abstract, were presented as a poster at the 22nd Biennial Meeting of the European Society for Immunodeficiencies (ESID), taking place October 14-17, 2026, in Maastricht, the Netherlands.










