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Allschwil, Switzerland – April 10, 2026 Idorsia Ltd (SIX: IDIA) today issued the invitation to the upcoming Annual General Meeting (AGM) of Shareholders on behalf of the Board of Directors. The meeting to approve the Annual Report of the year ending December 31, 2025, will be held on Wednesday, May 6, 2026, at 14.00 CEST at the Congress Center, Messe Basel, Switzerland.

Allschwil, Switzerland – April 9, 2026 Idorsia Ltd (SIX: IDIA) announces the appointment of Dr Amer Joseph as Executive Vice President, Chief Medical Officer (CMO) & Head of Global Clinical Development, effective May 1, 2026. He succeeds Dr Alberto Gimona, who is retiring.

Idorsia Ltd (IDRSF) Discusses Positive Phase II Results for Daridorexant in Pediatric Insomnia and Neurodevelopmental Disorders Transcript

Allschwil, Switzerland – March 24, 2026 Idorsia Ltd (SIX: IDIA) announces that the Board of Directors will propose three candidates for election to the Board at the upcoming Annual General Meeting of Shareholders: Natalia Misciattelli, Chief Executive Officer and member of the Board of Directors at AAVantgarde Bio; Gabriel Baertschi, Chief Executive Officer of Grünenthal; and André C. Muller, former Chief Executive…

Ad hoc announcement pursuant to Art. 53 LR Allschwil, Switzerland – March 16, 2026 Idorsia Ltd (SIX: IDIA) announces that Dr Srishti Gupta and the Board of Idorsia have mutually agreed that Srishti will step down from her role as Chief Executive Officer (CEO).