NOT FOR RELEASE, PUBLICATION, DISTRIBUTION IN OR INTO THE UNITED STATES, AUSTRALIA, JAPAN OR ANY OTHER JURISDICTION IN WHICH SUCH RELEASE, PUBLICATION OR DISTRIBUTION WOULD BE PROHIBITED BY APPLICABLE LAWS.

This announcement is not a prospectus and not an offer of securities for sale in any jurisdiction, including in or into the United States, Japan, Australia or South Africa


   -- Idorsia successfully completes the offering of CHF 600 million senior 
      convertible bonds 

Allschwil, Switzerland -- July 28, 2021

Idorsia Ltd (SIX: IDIA, "Idorsia") today announced that it has successfully placed CHF 600 million senior unsecured convertible bonds (the "Bonds") due 2028 convertible into shares of Idorsia (the "Shares") by way of private placement. The net proceeds from the offering will be used to support commercial product launches in several key markets in 2022 (pending regulatory approval) and to fund the further development of the company's advancing late-stage pipeline.

Idorsia's main shareholders, Jean-Paul and Martine Clozel, purchased 29.0% of the Bonds to maintain their current ownership in Idorsia.

Idorsia, as well as Jean-Paul and Martine Clozel, have agreed to a 90-day lock-up period after the issuance of the Bonds, subject to waiver by the Joint Bookrunners and customary exceptions.

Issuance of senior unsecured convertible bonds

The Bonds will have a maturity of 7 years and will be convertible into newly issued registered Shares of Idorsia, sourced from the existing listed conditional share capital, on or after September 14, 2021. The Bonds will have a coupon of 2.125%, payable annually in arrears, and a conversion premium of 40% above the reference price, being the volume weighted average price of a Share on SIX between launch and close of trading on July 28, 2021. The initial conversion price will be announced after close of trading today. The Bonds will be issued and, unless previously converted or repurchased and cancelled, redeemed at 100% of their principal amount with a denomination of CHF 200,000 per Bond on the stated maturity date, which is expected to be on August 04, 2028. Idorsia will be entitled to redeem the Bonds at their principal amount (plus accrued interest) in accordance with the terms and conditions of the Bonds at any time (i) on or after August 25, 2025, if the price of an Idorsia share is equal to or exceeds 150% of the then prevailing conversion price over a certain period or (ii) if less than 15% of the aggregate principal amount of the Bonds originally issued remains outstanding. Holders will be entitled to require an early redemption of the Bonds at their principal amount (plus accrued interest) in accordance with the terms and conditions of the Bonds on August 04, 2026. Holders of the Bonds who convert their Bonds will receive Shares with a par value of CHF 0.05 per share.

The interest on the Bonds will be subject to Swiss withholding tax (which is currently at a rate of 35%).

The settlement date of the Bonds is expected to be on or around August 04, 2021. At settlement, the Bonds will not be admitted to trading or listed on the SIX Swiss Exchange or any other Swiss trading venue. Application for the listing and trading of the Bonds according to the Standard for Bonds of SIX Swiss Exchange may be made at a later stage.

Bank of America, Credit Suisse and Goldman Sachs International were acting as Joint Bookrunners / Lead-Managers and Octavian as Selling Agent on the offering.

Notes to the editor

About Idorsia

Idorsia Ltd is reaching out for more -- We have more ideas, we see more opportunities and we want to help more patients. In order to achieve this, we will develop Idorsia into a leading biopharmaceutical company, with a strong scientific core.

Headquartered near Basel, Switzerland -- a European biotech-hub -- Idorsia is specialized in the discovery, development and commercialization of small molecules to transform the horizon of therapeutic options. Idorsia has a broad portfolio of innovative drugs in the pipeline, an experienced team of professionals covering all disciplines from bench to bedside, state-of-the-art facilities, and a strong balance sheet -- the ideal constellation to translate R&D efforts into business success.

Idorsia was listed on the SIX Swiss Exchange (ticker symbol: IDIA) in June 2017 and has over 1,000 highly qualified specialists dedicated to realizing our ambitious targets.

For further information, please contact

Andrew C. Weiss

Senior Vice President, Head of Investor Relations & Corporate Communications

Idorsia Pharmaceuticals Ltd, Hegenheimermattweg 91, CH-4123 Allschwil

+41 58 844 10 10

investor.relations@idorsia.com -- media.relations@idorsia.com -- www.idorsia.com

The above information contains certain "forward-looking statements", relating to the company's business, which can be identified by the use of forward-looking terminology such as "estimates", "believes", "expects", "may", "are expected to", "will", "will continue", "should", "would be", "seeks", "pending" or "anticipates" or similar expressions, or by discussions of strategy, plans or intentions. Such statements include descriptions of the company's investment and research and development programs and anticipated expenditures in connection therewith, descriptions of new products expected to be introduced by the company and anticipated customer demand for such products and products in the company's existing portfolio. Such statements reflect the current views of the company with respect to future events and are subject to certain risks, uncertainties and assumptions. Many factors could cause the actual results, performance or achievements of the company to be materially different from any future results, performances or achievements that may be expressed or implied by such forward-looking statements. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those described herein as anticipated, believed, estimated or expected.

THE CONTENTS OF THIS ANNOUNCEMENT HAVE BEEN PREPARED BY AND ARE THE SOLE RESPONSIBILITY OF IDORSIA LTD (THE "ISSUER").

THE INFORMATION CONTAINED IN THIS ANNOUNCEMENT IS FOR BACKGROUND PURPOSES ONLY AND DOES NOT PURPORT TO BE FULL OR COMPLETE. NO RELIANCE MAY BE PLACED BY ANY PERSON FOR ANY PURPOSE ON THE INFORMATION CONTAINED IN THIS ANNOUNCEMENT OR ITS ACCURACY, FAIRNESS OR COMPLETENESS.

THIS INFORMATION DOES NOT CONSTITUTE AN OFFER OR INVITATION TO SUBSCRIBE FOR OR PURCHASE ANY SHARES, CONVERTIBLE BONDS OR OTHER SECURITIES IN THE ISSUER (COLLECTIVELY, THE "SECURITIES") TO ANY PERSON IN THE UNITED STATES, AUSTRALIA, JAPAN, SOUTH AFRICA OR IN ANY JURISDICTION TO WHOM OR IN WHICH SUCH OFFER OR SOLICITATION IS UNLAWFUL. IT IS NOT BEING ISSUED IN COUNTRIES WHERE THE PUBLIC DISSEMINATION OF THE INFORMATION CONTAINED HEREIN MAY BE RESTRICTED OR PROHIBITED BY LAW. IN PARTICULAR, THIS INFORMATION IS NOT FOR PUBLICATION OR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN OR INTO THE UNITED STATES OF AMERICA AND SHOULD NOT BE DISTRIBUTED TO PUBLICATIONS WITH A GENERAL CIRCULATION IN THE UNITED STATES. THE DISTRIBUTION OF THIS ANNOUNCEMENT MAY BE RESTRICTED BY LAW IN CERTAIN JURISDICTIONS AND PERSONS INTO WHOSE POSSESSION ANY DOCUMENT OR OTHER INFORMATION REFERRED TO HEREIN COMES SHOULD INFORM THEMSELVES ABOUT AND OBSERVE SUCH RESTRICTION. ANY FAILURE TO COMPLY WITH THESE RESTRICTIONS MAY CONSTITUTE A VIOLATION OF THE SECURITIES LAWS OF ANY SUCH JURISDICTION. SECURITIES OF THE ISSUER ARE NOT BEING PUBLICLY OFFERED. IN PARTICULAR, THE SECURITIES OF THE ISSUER REFERRED TO HEREIN MAY NOT BE OFFERED OR SOLD IN THE UNITED STATES UNLESS REGISTERED UNDER THE US SECURITIES ACT OF 1933 (THE "SECURITIES ACT") OR OFFERED IN A TRANSACTION EXEMPT FROM, OR NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. THE SECURITIES REFERRED TO HEREIN HAVE NOT BEEN AND WILL NOT BE REGISTERED UNDER THE SECURITIES ACT OR UNDER THE APPLICABLE SECURITIES LAWS OF AUSTRALIA, CANADA OR JAPAN. SUBJECT TO CERTAIN EXCEPTIONS, THE SECURITIES REFERRED TO HEREIN MAY NOT BE OFFERED, SOLD OR DELIVERED WITHIN THE UNITED STATES OR TO OR FOR THE ACCOUNT OF U.S. PERSONS EXCEPT IN AN "OFFSHORE TRANSACTION" IN ACCORDANCE WITH REGULATION S UNDER THE SECURITIES ACT OR FOR THE ACCOUNT OR BENEFIT OF ANY NATIONAL, RESIDENT OR CITIZEN OF AUSTRALIA OR JAPAN.

THIS PRESS RELEASE IS NOT BEING ISSUED IN THE UNITED STATES OF AMERICA (INCLUDING ITS TERRITORIES AND POSSESSIONS) (THE "UNITED STATES" OR "US") AND SHOULD NOT BE DISTRIBUTED TO UNITED STATES PERSONS OR PUBLICATIONS WITH A GENERAL CIRCULATION IN THE UNITED STATES. THIS DOCUMENT DOES NOT CONSTITUTE A PROSPECTUS AS SUCH TERMS IS UNDERSTOOD PURSUANT TO THE SWISS FINANCIAL SERVICES ACT (FINSA) OR UNDER ANY APPLICABLE LAWS OR REGULATIONS. ANY DECISION TO PURCHASE ANY SECURITIES REFERRED TO HEREIN SHOULD BE SOLELY BASED ON THE RELEVANT PROSPECTUS. IN ADDITION, NEITHER THE OFFER SHARES, THE BONDS NOR THE SHARES OF IDORSIA LTD INTO WHICH THE BONDS ARE CONVERTIBLE HAVE BEEN OR WILL BE REGISTERED UNDER THE UNITED STATES SECURITIES LAWS AND MAY NOT BE OFFERED, SOLD OR DELIVERED WITHIN THE UNITED STATES ABSENT REGISTRATION UNDER, OR AN APPLICABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF, THE UNITED STATES SECURITIES LAWS. NO PUBLIC OFFERING OF SECURITIES IS BEING MADE IN THE UNITED STATES.

THE INFORMATION CONTAINED IN THIS PRESS RELEASE IS NOT FOR PUBLICATION OR DISTRIBUTION IN AUSTRALIA, JAPAN OR IN ANY OTHER JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OF SUCH JURISDICTION AND DOES NOT CONSTITUTE AN OFFER OF SECURITIES FOR SALE IN AUSTRALIA, JAPAN OR IN ANY OTHER JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OF SUCH JURISDICTION.

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July 28, 2021 09:55 ET (13:55 GMT)