Homburger advises Idorsia Ltd on a placement of 16.4 m shares through an accelerated bookbuilding process, raising gross proceeds of CHF 65.6 m

On October 10, 2025, SIX-listed Idorsia Ltd announced the launch of an accelerated bookbuilding offering, which led to the successful placement of 16.4 m shares at an offer price of CHF 4.00 per offered share, raising aggregate gross proceeds of approximately CHF 65.6 m.

The offering was conducted by way of (i) a placement to professional investors in Switzerland or in any other circumstances relying on an exemption from the obligation to publish a prospectus under the Swiss Financial Services Act, (ii) private placements in certain jurisdictions outside of Switzerland and the United States, and (iii) private placements within the United States to qualified institutional buyers in reliance on Rule 144A under the U.S. Securities Act.

Idorsia Ltd intends to use the net proceeds from the offering to accelerate QUVIVIQ’s commercial trajectory, to advance its pipeline, to strengthen its balance sheet, and for general corporate purposes.

J.P. Morgan and UBS are acting as Joint Bookrunners and Global Coordinators, and H.C. Wainwright & Co. is acting as Lead Manager in connection with the offering.

The Homburger team was led by Frank Gerhard (Corporate / M&A) and included Lorenzo Togni (Capital Markets), Estelle Piccard, Lucas Forrer, Anina Preusker and Jannis Zafeirakos (all Corporate / M&A) as well as Stefan Oesterhelt (Tax).