On June 16, 2017, 107,330,210 Idorsia shares were listed on SIX. Furthermore, shares issued through the conversion of the first tranche of the convertible loan provided by Cilag Holding AG, an indirect subsidiary of Johnson & Johnson (CHF 135.4 million converting into 11,793,220 Idorsia shares (“Authorized Shares”) were listed on June 20, 2017.

On July 13, 2018 the Group privately placed 11,912,000 new registered shares of CHF 0.05 par value from existing authorized capital at CHF 25.62 per new share receiving gross proceeds of CHF 305 million through an accelerated book-building process. Concurrently to the private placement of new shares, the Group issued CHF 200 million of senior unsecured convertible bonds (“the Bonds”) on July 17, 2018. The Bonds mature on July 17, 2024 and are convertible into 5.9 million registered shares of the Group.

On May 20, 2020, the Group privately placed 11 million new registered shares of CHF 0.05 par value from existing authorized share capital at CHF 30 per new share receiving gross proceeds of CHF 330 million, by way of an accelerated book-building process.

On October 22, 2020, the Group issued 23.8 million new registered shares from existing authorized share capital at CHF 22.50 per new share receiving gross proceeds of CHF 535.5 million through an at-market rights offering. As a result of the capital increase, the share capital of Idorsia registered in the commercial register was increased from CHF 7,132,337.30 to CHF 8,322,337.30 divided into 166,446,746 registered shares with a nominal value of CHF 0.05 each.

On July 28, 2021, the Group placed CHF 600 million senior unsecured convertible bonds due 2028 convertible into 19.0 million shares of the Group.

Idorsia Ltd is part of the following indices: SPI, SPIEX, SPI ESG, SXSLI, SXI Life Sciences, SXI Bio+Medtech, and SSIRT.

Idorsia is traded under the following symbols: Reuters IDIA.S / Bloomberg IDIA:SW.

Key Share Data

As of September 30, 2021
Shares outstanding

167.4 million

Closing share price CHF 22.58
Market capitalization CHF 3.8 billion
52-week high CHF 29.76
52-week low CHF 20.34
YTD price change CHF -2.94 (-11.52%)
Average volume 362,618 shares
Free float 109.8 million shares

We will update this information quarterly.

Major Shareholders

As of September 30, 2021, the company has been notified of the following shareholdings or voting rights amounting to 3% or more of the company’s issued ordinary share capital:

Shareholder Position

Jean-Paul & Martine Clozel


Rudolf Maag




* Based on the share capital as of September 30, 2021

** As per the latest significant shareholder notifications available from the platform of the Disclosure Office of SIX Swiss Exchange

How To Buy Stock

Idorsia shares are traded on the SIX Swiss Stock Exchange. Investors wishing to become a shareholder in Idorsia should contact their local bank with the following information:

Reuters / Bloomberg: IDIA.S / IDIA:SW
Exchange: SIX, Switzerland
ISIN: CH0363463438
Swiss security number: 36 346 343

Bank staff will then be able to use this information to execute the transaction.

How To Register Shares

As part of our continued efforts towards good corporate governance we encourage shareholders to exercise their voting rights at the Annual General Meeting (AGM) of Idorsia Ltd.

The registration of shares is not mandatory under Swiss law. Therefore, registered shares are not automatically registered in our Share Register.

Idorsia has mandated areg.ch to administer its Share Register. Investors wishing to register their shares are kindly asked to contact their prime custodian (e.g. your banker or broker) to request a share registration form. After completing the form, your custodian will send it to areg.ch who will then take care of the registration. The custodian will receive a confirmation directly from areg.ch once the registration has taken place.