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Shareholder structure

As of March 31, 2024 the shareholdings of registered shareholders were distributed as follows:

Registered shareholders

Number of sharesRegistered shareholders 31.3.2024Registered shareholders 31.3.2023
Total registered shareholders26,49428,446

Significant shareholders

 No. of shares in %No. of shares in %
Beda Diethelm and Annamaria Diethelm-Pandiani3)6,712,87811.266,712,87810.98
Family of Hans-Ueli Rihs3)4)3,683,6496.183,683,6496.02
BlackRock, Inc.3,334,2935.103,334,2935.10
MFS Investment Management5)1,847,4153.021,847,4153.02
UBS Fund Management (Switzerland) AG1,825,4533.06n/a<3

1) Or at last reported date if shareholdings are not registered in the share register. 

2) On the basis of the shares registered in the commercial register at last reported date. 

3) Beda Diethelm and Hans-Ueli Rihs were already shareholders before the Initial Public Offering in November 1994. There are no shareholders’ agreements among these individuals and they can trade freely.

4) Hans-Ulrich Rihs, Gabriela Rihs and Stefan Rihs as a group jointly control 3,683,649 registered shares (corresponding to 6.18% of total Sonova share capital) pursuant to the last disclosure notice. These shares were previously controlled by Hans-Ulrich Rihs as a single shareholder.

5) MFS Investment Management, formerly known as Massachusetts Financial Services, is held by Sun Life Financial Inc which is traded on the TSX, NYSE and PSE (ticker symbol SLF)

Information on shareholders of Sonova Holding AG who reported shareholdings of more than 3% or a reduction of shareholdings below 3% in the financial year 2023/24 can be found on the website of the Disclosure Office of the SIX Swiss Exchange.


Sonova Holding AG has no cross-shareholdings with other companies.