AUM
Estimated $3B+ (based on Sonova stake)
Principals
2
Principal Net Worth
$2.6B
Data Flags
Wealth from hearing aid industry; operates through Sonova stake
Diethelm Family Office
SFOHigh ConfidenceZurich, Switzerland
Last verified: Jan 17, 2026
Details
- Website
- Unknown
- Source of Wealth
- Healthcare (Hearing Aids - Sonova)
- Assets Under Management
- Estimated $3B+ (based on Sonova stake)
- Source File
- research/organizations/diethelm-family-office.md
- UID
- fo-diethelm-family-office
Also Known As
Beda Diethelm Family OfficeDiethelm Capital
Principals (2)
Team Members (6)
Related Entities (1)
Relationship Strength
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Sources (6)
- https://www.forbes.com/profile/beda-diethelm/
- https://www.bilan.ch/story/classement-les-300-plus-grandes-fortunes-de-suisse-342217367665
- https://report.sonova.com/2025/downloads/en/06_Sonova_AR_24-25_CorpGov_en.pdf
- https://report.sonova.com/2025/downloads/en/01_Sonova_AR_24-25_Full_Report_en.pdf
- https://www.sonova.com/sites/default/files/2025-06/02_Sonova_AR_24-25_Business_Report_en.pdf
- https://en.wikipedia.org/wiki/Sonova
Changelog
- 2026-01-17Upgraded to High confidence - dual net worth sources (Forbes $2.6B, Bilan CHF 2.5-3.5B); added Sonova FY2024/25 financials, 11.26% stake details
- 2026-01-16Enriched with Sonova shareholding details, 2014 billionaire status, Phonak brand, ETH Foundation philanthropy
- 2026-01-15Auto-generated from principal Beda Diethelm