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Billionaire Profile
Beda Diethelm
Global Rank
#1640

Beda Diethelm

CEO, Hearing aids
Zurich, Switzerland
Real-Time Net Worth
$2.56B
Estimated based on Hearing aids stock value as of September 10, 2026
-1.22% (24h)
Age
85
Source
Hearing aids
Industry
Manufacturing
Citizenship
Switzerland

Biography

Beda Diethelm, a Swiss billionaire, is the largest individual shareholder of Sonova Holding AG, a leading manufacturer of hearing aids and related products. Born in 1941, Diethelm's career began with an apprenticeship in electronics. He later rose to become head of production and technical director at Bommer, a hearing aid supplier. Diethelm's significant stake in Sonova, which he joined in 1965, is the primary source of his wealth. Sonova has annual sales of billions of dollars.

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Data Updated
Sep 10, 2026
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Wealth Over Time

Net Worth History

YearNet Worth
2026$2.56B
2025$2.40B
2024$2.40B

Portfolio Holdings

Sonova Holding AG

Sonova Holding AG

SOONmanufacturing
$2.30B
Holdings Value
Ownership
11.26%
Market Cap
$14.6B
Stock Price
$177.5
Revenue
$3.87B
Stäfa, Switzerland
17,990 employees
Founded 1947

In-Depth Profile

Beda Diethelm's wealth is rooted in his profound engagement with the hearing aid industry, particularly through his substantial ownership in Sonova Holding AG, a global leader in the manufacturing of hearing aids and related products. His career began with a foundational apprenticeship in electronics, a path that laid the groundwork for his future contributions to a specialized technological field. This early training provided him with practical skills in a rapidly evolving sector, which would prove crucial as he advanced within the industry.

Diethelm's professional ascent began in earnest when he assumed the role of head of production and technical director at Bommer, a Zurich-based company specializing in hearing aid supply. This position, which he held in the early nineteen-sixties, placed him at the heart of the operational and technical aspects of hearing aid manufacturing. It was a critical juncture where he gained hands-on experience in the intricacies of production and technical oversight for a global supplier. His time at Bommer provided him with an in-depth understanding of the product development cycle and the demands of international distribution within the medical device sector.

A significant turning point in Diethelm's career came in the mid-nineteen-sixties when he joined the company that would later evolve into Sonova. His involvement with the organization deepened over time, culminating in him receiving a stake in the company in the early nineteen-eighties. This ownership stake proved to be the primary engine of his accumulating wealth. Sonova, under its various iterations, expanded its operations and market presence, establishing itself as a dominant force in the global hearing solutions market. The company's focus on innovation and its wide array of products, including hearing aids and cochlear implants, have contributed to its multi-billion-dollar annual sales.

Diethelm's wealth is directly tied to his position as the largest individual shareholder of Sonova Holding AG. His long-term investment and sustained commitment to the company have allowed him to benefit significantly from its growth and financial success. Sonova designs, develops, manufactures, and distributes a comprehensive portfolio of hearing care solutions, catering to individuals with varying degrees of hearing loss. The company's products are sold worldwide, solidifying its position as a key player in an essential healthcare sector. Diethelm's journey, from an electronics apprentice to a significant shareholder in a leading manufacturing company, illustrates a career deeply intertwined with the development and expansion of the hearing aid industry.

Career Milestones

1962

Head of Production and Technical Director

Beda Diethelm became the head of production and technical director of Bommer, a Zurich-based global supplier of hearing aids.

1965

Joined Sonova (then AG für Elektroakustik)

Diethelm joined the company that would later become Sonova.

1980

Received Stake in Sonova

Diethelm received a stake in the company.

Billionaires Connected to Beda Diethelm

Peers in Manufacturing

All Manufacturing billionaires

Richest in Switzerland

All billionaires from Switzerland

Adjacent Global Ranks

Full global ranking

Frequently Asked Questions

What is Beda Diethelm's net worth in 2026?
As of 2026, Beda Diethelm's estimated net worth is $2.558 billion, ranking #1640 among the world's billionaires. The estimate is based on publicly available shareholding data and market prices, updated daily.
How did Beda Diethelm make their money?
Beda Diethelm's wealth primarily comes from Hearing aids, most notably through Hearing aids.
Where is Beda Diethelm from?
Beda Diethelm is from Switzerland.
How old is Beda Diethelm?
Beda Diethelm is 85 years old.

Sources & References

  1. Beda Diethelm — Forbes profile Forbes