Ownership: Listed (SIX Swiss Exchange). Stäfa, Switzerland since 1947.
Employees: ~17,000
Key products: Phonak, Unitron, Hansaton hearing aids; Sennheiser consumer audio (acquired 2022); Advanced Bionics cochlear implants
Key markets: Global — hearing aids in 100+ countries via clinical channels
Known for: World's largest hearing-aid maker by revenue. Acquired Sennheiser's consumer audio business in 2022 — a deliberate move into the consumer hearables/over-the-counter hearing-device category that's reshaping the industry.