Who is IONOS?
IONOS is a German hosting and cloud provider for small and medium businesses, run by IONOS SE in Montabaur. Its holding company, IONOS Group SE, has been listed on the Frankfurt Stock Exchange since February 2023 and is majority-owned by United Internet. Sedo and STRATO belong to the same group.
- What it is
- Web hosting, Domain registrar, DNS provider
- Operated by
- IONOS SE
- Based in
- Montabaur, Germany
- Listed
- Frankfurt Stock Exchange (IOS), since February 2023
- Part of
- United Internet (63.8% of IONOS Group SE)
- ICANN accreditation
- Yes, IANA ID 83
- Website
- ionos.com
Who owns IONOS?
United Internet AG holds a majority of IONOS Group SE, 63.8% of its shares as of September 2025; the rest trades freely on the Frankfurt Stock Exchange.
IONOS in axath Analytics
Analytics reads the zone files of more than 350 extensions every day and shows which providers gain and lose names, including IONOS.
Open AnalyticsSources
- IONOS Group: final offer price for IPO (2023)
- IONOS Group: interim statement Q3 2025
- IANA: Registrar IDs (ICANN-accredited registrars)
Last reviewed October 9, 2026.