The Largest Fiduciary & Trust Companies in St. Gallen

Market overview · updated October 2026

730 fiduciary & trust companies are registered as active in St. Gallen. The market is highly fragmented: 87% of firms employ fewer than ten people, while only 1% have 50 or more. 91 firms (12%) were founded in the last five years. Most firms are based in St. Gallen, Wil SG, Gossau SG.

The largest fiduciary & trust companies in St. Gallen

Ordered by estimated headcount (Alpintel analysis). Detailed figures on each company profile.

  1. 1
    OBT AG · St. Gallen

    OBT AG provides fiduciary services, auditing, consulting, and IT services. Their offerings include trust management, financial auditing, and business …

  2. 2
    WIESER Wirtschaftsprüfung AG · St. Gallen

    WIESER Wirtschaftsprüfung AG provides a range of services including accounting from A to Z, tax services, employee administration, auditing, company s…

  3. 3
    steuerpartner ag Steuer- und Wirtschaftsberatung · St. Gallen

    steuerpartner ag provides a range of services including tax consulting, business consulting, and fiduciary services. They assist clients with comprehe…

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Frequently asked questions

How many fiduciary & trust companies are there in St. Gallen?
There are currently 730 active fiduciary & trust companies registered in St. Gallen (source: Alpintel registry analysis).
Which are the largest fiduciary & trust companies in St. Gallen?
By estimated headcount, OBT AG, WIESER Wirtschaftsprüfung AG, steuerpartner ag Steuer- und Wirtschaftsberatung are among the largest providers. The ordering is based on estimate bands, not exact figures.
How can I filter all fiduciary & trust companies by size and region?
Alpintel search covers all 710,000 Swiss companies with filters for industry, headcount, revenue, region and ownership.

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