The Largest Fiduciary & Trust Companies in Aargau

Market overview · updated October 2026

718 fiduciary & trust companies are registered as active in Aargau. The market is highly fragmented: 84% of firms employ fewer than ten people, while only 1% have 50 or more. 110 firms (15%) were founded in the last five years. Most firms are based in Aarau, Baden, Lenzburg.

The largest fiduciary & trust companies in Aargau

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

  1. 1
    Gruber Partner AG · Aarau

    Gruber Partner AG provides services in auditing, fiduciary services, and business consulting. Their auditing services include statutory audits, limite…

  2. 2
    Saxer Treuhand AG Baden · Baden

    Saxer Treuhand AG Baden provides a range of services including fiduciary services, accounting, auditing, business consulting, and tax advisory. The fi…

  3. 3
    DW Treuhand AG · Moosleerau

    DW Treuhand AG provides a range of services including tax consulting, asset management, and business advisory for private clients and small to medium-…

  4. 4
    Hüsser Gmür + Partner AG · Dättwil AG

    Hüsser Gmür + Partner AG provides a range of services including auditing, tax consulting, and fiduciary services. They also offer business consulting,…

  5. 5
    Schwager GmbH Treuhand, Steuer- und Versicherungsberatung · Frick

    Schwager GmbH provides a range of services including tax consulting for individuals and corporations, bookkeeping, payroll administration, auditing, c…

  6. 6
    ATG Treuhand & Consulting GmbH · Reinach AG

    ATG Treuhand & Consulting GmbH provides a range of fiduciary services including financial and payroll accounting, business consulting, tax declaration…

  7. 7
    primetrust AG · Suhr

    primetrust AG provides a digital fiduciary solution aimed at optimizing accounting processes for businesses, particularly in the health sector and tra…

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Frequently asked questions

How many fiduciary & trust companies are there in Aargau?
There are currently 718 active fiduciary & trust companies registered in Aargau (source: Alpintel registry analysis).
Which are the largest fiduciary & trust companies in Aargau?
By estimated headcount, Gruber Partner AG, Saxer Treuhand AG Baden, DW Treuhand AG 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.

All profiled fiduciary & trust companies in Aargau

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