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.
- 1Gruber Partner AG · Aarau
Gruber Partner AG provides services in auditing, fiduciary services, and business consulting. Their auditing services include statutory audits, limite…
- 2Saxer 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…
- 3DW 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-…
- 4Hüsser 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,…
- 5Schwager 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…
- 6ATG Treuhand & Consulting GmbH · Reinach AG
ATG Treuhand & Consulting GmbH provides a range of fiduciary services including financial and payroll accounting, business consulting, tax declaration…
- 7primetrust AG · Suhr
primetrust AG provides a digital fiduciary solution aimed at optimizing accounting processes for businesses, particularly in the health sector and tra…
Search all 718 fiduciary & trust companies — with size, revenue and ownership
Search now →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.