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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryFinance & InsuranceFiduciary OfficesBaselATAG Swiss Trustees AG
ATAG Swiss Trustees AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of ATAG Swiss Trustees AG is the provision of services in the field of trust management, legal advice, tax advice, asset management and corporate structuring. This includes, in particular, the establishment and administration of trusts, representation of clients before authorities, structuring of assets, estate planning and the preparation of wills. The company offers its clients comprehensive care and advice in all legal and tax matters.

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Products & services

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ATAG Swiss Trustees AG

✓ Offered11
Trusteeship
Establishment and ongoing management of trusts, administration of assets and structures, and implementation of cross-border succession arrangements.
Estate planning and will executorship
Estate planning, wills and will executorship for business families and international clients.
Asset protection and wealth structuring
Protection and structuring of assets, asset protection, holding structures and long-term administration of wealth structures.
Tax advisory
Advisory services in all tax matters, including tax advice related to assets, structures and transactions.
Legal advice and transaction implementation
Law firm mandates, legal advice and implementation of transactions for private and business matters.
Business structuring
Structuring of companies, financial strategies and support for financial transactions.
Representation before authorities
Representation before authorities and assistance with regulatory and administrative proceedings.
Outsourcing of legal departments
Assumption of tasks for outsourced legal departments for partners and client companies.
Philanthropic administration
Administration of philanthropic structures and related asset and organisational tasks.
Administration of special assets
Administration of art and jewellery collections, as well as yachts and aircraft.
Immigration and relocation
Advice and support for immigration and relocation in the context of international mandates.
Trust & reputation

ranQ Trust Score of ATAG Swiss Trustees AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

ATAG Swiss Trustees AG has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
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CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
ATAG Swiss Trustees AG scores 85.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
ATAG Swiss Trustees AG scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).83.322%
ATAG Swiss Trustees AG scores 2.3 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.2.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

ATAG Swiss Trustees AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

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Location

St. Jakobs-Strasse 17
4052 Basel

At a glance

Legal form
Corporation
UID
CHE-102.749.977
Founded
1945 · 81 years
Last commercial register change
August 5, 2025
Employees
1 to 10
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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