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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryFinance & InsuranceFiduciary OfficesZugDr. Sieberth Treuhand AG
Dr. Sieberth Treuhand AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The company's core activity is wealth management and trust services, including services such as auditing, tax consulting, legal and corporate consulting, as well as the provision of domiciliary and secretarial services.

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Offering

Products & services

Industry:Fiduciary Offices
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4.1/5

Dr. Sieberth Treuhand AG

✓ Offered7
Company Formation and Restructuring
Company formation with tax and legal advice, support in business setup, and advice on restructurings, mergers, conversions, spin-offs and asset transfers.
Tax Advisory
Advice on Swiss and international tax matters for companies and private clients, tax representation, tax returns, VAT statements, and tax opinions and model calculations.
Accounting
Setup and maintenance of bookkeeping, financial and securities accounting, payroll and cost accounting, annual accounts, receivables and payables management, and payment processing.
Audit Services
Acceptance of audit mandates and performance of special audits for companies and other assignments in the audit area.
Registered Office and Secretariat Services
Registered office provision for companies, invoicing, telephone, email and fax secretarial support, correspondence, and dealings with banks and authorities.
Corporate Mandates
Performance of board, executive management and other fiduciary mandates for companies and clients.
Legal and Business Advisory
Business planning with business plans, budgets and financial plans, plus advice on mergers, valuations, acquisitions and sales, succession, contracts and real estate.
Trust & reputation

ranQ Trust Score of Dr. Sieberth Treuhand AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Dr. Sieberth Treuhand 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.
x
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%
Dr. Sieberth Treuhand 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%
Dr. Sieberth Treuhand AG scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
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%
Dr. Sieberth Treuhand AG scores 0.6 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
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 35.0.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Dr. Sieberth Treuhand 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

Poststrasse 13
6300 Zug

At a glance

Legal form
Corporation
UID
CHE-100.274.590
Founded
1984 · 42 years
Last commercial register change
September 14, 2026
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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