Auditor in
Olten

20 companies in Auditor based in Olten — name and year of registration from the commercial register. The list below shows them all.

Companies

All 20 companies in Olten

Gribi & Partner AG Logo

Gribi & Partner AG

Since 1990 · 11–20 empl.4.3(6)

Gribi & Partner AG is an owner-managed advisory and fiduciary firm serving businesses, individuals and institutions. Its services include auditing, tax and VAT consulting, bookkeeping, financial and payroll accounting, business consulting, succession planning and company valuations.

Management consultantTax advisoryAuditFiduciary & business consulting
ranQ Trust Score 4.2 out of 5.0, rated Very high, Rank #1
emas Treuhand GmbH Logo

emas Treuhand GmbH

Since 2021 · 1–10 empl.5.0(12)

emas Treuhand GmbH is an independent fiduciary services firm serving small and medium-sized businesses and private individuals. Its services include accounting and annual financial statements, payroll accounting, tax returns, limited audits, business consulting, company valuations and succession planning.

AuditorBookkeepingTaxesFinancial Audit
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #2
Solidis Revisions AG Logo

Solidis Revisions AG

Since 1976 · 11–20 empl.

Solidis Revisions AG is an auditing and fiduciary services firm offering audits and tax advice. Its services also include financial accounting, personnel administration, corporate consulting and other fiduciary services for businesses, pension funds, municipalities, non-profit organizations and individuals.

AuditorFinancial auditingTax servicesFiduciary services
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #3
HTO Treuhand AG Logo

HTO Treuhand AG

Since 1980 · 11–20 empl.

HTO Treuhand AG is a fiduciary and audit firm. Its services include business and tax advisory, financial and payroll accounting, and auditing. It also provides debt collection, estate partition and executor services.

AuditorBusiness consultingTax consultingBookkeeping and accounting
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #4
TRESO Treuhand AG Logo

TRESO Treuhand AG

Since 1990 · 11–20 empl.

TRESO Treuhand AG provides fiduciary, audit, tax and accounting services. Its work includes financial statement advice, business succession, audits, national and international tax consulting, payroll accounting and accounting outsourcing.

AuditorTrust servicesAuditsTax services
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #5
Emmenegger Fides AG Logo

Emmenegger Fides AG

Since 1992 · 11–20 empl.

Emmenegger Fides AG is a fiduciary and business advisory firm serving companies and individuals. Its services include bookkeeping and financial statement advisory, auditing, tax advice and business consulting, including support with succession planning, financial planning and restructuring.

AuditorBookkeeping and closing adviceAuditingTax advisory
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #6
Forensis Treuhand AG Logo

Forensis Treuhand AG

Since 2001 · 11–20 empl.

Forensis Treuhand AG provides tax, fiduciary, business advisory and audit services. Its services include tax advice for companies and individuals, accounting, payroll and personnel administration, and advice on business formations and restructurings.

Management consultantTax advisoryFiduciary servicesBusiness consulting
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #7
Otto Treuhand AG Logo

Otto Treuhand AG

Since 2006 · 1–10 empl.4.4(7)

Otto Treuhand AG provides fiduciary services in taxation, accounting and controlling, business consulting, and auditing. Its services include tax returns, financial and payroll accounting, financial planning, support with company formations and restructurings, and business valuations.

AuditorAccounting and controllingTaxesBusiness consulting
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #8
BDO AG Logo

BDO AG

Since 2010 · 1–10 empl.

BDO AG is an audit, fiduciary and consulting firm. Its services include auditing, tax and legal advice, financial services, business consulting and digital solutions.

Management consultantFinancial auditTrust servicesTax advisory
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #9
Hubeli Treuhand GmbH Logo

Hubeli Treuhand GmbH

Since 2014 · 1–10 empl.

Hubeli Treuhand GmbH is an independent fiduciary firm providing accounting, tax advisory, auditing and business consulting services. Its work includes financial and payroll accounting, tax returns, annual financial statement audits, and advice on company formation and succession planning.

AuditorFiduciary servicesTax advisoryAuditing
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #10
Z83 AG Logo

Z83 AG

Since 2020 · 21–50 empl.

Z83 AG provides fiduciary services for businesses, including accounting, payroll, VAT, tax returns and annual financial statements. Its services also include CFO support, tax advisory, auditing and IT consulting for financial processes, ERP systems and integrations.

AuditorFiduciary ServicesCFO ServiceTax Advisory
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #11
Oltreu GmbH Logo

Oltreu GmbH

Since 2019 · 1–10 empl.

Oltreu GmbH is a fiduciary and audit firm providing financial audits, bookkeeping, financial statement preparation and advice, and tax services. It also advises businesses and individuals on matters including financial planning, company formation and succession.

Management consultantAudit and AssuranceBusiness ConsultingAccounting Services
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #12
Acta-Treuhand AG Logo

Acta-Treuhand AG

Since 1964 · 1–10 empl.4.0(10)

Acta-Treuhand AG provides fiduciary services in bookkeeping, payroll administration, taxation and auditing. Its services also include business consulting, financial and business plans, and support with company formation, succession planning and business transactions.

AuditorAccountingAdvisoryTaxes
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #13
Solidis Treuhand AG Logo

Solidis Treuhand AG

Since 1971 · 11–20 empl.4.0(4)

Solidis Treuhand AG provides fiduciary and business services, including auditing, tax advice and corporate consulting. Its services also cover accounting, personnel administration, outsourcing of administrative tasks and real estate matters.

Management consultantFiduciary servicesTax advisoryAuditing
ranQ Trust Score 4.0 out of 5.0, rated High, Rank #14
Conz Treuhand AG Logo

Conz Treuhand AG

Since 1987 · 11–20 empl.4.0(4)

Conz Treuhand AG provides auditing, tax advisory and accounting services. Its activities also include payroll administration, business consulting and fiduciary services, as well as the management, valuation and brokerage of real estate.

AuditorFinancial AuditingTax ConsultingAccounting
ranQ Trust Score 3.9 out of 5.0, rated High, Rank #15
TU

Treuhand und Revisionen Bruno Gervasoni Dipl. Buchhalter/Controller

Since 1987 · 1–10 empl.

Management consultant
No score yet
GA

Gastroconsult AG

Since 1997 · 1–10 empl.

Management consultant
No score yet
RG

ReviCare GmbH

Since 2001 · 1–10 empl.

Auditor
No score yet
KT

KMU Treuhand und Revisions AG

Since 2008 · 1–10 empl.

Management consultant
No score yet
MH

marc hert Consulting Wirtschaftsprüfung GmbH

Since 2008 · 1–10 empl.

Auditor
No score yet

Auditor in Olten

20AuditorCommercial register (Zefix) · as of November 15, 2026
2001Median year of registrationCommercial register (Zefix) · as of November 15, 2026
62in the Canton of SolothurnCommercial register (Zefix) · as of November 15, 2026
2,530in SwitzerlandCommercial register (Zefix) · as of November 15, 2026
Locations

Auditor in the region

Point size by number of companies per place.

Source: commercial register (Zefix) · as of November 15, 2026

Largest places

Solothurn13