Güreli YMM A.Ş.

What Güreli YMM A.Ş. does

Güreli Yeminli Mali Müşavirlik ve Bağımsız Denetim Hizmetleri A.Ş. — operating commercially as Baker Tilly Güreli — is a privately held Turkish professional services firm headquartered in Istanbul (Spine Tower and Maslak offices, Sarıyer district). The company delivers a comprehensive suite of audit, tax, and advisory services to corporate clients across multiple regulated sectors, including independent audit (KGK, SPK, BDDK, EPDK-authorized), tax attestation and advisory, VAT refund services, corporate finance advisory (M&A, valuations, financing), information systems audit, Special Integrator IT audits (Treasury/Revenue Administration scope), sustainability assurance, and KVKK personal data protection compliance. It is the Turkish member firm of Baker Tilly International, providing access to a $6.8 billion global network across 147+ regions, and in November 2025 became PCAOB-registered, enabling audit work for entities subject to US securities regulation.

The business operates a traditional professional services model: revenue is generated from project-based and retainer engagements priced via customized proposals rather than public rate cards, with a sales-led GTM motion driven by direct client relationships, professional referrals, website inquiry, and Baker Tilly network cross-border leads. Customer segmentation is horizontal, targeting corporates across banking, capital markets, energy, and general commerce — all anchored by recurring regulatory compliance requirements. The firm is family-owned (Güreli family), led by Chairman A. Hüsnü Güreli, with a deep bench of Yeminli Mali Müşavir (Sworn Financial Advisor) partners and credentialed directors. Marketing is reputation-driven through tax circulars, press appearances, and seminars rather than performance marketing.

Technology is not a differentiator — the firm operates without disclosed proprietary platforms, AI/ML systems, APIs, or product launches of a software nature. Its defensibility rests entirely on multi-regulatory authorizations, partner credentials (notably ACCA Gold Level Employer status), and the Baker Tilly brand affiliation rather than on technology stack or automation. No M&A, external funding, or inorganic growth transactions are disclosed; the company has no subsidiaries and is concentrated in a single Istanbul geography.

Name

Güreli YMM A.Ş.

Legal name

Güreli Yeminli Mali Müşavirlik ve Bağımsız Denetim Hizmetleri A.Ş.

Website

https://gureli.com.tr

Company type

Private

Founded year

1984

Operating status

Operating

Headcount range

101–250 employees

Short description

Güreli YMM A.Ş. (Baker Tilly Güreli) is a family-owned Istanbul-based Turkish audit, tax, and advisory firm serving regulated corporate clients across banking, capital markets, energy, and commerce. As the Turkish member of Baker Tilly International, it holds KGK, SPK, BDDK, EPDK, and PCAOB authorizations.

Ownership category

akta.pro rank

Product category

Audit and Assurance Services

NAICS

Accounting, Tax Preparation, Bookkeeping, and Payroll Services (54121), Offices of Certified Public Accountants (541211)

SIC

Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Audit Management, Controls & SOX Compliance (BPAEAPAH)

akta.pro secondary industry

Third-Party Risk, Vendor Due Diligence & Supply Chain Compliance (BPAEAPAG)

Keywords

• Independent audit services
• Tax advisory consulting
• Sustainability audit services
• Corporate finance advisory
• Information systems audit

Headquarters

HQ city

Sariyer

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Professional Services (Audit, Tax, Consulting): Revenue generated from providing professional services including independent audit, tax consultancy, attestation, information systems audit, corporate finance, VAT refund services, sustainability auditing, and personal data protection compliance services. Services are typically billed on a project or retainer basis for ongoing client relationships.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Güreli YMM A.Ş. is a Turkish Yeminli Mali Müşavirlik firm delivering independent audit, tax advisory, attestation, corporate finance, information systems audit, VAT refund, sustainability audit, and personal data protection (KVKK) compliance services to corporate clients. Operating under the Baker Tilly International network, the firm holds multi-sector regulatory authorizations (KGK, SPK, BDDK, EPDK, Hazine insurance, PCAOB) that allow it to serve listed, banking, energy, and other regulated entities across Turkey.

Product overview

Güreli YMM A.Ş. is a professional services firm operating under the Baker Tilly International network, offering a comprehensive suite of audit, tax advisory, and consulting services. The portfolio includes: Attestation Services, Tax Advisory Services, Independent Audit Services (with KGK, SPK, BDDK, EPDK and Treasury audit authority), Information Systems Audit Services (including Special Integrator Organizations audit), Corporate Finance Services, VAT Refund Services, Sustainability Audit Services (one of the first six firms authorized by KGK), and Personal Data Protection (KVKK) Services. The firm also publishes tax circulars (Vergi Sirkülerleri) and operates under the Baker Tilly Güreli brand.

Differentiator

Problem solved

Functional benefit

Products and services

• Bağımsız Denetim Hizmetleri (Independent Audit Services) Independent audit services for companies' financial information conducted under KGK (Public Oversight Authority), SPK (Capital Markets Board), BDDK (Banking Regulation and Supervision Agency), EPDK (Energy Market Regulatory Authority), and Hazine (Treasury) insurance audit authorities. For Turkish corporates, listed companies, banks, and energy entities requiring regulator-mandated audits.
• Vergi Danışmanlığı Hizmetleri (Tax Advisory Services) Tax consultancy services delivered by experienced Güreli staff with expertise across different tax products and sectors, covering Turkish corporate tax, VAT, and tax optimization strategies. For Turkish businesses facing complex tax legislation.
• Tasdik Hizmetleri (Attestation Services) Attestation services including corporate income tax and income tax annual returns, VAT declarations, and related filings for Turkish businesses requiring sworn financial advisor sign-off.
• Bilgi Sistemleri Denetim Hizmeti (Information Systems Audit) IT process and system audits evaluating compliance of business applications and IT infrastructure with regulations, standards, and best practices. For Turkish organizations requiring IT audit assurance.
• Özel Entegratör Kuruluşları Bilgi Sistemleri Denetimi (Special Integrator Organizations Information Systems Audit) Information systems audit for e-Document Special Integrators as outlined by the Ministry of Treasury and Finance, Revenue Administration. For Turkish e-Document Special Integrator entities.
• Kurumsal Finansman Hizmetleri (Corporate Finance Services) Advisory services on company mergers and acquisitions, debt and equity financing, and company valuation. For Turkish corporates pursuing transactions and financing.
• KDV İadesi Hizmeti (VAT Refund Service) VAT refund services for eligible transactions and exports. For Turkish businesses seeking VAT recovery including exporters and companies with eligible VAT transactions.
• Sürdürülebilirlik Denetim Hizmetleri (Sustainability Audit Services) Sustainability audit services; Güreli is one of the first six audit firms authorized by KGK (Public Oversight Authority) in Turkey for sustainability auditing. For Turkish entities subject to sustainability assurance requirements.
• Kişisel Verilerin Korunması Hizmeti (Personal Data Protection Service / KVKK) Compliance services related to Law No. 6698 on Protection of Personal Data (KVKK) effective since April 7, 2016. For Turkish data controllers and processors subject to KVKK.

Segments2 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• Baker Tilly InternationalcoreStrategic or Co-development PartnerGüreli is the Turkish member firm of Baker Tilly International, a global network of independent accounting and advisory firms. The partnership provides access to international expertise, cross-border client services, and the Baker Tilly brand name. Baker Tilly International operates in 147+ regions with $6.8 billion in combined firm value.

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• RSM Turkey: RSM's Turkish member firm is a direct peer — another global mid-tier accounting network offering audit, tax, and consulting services to Turkish corporates. Similar positioning to Güreli in the mid-tier segment competing with Big 4 firms.
• Grant Thornton Turkey: Grant Thornton's Turkish member firm is a direct peer — global mid-tier accounting network providing audit, tax, and advisory services to Turkish corporates. Competes head-to-head with Güreli for mid-market and large-cap audit mandates under comparable regulatory authorizations.
• Baker Tilly US: Baker Tilly US is the flagship and largest member of the Güreli-affiliated Baker Tilly International network. Provides direct comparability on service mix, regulatory authorization model (PCAOB registered), and cross-border referral mechanics — Güreli's network affiliation positions it as the Turkish counterpart for US-bound and US-sourced engagements.
• Baker Tilly UK: Baker Tilly UK is a network peer within the same Baker Tilly International affiliation. Comparable mid-tier audit and advisory firm in another major market, with similar service portfolio and cross-border referral relationship to Güreli.
• BDO Turkey (BDO Denetim): BDO's Turkish member firm is a direct peer — mid-tier global accounting network with similar audit, tax, and advisory offerings targeting Turkish corporates and regulated entities. Operates under analogous multi-regulator authorization model and competes for the same client segments as Güreli.
• Mazars Turkey (Forvis Mazars): Forvis Mazars' Turkish member firm is a direct peer — international accounting and advisory network competing in Turkish audit, tax, and consulting markets. Similar mid-tier positioning with global network affiliation, competing for the same regulated-entity clients.

Broad incumbents

• KPMG Turkey: KPMG Turkey is a broad incumbent in the same Turkish audit and advisory market. While Big 4 firms target larger enterprises, KPMG competes for many of the same regulated audit mandates (KGK, SPK, BDDK) that Güreli serves, typically at the upper end of the market.
• Deloitte Turkey: Deloitte Turkey is a broad incumbent — Big 4 firm providing audit, tax, consulting, and financial advisory services across Turkey. Competes with Güreli for mid-to-large-cap audit and advisory mandates, particularly in regulated sectors.
• EY Turkey (Ernst & Young): EY Turkey is a broad incumbent — one of the Big 4 operating across audit, tax, and advisory in Turkey. Competes with Güreli for large-cap and regulated-entity audit engagements under the same Turkish regulatory framework.
• PwC Turkey: PwC Turkey is a broad incumbent — Big 4 firm offering audit, tax, and consulting services across Turkey. Overlaps with Güreli in regulated audit work (KGK, SPK, BDDK, EPDK) and large corporate engagements.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/GureliYMMAS
• LinkedInlinkedin.com/company/gureliymmas

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Güreli YMM A.Ş.