What Zepos & Yannopoulos does

Zepos & Yannopoulos (branded "ZEYA") is a Greek law firm founded in 1893 and headquartered in Athens (Halandri, 280 Kifissias Avenue). It is organized as an incorporated partnership of lawyers under Greek law (regulated by Presidential Decree 81/2005 and Law 4194/2013) and operates without external investors, parent entities, or subsidiaries. With 101-250 employees, it is one of Greece's oldest continuously operating law firms, serving primarily large corporations and multinationals (domestic and cross-border) engaged in M&A, capital markets, project finance, energy, banking, and regulatory matters, alongside a secondary segment of high-net-worth individuals and family offices seeking private wealth, relocation, and succession planning.

The firm runs a full-service practice covering Antitrust & Competition, Capital Markets & Financial Services Regulation, Corporate & Compliance, Data Protection & Cybersecurity, Employment, Finance, Litigation & Arbitration, M&A and Project Development, Private Clients, Public Procurement, Real Estate, Restructuring & Insolvency, and Tax & Accounting. There is no proprietary technology platform; the offering is bespoke legal advisory delivered through a partner-led model, with deal teams observed on marquee mandates such as a €400 million senior notes offering for Motor Oil (Hellas), €58 million EIF-backed fund formation for Sporos Platform, and renewable-energy M&A for MORE / Unagi / PPC Renewables.

Revenue is generated from professional services fees — primarily time-based hourly rates and fixed fees per matter — sourced across diversified corporate, capital markets, tax, litigation, and private-client work. The firm has no publicly disclosed revenue. Go-to-market is partner-led, anchored in Chambers, Legal 500, and ITR rankings, supported by extensive thought-leadership output (newsletters across ~20 practice and industry areas, contributions to ICLG and Lexology guides, client events such as the Energy & Finance Breakfast), and a website (zeya.com) that drives top-of-funnel inbound. Distribution is direct partner-to-client, with referral networks and industry presence underwriting client acquisition.

Name

Zepos & Yannopoulos

Legal name

Zepos & Yannopoulos

Website

https://zeya.com

Company type

Private

Founded year

1893

Operating status

Operating

Headcount range

101–250 employees

Short description

Zepos & Yannopoulos (ZEYA) is an Athens-headquartered Greek law firm founded in 1893 serving large corporations, financial institutions, and high-net-worth individuals with a full-service practice spanning M&A, capital markets, tax, litigation, private wealth, and energy law across Greek and EU regulatory frameworks.

Ownership category

akta.pro rank

Product category

Legal Services

NAICS

Offices of Lawyers (541110)

SIC

Services-Legal Services (8111)

akta.pro primary industry

Mergers & Acquisitions (M&A) & Securities Law (BPAHAAAI)

akta.pro secondary industries

M&A Advisory (Buy-side/Sell-side) (BPAHADAC), Transaction Services (Financial, Tax & Commercial Due Diligence) (BPAHAOAB), Bankruptcy, Restructuring & Insolvency Law (BPAHAAAH)

Keywords

• Legal advisory services
• Corporate law services
• Mergers and acquisitions
• Tax and accounting
• Private wealth planning

Headquarters

HQ city

Athens

HQ country

Greece

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Legal Advisory Services: Professional services fees generated from providing legal counsel across transactional, advisory, and litigation matters to corporate and individual clients. Revenue is primarily time-based (hourly rates) or fixed-fee for specific engagements, sourced from diverse practice areas including M&A, capital markets, tax, finance, energy, and private wealth.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Zepos & Yannopoulos is a Greek law firm providing comprehensive legal advisory services across more than a dozen practice areas including M&A and project development, capital markets, corporate and commercial law, tax and accounting, litigation and arbitration, finance, private wealth, antitrust & competition, employment, data protection, real estate, and restructuring. The firm serves domestic and international corporations, financial institutions, energy companies, high-net-worth individuals, and investment fund managers with transactional, advisory, and contentious legal counsel under Greek and EU regulatory frameworks.

Product overview

Zepos & Yannopoulos (ZEYA) is a Greek law firm established in 1893, providing comprehensive legal services across multiple practice areas including Antitrust & Competition, Capital Markets & Financial Services Regulation, Corporate Law & Compliance, Data Protection & Cybersecurity, Employment & Labour, Finance, Litigation & Arbitration, M&A and Project Development, Private Clients, Public Procurement & Concessions, Real Estate, Restructuring & Insolvency, and Tax & Accounting. The firm also publishes newsletters covering legal developments in areas such as EU FDI screening, carried interest tax frameworks, binding tax rulings, and energy regulation. This is not a technology product company but a professional legal services firm.

Differentiator

Problem solved

Functional benefit

Products and services

• M&A and Project Development Legal advisory on mergers, acquisitions, joint ventures, and project development transactions for corporate clients across industries including energy and infrastructure.
• Capital Markets & Financial Services Regulation Legal counsel on capital markets transactions (debt and equity issuances) and financial services regulation for issuers, underwriters, and financial institutions.
• Corporate Law & Compliance General corporate advisory and compliance services for companies, including governance, contracts, and regulatory compliance.
• Tax & Accounting Corporate and international tax advisory, transfer pricing, tax controversy and litigation, tax compliance, and advisory on special tax regimes including the lump-sum tax regime, carried interest framework, and binding tax rulings.
• Litigation & Arbitration Contested dispute resolution services before Greek courts and arbitral tribunals, including tax litigation and commercial arbitration.
• Energy & Project Finance Legal advisory on energy project development, financing, regulation, and transactions in conventional and renewable energy, including storage and electricity market participation.
• Private Wealth & Family Office Services Estate planning, succession and inheritance planning, family office structuring, relocation tax regimes (lump-sum tax and retirees regimes), and wealth management advisory for HNW individuals and families.
• Antitrust & Competition EU and Greek competition law advisory, including merger control, antitrust investigations, foreign direct investment screening, and compliance.
• Finance (Banking, Project & Structured Finance) Legal advisory on banking, lending, project finance, structured finance, and securitization transactions for lenders, sponsors, and borrowers.
• Data Protection & Cybersecurity GDPR/data protection compliance, cybersecurity law, and breach advisory for corporate clients.
• Restructuring & Insolvency Legal advisory on corporate restructuring, reorganizations, and insolvency proceedings for companies, creditors, and investors.
• Real Estate Real estate legal advisory including acquisitions, dispositions, leasing, development, and related transactions.
• Employment & Labour Employment and labour law advisory, including contracts, terminations, reorganizations, and workplace compliance.
• Public Procurement & Concessions Public procurement and concessions advisory, including bid preparation, procurement disputes, and concession arrangements.

Quantifiable outcome

• Successful cancellation of approximately €2 million tax assessment before Dispute Resolution Committee
• +2 more outcomes

Named customers6 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators1 record

Recent moves6 records

Expansion highlights6 records

Direct peers

• Lambadarios Law Firm: Historic Greek law firm with a strong corporate, M&A, capital markets, and energy practice. Direct peer with similar enterprise client base and top-tier directory recognition.
• PotamitisVekris: Leading Greek law firm with strong practices in M&A, energy, project finance, and tax. Direct competitor for the same top-tier Greek corporate and energy clients as Z&Y.
• Papapolitis & Papapolitis: Athens-headquartered full-service Greek law firm with comparable practice breadth across M&A, banking, energy, and tax. Similar headcount tier and direct competitor for major Greek corporate clients.
• Your Legal Partners: Greek law firm with a comparable full-service offering including corporate/M&A, energy, tax, and dispute resolution. Direct peer competing for similar mid-cap and large-cap Greek mandates.
• Karatzas & Partners: One of the leading Greek full-service law firms with a strong M&A, capital markets, banking & finance, and energy practice. Directly comparable to Z&Y in scope, client base, and top-tier rankings in the Greek legal market.
• Bernitsas Law: Prominent Athens-based full-service law firm recognized for M&A, banking & finance, and capital markets work. Comparable peer in size, sophistication, and client roster of major Greek corporates.
• Kyriakides Georgopoulos (KG Law Firm): Top-tier Greek law firm with a similarly broad practice spanning M&A, energy, tax, and dispute resolution. Closely comparable in size, headcount, and Chambers/Legal 500 positioning to Z&Y.
• Politis & Partners: Greek law firm with a strong corporate, M&A, and energy practice. Comparable in size and client focus to Z&Y within the Greek market.

Broad incumbents

• Clifford Chance (Athens): Global Magic Circle firm with an established Athens office competing for the largest Greek M&A, capital markets, and project finance mandates. A broader incumbent that overlaps with Z&Y's transactional practice at the top end of the market.
• Linklaters (Athens): International Magic Circle firm with Greek capability serving cross-border M&A, capital markets, and finance transactions involving Greek clients. A broader incumbent that competes for premium cross-border mandates involving Greek targets.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles20 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 Zepos & Yannopoulos