News date: 25 March 2026
The Legal 500 – EMEA 2026 ranks Ilyashev & Partners as Ukraine’s leading law firm. Following a comprehensive independent survey, Ilyashev & Partners received high ratings across all 12 practice areas evaluated in the Ukrainian market.
Ilyashev & Partners has secured the prestigious Tier 1 recognition in Dispute Resolution for the 14th consecutive year. This long-standing leadership reflects the firm’s deep expertise and the consistent trust of our international and domestic clients.
According to the results published on March 25, 2026, the following practice areas and experts have been recommended:
Competition – Tier 1
Leading Partners: Oleksandr Fefelov
Other Key Lawyers: Valeriia Gudiy, Alina Borovets
Ilyashev & Partners’ competition practice provides comprehensive antitrust support, including merger and concerted action clearances, as well as representation in unfair competition proceedings. The team is led by Oleksandr Fefelov, who is sought out for his expertise in antimonopoly regulation, PPP-related competition issues, and state aid matters. Valeriia Gudiy advises during regulatory inspections and administrative disputes, including matters involving regulated prices and tariffs. Alina Borovets is also recommended for her expertise in competition law.
Dispute Resolution – Tier 1
Hall of Fame: Mikhail Ilyashev, Roman Marchenko
Leading Associates: Oleh Trokhymchuk, Andrii Konoplia
Other Key Lawyers: Valeriia Gudiy, Sergey Nedelko
Ilyashev & Partners regularly participates in complex cross-border litigations involving two or more jurisdictions. Although the team’s main focus remains on traditional specialist areas of dispute resolution, such as tax litigation, debt collection, shareholder disputes, intellectual property, and real estate disputes, there has recently been a strong focus on domestic insurance disputes. Managing partner Mikhail Ilyashev handles high-profile, multi-jurisdictional mandates with a primary focus on energy and corporate disputes. Roman Marchenko leads international arbitrations. Oleh Trokhymchuk and Andrii Konoplia jointly lead the dispute resolution practice, providing expertise in banking and energy mandates, as well as bankruptcy procedures.
International Trade – Tier 1
Leading Partners: Olena Omelchenko
Ilyashev & Partners advises on trade remedies, export controls, customs compliance, sanctions, and trade-preference arrangements, with a strong recent focus on anti-dumping work. The team represents major Ukrainian and international industrial producers, exporters, and importers in complex investigations. Olena Omelchenko, head of the international trade practice and a ‘loyal and dependable partner’, is highly regarded for her success in anti-dumping, safeguard, and anti-subsidy cases for well-known domestic and international clients.
Banking, Finance and Capital Markets – Tier 2
Practice Head: Mikhail Ilyashev
Other Key Lawyers: Roman Marchenko
Ilyashev & Partners’ banking and finance team advises financial institutions and online payment sector clients on cross-border transactions, corporate governance, cryptocurrency operations, and licensing compliance. The practice is led by managing partner Mikhail Ilyashev, who routinely handles debt recovery, sales of unfinished property shares, and complex insurance mandates, while co-founder Roman Marchenko specialises in insolvency, financial restructuring, and distressed asset management.
Commercial, Corporate and M&A – Tier 2
Hall of Fame: Mikhail Ilyashev
Leading Partners: Roman Marchenko
Ilyashev & Partners’ ‘absolutely outstanding’ team advises both domestic and international clients on corporate governance frameworks, compliance programs, and anti-corruption audits. The practice is co-led by ‘exceptional leader’ Mikhail Ilyashev, who specialises in restitution, and Roman Marchenko, who has expertise in asset alienation matters. The group frequently conducts due diligence, document reviews, and risk assessments for its corporate clients.
Employment – Tier 2
Leading Partners: Valeriia Gudiy
Corporate clients turn to Ilyashev & Partners’ team for advisory support on transactional employment issues, staff outsourcing, and employee transfers and relocations. The practice is led by the ‘outstanding’ Valeriia Gudiy, who focuses on trade union and collective bargaining disputes, and regularly undertakes HR due diligence and corruption risk management assignments. The team also advises on confidentiality and IP protections, as well as non-compete matters, and is noted for its ‘mastery of every nuance’.
Energy – Tier 2
Practice Head: Mikhail Ilyashev
Other Key Lawyers: Roman Marchenko, Valeriia Gudiy
The scope of Ilyashev & Partners’ work in the energy and natural resources sphere covers exploration and exploitation of oil and gas fields, transportation of energy resources, trade in oil and gas, and electricity and natural gas supply to end-use consumers. At the helm of the practice, Mikhail Ilyashev advises on foreign investments in Ukrainian companies and enterprises, structuring of international M&A and asset acquisitions, and corresponding due diligence. Arbitrator Roman Marchenko has a strong track record in energy sector disputes, and Valeriia Gudiy frequently assists clients with regulatory, licensing, and corporate issues in the energy sphere.
Intellectual Property – Tier 2
Practice Head: Mikhail Ilyashev
Other Key Lawyers: Roman Marchenko, Oleksandr Fefelov, Andriy Lytvyn
Ilyashev & Partners has a strong trade mark and copyright offering which excels in disputes, but is increasingly diversifying its offering to cover portfolio management, trade mark and patent prosecution, enforcement, franchising and licensing. For trade mark litigation, practice head Mikhail Ilyashev is a key name, frequently acting in top cases for clients in the pharmaceuticals, media, and technology spaces.
Private Client – Tier 2
Leading partners: Mikhail Ilyashev, Roman Marchenko
Other Key Lawyers: Yevgen Solovyov
Ilyashev & Partners’ private client practice is known for handling complex, often contentious mandates involving asset disputes, inheritance issues, sanctions-related advice and business restructuring for individuals with significant domestic and cross-border interests. The team also advises on tax and asset structuring, real estate, and family-law matters, including international divorce and custody issues. The group is led by Roman Marchenko, with further key figures including Mikhail Ilyashev and Yevgen Solovyov.
Real Estate and Construction – Tier 2
Next Generation Partners: Dmytro Hrybov
Other Key Lawyers: Mikhail Ilyashev, Roman Marchenko, Dmytro Hruba
Ilyashev & Partners advises on the full range of real estate, land use and construction matters, with notable involvement in large-scale national infrastructure projects, including river and sea port, airport and major road developments. The team provides comprehensive support with land transactions, market regulation, natural resources and environmental compliance, and is regularly engaged in precedent-setting disputes. Practice head Dmytro Hrybovleads on complex land and construction mandates, assisting with high-value real estate contracts, due diligence, compliance risk management and ongoing strategic advisory work.
Tax – Tier 2
Leading Partners: Roman Marchenko
Leading Associates: Ivan Maryniuk
Other Key Lawyers: Roman Marchenko, Olena Omelchenko
Characterised by the three pillars of standalone tax advice, tax litigation, and tax law support for corporate matters, the practice at Ilyashev & Partners is often instructed on cross-border tax matters involving CEE countries. The industrial, agricultural, and technology sectors are all well represented in the team’s client base, and advice to NGOs is a particular strength. Practice head Ivan Maryniuk is an expert in providing tax planning for foreign investment projects in Ukraine. Among the group regularly involved in tax matters are experienced litigator Roman Marchenko; international trade and customs advisor Olena Omelchenko.
White-Collar Crime – Tier 2
Leading partners: Mikhail Ilyashev, Roman Marchenko
Other Key Lawyers: Kostiantyn Kryvenko
Ilyashev & Partners boasts experience advising on white-collar crime matters across a range of industries, including hospitality, construction, and real estate. The team specialises in representing witnesses in criminal cases, individuals under criminal investigations, and those accused of business-related crimes. Its matters include handling allegations of fraud, money laundering, and embezzlement. Kostiantyn Kryvenko, who was promoted to team head in March 2025, brings corporate client liability expertise. Other key figures include Roman Marchenko and Mikhail Ilyashev. Roman Marchenko advises clients on cross-border tax evasion cases, while Mikhail Ilyashev regularly acts for Ukrainian businesspeople and politicians.