Oil & Gas

At Koziakov & Partners, we provide comprehensive legal support to clients operating in the highly regulated and strategically important oil and gas sector. Our team combines deep industry knowledge with extensive experience in corporate, commercial, and regulatory law, ensuring that our clients receive practical, business-oriented solutions in complex and high-stakes matters.

Ukraine’s oil and gas sector operates at the intersection of strategic regulation, complex corporate structures, tax exposure, and asset-heavy operations – from upstream field development and subsoil use to downstream logistics, supply chains, and distribution infrastructure. Transactions and disputes in this industry require a legal strategy that combines corporate structuring, regulatory navigation, and an enforcement-driven mindset.

Koziakov & Partners supports oil and gas companies, investors, and related stakeholders across the full lifecycle of projects and assets – helping clients structure acquisitions, conduct legal and tax due diligence, manage regulatory risk, and protect their interests in sensitive disputes, including tax and debt recovery matters.

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Our Services in the Oil & Gas Sector

We offer a full suite of legal services to oil and gas companies, investors, and industry stakeholders, including:

  • M&A and asset acquisitions, corporate structuring, shareholder arrangements, and restructurings.
  • Legal and tax due diligence for upstream and downstream assets and corporate groups.
  • Regulatory support in subsoil-use, field development and operational compliance matters.
  • Tax strategy and disputes, debt recovery, and enforcement planning.
  • Representation in Ukrainian courts and, where relevant, international arbitration forums.
  • Risk assessments, crisis response, and defense in audits, investigations, and contentious proceedings.
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Our Services in the Agriculture Sector

We offer a full suite of legal services to agricultural companies, investors, and industry stakeholders, including:

  • Merger clearance, compliance audits, defense in investigations.
  • Asset acquisitions, shareholder agreements, restructuring.
  • Legal support for bank financing, syndicated loans, and private equity transactions.
  • Anti-dumping defense, WTO compliance, export-import regulation.
  • Representation in Ukrainian courts and major international arbitration forums.
  • Land use, environmental permits, food safety, customs.
  • Risk assessments, structuring, and defense in audits or investigations.
Our contacts

Representative Experience

Representative engagements include:

  • Legal assistance in transactions for the acquisition of shares in Ukrainian companies, including acquisition of a controlling block of shares in OJSC “Chernihivnaftoprodukt” and acquisition of a controlling block of shares in OJSC “Chernivtsinaftoprodukt”
  • Due diligence for the acquisition of 100% in LLC “Oil Company ‘Bukovina’” (exploitation of the Putylskyi and Staykivske fields).

  • Legal and tax due diligence for acquisition of 100% in CJSC Industrial Research Association “Region” (research and development of the Kadobnyanske oil and gas field).

  • Legal and tax due diligence for acquisition of 100% in CJSC “Devon” (trial and industrial operation of the Sakhalin field).

  • Due diligence for acquisition of controlling stakes in OJSC “Hmelnytsknaftoprodukt”, OJSC “Sumynaftoprodukt”, and OJSC “Zhytomirnaftoprodukt”.

  • Due diligence for acquisition of controlling stakes in JSC “Tysagas”, including projects related to:

    • gas production on the n-Komorovski field;

    • trial and industrial operation of the Uzhgorod area;

    • trial and industrial operation of the Stanivske deposits;

    • trial and industrial operation of the Korolevska area.

  • Representation of SE “Gas Ukraine” (Naftogaz of Ukraine) in a claim against TEC-2 (Kharkiv) for recovery of tax debt.

  • Representing Subsidiary Enterprise “Petrochemical Holding Ukraine” in claims concerning annulment of tax notifications/decisions and recovery of tax debt.

  • Representing Subsidiary Enterprise “Petrochemical Holding Ukraine” in a claim for recovery of debt from OJSC “Chernihiv enterprise ‘Khimvolikno’”.

  • Legal advice to affiliated structures of SE “Gas Ukraine” (Naftogaz of Ukraine) in disputes including SE “Gas Ukraine” v “Donetskoblenergo” and SE “Gas Ukraine” v Kharkiv TPS.

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Koziakov & Partners Recognised in The Legal 500 2026

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Two Koziakov & Partners lawyers recognised by Yurydychna Hazeta (2026)

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