konstantin antoniuk
Head of Sanctions Compliance Practice

Senior Associate of Dispute Resolution Practice
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Konstantin is a solicitor of England and Wales and Russian-qualifed lawyer with eight years of experience in international law firms and the family office of a UHNWI.

He specializes in managing high-value, complex and cross-border international disputes and providing advisory services on sanctions compliance.

Konstantin has extensive experience representing clients in arbitration proceedings under the rules of leading arbitral institutions and ad-hoc rules, including SIAC, LCIA, ICC, DIAC, ICAC, UNCITRAL, ICSID, and LMAA. He regularly handles judicial and administrative proceedings across the Middle East, the U.S., the UK, Europe, Russia, and other jurisdictions.

Konstantin frequently advises clients on compliance with U.S., EU, UK, and other sanctions regimes. He regularly consults individuals and companies on mitigating potential sanctions risks. Konstantin has significant experience in handling delisting proceedings in the U.S., EU, UK, Canada, Switzerland, and other jurisdictions, including cases with successful removal from sanctions lists. He also specializes in managing criminal cases involving alleged sanctions violations and handling sanctions-related residency and citizenship cases.

In addition, Konstantin provides consulting services on corporate matters, KYC, and AML compliance.
Konstantin's clients include companies and individuals from the shipping, commodities, construction, energy, agro-industrial, sports, and banking sectors.

Konstantin serves as a Chairman of RAA25, an association of young dispute resolution practitioners (branch of Russian Arbitration Association), and actively speaks at dispute resolution and sanctions events.

AWARDS AND RANKINGS
  • Konstantin is included in TOP 10 Russian arbitration practitioners (RAA40, 2024).

EDUCATION AND ADMISSION
  • University of Manchester (UK), LL.M, 2021;
  • Moscow School for the Social and Economic Science (Russia), Master of Law, 2021;
  • Higher School of Economics (Russia), Bachelor of Law, 2019.

LANGUAGES
  • English, Russian.
    • Advised client from the maritime and shipping sector on the complex debt collection and restructure involving claims against numerous parties from Middle East, India and Brazil in the amount of over USD 150 million.
    • Represented seller in USD 1,5 million SIAC arbitration against the buyer regarding non-payment of cargo and demurrage fees under applicable English law.
    • Advised client in the UAE commercial tenancy dispute in amount of AED 1 million which ended with a settlement in favor of the client.
    • Represented the buyer in the USD 3.5 million bunker fuel supply dispute initiated by the supplier in the UAE court and LMAA arbitration under the UAE, English and US laws.
    • Consulted clients on disputes strategy with UAE, Swiss and European banks to release to funds illegally withheld by banks.
    • Managed 10+ administrative and judicial proceedings to challenge sanctions designations of the US, Europe, UK, Switzerland, Canada, Japan and other jurisdictions (including cases where the clients were delisted).
    • Represented clients in criminal investigations initiated by EU states based on alleged violations of the EU sanctions regime, which were successfully terminated in favor of the clients.
    • Advised a lender on a potential $1 billion LCIA claim against the borrower citing inability to repay the loan on sanctions grounds.
    • Advised clients on implications of US sanctions for the client's assets in Europe and the UAE.
    • Consulted Russian bank on enforcement of Dubai court judgement in Russia and on the set off issues with its borrower and borrower’s guarantor.
    • Consulted client on potential investment arbitration claims against EU states, the EU Commission and Switzerland arising from the imposition and implementation of sanctions as a potential violation of the investment protection under the numerous bilateral investment treaties and the Energy Charter Treaty.
    • Represented Russian investor (Manolium-Processing LLC) in the first winning investment arbitration against Belarus under the UNCITRAL Rules and the Treaty on the Eurasian Economic Union. The investor was awarded compensation for expropriation of investments and violation of the most-favored nation treatment in the amount of approximately USD 25 million (PCA Case No. 2018-06).
    • Represented the Italian contractor in a complex dispute with a total value of USD 20+ million with a Russian subcontractor. The dispute involved (1) Stockholm-seated ICC arbitration with a successful outcome for the client, (2) defending the client in Russian parallel litigation proceedings initiated by the insolvent Russian subcontractor on debt collection, asset freeze and anti-arbitration injunction with a successful outcome for the client and (3) defending the client from the claw-back claim in subcontractor's insolvency case.
    • Represented American IT-corporation in 15+ disputes arising from compliance with the US and EU sanctions with a total value in dispute over USD 500 million. The representation involved defending the client from the unprecedented claims on judicial fines for failure to voluntarily execute judgement, representing the client in the enforcement proceedings with unprecedented asset seizures in Russia and in further insolvency proceedings.
    • Conducted internal corporate investigations in multi-national corporations from FMCG, pharmaceutical and engineering sectors for reviewing compliance with the US, UK and local anti-bribery regimes over the Russian and CIS subsidiaries.
    • Participated in the UK High Court proceedings brought by the Russian major gas supplier against the Bulgarian wholesaler as a part of the complex corporate dispute with the Bulgarian partner.
    • Represented American IT-corporation in 10+ arbitration and litigation proceedings with a total value of USD 15 million initiated by Russian distributors claiming damages after the suspension of client's activities in Russia due to the US and EU sanctions.
    • Represented French retailer in a complex construction dispute amounting to USD 50 million with a Russian contractor under the purchase contract of future retail premises. Each party sought to invalidate the contract refusal of the other and claimed damages, fines or advance payment. Proceedings ended with settlement.
    • Defended the European leading commercial vehicle manufacturer in the Russian dealer’s claim on invalidation of the client's unilateral termination of the distributorship agreement after the imposition of the EU sectoral sanctions.
Konstantin is an author of the following PUBLICATIONS:

  • There is always a first time for everything: Luxembourg faces its first investment arbitration on Mr. Fridman's claim, RAA25, 2024.

  • Alfa Group is to recover $7 bln from Cyprus and the EU for the loss of Alfa Bank and Alfa Insurance RAA25, 2024.

  • Derivative claims in Russia: corporate protective mechanism from the manager’s harm or a way to shareholder’s interference into the corporate’s relations with third parties, Zakon.ru, 2024.

  • Reimbursement of legal fees for in-house and consultants in courts: experience of foreign jurisdictions, Zakon.ru, 2021.

  • Enforceability of arbitration agreements in case of dispute party’s insolvency, RAA Journal, 2019.

  • Unilateral arbitration clauses in Russian case law, RAA Journal, 2019.