Yannik Hässig

Senior Associate

Yannik Hässig

Yannik’s practice focuses on the resolution of complex, often multi-jurisdictional corporate and commercial disputes before state courts as well as arbitral tribunals. He advises clients in a wide range of industry sectors, such as financial services, private investment, pharmaceuticals and chemicals, commodities, information technology, blockchain, machinery, electrical and metal industries, as well as sports, media and entertainment.

Yannik regularly represents clients in interim measures, asset recovery, attachment, enforcement as well as insolvency-related proceedings and often advises and represents clients in regulatory and international legal assistance proceedings as well as criminal investigations. In addition to his corporate and commercial disputes practice, Yannik regularly advises and represents private clients in estate and trust disputes.

Yannik is listed as «Recommended Lawyer» by Legal 500 in Sports Law and Insolvency (2024).

Before joining 5Gambit Disputes in 2024, Yannik worked in the dispute resolution practice of a leading commercial law firm in Zurich and at a district court in the canton of Zurich.

+41 44 442 03 65

+41 79 528 67 85

State-court litigation

  • Acting for a national bank in an EUR 45 million dispute with a Swiss company in the financial services sector as well as its board members and liquidators regarding investments made on behalf of the national bank
  • Acting for a Swiss company in the machinery, electrical and metal industries sector in a dispute with its contractor regarding delays in delivery and defects in tools to be delivered under a work contract which caused the client’s end customer in the pharmaceuticals sector to lose an alleged CHF 500 million in sales
  • Acting for a Swiss bank in a CHF 2 million dispute regarding commission payments under a business introducer agreement
  • Acting for a sports media rights agency in a CHF 40 million dispute with three major Swiss national sports federations based on unjust termination of agency contracts
  • Acting for a venture capital investment fund in a dispute regarding an EUR two-digit million investment in a Swiss company
  • Acting for an athlete in a dispute regarding the purchase of a Swiss luxury watch
  • Acting for an Israeli chemicals company in a dispute regarding the termination of a license agreement
  • Acting for a Swiss hospital in a dispute with 30 health insurance companies regarding the reclaiming of insurance benefits
  • Acting for a private client in a dispute regarding the division of a CHF 400 million estate
  • Acting for an athlete in an EUR 2 million dispute with his former agent regarding commission payments

International arbitration

  • Acting for an entrepreneur in an EUR 5 million post-M&A arbitration regarding alleged violations of disclosure and information duties in the context of the sale of a company in the industrial sector
  • Acting for a US distribution company in the electrical sector and its indemnity insurance that were confronted with indemnification claims and claims for breach of contract in the amount of USD 45 million
  • Acting for an athlete in an EUR 1 million employment law arbitration against a football club
  • Acting for a consultancy company in an EUR 2 million arbitration regarding commission payments under an agency contract
  • Acting for an athlete in anti-doping proceedings incl. interim measures proceedings before the CAS
  • Acting for a Swiss commodity trading company in connection with the enforcement of an EUR 50 million ICC award by a German company in the machinery, electrical and metal industries sector
  • Acting for a Spanish company in the energy sector regarding the enforcement of a EUR 11 million ICC award against a Swiss company and its beneficial owner, including claw-back actions against relatives of the beneficial owner

Asset recovery, enforcement, and insolvency-related court proceedings

  • Acting for a litigation trust arising out of US Chapter 11 bankruptcy proceedings regarding the recovery of assets following a USD 300 million fraud
  • Acting for a Dubai-based individual and his relatives in the defense against the enforcement of a GBP 250 million UK court judgement in Switzerland
  • Acting for a US-based trading platform for cryptocurrencies in the recovery of assets in Switzerland after transfers that were erroneously executed due to the malfunction of its software
  • Acting for a Swiss canton in the enforcement of a CHF 25 million court order against a Swiss company in the real estate sector based on the causation of environmental pollution
  • Acting for a Dubai-based wholesales company in the enforcement of an AED 140 million payment order against a Swiss individual

Criminal proceedings and international legal assistance in criminal matters

  • Acting for a foreign senior state official in judicial assistance proceedings in criminal matters based on alleged corruption, in which assets were seized and bank documents were supposed to be disclosed to foreign authorities, incl. appeal proceedings to the Swiss Federal Tribunal
  • Acting for two Swiss companies and their beneficial owners in international legal assistance proceedings in criminal matters based on alleged money laundering in EUR two-digit million amounts, in which assets were seized and bank documents were supposed to be disclosed to foreign authorities
  • Acting for the CEO of the Swiss subsidiary of an internationally renowned IT group who was accused of violating migration laws with respect to the employment of workers
  • Acting for a Scandinavian insurance company in connection with the embezzlement of assets by a Swiss reinsurance broker and its beneficial owner


  • German
  • English
  • MLaw, University of Lucerne
  • Bachelor of Science in Business Law, Zurich University of Applied Sciences