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Sonya Hsu

Sonya Hsu

Senior Partner
Baker & McKenzie

Biography

Sonya is the head of Antitrust and Competition practice group of our Firm, and specializes in the areas of litigation and arbitration, particularly in cross-border commercial disputes and consumer protection, as well as cartel investigation, restraint of competition and hotel related agreements. Also under her leadership, our Firm's Antitrust and Competition practice was ranked by Global Competition Review Elite Law Firm status from 2013 to 2023 and was once again ranked by The Legal 500 Asia Pacific Tier 1 Leading Law Firm in Taiwan in 2025. She has been named as Thought Leaders & Competition Lawyer in Taiwan by Who's Who's in 2024 and Leading Individual by The Legal 500 Asia Pacific in 2025.

Practice Focus

Sonya concentrates her practice on dispute resolution, antitrust and competition, hotels and resorts.

Representative Legal Matters

  • Represented an Irish company in a lawsuit on the recognition and enforcement of an English judgment in Taiwan as well as the provisional attachment proceedings.
  • Represented a bank in a civil lawsuit and criminal lawsuit in connection with Ponzi scheme. 
  • Represented a subsidiary of a foreign bank in defending various lawsuits initiated by the investors in relation to the sale of the structured notes products. 
  • Represented several banks in defending the lawsuits and arbitration claims initiated by the investors in relation to the sale of the target redemption forward products.
  • Represented a subsidiary of a foreign bank in defending various lawsuits initiated by the guarantors in relation to the loan granted to the borrower.
  • Assisted a Taiwan bank and a Taiwan insurance company in defending lawsuits filed by Trustee for the Liquidation of Bernard L. Madoff Investment Securities LLC and the Foreign Representative and Liquidation of Fairfield Sentry Limited.
  • Assisted a local shipping company in two arbitration cases in London.
  • Represented eight banks in an ICC arbitration in Paris.
  • Represented an IT company in a SIAC arbitration in Singapore 

Professional Honors

  • Named Leading Individual by The Legal 500 Asia Pacific (2025)
  • Named by the Who’s Who Legal: Thought Leaders & Competition Lawyer (2024)

Professional Associations and Memberships

  • Taipei Bar Association – President (February 11, 2025 ~ present) 
  • Taipei Bar Association – Executive Director (2023 ~ February 2025)
  • Ruoyu Legal Culture and Education Foundation - Director (2025 ~ present) 
  • Taipei Bar Association - Director (2020~2023)
  • Taipei Bar Association - Deputy Secretary General (2018~2020)
  • Non-governmental advisor of International Competition Network (2014~present)
  • Taipei Bar Association - Chair of Competition Committee (2014~2017)
 

Admissions

  • Taipei~Taiwan (1992)

Education

  • Cornell University (LL.M.) (1995)
  • National Taipei University (formerly National Chung-Hsing University) (College of Law & Commerce, LL.B.) (1991)

Languages

  • English
  • Mandarin

Publications

  • Author, "A More Flexible Pricing Management," (Commercial Times, 08 May 2015)
  • Author, "Amendment to the Taiwan Fair Trade Law," (Monde Jade Magazine, April 2015)
  • Author, "Leniency Program for the Concerted Action," (Market Daily, January 2013)
  • Author, "You Must Know Leniency Program – An Important Rule for Enterprises," (Monde Jade Magazine, April 2012)
  • Non-governmental advisor of International Competition Network Taipei Bar Association - Director (2020~present)
  • Articles contributor to Dispute Resolution Handbook 2011/12 Cross-border Country Q&A (Taiwan), Practical Law Company
Baker & McKenzie, a Taiwanese Partnership, is a member of Baker & McKenzie International, a Swiss Verein.