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Hannah Estelle Cassidy

Hannah Cassidy


Hannah is a contentious regulatory partner who also advises financial services clients on regulatory policy and compliance. She leads the award-winning Financial Services Regulatory practice in Hong Kong.



Hannah helps international and regional financial institutions with contentious regulatory cases and  cross-border investigations involving, for example, systems and controls breaches, anti-money laundering failures and insider dealing.

She has particular expertise in advising clients on the conduct of high profile board-led, independent investigations, particularly in relation to culture and conduct.

Hannah's team regularly leads discussions with regulators on behalf of the financial services industry in relation to regulatory reform initiatives. This includes working closely with leading industry bodies, including ASIFMA and AIMA.

Hannah also regularly advises clients on regulatory developments, including in relation to licensing, senior management accountability and fintech. She is leading the firm's thought leadership efforts in the Asia-Pacific region on benchmark reforms, including the litigation and regulatory risks arising from IBOR discontinuation.

Hannah is described as a “key name in contentious regulatory work” and was recently ranked as a “Next Generation Partner” (Legal 500).

Hannah is a co-chair of the firm's Global Banks Sector Group, sits on the Advisory Committee of Women in Finance Asia and regularly speaks on industry panels.

Hannah's experience includes advising:

  • the Hong Kong branch of an international bank on interactions with the Hong Kong Monetary Authority (HKMA) in relation to anti-money laundering and counter-financing terrorism (AML/CFT) compliance
  • a large Chinese financial institution on an investigation by the Hong Kong Securities & Futures Commission (SFC) into its role as an IPO sponsor
  • the board of a Hong Kong listed company on an independent investigation into alleged misconduct by former senior management
  • a hedge fund on its defense in the context of SFC regulatory enforcement proceedings relating to alleged systems and controls breaches around short-selling
  • a global fintech company in relation to a multi-jurisdictional investigation of corporate governance issues, involving regulatory interactions in Hong Kong, Singapore and other Asia-Pacific jurisdictions
  • a US investment bank in the context of a SFC investigation into suspicious trading activities at its Hong Kong branch
  • a global private bank on an investigation in relation to issues arising from 1MDB
  • a Korean corporation on the setup of cryptocurrency exchanges globally
  • a global hedge fund on Hong Kong licensing and regulatory self-reporting issues



Hannah is qualified as a solicitor in Hong Kong (2017) and England and Wales (2008). She trained with Herbert Smith Freehills in London and moved to Hong Kong in 2016.