Siddhartha Sivaramakrishnan represents investment bank underwriters, issuers, and vendors in a wide range of US, UK, and international equity and debt capital markets transactions. These include primary and secondary offerings under Rule 144A and Regulation S, US private placements, and US Securities and Exchange Commission (SEC)-registered offerings. He also advises on de-special purpose acquisition companies (SPACs); acquisition financings; structured financings; offerings of equity-linked instruments; and investment grade, high-yield, and sovereign debt offerings.

Siddhartha counsels on financial institution regulatory and compliance matters, including cross-border licensing and reporting requirements, senior managers’ responsibilities and conduct, insider dealing and market abuse, and the impact of US and European regulatory changes on financial market participants.

Adrian Cohen is a senior consultant in the London Finance, Restructuring and Special Situations Group.

With more than three decades of experience, Adrian’s background spans multiple sectors, including real estate, healthcare, hotels and leisure, media and entertainment, aircraft finance, infrastructure and project finance, energy, mining and steel production, financial services and banking. He regularly advises on cross-border mandates, particularly in matters related to continental Europe and emerging markets such as the Gulf and Eastern Europe. His experience includes drafting legislation for several jurisdictions within the GCC.

Adrian’s clients include lenders, agents, security agents, sponsors and corporate borrowers, commercial counterparties, derivative counterparties, and governmental and regulatory agencies.

• Chambers UK, Restructuring/Insolvency, 2025-2026
• Legal 500 UK, Recommended, 2026-2027

• CLLS Insolvency Law Committee, member
• INSOL, member
• ABI, member
• Senior Vice President of the Board of Deputies of British Jews

Areon Chan is a member of the Government Investigations & Compliance team in London, focusing on complex government and internal investigations, compliance advisory work, data privacy and Life Sciences regulatory and compliance matters.

Prior to joining McDermott, Areon was with an international US law firm in Hong Kong.

Areon speaks fluent English, Mandarin and Cantonese.

Investigations and Compliance

• Assisted on investigations carried out for a major US-listed pharmaceutical and medical device conglomerate in relation to allegations of bribery, corruption and internal controls in the PRC, India and Saudi Arabia, as well as allegations of senior employee misconduct in India*
• Assisted on advice to a leading multinational life sciences company on compliance and regulatory matters in Asia including direct-to-consumer advertisements, disease awareness programs, non-promotional events and grant reviews
• Assisted on advice to a leading US market infrastructure provider in connection with the acquisition of a Hong Kong-headquartered alternative market operator on due diligence in the context of the FCPA, AML and employment requirements*

Data Privacy and Cybersecurity

• Assisted on advising a leading multinational life sciences company on employment and data privacy matters in Asia, including COVID-19 vaccination-related policies and the collection, storage and transfer of sensitive health data*
• Assisted on advice to a multinational insurance brokerage firm on privacy issues arising from the expansion of their operations into Hong Kong and the PRC, including direct marketing and data localization requirements, as well as compliance with the PIPL*

Global Arbitration & Litigation

• Assisted on the representation of two PRC financial firms in HKIAC proceedings arising from a dispute of their investments in a semi-conductor company. The arbitration involved unique elements of bribery-related offences under PRC criminal law*
• Assisted on the representation of a real estate investment company (with a substantial real estate investment portfolio in the PRC) in opposing a winding-up petition in the High Court of Hong Kong*

*Matter handled prior to joining McDermott

• Law Society of Hong Kong

• Advised on conventional power plants, gas facilities (including gas storage), renewables projects (including solar projects, onshore and offshore win, tidal, combined heat and power (CHP) and waste-to-energy projects) for the likes of InterGen, Greater Gabbard, London Array, CG Power, Glennmont, EDFE, SSE, Airtricity, Infinergy, the ENER-G Group, Orange, Veolia, Morgan Stanley, npower and others
• Provided guidance on a broad range of commodities trading matters to industry participants, including Mercuria, Gazprom, Gazexport, Cadoil, Gunvor, ADDAX, RWEST, SSE, DONG and Statkraft, and to banks such as JP Morgan, Macquarie, UBS, Goldman Sachs and Morgan Stanley
• Advised on corporate, commercial and restructuring matters for corporate and commercial clients such as the Charities Aid Foundation, Elephant Communications, Marmalade Insurance, The Energy Consortium and BlueBay Investments, and utilities, banks and trading houses such as SSE, EDFE, npower, ADDAX, JP Morgan and Morgan Stanley

• The Best Lawyers in the United Kingdom, Energy & Natural Resources Law, 2009 – 2025
• Chambers Global 2016 – 2018
• Chambers UK 2017 – 2020
• Acritas Stars 2020, listed among independently rated lawyers
• The Legal 500 UK 2020 leading lawyer in Commodities – derivatives and physicals

• McDermott, London Pro Bono Committee
• St. Matthias Club for Young People, Hackney, chairman, 1995 to present