
Orrick, Herrington & Sutcliffe (UK) LLP represents multinationals, high-net-worth individuals and nation states in energy, infrastructure, technology, finance and life sciences disputes. Promoted to global international arbitration practice chair in April 2024, Mark Beeley is a ‘first-class advocate’; Sarah Stockley focuses on energy sector international arbitrations; and the track of record of James Hargrove, who works between Geneva and London, includes arbitrations under all the major institutional arbitration rules. The practice further includes Harriet Foster, who acts in commercial and investor-state arbitrations.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Sector knowledge
Testimonials
Collated independently by Legal 500 research team.
- ‘The team has an excellent mix of strategists, technically-strong lawyers, and those who are able to manage massive litigation very efficiently. They work seamlessly with Counsel.’
- ‘Mark Beeley and Sarah Stockley have fantastic insight into the energy industry. Unbelievably responsive and represent good value.’
- ‘Mark Beeley and Sarah Stockley are both top-class partners - the quality of the advice is top level.’
- ‘Mark Beeley is a first-class advocate and strategist. Gets what he wants by knowing how and when to ask.’
- ‘James Hargrove is a highly-astute strategist, who is very commercially savvy and an excellent client manager.’
Key clients
- Litasco
- Exxonmobil
- TSK
- Khaitan Holding (Mauritius)
- Louis Dreyfus Company
- Capricorn Energy
- DNO
- Marubeni
Work highlights
Representing KHML in its bilateral investment treaty claim against India, arising out of India’s cancellation of its 2G mobile telephone provider licences.
Representing a European Joint Venture in a large-value, London-seated ICC arbitration, which was brought by an energy company in relation to an oilfield.
Representing a multinational energy company in a $5bn-plus UNCITRAL arbitration that involves a Middle-Eastern state.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.

Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
Mark Beeley
Other key lawyers
Sarah Stockley; James Hargrove; Harriet Foster; Alexander Witt

