Highly regarded for its experience in blockchain, cryptocurrency and technology disputes, ONTIER LLP‘s London office acts in high-stakes arbitrations under the UNCITRAL, ICC, AAA, LCIA, SCC, CIETAC, HKIAC, and SIAC rules. With extensive experience in international arbitration, London disputes head Oliver Cain ’gets very good results’; and Claire Morel de Westgaver, a February 2025 hire from Bryan Cave Leighton Paisner, is ‘a real star with an established reputation in international arbitration’. Felicity Potter departed the firm in September 2024.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
‘Ontier has a particularly strong presence in the London, Spanish and Latin American markets, and is well-resourced.’
‘A real powerhouse in arbitration and dispute resolution, and they have an excellent base of global clients.’
Work highlights
Acting for a Portuguese multinational energy corporation in LCIA arbitration proceedings against a Spanish energy utility company, in respect of high-value claims and counterclaims (arising out of an EFET general agreement for the supply of natural gas).
Lawyers
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
Oliver Cain
Other key lawyers
Claire Morel de Westgaver; Nicholas Dawson