SILK PROFILE
Sebastian Isaac KC

Sebastian Isaac KC

UK Bar 2026

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Ranked in 3 practice areas

About

Provided by One Essex Court

UK Bar

Practice Areas

Sebastian is a leading practitioner specialising in complex and high value commercial disputes, in litigation and international arbitration. Seb is particularly noted for his user-friendly and commercial approach, and his command of the courtroom as a cross-examiner and advocate. Recent cases include: acting for the US asset manager TPG to defend billion dollar claims brought by Zia Magomedov arising from its investment in Russian infrastructure assets; for Credit Suisse in the Bermuda Court of Appeal defending claims for losses caused by a rogue trader; representing defendants in the high-value fraud claim between Otkritie Bank and the owners of the O1 Property Group; appearing in ICC arbitration for a Dutch infrastructure investment company in a dispute with its joint-venture partner in a shipping terminal; acting for shareholders of the failed Real Estate Investment Trust, Home REIT; representing an NFT auctioneer in a dispute with a high-value bidder; and conducting an independent investigation into the takeover of West Bromwich Albion FC. Seb also represented the Ukrainian billionaire Victor Pinchuk in his successful LCIA Arbitration and High Court actions against Igor Kolomoisky and Gennadiy Bogolyubov. Main areas of practice include energy, commodities, M&A, banking and finance, civil fraud, and professional negligence.

Chambers Review

Provided by Chambers

UK Bar

Banking & Finance - London (Bar)

Band 3
Band 3

Individual Editorial

Sebastian Isaac KC has an ever-growing reputation as a capable barrister whose commercial disputes practice is not limited to banking and finance disputes. In this field, he has particular experience in securities cases and those turning on allegations of fraud. He is often instructed in matters with a significant international dimension. Isaac is particularly noted for his experience in relation to transactions of debt-based securities such as bond sale disputes and cases concerning subordinated debt. He acts for prominent banks, financial organisations and individuals.

Fraud: Civil - London (Bar)

Band 4
Band 4

Individual Editorial

Having distinguished his civil fraud practice as a junior, Sebastian Isaac KC has continued to expand his civil fraud work as a silk. He is routinely instructed in high-value and high-profile matters involving fraudulent misrepresentation, deceit and conspiracy. He often acts in cases involving multiple jurisdictions, and he has experience appearing before the Privy Council.

Strengths

Provided by Chambers

  • He has the perfect combination of pragmatism, realism and intellect.

    Banking & FinanceUK Bar
  • He thinks about things in such a sensible way, always focusing on the heart of the matter.

    Banking & FinanceUK Bar
  • Sebastian is a fantastically clever silk, my go-to for tough cases where you need an intellectual heavyweight. He is a great advocate and his cross-examination is excellent.

    Banking & FinanceUK Bar
  • He thinks about things in such a sensible way, always focusing on the heart of the matter and getting a good result for the clients.

    Fraud: CivilUK Bar
  • Sebastian is exceptional and incredibly bright. He is a phenomenal advocate.

    Fraud: CivilUK Bar
  • He has got an ability to think through novel angles.

    Fraud: CivilUK Bar

Ranked Barristers at One Essex Court (226)

All Circuits

London (Bar)

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