People | Pakt Halloran & Reyes LLP

Eileen Halloran

Senior Partner · New York

Trial lawyer. Merged her practice into the firm in 2010 with Tomás Reyes, after fourteen years trying commercial cases in the federal courts.

Has tried thirty-one cases to verdict, nineteen as lead counsel, seventeen of them here. Two of the eleven adverse outcomes on our record are hers.
Acts principally in fraud, contract, and post-acquisition disputes with exposure above US$500 million.
Led the client team for a European reinsurer in the nine week Commercial Court trial concluded in August 2026, with Adaeze Okonjo conducting the advocacy.
Chairs the firm's conflicts committee, which decides which matters the firm accepts.

Admitted New York; England and Wales (registered foreign lawyer). Law clerk, United States Court of Appeals for the Second Circuit, 1994.
J.D., Georgetown University Law Center. A.B., Fordham University.

[email protected] · +1 (212) 555-0141

Tomás Reyes

Managing Partner · New York

Trial lawyer and appellate advocate. Merged his practice into the firm in 2010, from the trial section of a federal prosecutor's office.

Former Assistant United States Attorney. Tried twenty-two criminal and civil matters before entering private practice.
Acts in securities, governance, and controller-transaction litigation, including in the Delaware Court of Chancery.
Tried the Chancery action that rescinded a US$3.4 billion take-private in July 2026.
Has argued in eleven federal circuits.

Admitted New York; Delaware. Law clerk, United States Supreme Court, October Term 1998.
J.D., Yale Law School. B.A., University of Texas at Austin.

[email protected] · +1 (212) 555-0142

Adaeze Okonjo

Partner, Head of London · London

Solicitor-advocate. Joined the firm in 2014 to open the London office, and runs its English litigation practice and Commercial Court trial work.

Higher rights of audience in England and Wales. Has conducted eight trials as advocate, winning six.
Acts in banking, structured finance, and insurance disputes, frequently for claimants against institutions.
Obtained the strike-out on limitation of a £540 million follow-on antitrust claim in April 2026.
Conducted the advocacy in the nine week Commercial Court trial concluded in August 2026.

Admitted England and Wales; Republic of Ireland.
LL.B., London School of Economics. Legal Practice Course, BPP Law School.

[email protected] · +44 (0)20 7946 0181

Anton Brandt

Partner, Head of Arbitration · Geneva

Arbitration counsel and arbitrator. Joined the firm in 2013 to build the Geneva practice.

Counsel in more than sixty institutional arbitrations under ICC, LCIA, SCC, and UNCITRAL rules, of which nineteen went to a final award.
Sits as arbitrator by appointment of parties and of institutions, and declines appointments that would conflict.
Defended the CHF 640 million award upheld by the Swiss Federal Tribunal in June 2026.
Acts in energy, commodity, and investor-state disputes.

Admitted Geneva; Frankfurt. Arbitrator panel member, ICC and the Swiss Arbitration Centre.
Dr. iur., University of Freiburg. LL.M., Leiden University.

[email protected] · +41 22 595 0141

Priya Raval

Partner, Head of Enforcement · London

Enforcement and asset recovery. Joined the firm in 2016 from a fraud and insolvency practice.

Runs the firm's recovery group, including its seven in-house forensic accountants and investigators.
Obtains freezing orders, search orders, and receiverships, frequently without notice and at short order.
Traced and restrained assets in four jurisdictions in support of a US$410 million judgment.
Advises award creditors on enforcement against states and state entities.

Admitted England and Wales; British Virgin Islands.
LL.B., University of Nottingham. Legal Practice Course, University of Law.

[email protected] · +44 (0)20 7946 0182

Jun Koda

Partner, Investigations · New York

White collar and cross-border investigations. Joined the firm in 2018 from financial regulatory enforcement.

Conducts internal investigations for boards and audit committees, and defends the individuals inside them.
Acts in parallel proceedings where two or more authorities are looking at the same conduct.
Obtained the closure without charge of a two year cross-border investigation into a listed industrial group.
Advises on self-reporting decisions and on the disclosure consequences of making one.

Admitted New York; California.
J.D., Columbia Law School. B.S., University of California, Berkeley.

[email protected] · +1 (212) 555-0143

Marguerite Cole

Partner, Securities Litigation · New York

Joined the firm in 2015 from a securities defence practice.

Defends issuers, directors, and underwriters in class and opt-out claims in the federal courts.
Argued the motion that dismissed a US$900 million securities class action in the Southern District of New York in August 2026.
Has taken four securities matters through summary judgment and two to trial.

Admitted New York; Connecticut.
J.D., New York University. B.A., Wesleyan University.

[email protected] · +1 (212) 555-0144

David Aronow

Partner, Appellate · New York

Appellate advocate. Joined the firm in 2012 after nine years in a state solicitor general's office.

Has argued more than seventy appeals, including four in state courts of last resort.
Preserves the record for appeal from the pleadings, and is brought into trial teams before the first motion is filed.
Takes over appeals from trial counsel in roughly a third of the appellate matters he runs.
Has lost two appeals he expected to win, both on standing, and says so in the first meeting when a client asks about odds.

Admitted New York; District of Columbia.
J.D., University of Michigan. B.A., Oberlin College.

[email protected] · +1 (212) 555-0145

Wen Li Tan

Partner, Delaware & Governance · New York

Joined the firm in 2017. Runs the firm's Delaware practice with Tomás Reyes.

Acts in expedited Chancery litigation, books and records demands, and controller transactions.
Ran the books and records campaign that produced the record in the US$3.4 billion rescission decided in July 2026.
Advises minority holders on when to move, which is usually earlier than they want to.
Speaks annually on books and records practice at a Delaware corporate law conference.

Admitted New York; Delaware.
J.D., University of Pennsylvania. B.A., Rice University.

[email protected] · +1 (212) 555-0146

Samuel Ochieng

Partner, Investigations · New York

Joined the firm in 2019 from a federal prosecutor's office in the Eastern District.

Former federal prosecutor. Tried eleven matters, including two multi-defendant fraud trials.
Conducts internal investigations and defends individuals in parallel criminal and regulatory proceedings.
Works with Jun Koda where a company and its officers need separate representation.

Admitted New York; New Jersey.
J.D., Howard University. B.A., Morehouse College.

[email protected] · +1 (212) 555-0147

Rebecca Stern

Partner, Insurance & Reinsurance · New York

Joined the firm in 2011, two years before the Geneva office opened.

Acts for policyholders, insurers, and reinsurers in coverage and treaty disputes on both sides of the Atlantic.
Built the reinsurance defence tried in London in August 2026 and sat second chair at the trial.
Has given expert evidence on London market practice in three US proceedings.

Admitted New York; Illinois.
J.D., Northwestern University. B.A., Barnard College.

[email protected] · +1 (212) 555-0148

Hugh Fairbairn

Partner, Commercial Litigation · London

Solicitor-advocate. Joined the firm in 2015 from a City disputes practice.

Higher rights of audience in England and Wales. Has conducted five trials as advocate.
Acts in fraud, contract, and shareholder disputes in the Commercial Court and the Chancery Division.
Instructs the Bar where a specialist advocate helps, and appears himself where it does not.
Chairs our associate advocacy training, which meets on Friday mornings whether or not there is a trial on.

Admitted England and Wales.
LL.B., University of Edinburgh. Legal Practice Course, BPP Law School.

[email protected] · +44 (0)20 7946 0183

Nadia Haddad

Partner, Banking & Structured Finance · London

Joined the firm in 2018 from a bank's own litigation function.

Former head of litigation at a European bank, which is where she learned how these cases are defended.
Acts in derivatives, securitisation, and credit agreement disputes, usually for the party that did not draft the document.
Advises lender groups on organising early in liability management disputes.
Spent eleven years in-house before joining us, and is the partner most likely to tell a client the case is not worth running.

Admitted England and Wales; France.
Maîtrise en droit, Université Paris II Panthéon-Assas. LL.M., King's College London.

[email protected] · +44 (0)20 7946 0184

Callum Reid

Partner, Fraud & Asset Dissipation · London

Joined the firm in 2019. Works alongside Priya Raval in the recovery group.

Obtains freezing orders, search orders, and disclosure against third parties, frequently without notice.
Ran the tracing exercise behind the receivership appointments made in two offshore jurisdictions in April 2026.
Was junior counsel on the 2019 application discharged for material non-disclosure, and reapplied successfully three weeks later. He now prepares that part of every without notice application we make.

Admitted England and Wales; Cayman Islands.
LL.B., University of Bristol. Legal Practice Course, University of Law.

[email protected] · +44 (0)20 7946 0185

Yewande Adeyemi

Partner, Competition · London

Joined the firm in 2020 from a competition practice at a magic circle firm.

Acts in follow-on damages claims and standalone abuse claims, for claimants and defendants in roughly equal measure.
Obtained the limitation strike-out of a £540 million follow-on claim in April 2026.
Appears in the Competition Appeal Tribunal and the Commercial Court.
Writes our competition notes, and reads the regulator's file before she reads the pleadings.

Admitted England and Wales.
B.A. Jurisprudence, University of Oxford. Legal Practice Course, BPP Law School.

[email protected] · +44 (0)20 7946 0186

Élodie Marchand

Partner, Investor-State · Geneva

Joined the firm in 2016 from a public international law practice.

Acts for investors and for states in treaty arbitration, including expropriation and fair treatment claims.
Was counsel in the ICC arbitration that produced the US$780 million award against a state energy company in August 2026.
Lectures on investment treaty practice at a Swiss university, and sits on the editorial board of an arbitration review.

Admitted Paris; Geneva.
Maîtrise en droit, Université Lyon III. LL.M., Graduate Institute, Geneva.

[email protected] · +41 22 595 0142

Klaus Zeller

Partner, Energy & Commodities · Geneva

Joined the firm in 2014, a year after the Geneva office opened.

Counsel in more than forty arbitrations arising from production sharing, offtake, and price review clauses.
Acts in the long-running disputes that outlast the contracts they come from, several of which have run past a decade.
Appears in German and English as well as French.
Co-author of a practitioner text on price review arbitration, now in its third edition.
Has twice been appointed by a tribunal to act as its own expert on Swiss law, which he regards as the more interesting work.

Admitted Geneva; Vienna.
Dr. iur., University of Vienna. LL.M., University of Geneva.

[email protected] · +41 22 595 0143

Sofia Almeida

Partner, Sanctions & Trade · Geneva

Joined the firm in 2021 from a commodities trading house.

Advises on designations, licensing, and the contractual consequences of overlapping sanctions regimes.
Acts in the contract disputes that follow a designation, where the argument is usually about what the party did in the weeks after it.
Former in-house counsel, which is why she is sceptical of force majeure notices sent before a licence application.

Admitted Lisbon; Geneva.
Licenciatura em Direito, Universidade de Lisboa. LL.M., University of Zurich.

[email protected] · +41 22 595 0144

Our partners.

Eileen Halloran

Tomás Reyes

Adaeze Okonjo

Anton Brandt

Priya Raval

Jun Koda

Marguerite Cole

David Aronow

Wen Li Tan

Samuel Ochieng

Rebecca Stern

Hugh Fairbairn

Nadia Haddad

Callum Reid

Yewande Adeyemi

Élodie Marchand

Klaus Zeller

Sofia Almeida

Eileen Halloran

Tomás Reyes

Adaeze Okonjo

Anton Brandt

Priya Raval

Jun Koda

Marguerite Cole

David Aronow

Wen Li Tan

Samuel Ochieng

Rebecca Stern

Hugh Fairbairn

Nadia Haddad

Callum Reid

Yewande Adeyemi

Élodie Marchand

Klaus Zeller

Sofia Almeida

Sixty-two lawyers, eighteen of them partners.

We clear conflicts before we take a matter.