Pierre Mayer

Participant Type: 

Individual

Involved in 28 cases (21 International Investment Agreement (Investor–State) · 4 Foreign Investment Law (Investor–State) · 3 Contract (Investor–State)) · evidenced by 164 case documents on record

Tribunal Chair / President 5 cases in this role

• Dan Cake S.A. v. Hungary, ICSID Case No. ARB/12/9 View case details
  3 source documents

  • Dan Cake S.A. v. Hungary, Decision on Request for the Continued Stay of Enforcement of the Award (Revision Proceedings)
  • Dan Cake S.A. v. Hungary, Decision on Jurisdiction and Liability
  • Dan Cake S.A. v. Hungary, Notice of Arbitration (not public, see IAReporter story)
• EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, ICSID Case No. ARB/14/14 View case details
  14 source documents

  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Annex to Procedural Order No. 2
  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Award of the Tribunal
  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Claimants’ Memorial
  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Dissenting Opinion by Arbitrator Emmanuel Gaillard
  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Procedural Order No. 1
  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Procedural Order No. 2
  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Procedural Order No. 3 Decision on the Parties' Request for Provisional Measures
  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Procedural Order No. 4
  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Procedural Order No. 5
  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Procedural Order No. 6
  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Procedural Order No. 7
  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Respondent’s Counter-Memorial
  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Respondent’s Rejoinder
  • EuroGas Inc. and Belmont Resources Inc. v. Slovak Republic, Transcript of the First Session and Hearing on Provisional Measures
• Kontinental Conseil Ingénierie v. Gabonese Republic, PCA Case No. 2015-25 View case details
  1 source document

  • Kontinental Conseil Ingénierie v. Gabonese Republic, Judgment of the Paris Court of Appeal
• PJSC Gazprom v. Ukraine, PCA Case No. 2019-10 View case details
  2 source documents

  • PJSC Gazprom v. Ukraine, Notice of Arbitration
  • PJSC Gazprom v. Ukraine, Order Terminating the Arbitration Pursuant to Article 34(1) of the UNCITRAL Arbitration Rules
• Société Industrielle des Boissons de Guinée v. Republic of Guinea, ICSID Case No. ARB/12/8 View case details
  1 source document

  • Société Industrielle des Boissons de Guinée v. Republic of Guinea, Award (French)

Arbitrator 17 cases in this role

• ACF Renewable Energy v. Bulgaria, ICSID Case No. ARB/18/1 View case details
  3 source documents

  • ACF Renewable Energy v. Bulgaria, Award
  • ACF Renewable Energy v. Bulgaria, Decision on the Achmea Preliminary Objection
  • ACF Renewable Energy v. Bulgaria, Request for Arbitration
• Alverley Investments Limited and Germen Properties Ltd v. Romania, ICSID Case No. ARB/18/30 View case details
  1 source document

  • Excerpts of Award
• BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, ICSID Case No. ARB/14/22 View case details
  51 source documents

  • Award
  • Award [Redacted]
  • BSG Resources Limited v. Republic of Guinea, Procedural Order No. 2 on Transparency
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 14
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Claimant's Memorial
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Claimants' Post-Hearing Brief
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Claimants' Reply
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Claimants' Reply Post‐Hearing Briefs
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Claimant’s Response to the Requests of the Republic of the Republic of Guinea under Articles 28(1) and 39(1) ICSID Arbitration Rules
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Commentaires de la République de Guinée sur la Décision Eurogas
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Hearing Transcripts - Day 1
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Hearing Transcripts - Day 1
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Hearing Transcripts - Day 2
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Hearing Transcripts - Day 2
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Hearing Transcripts - Day 3
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Hearing Transcripts - Day 4
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Hearing Transcripts - Day 5
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Hearing Transcripts - Day 6
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Hearing Transcripts - Day 7
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Hearing Transcripts - Day 8
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Hearing Transcripts - Day 9
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Memorial of Guinea
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 10
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 12
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 13
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 15
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 16
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 17
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 18
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 19
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 20
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 3
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 6
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 8
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 9
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Public Hearing on Jurisdiction and the Merits from May 22, 2017 to June 2, 2017 (Live Stream)
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Request for Arbitration of BSG Resources (Guinea) Limited and BSG Resources (Guinea) SARL
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Request for Arbitration of BSG Resources Limited
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Requête de la République de Guinée sur le fondement de l’article 39(1) du Règlement d’arbitrage CIRDI
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Respondent’s Post-Hearing Brief
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Respondent’s Reply Post-Hearing Brief
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Réplique de la République de Guinée au soutien de la Requête sur le fondement des articles 28(1) et 39(1) du Règlement d'arbitrage CIRDI
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea,Claimants' Amended Memorial (Redacted Version per PO6)
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea,Claimant’s Rejoinder to the Republic of Guinea’s Requests under Articles 28(1) and 39(1) ICSID Arbitration Rules
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea,Procedural Order No. 4
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea,Requête de la République de Guinée (art. 28(1) et 39(1) Regl. CIRDI)
  • BSG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of GuineaClaimant’s Comments on Eurogas Decision
  • Procedural Order No. 1
  • Procedural Order No. 21
  • Procedural Order No. 22 (Redacted)
  • SG Resources Limited, BSG Resources (Guinea) Limited and BSG Resources (Guinea) SÀRL v. Republic of Guinea, Procedural Order No. 5
• Bacanora Lithium Limited, Sonora Lithium Ltd., and Ganfeng International Trading (Shanghai) Co. Ltd. v. United Mexican States, ICSID Case No. ARB/24/21 View case details
  6 source documents

  • Bacanora Lithium Limited, Sonora Lithium Ltd., and Ganfeng International Trading (Shanghai) Co. Ltd. v. United Mexican States, Procedural Order No. 3 (Decision on Bifurcation)
  • Bacanora Lithium Limited, Sonora Lithium Ltd., and Ganfeng International Trading (Shanghai) Co. Ltd. v. United Mexican States,Procedural Order No. 1
  • Bacanora Lithium Limited, Sonora Lithium Ltd., and Ganfeng International Trading (Shanghai) Co. Ltd. v. United Mexican States,Procedural Order No. 2
  • Bacanora Lithium and others v. Mexico, Procedural Order No. 5 Decision on the Suspension of the Arbitration due to Changed Circumstances, Dec 11, 2025
  • Bacanora, Sonora, and Ganfeng v. Mexico, Procedural Order No. 4
  • Revised Procedural Order No. 3 (Decision on Bifurcation)
• Buried Hill Serdar Limited v. Turkmenistan, ICSID Case No. ARB/25/40 View case details
  2 source documents

  • Buried Hill Serdar v. Turkmenistan, Procedural Order No. 1, May 27, 2026
  • Buried Hill Serdar v. Turkmenistan, Procedural Order No. 2, May 27, 2026
• Cengiz İnşaat Sanayi ve Ticaret A.S v. Libya, ICC Case No. 21537/ZF/AYZ View case details
  1 source document

  • Cengiz İnşaat Sanayi ve Ticaret A.S v. Libya, Award
• DSG Yapi Sanayi Ticaret Anonim Sirketi v. Kingdom of Saudi Arabia, (ICSID Case No. ARB/19/32 View case details
  1 source document

  • DSG Yapi Sanayi Ticaret Anonim Sirketi v. Kingdom of Saudi Arabia, Order Taking Note of the Discontinuance of the Proceeding Pursuant to ICSID Arbitration Rule 43(1)
• Eurofinsa v. Gabon, ICC Case No. 22899/DDA (C-22705/DDA) View case details
  1 source document

  • Award
• Hope Services LLC v. Republic of Cameroon, ICSID Case No. ARB/20/2 View case details
  8 source documents

  • Hope Services LLC v. Republic of Cameroon, Award
  • Hope Services LLC v. Republic of Cameroon, Decision on the Proposal for Disqualification
  • Hope Services LLC v. Republic of Cameroon, ICSID Case No. ARB/20/2, Procedural Order No. 2
  • Hope Services LLC v. Republic of Cameroon, Procedural Order No. 1
  • Hope Services LLC v. Republic of Cameroon, Procedural Order No. 3
  • Hope Services LLC v. Republic of Cameroon, Procedural Order No. 4
  • Hope Services LLC v. Republic of Cameroon, Procedural Order No. 5
  • Hope Services LLC v. Republic of Cameroon, Procedural Order No. 6
• Jan de Nul N.V. and Dredging International N.V. v. Arab Republic of Egypt, ICSID Case No. ARB/04/13 View case details
  2 source documents

  • Jan de Nul N.V. and Dredging International N.V. v. Arab Republic of Egypt, Award
  • Jan de Nul N.V. and Dredging International N.V. v. Arab Republic of Egypt, Decision on Jurisdiction
• Kornikom EOOD v. Republic of Serbia, ARB/19/12 View case details
  1 source document

  • Kornikom EOOD v. Serbia, Award
• Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Case No. 2018-55 View case details
  25 source documents

  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Amended Statement of Claim
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Claimants Counter-Memorial on Preliminary Objections
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Decision on Respondent Preliminary Objections (Redacted)
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Final Award
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Notice of Arbitration and Statement of Claim
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Notice of Intent
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, PCA Press Release
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Procedural Order No. 1
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Procedural Order No. 10
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Procedural Order No. 2
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Procedural Order No. 3
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Procedural Order No. 4
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Rejoinder on Preliminary Objections
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Respondent Reply on Preliminary Objections
  • Mason Capital L.P. and Mason Management LLC v. Republic of Korea, Respondent's Memorial on Preliminary Objections
  • Procedural Order No. 11 (English)
  • Procedural Order No. 11 (Korean)
  • Procedural Order No. 5
  • Procedural Order No. 6
  • Procedural Order No. 7
  • Procedural Order No. 8
  • Procedural Order No. 9
  • Transcript of Hearing on Preliminary Objections - Day One
  • Transcript of Hearing on Preliminary Objections - Day Three
  • Transcript of Hearing on Preliminary Objections - Day Two
• Menzies Middle East and Africa S.A. and Aviation Handling Services International Ltd. v. Republic of Senegal, ICSID Case No. ARB/15/21 View case details
  3 source documents

  • Menzies Middle East and Africa S.A. and Aviation Handling Services International Ltd. v. Republic of Senegal, Award
  • Menzies Middle East and Africa S.A. and Aviation Handling Services International Ltd. v. Republic of Senegal, Procedural Order No. 2
  • Procedural Order No. 1
• Plaza Centers N.V. v. Romania, ICSID Case No. ARB/22/15 View case details
  1 source document

  • Plaza Centers N.V. v. Romania, Request for Arbitration
• Shareholders of SESAM v. Central African Republic, ICSID Case No. CONC/07/01 View case details
  1 source document

  • Shareholders of SESAM v. Central African Republic, Report of the Conciliation Commission (not public)
• Tamagot Bumi S.A. and Bumi Mauritania S.A. v. Islamic Republic of Mauritania, ICSID Case No. ARB/14/23 View case details
  1 source document

  • Tamagot Bumi S.A. and Bumi Mauritania S.A. v. Islamic Republic of Mauritania, Award
• West African Aquaculture Ltd, Kurt Lennart Hansson and Martje Bolt Hansson v. Republic of The Gambia, ICSID Case No. ARB/18/10 View case details
  3 source documents

  • West African Aquaculture Ltd, Kurt Lennart Hansson and Martje Bolt Hansson v. Republic of The Gambia,
  • West African Aquaculture Ltd, Kurt Lennart Hansson and Martje Bolt Hansson v. Republic of The Gambia, Dissenting Opinion by Arbitrator Pierre Mayer
  • West African Aquaculture Ltd, Kurt Lennart Hansson and Martje Bolt Hansson v. Republic of The Gambia, Final Award

Counsel (Respondent side) 4 cases in this role

• Burlington Resources Inc. v. Republic of Ecuador, ICSID Case No. ARB/08/5 (formerly Burlington Resources Inc. and others v. Republic of Ecuador and Empresa Estatal Petróleos del Ecuador (PetroEcuador)) View case details
  1 source document

  • Burlington Resources Inc. v. Republic of Ecuador (formerly Burlington Resources Inc. and others v. Republic of Ecuador and Empresa Estatal Petróleos del Ecuador (PetroEcuador)), Decision on Stay of Enforcement of the Award
• Chevron Corporation and Texaco Petroleum Corporation v. Ecuador (II), PCA Case No. 2009-23 View case details
  10 source documents

  • Chevron Corporation and Texaco Petroleum Corporation v. The Republic of Ecuador, Procedural Order and Further Order on Interim Measures
  • Chevron Corporation and Texaco Petroleum Corporation v. The Republic of Ecuador, Second Partial Award on Track II
  • Chevron Corporation and Texaco Petroleum Corporation v. The Republic of Ecuador, The Aguarico-06 Site Visit
  • Chevron Corporation and Texaco Petroleum Corporation v. The Republic of Ecuador, The Lago Agrio-02 Site Visit
  • Chevron Corporation and Texaco Petroleum Corporation v. The Republic of Ecuador, The Shushufindi-34 Site Visit
  • Chevron Corporation and Texaco Petroleum Corporation v. The Republic of Ecuador, The Shushufindi-55 Site Visit
  • Chevron Corporation and Texaco Petroleum Corporation v. The Republic of Ecuador, Transcripts Track 2 Hearing - Volumes 1 to 13 from 21 April 2015 to 8 May 2015
  • Chevron Corporation and Texaco Petroleum Corporation v. The Republic of Ecuador, UNCITRAL, PCA Case No. 2009-23, Track 2 Supplemental Rejoinder on the Merits of the Republic of Ecuador
  • Chevron v. Ecuador (II), Note of Partial Dissent by Dr. Horacio Grigera Naon
  • Chevron v. Ecuador (II), Fourth Partial Award on Track III
• Glencore International A.G. and C.I. Prodeco S.A. v. Republic of Colombia (I), ICSID Case No. ARB/16/6 View case details
  1 source document

  • Glencore International A.G. and C.I. Prodeco S.A. v. Republic of Colombia, Award
• Perenco Ecuador Ltd. v. Republic of Ecuador and Empresa Estatal Petróleos del Ecuador (Petroecuador), ICSID Case No. ARB/08/6 View case details
  5 source documents

  • Decision on the Stay of Enforcement of the Award
  • Perenco Ecuador Ltd. v. The Republic of Ecuador and Empresa Estatal Petróleos del Ecuador (Petroecuador), Award
  • Perenco Ecuador Ltd. v. The Republic of Ecuador and Empresa Estatal Petróleos del Ecuador (Petroecuador), Decision on Claimant’s Application for Dismissal of Respondent's Counter-claims
  • Perenco Ecuador Ltd. v. The Republic of Ecuador and Empresa Estatal Petróleos del Ecuador (Petroecuador), Decision on Ecuador's Reconsideration Motion
  • Perenco Ecuador Ltd. v. The Republic of Ecuador and Empresa Estatal Petróleos del Ecuador (Petroecuador), Interim Decision on the Environmental Counterclaim

Counsel 1 case in this role

• Veolia Propreté SAS v. Italian Republic, ICSID Case No. ARB/18/20 View case detailsCase-profile record

Legal Expert 1 case in this role

• Serafín García Armas and Karina García Gruber v. Bolivarian Republic of Venezuela, PCA Case No. 2013-3 View case detailsCase-profile record