Elena Oñoro Sainz

Participant Type: 

Individual

Involved in 34 cases (33 International Investment Agreement (Investor–State) · 3 Investment Protection Disputes) · evidenced by 95 case documents on record

Counsel (Respondent side) 32 cases in this role

• 9REN Holding S.a.r.l v. Kingdom of Spain, ICSID Case No. ARB/15/15 View case details
  2 source documents

  • 9REN Holding S.a.r.l v. Kingdom of Spain, Award
  • 9REN Holding S.a.r.l v. Spain, Decision on Annulment
• AES Solar and others (PV Investors) v. Kingdom of Spain, PCA Case No. 2012-14 View case details
  1 source document

  • Final Award, including Concurring and Dissenting Opinion of Charles N. Brower
• BayWa r.e. Renewable Energy GmbH and BayWa r.e. Asset Holding GmbH v. Spain,  ICSID Case No. ARB/15/16 View case details
  1 source document

  • BayWa r.e. Renewable Energy GmbH and BayWa r.e. Asset Holding GmbH v. Spain, Award of the Tribunal
• Canepa Green Energy Opportunities I, S.á r.l. and Canepa Green Energy Opportunities II, S.á r.l. v. Kingdom of Spain, ICSID Case No. ARB/19/4 View case details
  1 source document

  • Canepa Green Energy Opportunities I, S.á r.l. and Canepa Green Energy Opportunities II, S.á r.l. v. Kingdom of Spain, Award
• Cavalum SGPS, S.A. v. Kingdom of Spain, ICSID Case No. ARB/15/34 View case details
  6 source documents

  • Cavalum SGPS, S.A. v. Kingdom of Spain, Decision on the Kingdom of Spain's request for reconsideration
  • Cavalum SGPS, S.A. v. Kingdom of Spain, Procedural Order No. 6 (Second Decision on Reconsideration)
  • Cavalum SGPS, S.A. v. Kingdom of Spain, Decision on Jurisdiction, Liability and Directions on Quantum
  • Cavalum SGPS, S.A. v. Kingdom of Spain, Dissenting Opinion of David R. Haigh
  • Cavalum SPGS v. Spain, Award, September 26, 2022
  • Cavalum SPGS v. Spain, Decision on Annulment, December 23, 2025
• Cube Infrastructure Fund SICAV and others v. Kingdom of Spain, ICSID Case No. ARB/15/20 View case details
  5 source documents

  • Cube Infrastructure Fund SICAV and others v. Kingdom of Spain, Decision on Jurisdiction, Liability and Partial Decision on Quantum
  • Cube Infrastructure Fund SICAV and others v. Kingdom of Spain, Decision on the Continuation of the Provisional Stay of Enforcement of the Award
  • Cube Infrastructure Fund SICAV and others v. Kingdom of Spain, Decision on the EU Commission's Application for Leave to Intervene as a Non-Disputing Party
  • Cube Infrastructure Fund SICAV and others v. Kingdom of Spain, Final Award
  • Cube Infrastructure Fund SICAV and others v. Kingdom of Spain, Separate and Partial Dissenting Opinion of Professor Christian Tomuschat
• DCM Energy GmbH & Co. Solar 1 KG and others v. Kingdom of Spain, ICSID Case No. ARB/17/41 View case details
  2 source documents

  • italaw180906 - DCM Energy v. Spain, Award, September 8, 2025
  • italaw180906 - DCM Energy v. Spain, Decision on Jurisdiction, Liability and Quantum Principles, September 30, 2024
• EBL (Genossenschaft Elektra Baselland) and Tubo Sol PE2 S.L. v. Kingdom of Spain, ICSID Case No. ARB/18/42 View case details
  2 source documents

  • EBL and Tubo Sol v. Spain, Award
  • EBL and Tubo Sol v. Spain, Partial Dissenting Opinion of Bo Nilsson
• Eiser Infrastructure Limited and Energía Solar Luxembourg S.à r.l. v. Kingdom of Spain, ICSID Case No. ARB/13/36 View case details
  3 source documents

  • Eiser Infrastructure Limited and Energía Solar Luxembourg S.à r.l. v. Kingdom of Spain, Application Pursuant to Article 49(2) of the ICSID Convention
  • Eiser Infrastructure Limited and Energía Solar Luxembourg S.à r.l. v. Kingdom of Spain, Decision on annulment
  • Eiser Infrastructure Limited and Energía Solar Luxembourg S.à r.l. v. Kingdom of Spain, Final Award
• Eurus Energy Holdings Corporation v. Kingdom of Spain, ICSID Case No. ARB/16/4 View case details
  7 source documents

  • Eurus Energy Holdings Corporation v. Kingdom of Spain, Award
  • Eurus Energy Holdings Corporation v. Kingdom of Spain, Decision on Jurisdiction and Liability
  • Eurus Energy Holdings Corporation v. Kingdom of Spain, Decision on Lifting the Stay of Enforcement
  • Eurus Energy Holdings Corporation v. Kingdom of Spain, Decision on Rectification
  • Eurus Energy Holdings Corporation v. Kingdom of Spain, Decision on the Request to Continue the Stay of Enforcement of the Award
  • Eurus Energy Holdings Corporation v. Kingdom of Spain, Partial Dissent by Oscar M. Garibaldi
  • Eurus Energy Holdings Corporation v. Kingdom of Spain, Petition to Enforce Arbitral Award
• FREIF Eurowind Holdings Ltd. v. Kingdom of Spain, SCC Case No. 2017/060 View case details
  1 source document

  • FREIF Eurowind Holdings Ltd. v. Kingdom of Spain, Final Award
• Foresight Luxembourg Solar 1 S. Á.R1. and others v. Kingdom of Spain, SCC Case No. 2015/150 View case details
  7 source documents

  • Foresight Luxembourg Solar 1 S. Á.R1. and others v. Kingdom of Spain, Claimants' Reply Post-Hearing Brief
  • Foresight Luxembourg Solar 1 S. Á.R1. and others v. Kingdom of Spain, Claimants' Response to Request for Correction of Final Award
  • Foresight Luxembourg Solar 1 S. Á.R1. and others v. Kingdom of Spain, Counter-Memorial on the Merits and Memorial on Jurisdictional Objections
  • Foresight Luxembourg Solar 1 S. Á.R1. and others v. Kingdom of Spain, Procedural Order No. 4
  • Foresight Luxembourg Solar 1 S. Á.R1. and others v. Kingdom of Spain, Rejoinder on the Merits and Reply on Jurisdiction
  • Foresight Luxembourg Solar 1 S. Á.R1. and others v. Kingdom of Spain, Respondent's Post-Hearing Brief
  • Foresight Luxembourg Solar 1 S. Á.R1., et al. v. Kingdom of Spain, Final Award and Partial Dissenting Opinion of Arbitrator Raül Vinuesa
• Infracapital F1 S.à r.l. and Infracapital Solar B.V. v. Kingdom of Spain, ICSID Case No. ARB/16/18 View case details
  3 source documents

  • Infracapital F1 S.à r.l. and Infracapital Solar B.V. v. Kingdom of Spain, Decision on Jurisdiction, Liability and Directions on Quantum
  • Infracapital F1 S.à r.l. and Infracapital Solar B.V. v. Kingdom of Spain, Partial Dissenting Opinion By Professor Peter D Cameron
  • Infracapital v. Spain, Award
• Infrastructure Services Luxembourg S.à.r.l. and Energia Termosolar B.V. (formerly Antin Infrastructure Services Luxembourg S.à.r.l. and Antin Energia Termosolar B.V.)​ v. Kingdom of Spain, ICSID Case No. ARB/13/31 View case details
  3 source documents

  • Antin Infrastructure Services Luxembourg S.à.r.l. and Antin Energia Termosolar B.V. v. Kingdom of Spain, Award
  • Antin Infrastructure Services Luxembourg S.à.r.l. and Antin Energia Termosolar B.V. v. Kingdom of Spain, Decision on the Continuation of the Provisional Stay of Enforcement of the Award
  • Infrastructure Services Luxembourg S.à.r.l. and Energia Termosolar B.V. (formerly Antin Infrastructure Services Luxembourg S.à.r.l. and Antin Energia Termosolar B.V.)​ v. Kingdom of Spain, Decision on Rectification of the Award
• JGC Holdings Corporation (formerly JGC Corporation) v. Kingdom of Spain, ICSID Case No. ARB/15/27 View case details
  3 source documents

  • JGC Holdings Corporation (formerly JGC Corporation) v. Kingdom of Spain, Award
  • JGC Holdings Corporation (formerly JGC Corporation) v. Kingdom of Spain, Decision on Annulment
  • JGC Holdings Corporation (formerly JGC Corporation) v. Kingdom of Spain, Decision on Jurisdiction, Liability, and Quantum
• KS Invest GmbH and TLS Invest GmbH v. Kingdom of Spain, ICSID Case No. ARB/15/25 View case details
  2 source documents

  • KS Invest GmbH and TLS Invest GmbH v. Kingdom of Spain, Decision on Proposal to Disqualify Kaj Hober
  • KS Invest GmbH and TLS Invest GmbH v. Kingdom of Spain, Decision on the Proposal to Disqualify Gary Born
• Landesbank Baden-Württemberg and others v. Kingdom of Spain, ICSID Case No. ARB/15/45 View case details
  1 source document

  • Landesbank Baden-Württemberg and others v. Kingdom of Spain, Decision on the Intra-EU Jurisdictional Objection
• Masdar Solar & Wind Cooperatief U.A. v. Kingdom of Spain, ICSID Case No. ARB/14/1 View case details
  2 source documents

  • Masdar Solar & Wind Cooperatief U.A. v. Kingdom of Spain, Award
  • Masdar Solar & Wind Cooperatief U.A. v. Kingdom of Spain, Decision on the Respondent's Application to Stay Enforcement of the Award
• Mathias Kruck and others v. Kingdom of Spain, ICSID Case No. ARB/15/23 View case details
  5 source documents

  • Decision on Jurisdiction, Liability and Principles of Damages
  • Kruck and others v. Spain, Award
  • Mathias Kruck and others v. Kingdom of Spain, Decision on the Proposal to Disqualify Mr. Gary B. Born
  • italaw180993 - Kruck and others v. Spain, Decision on Annulment, December 22, 2025
  • italaw180994 - Kruck and others v. Spain, Decision on Jurisdiction and Admissibility, April 19, 2021
• NextEra Energy Global Holdings B.V. and NextEra Energy Spain Holdings B.V. v. Kingdom of Spain, ICSID Case No. ARB/14/11 View case details
  5 source documents

  • NextEra Energy Global Holdings B.V. and NextEra Energy Spain Holdings B.V. v. Kingdom of Spain,
  • NextEra Energy Global Holdings B.V. and NextEra Energy Spain Holdings B.V. v. Kingdom of Spain, Decision on Annulment
  • NextEra Energy Global Holdings B.V. and NextEra Energy Spain Holdings B.V. v. Kingdom of Spain, Decision on Jurisdiction, Liability and Quantum Principles
  • NextEra Energy Global Holdings B.V. and NextEra Energy Spain Holdings B.V. v. Kingdom of Spain, Final Award
  • Procedural Order No. 1
• Novenergia II - Energy & Environment (SCA) (Grand Duchy of Luxembourg), SICAR v. Kingdom of Spain, SCC Case No. 2015/063 View case details
  3 source documents

  • Novenergia II - Energy & Environment (SCA) (Grand Duchy of Luxembourg), SICAR v. Kingdom of Spain, Procedural Order No. 12
  • Novenergia II - Energy & Environment (SCA) (Grand Duchy of Luxembourg), SICAR v. Kingdom of Spain, Procedural Order No. 13
  • Novenergia II - Energy & Environment (SCA) (Grand Duchy of Luxembourg), SICAR v. The Kingdom of Spain, Award
• Nurhima Kiram Fornan and others v. Kingdom of Spain, ICSID Case No. ARB/24/45 View case details
  1 source document

  • Nurhima Kiram Fornan and others v. Kingdom of Spain, Award (Redacted)
• OperaFund Eco-Invest SICAV PLC and Schwab Holding AG v. Kingdom of Spain, ICSID Case No. ARB/15/36 View case details
  4 source documents

  • OperaFund Eco-Invest SICAV PLC and Schwab Holding AG v. Kingdom of Spain, Decision on Rectification of the Award
  • OperaFund Eco-Invest SICAV PLC and Schwab Holding AG v. Kingdom of Spain, Decision on the Request for the Continuation of the Stay of Enforcement of the Award
  • OperaFund Eco-Invest SICAV PLC and Schwab Holding AG v. Kingdom of Spain, Dissenting Opinion by Philippe Sands on Liability and Quantum
  • OperaFund Eco-Invest SICAV PLC and Schwab Holding AG v. Kingdom of Spain, Final Award
• RENERGY S.à r.l. v. Kingdom of Spain, ICSID Case No. ARB/14/18 View case details
  3 source documents

  • RENERGY S.à r.l. v. Kingdom of Spain, Award
  • RENERGY S.à r.l. v. Kingdom of Spain, Decision on Annulment
  • RENERGY S.à r.l. v. Kingdom of Spain, Dissent on Liability and Quantum
• RREEF Infrastructure (G.P.) Limited and RREEF Pan-European Infrastructure Two Lux S.à r.l. v. Kingdom of Spain, ICSID Case No. ARB/13/30 View case details
  3 source documents

  • RREEF Infrastructure (G.P.) Limited and RREEF Pan-European Infrastructure Two Lux S.à r.l. v. Kingdom of Spain, Award
  • RREEF Infrastructure (G.P.) Limited and RREEF Pan-European Infrastructure Two Lux S.à r.l. v. Kingdom of Spain, Decision on Jurisdiction
  • RREEF Infrastructure (G.P.) Limited and RREEF Pan-European Infrastructure Two Lux S.à r.l. v. Kingdom of Spain, Decision on Responsibility and on the Principles of Quantum
• RWE Innogy GmbH and RWE Innogy Aersa S.A.U. v. Kingdom of Spain, ICSID Case No. ARB/14/34 View case details
  1 source document

  • RWE Innogy GmbH and RWE Innogy Aersa S.A.U. v. Kingdom of Spain, Decision on jurisdiction, liability and certain issues of quantum
• STEAG GmbH v. Kingdom of Spain, ICSID Case No. ARB/15/4 View case details
  5 source documents

  • Decision on Jurisdiction, Liability and Principles of Quantum
  • STEAG GmbH v. Kingdom of Spain, Award
  • STEAG GmbH v. Kingdom of Spain, Decision on Annulment
  • STEAG GmbH v. Kingdom of Spain, Dissenting Opinion of Pierre-Marie Dupuy
  • STEAG GmbH v. Kingdom of Spain, Supplementary Decision
• Sapec, S.A. v. Kingdom of Spain, ICSID Case No. ARB/19/23 View case details
  1 source document

  • Sapec, S.A. v. Kingdom of Spain, Decision on the Proposal for Disqualification of Judge James Spigelman
• Sevilla Beheer B.V. and others v. Kingdom of Spain, ICSID Case No. ARB/16/27 View case details
  1 source document

  • Sevilla Beheer and others v. Spain, Decision on Annulment, June 11, 2025
• SolEs Badajoz GmbH v. Kingdom of Spain, ICSID Case No. ARB/15/38 View case details
  2 source documents

  • SolEs Badajoz GmbH v. Kingdom of Spain, Award
  • SolEs Badajoz GmbH v. Kingdom of Spain, Decision on the Continuation of the Stay of Enforcement of the Award
• VM Solar Jerez GmbH and others v. Kingdom of Spain, ICSID Case No. ARB/19/30 View case details
  1 source document

  • Decision on the Proposal for Disqualification of Guido Santiago Tawil
•  Watkins Holdings S.à r.l. and others v. Kingdom of Spain, ICSID Case No. ARB/15/44 View case details
  5 source documents

  • Watkins Holdings S.à r.l. and others v. Kingdom of Spain, Award
  • Watkins Holdings S.à r.l. and others v. Kingdom of Spain, Decision on Annulment
  • Watkins Holdings S.à r.l. and others v. Kingdom of Spain, Decision on the Claimants’ Preliminary Objections Pursuant to ICSID Arbitration Rule 41(5)
  • Watkins Holdings S.à r.l. and others v. Kingdom of Spain, Dissent on Liability and Quantum of Prof. Dr. Hélène Ruiz Fabri
  • Watkins Holdings S.à r.l. and others v. Kingdom of Spain, Decision on Spain's Request for Rectification of the Award

Counsel 2 cases in this role

• InfraRed Environmental Infrastructure GP Limited and others v. Kingdom of Spain, ICSID Case No. ARB/14/12, ICSID Case No. ARB/14/12 View case detailsCase-profile record
• Littop Enterprises Limited, Bridgemont Ventures Limited and Bordo Management Limited v. Ukraine, SCC Case No. V 2015/092 View case detailsCase-profile record