The scope of the contract is organisational consulting for TenneT Holding B.V. and all Dutch entities of TenneT Holding B.V. Organisational consulting consists of knowledge, advice and support on organisational topics, such as (not limited to) -Strategy -Operating model and organisational design -Transformation and change management -Innovation -Business improvement and process optimisation -Policy development and implementation -Data, digital and AI strategy, governance and implementation -Supply chain management -Finance, risk and control -Performance management -Human resources and workforce-related topics TenneT has structured the scope of this framework agreement into the following lots: 1. Strategic advice on organisation level 2. Large change projects and implementations on division and enabling unit level 3. Advice and process optimisation – Lot nr.: 1 Strategic advice on organisation level Lot 1 concerns boardroom consulting and organisation-level advisory services, such as: • Advice at Executive Board and Executive Committee level, including solution development and intervention design • Support on strategic and business-critical issues from the Executive Committee • Conceptual advisory work on complex topics, including outside-in perspectives and benchmarking • Advice on strategy, strategy development and market positioning • Advice on business performance, innovation, performance management and strategic choices • Advice on organisational design, including structure, operating model, governance choices and integration/separation logic • Advice on organisation-wide and cross-divisional governance, transformation and interface topics Type of contract: Services Authority: TenneT TSO B.V. Document URL: https://s2c.mercell.com/today/236588 Duration contract start date : 07/15/2027 00:00:00 – Lot nr.: 2 Large change projects and implementations on division and enabling unit level Lot 2 concerns strategy-to-delivery transformation support services, from strategic concept to business implementation, for example: • Advice and support at director, management, and program management levels • Design and delivery of strategy and business transformation programmes • Translation of strategic and tactical priorities into actionable plans, roadmaps and delivery governance • Design and delivery support for innovation programmes, including mobilisation, piloting, scaling and embedding in the business • Support for large-scale and complex change requiring both conceptual strength and implementation drive • Digital and data transformation support, including digital strategy, data strategy, IT roadmaps and analytics-related change • Support on operating model, organisational and process changes with significant business impact • Support on business performance and operational excellence, including core process optimisation, cost efficiency and performance management • Support on governance, risk and control topics, including decision-making structures, compliance and internal control Type of contract: Services Authority: TenneT TSO B.V. Document URL: https://s2c.mercell.com/today/236588 Duration contract start date : 07/15/2027 00:00:00 – Lot nr.: 3 Advice and process optimisation Lot 3 concerns hands-on business implementation, operational improvement and adoption support within divisions and enabling units, such as: • Advice and support at management team level, within a division or enabling unit • Support with improvement and transformation issues, with a focus on implementation • Translation of strategy into execution o Operationalization of strategic choices in processes or working methods o Development of concrete improvement roadmaps and implementation plans within a domain/department • Business performance and operational excellence o Improvement of operational performance, costs, and productivity o Design and optimization of performance management and KPI structures • Processes, chains, and supply chain o Analysis and redesign of end-to-end processes o Optimization of supply chain, operations, and service delivery • Organisation, leadership, and change o Setting up teams, roles, and responsibilities o Guiding change, leadership, and adoption in the line • Data, analytics, and digital support o Use of data and analytics to support decision-making o Improvement of digital support for processes (without heavy IT implementations) • Program and improvement management o Setting up and guiding improvement and transformation programs o Coaching management and teams during implementation Type of contract: Services Authority: TenneT TSO B.V. Document URL: https://s2c.mercell.com/today/236588 Duration contract start date : 07/15/2027 00:00:00

Organisational consulting

The scope of the contract is organisational consulting for TenneT Holding B.V. and all Dutch entities of TenneT Holding B.V. Organisational consulting consists of knowledge, advice and support on organisational topics, such as (not limited to) -Strategy -Operating model and organisational design -Transformation and change management -Innovation -Business improvement and process optimisation -Policy development and implementation -Data, digital and AI strategy, governance and implementation -Supply chain management -Finance, risk and control -Performance management -Human resources and workforce-related topics TenneT has structured the scope of this framework agreement into the following lots: 1. Strategic advice on organisation level 2. Large change projects and implementations on division and enabling unit level 3. Advice and process optimisation – Lot nr.: 1 Strategic advice on organisation level Lot 1 concerns boardroom consulting and organisation-level advisory services, such as: • Advice at Executive Board and Executive Committee level, including solution development and intervention design • Support on strategic and business-critical issues from the Executive Committee • Conceptual advisory work on complex topics, including outside-in perspectives and benchmarking • Advice on strategy, strategy development and market positioning • Advice on business performance, innovation, performance management and strategic choices • Advice on organisational design, including structure, operating model, governance choices and integration/separation logic • Advice on organisation-wide and cross-divisional governance, transformation and interface topics Type of contract: Services Authority: TenneT TSO B.V. Document URL: https://s2c.mercell.com/today/236588 Duration contract start date : 07/15/2027 00:00:00 – Lot nr.: 2 Large change projects and implementations on division and enabling unit level Lot 2 concerns strategy-to-delivery transformation support services, from strategic concept to business implementation, for example: • Advice and support at director, management, and program management levels • Design and delivery of strategy and business transformation programmes • Translation of strategic and tactical priorities into actionable plans, roadmaps and delivery governance • Design and delivery support for innovation programmes, including mobilisation, piloting, scaling and embedding in the business • Support for large-scale and complex change requiring both conceptual strength and implementation drive • Digital and data transformation support, including digital strategy, data strategy, IT roadmaps and analytics-related change • Support on operating model, organisational and process changes with significant business impact • Support on business performance and operational excellence, including core process optimisation, cost efficiency and performance management • Support on governance, risk and control topics, including decision-making structures, compliance and internal control Type of contract: Services Authority: TenneT TSO B.V. Document URL: https://s2c.mercell.com/today/236588 Duration contract start date : 07/15/2027 00:00:00 – Lot nr.: 3 Advice and process optimisation Lot 3 concerns hands-on business implementation, operational improvement and adoption support within divisions and enabling units, such as: • Advice and support at management team level, within a division or enabling unit • Support with improvement and transformation issues, with a focus on implementation • Translation of strategy into execution o Operationalization of strategic choices in processes or working methods o Development of concrete improvement roadmaps and implementation plans within a domain/department • Business performance and operational excellence o Improvement of operational performance, costs, and productivity o Design and optimization of performance management and KPI structures • Processes, chains, and supply chain o Analysis and redesign of end-to-end processes o Optimization of supply chain, operations, and service delivery • Organisation, leadership, and change o Setting up teams, roles, and responsibilities o Guiding change, leadership, and adoption in the line • Data, analytics, and digital support o Use of data and analytics to support decision-making o Improvement of digital support for processes (without heavy IT implementations) • Program and improvement management o Setting up and guiding improvement and transformation programs o Coaching management and teams during implementation Type of contract: Services Authority: TenneT TSO B.V. Document URL: https://s2c.mercell.com/today/236588 Duration contract start date : 07/15/2027 00:00:00

Strategic advice on organisation level

Lot 1 concerns boardroom consulting and organisation-level advisory services, such as: • Advice at Executive Board and Executive Committee level, including solution development and intervention design • Support on strategic and business-critical issues from the Executive Committee • Conceptual advisory work on complex topics, including outside-in perspectives and benchmarking • Advice on strategy, strategy development and market positioning • Advice on business performance, innovation, performance management and strategic choices • Advice on organisational design, including structure, operating model, governance choices and integration/separation logic • Advice on organisation-wide and cross-divisional governance, transformation and interface topics

Large change projects and implementations on division and enabling unit level

Lot 2 concerns strategy-to-delivery transformation support services, from strategic concept to business implementation, for example: • Advice and support at director, management, and program management levels • Design and delivery of strategy and business transformation programmes • Translation of strategic and tactical priorities into actionable plans, roadmaps and delivery governance • Design and delivery support for innovation programmes, including mobilisation, piloting, scaling and embedding in the business • Support for large-scale and complex change requiring both conceptual strength and implementation drive • Digital and data transformation support, including digital strategy, data strategy, IT roadmaps and analytics-related change • Support on operating model, organisational and process changes with significant business impact • Support on business performance and operational excellence, including core process optimisation, cost efficiency and performance management • Support on governance, risk and control topics, including decision-making structures, compliance and internal control

Advice and process optimisation

Lot 3 concerns hands-on business implementation, operational improvement and adoption support within divisions and enabling units, such as: • Advice and support at management team level, within a division or enabling unit • Support with improvement and transformation issues, with a focus on implementation • Translation of strategy into execution o Operationalization of strategic choices in processes or working methods o Development of concrete improvement roadmaps and implementation plans within a domain/department • Business performance and operational excellence o Improvement of operational performance, costs, and productivity o Design and optimization of performance management and KPI structures • Processes, chains, and supply chain o Analysis and redesign of end-to-end processes o Optimization of supply chain, operations, and service delivery • Organisation, leadership, and change o Setting up teams, roles, and responsibilities o Guiding change, leadership, and adoption in the line • Data, analytics, and digital support o Use of data and analytics to support decision-making o Improvement of digital support for processes (without heavy IT implementations) • Program and improvement management o Setting up and guiding improvement and transformation programs o Coaching management and teams during implementation