Department profile
A&O Shearman

Energy & Natural Resources

Europe Guide 2026 : Spain

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A&O Shearman

Rankings

Chambers Review

Provided by Chambers

Energy & Natural Resources - Spain

Band 1

What the Team is Known For

A&O Shearman is an international firm taking a multidisciplinary approach to energy and natural resources matters, being singled out for noteworthy strength in cross-border transactions. The practice has a particular focus on international arbitration, maintaining an excellent market reputation for its representation of claimants in cases against the Kingdom of Spain. The firm's activity extends into the transactional energy space, frequently representing buyers and sellers in M&A deals, including financing. The team possesses noteworthy expertise in renewable energy sources, advising a host of suppliers. The energy practice also draws upon other departments of the firm, such as M&A or antitrust, to fully support clients' needs.

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Work Highlights

Provided by Chambers

  • A&O Shearman advised China Three Gorges on its EUR550 million acquisition of NCP Mula Solar.

Strengths

Provided by Chambers

  • A&O Shearman have extensive sector knowledge and enormous capacity to provide creative solutions to complex matters. I would also highlight their great empathy to understand our needs and concerns.

    Energy & Natural Resources respondentEurope

  • The firm has partner involvement, coordination with different jurisdictions and experience in energy transactions. They are dedicated, available, rigorous and have extensive technical knowledge.

    Energy & Natural Resources respondentEurope

  • A&O Shearman have extensive knowledge of the energy market and are a team oriented on quality and customer satisfaction.

    Energy & Natural Resources respondentEurope

  • A&O Shearman is my number one firm, able to negotiate and explain risks and considerations. I love how they work, leading the process well and seeing valuable solutions.

    Energy & Natural Resources respondentEurope

  • The team are exceptional, distinguished by a remarkable ability to offer innovative solutions, which is crucial.

    Energy & Natural Resources respondentEurope

Notable Practitioners

Provided by Chambers

  • David Diez
    David Diez

    David Diez

    David Diez acts for domestic and international energy companies and investment funds on project financings and asset deals, as well as in contentious-administrative proceedings.

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  • Vanessa Cuellas
    Vanessa Cuellas

    Vanessa Cuellas

    Vanessa Cuellas is well reputed for her handling of lender and borrower-side financings in the energy space, with a focus on project development and financing.

    • Vanessa is undoubtedly an energy expert and one of our key lawyers. Her dedication is impressive, as she consistently delivers above and beyond expectations, always giving 200%.

      Energy & Natural Resources respondentEurope

    • She is technically skilled, knows how to lead the process and is always able to think outside the box and come up with creative solutions that suit us.

      Energy & Natural Resources respondentEurope

    • Vanessa is results-oriented and understands her clients' needs. She supports us and gives good quality advice, always looking for the best solutions.

      Energy & Natural Resources respondentEurope

    • Vanessa stands out for her total dedication and incredible knowledge of our internal processes. She conveys full confidence and security and excels in coordinating teams from different jurisdictions.

      Energy & Natural Resources respondentEurope
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  • Antonio Vázquez-Guillén
    Antonio Vázquez-Guillén

    Antonio Vázquez-Guillén

    Antonio Vazquez-Guillén acts for energy corporations and investors on high-profile contentious international and domestic mandates. He also assists with regulatory matters.

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  • Ignacio Hornedo
    Ignacio Hornedo

    Ignacio Hornedo

    Ignacio Hornedo acts for corporate and investor clients on a range of renewable energy and carbon capture transactions. He offers additional experience in the mining and extractive industries.

    • Ignacio knows the market well, particularly the specificities of energy transactions, which gives us great calm.

      Energy & Natural Resources respondentEurope
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Ranked Individuals at A&O Shearman (4)

Spain

A&O Shearman has rankings in the following guides

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