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Anna Howell

Partner

伦敦

Anna, global head of Orrick’s oil & gas practice, guides industry leaders through complex, cross-border transactions that fuel growth. With deep proficiency across oil & gas, LNG, energy transition, power, mining and infrastructure, Anna helps clients capitalize on opportunities, manage risk and close high-stakes deals worldwide.

Anna’s experience spans M&A, project development and financing, joint ventures, market entry and expansion, and restructurings in Europe, Africa, Latin America, Asia Pacific and the Middle East. She offers clients a comprehensive understanding of the entire energy value chain – from upstream concessions and transportation arrangements to downstream commodity sales and trading. Anna is known for guiding clients through their most challenging and transformative matters, driving results in both mature and emerging markets.

Highly regarded in the market, Anna holds a Band 1 ranking from Chambers Global and Chambers UK in Oil & Gas. Clients praise her as “one of the standout energy lawyers both for M&A and oil and gas work,” noting her intelligent and commercial approach to negotiations and consistent, client-focused communication.

Prior to joining Orrick, Anna spent over 11 years practising in Asia and has worked in London, Singapore, Hong Kong and Beijing.

“Anna is dedicated to providing a high level of service that is focused on achieving the goals of the client." – Chambers UK 2026

  • Oil & Gas

    • KKR on the sale by auction of Acteon Group.
    • ADNOC on its joint venture with bp for gas development in areas of mutual interest, including the contribution by bp to the JV of its interests in the Shorouk, North Damietta, North El Burg, North El Tabya, Bellatrix-Seti East and North El Fayrouz concessions in Egypt.
    • Marathon Oil on the disposal of its entire UK North Sea oil and gas portfolio to RockRose Energy plc.
    • Marubeni on the auction sale of its entire UK North Sea business to Ithaca Energy.
    • A financial adviser in connection with the Shell/Equinor combination creating Adura.
    • Kerogen on its acquisition by share subscription of an approximate 28% equity interest in iGas Energy plc, an onshore oil and gas production company in the UK for US$35 million and the restructuring of iGas’s Norwegian bonds through cash buy-backs and debt to equity exchanges.
    • E.ON in relation to the sale of its shares in its UK E&P upstream portfolio comprising equity interests in 80 licenses and acting as English counsel on the sale of E.ON’s Norway E&P business for US$1.6 billion to LetterOne.
    • Carlyle International Energy Partners, part of the Carlyle Group, on its agreement to purchase the entire Romanian business of Sterling Resources, including the release of security given pursuant to Sterling’s Norwegian Bonds and subsequently on further equity arrangements.
    • bp on its acquisition of additional interests in the West Nile Delta project offshore Egypt.
    • CNPC on its acquisition of a 28.57% stake in Eni East Africa Company, a wholly owned subsidiary of Eni SpA, for US$4.2 billion. As a result of this transaction, CNPC will indirectly hold a 20% stake in Rovuma Offshore Area 4 in Mozambique.
    • Various companies including oil majors and private equity funds on UKCS decommissioning advice including on bilateral and field-wide decommissioning security agreements.
    • Noble Corporation on the disposal of drilling rigs to Borr Drilling Limited.
    • Ensco on the disposal of drilling rigs to Ades Holding Company.

    LNG

    • ADNOC Trading on its 20-year LNG SPA with Next Decade for 1.9 mtpa of lower-carbon LNG on a FOB basis from the Rio Grande LNG facility in Brownsville, Texas.
    • Wholly owned subsidiaries of Marathon Oil Corporation on a five-year LNG SPA with Glencore Energy UK sourced from their interests in the Alba Unit in Equatorial Guinea.
    • MGEN Gas Energy Holdings on proposed LNG sale and purchase arrangements in connection with the Batangas LNG regasification to power facility.
    • Mozambique LNG, whose sponsors include Anadarko Petroleum Corporation, Mitsui & Co., Ltd., PTTEP, ONGC Videsh, Bharat PetroResources, Oil India and ENH, on a long-term LNG sale and purchase agreement for the sale of 1 million tonnes per annum of LNG to PT Pertamina (Persero).
    • Nauticor on a long-term LNG SPA with Novotek for supplies from Vostok’s LNG.
    • Nauticor on agreements for the sale of bunker fuel via ship and truck.
    • Berkshire Hathaway Energy Co. in its acquisition of limited partnership interests in Cove Point LNG from Dominion Energy, Inc.
    • CNPC on its acquisition of a stake in the Yamal LNG project from Novatek.
    • A confidential company on a time charter agreement for a FSRU in the Baltic.
    • CNOOC on the Queensland Curtis coal bed methane LNG (QCLNG) project in Australia in relation to its purchase of 3.6 mtpa and 5 mtpa of LNG from BG and its acquisition of upstream and midstream interests in the QCLNG project, including the development and negotiation of the gas sales, processing, common facilities and operating agreements, the LNG SPA for FOB sales, and a long-term gas transportation agreement and pipeline system rules.

    Power, Mining & Infrastructure

    • ArcelorMittal on the acquisition of a 28.4% stake in Vallourec SA from Apollo.
    • Asterion Industrial Partners on its acquisition from TotalEnergies of a 50% stake in Compagnie Electrique de Bretagne which owns a 448 MW CCGT in Landivisiau, France, including the route to market arrangements.
    • KKR on the potential acquisition of a stake in Stegra, the hydrogen green steel project in Sweden.
    • KKR on the potential acquisition of a gigafactory in France.
    • An infrastructure fund on the potential acquisition of Calisen, a UK smart metering business.
    • A PE fund on the potential acquisition of Brush Group from One Equity.
    • A confidential company on the potential acquisition of Solenergi from Actis.
    • A strategic company on the potential acquisition of John Lawrie Tubulars.
    • A confidential company in relation to their intended purchase of an English distribution system operator and the structuring of the same, including in relation to associated tariff issues and on UK and EU regulatory issues.

    Anna’s experience includes that prior to joining Orrick.