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Sian Williams

""
  1. People

Sian Williams

Sian Williams

Partner


London
""
  1. People

Sian Williams

Sian Williams

Partner


London

Sian Williams

Partner

London

T: +44 (0) 20 3400 4077

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  • Biography

  • Experience

  • Resources

Biography

When clients are evaluating transformative and complex transactions, often with a cross-border dimension, they rely on Sian Williams. With over 15 years of experience, Sian is well-versed in advising corporates, private equity sponsors, financial institutions, investee companies and founders on a range of strategic M&A transactions across the business life-cycle, including mergers and acquisitions, public takeovers, complex carve‑outs, joint ventures and cross‑border disposals and acquisitions. Additionally, her extensive capital markets experience, including IPOs, secondary offerings and equity‑linked transactions, enables her to provide integrated, holistic advice to listed clients and public‑company boards, particularly where M&A and equity capital considerations intersect.

Sian works with clients across various industries, with a particular focus in the energy, technology, real estate and life sciences sectors. Her practice spans significant multi‑jurisdictional mandates across the UK, US, Middle East and Africa. Sian has acted on landmark transactions ranging from multi‑billion‑pound public takeovers and strategic combinations to intricate asset sales and joint ventures for leading global corporates such as BP, UPS, GE Healthcare, Avnet and Marriott International. Clients value her ability to manage complex deal dynamics, anticipate regulatory and execution challenges, and deliver commercially grounded solutions.

Sian has been recognised for her high-quality legal work and valuable strategic advice by reputable publications such as The Legal 500 UK and Legal Business Awards.

Civic Involvement & Honors

  • Recognised in The Legal 500 UK, as a "Next Generation Partner" for Corporate & Commercial, 2022-2025
  • Awarded 'Highly Commended' in "Corporate Team of the Year" by Legal Business Awards, 2020
  • Awarded "Corporate Team of the Year" by Legal Business Awards, 2019

Admissions

  • England and Wales

Related Capabilities

Renewables & Storage Renewables & Storage

Power Power

M&A & Corporate Finance M&A & Corporate Finance

UK Public Company UK Public Company

Private Equity Private Equity

Securities & Corporate Governance Securities & Corporate Governance

Carve-outs & Transitions Carve-outs & Transitions

Energy Transition Energy Transition

Oil, Gas & Sustainable Fuels Oil, Gas & Sustainable Fuels

Corporate Real Estate & Funds Corporate Real Estate & Funds

Healthcare & Life Sciences Healthcare & Life Sciences

Renewables & Storage Renewables & Storage

Power Power

M&A & Corporate Finance M&A & Corporate Finance

UK Public Company UK Public Company

Private Equity Private Equity

Securities & Corporate Governance Securities & Corporate Governance

Carve-outs & Transitions Carve-outs & Transitions

Energy Transition Energy Transition

Oil, Gas & Sustainable Fuels Oil, Gas & Sustainable Fuels

Corporate Real Estate & Funds Corporate Real Estate & Funds

Healthcare & Life Sciences Healthcare & Life Sciences

Renewables & Storage Renewables & Storage

Power Power

  • M&A & Corporate Finance

  • UK Public Company

  • Private Equity

  • Securities & Corporate Governance

  • Carve-outs & Transitions

  • Energy Transition

  • Oil, Gas & Sustainable Fuels

  • Corporate Real Estate & Funds

  • Healthcare & Life Sciences

  • Renewables & Storage

  • Power

Experience

Mergers and Acquisitions *

  • Advised Eldorado Drilling AS, a Norwegian independent drilling contractor, on its US$257.6 million all-cash acquisition of Vantage Drilling International Ltd., a Bermuda offshore drilling contractor publicly traded on the Euronext Growth Oslo and U.S. OTC markets.
  • Representation of Seadrill Limited, a global offshore drilling contractor, on its US$338 million sale of three jack-up drilling rigs and joint venture interest in Qatar to Gulf Drilling International, a Qatar-based company providing onshore and offshore drilling, liftboat, and jack-up services.
  • Represented Seadrill Limited, a global offshore drilling contractor, on commercial management arrangements with SeaMex, a Bermuda-headquartered offshore energy services company that provides contract drilling services in the Gulf of Mexico, and Paratus relating to five jack-up drilling rigs operating in Mexico.
  • Advised RNA-Energy, a London-based developer and operator of utility-scale solar and battery energy storage projects, and its founders on its sale of battery and solar development projects in the United Kingdom to Brockwell Energy, a leading UK-based independent power producer and developer of renewable energy infrastructure.
  • Advised Seadrill Limited, a global offshore drilling contractor, on its US$628 million sale of seven jack-up drilling rigs in Saudi Arabia to the ADES group, a world-leading international provider of oil and gas drilling services, recognized as the world's largest operator of offshore jack-up rigs.
  • Represented Noble Corporation, a leading offshore drilling contractor for the global oil and gas industry, on its US$375 million sale of five jack-up drilling rigs operating in Europe and the Middle East to Shelf Drilling and its business combination with Maersk Drilling, each a global offshore drilling contractor.
  • Representation of Noble Corporation, a leading offshore drilling contractor for the global oil and gas industry, on its US$292 million sale of four jack-up drilling rigs in Saudi Arabia to the ADES group, a world-leading international provider of oil and gas drilling services, recognized as the world's largest operator of offshore jack-up rigs.
  • Represented GE Healthcare, a leading global medical technology, pharmaceutical diagnostics, and digital solutions innovator, on numerous acquisitions and disposals, including its minority investments and related options in Pilotlight and Zenith Technologies and its disposal of Zenith Technologies to Cognizant.
  • Represented Avnet, a global Fortune 500 technology solutions and electronic components distributor, on its £868 million recommended public takeover of Premier Farnell, a global distributor of technology products and solutions, specializing in electronic components, embedded systems, and industrial automation.
  • Advised IHS Markit (part of S&P Global), a global information, analytics, and solutions provider for major industries, financial markets, and governments, on numerous acquisitions and disposals.
  • Advised Fusion IP plc, a UK-based intellectual property (IP) commercialization company, on the recommended takeover by IP Group plc, a London-based, early-stage science and technology investor that specializes in commercializing intellectual property from universities and research institutions.
  • Connected Fibre and its founders on the investment by Foresight Group, a leading global investment manager specializing in real assets and capital for growth, in fibre optic network infrastructure.
  • Represented SHUAA Capital, a leading Dubai-based asset management and investment banking platform, an UAE asset management and investment company, on various acquisitions, joint ventures and debt restructurings.
  • Represented Ithmar Capital Partners, a Dubai, United Arab Emirates-based private equity and investment firm, in connection with the reorganization of debt facilities extended by Ajman Bank to Thumbay Group, a diversified international business conglomerate.
  • Represented a leading US healthcare REIT on numerous acquisitions and disposals.
  • Represented a leading private equity sponsor on its recommended takeover of a company listed on the Johannesburg Stock Exchange and the Stock Exchange of Mauritius.
  • Advised LSG Sky Chefs, a premier global provider of airline catering, in-flight retail, and hospitality services, on the disposal of its 50% stake in joint-venture Alpha LSG, the biggest inflight catering, on-board retail and logistics company in the UK, to Dnata, one of the world's largest air and travel services providers.
  • Advised Marriott International, a leading American multinational hospitality company, on its £100 million recommended public takeover of Elegant Hotel Group, the owner and operator of a collection of upscale, beachfront resorts in the Caribbean.
  • Represented The Stars Group, a leading Canadian technology and online gaming company, on its US$4.7 billion acquisition of Sky Betting and Gaming from CVC, Sky, and management and related arrangements.
  • Represented a leading private equity sponsor on numerous acquisitions and disposals of portfolios of hotels and related franchising arrangements.
  • Representation of Kindred Group, a premier online gambling operator, on its £200 million recommended public takeover of 32Red plc, an online casino, poker and bingo operator.
  • Advised United Parcel Service, a package delivery company, on its acquisition of Marken, a global provider of supply chain solutions to the life sciences industry.
  • Represented Diploma PLC, an international, value-added distribution group that supplies specialized technical products and services, on numerous acquisitions.
  • Eshraq Investments, a diversified investment company, on its acquisition of Goldilocks Investment Company, an open-ended fund based in the United Arab Emirates, to create a diversified entity with combined assets of more than US$1 billion.
  • Advised BP p.l.c., a global integrated energy company headquartered in London, and its affiliates on its acquisition of BP Midstream Partners LP in an all-stock transaction.
  • Represented Qannas Investment Limited, an investment company managed by Shuaa Capital, a leading publicly traded asset management and investment banking firm, on its sale of assets to the Tabarak group, an established, multi-sector enterprise with operations spanning real estate, construction, automotive, and food and beverage sectors.
  • Representation of Gabon Oil Company, the state-owned national oil and gas enterprise of the Gabonese Republic, on its US$350 million acquisition of interests in seven oil fields in Gabon from Tullow Oil, a multinational oil and gas exploration and production company.
  • Representation of Powell Industries, a leading supplier of custom-engineered solutions for the management, control and distribution of electrical energy, on its US$16 million acquisition of Remsdaq, a manufacturer of remote terminal units for electrical substation control and automation in generation, transmission and distribution, from founder sellers.

Equity Capital Markets *

  • Representation of Amryt Pharma plc, a life sciences company, on its reverse takeover of Aegerion Pharmaceuticals, a biopharmaceutical company, out of chapter 11 bankruptcy proceedings and related scheme of arrangement and relisting of the enlarged group on AIM.
  • Advised Investec Bank, an international specialist bank and wealth manager, in connection with its role as sponsor to Lamprell plc, a multinational provider of engineering, procurement, construction, and installation (EPCI) services for the energy sector, on its class 1 transaction, comprising its joint venture with Saudi Aramco, the National Shipping Company of Saudi Arabia and Hyundai Heavy Industries Co. Ltd., a shipbuilding company and a major heavy equipment manufacturer, in relation to the establishment, development and operation of a maritime yard in Saudi Arabia.
  • Representation of Lamprell plc, a multinational provider of engineering, procurement, construction, and installation services for the energy sector, on its US$120 million 5 for 16 rights issue and its US$336 million takeover offer for Maritime Industrial Services Co. Inc. Ltd., an engineering and contracting group serving the energy, oil, gas, and petrochemical sectors, and its US$225 million 3 for 10 rights issue.
  • Represented Forterra plc, a building products manufacturer, on its £400 million initial public offering.
  • Represented a leading private equity sponsor on its proposed disposal of a US building and construction products manufacturer, and related reverse takeover and admission to the premium listing segment of the Official List and to trading on the London Stock Exchange.
  • Advised Kennedy Wilson Europe Real Estate plc, a prominent property investment fund focused on acquiring and managing commercial, office, multifamily and retail real estate assets across Europe, on its £910 million initial public offering, its £350 million firm placing an open offer and its €472 million related party transaction of two Irish property portfolios.
  • Representation of Barclays Bank, Deutsche Bank and RBC Capital Markets, among others, on the £780 million initial public offering of Infinis Energy plc, a leading UK-based renewable energy generator.
  • Represented Merlin Entertainments plc, a leading global location-based family entertainment company, on its £3.2 billion initial public offering.

*Includes matters handled prior to BCLP

Resources

Publications

  • Are Poison Pills Finally Coming to the UK?, Financier Worldwide, January 2021

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