William Arrenberg#149

William Arrenberg

William Arrenberg is a Partner in the Tax department at Herbert Smith Freehills LLP and offers broad expertise in corporate tax and structuring. This includes domestic and cross-border tax planning and structuring, reorganisations, and asset and share acquisitions and disposals.

William regularly advises clients in the energy sector, and provides tax advice on high-value structured real estate and infrastructure transactions. He works with major international corporations including:

  • Apache Corporation,
  • Chevron,
  • Mitsubishi Corporation,
  • Time Warner and
  • Warner Bros.

After training at Herbert Smith, William qualified to join the Tax department in 2002. The numerous high-profile matters he has advised on include multibillion-pound acquisitions, disposals and takeovers.


  • Apache Corporation on its US$1.7 billion acquisition of North Sea assets from ExxonMobil
  • Bharti Airtel on its US$10.7 billion acquisition of Zain's 15 African mobile networks
  • Chevron on the US$1.8 billion disposal of UK and European downstream businesses to Valero
  • Ernst & Young as administrators of Nortel entities on the administration of significant parts of the Nortel group, and sale of various businesses and assets in multiple jurisdictions
  • Warner Bros on its £99.9m takeover bid for Shed Media

Practice Area

Qualified Year

  • 2002

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