Image: Jessamy Gallagher

Jessamy Gallagher

Partner, Corporate Department


Phone: 44-020-3023-5274
Fax: 44-020-3023-5374


Jessamy Gallagher is the Global Co-Chair of the Paul Hastings Corporate Department and is a partner in the Energy and Infrastructure practice, based in the London office.

Ms. Gallagher focuses her practice on international public and private M&A in the infrastructure, energy, and real assets markets. She also has extensive experience counseling on business-critical corporate governance matters.

Ms. Gallagher regularly advises a wide range of global pension, infrastructure, and fund manager clients, as well as a number of FTSE listed clients.

Ms. Gallagher is a member of the Australian-United Kingdom Chamber of Commerce.


  • Named among the Hot 100 for 2023 by The Lawyer
  • Chambers UK, Ranked Band 1 in Infrastructure UK-wide
  • Legal 500 UK, Ranked in the Hall of Fame: Corporate M&A
  • Ranked as the fourth most active M&A lawyer in EMEA in October 2019 by MergerLinks


  • University of Sydney, LL.B., First Class Honours, University Medal
  • University of Sydney, B.A., First Class Honours


  • CPPIB on its acquisition of a strategic stake in and numerous subsequent investment rounds into Octopus Energy and establishing a funds platform for investment in developing renewable sources of energy globally
  • Arqiva (owned by a consortium of investors, including Macquarie Infrastructure and Real Assets, CPPIB, IFM Investors, and Whitehelm Capital) on its disposal of its TV broadcast and smart metering business, first as a 100% disposal and then subsequently an exit by CPPIB only to Digital9
  • Arqiva (owned by a consortium of investors, including Macquarie Infrastructure and Real Assets, CPPIB, IFM Investors, and Whitehelm Capital) in the sale of its telecoms division (towers business) to Cellnex Telecom S.A. for £2 billion
  • National Grid in its divestment of its £14 billion UK gas distribution business, Cadent, to a Macquarie-led consortium, the largest ever energy and infrastructure deal in the UK
  • IFM Investors in the disposal of its 40% stake in 50 Hertz Transmission, the German electricity transmission business
  • AIMCo in its acquisition of a majority stake in Eolia Renovables, a Spanish renewable energy company, from Oaktree Capital
  • QIC, ADIA, DIF, PGGM, and CapMan in their bid for Elenia Networks, the Finnish electricity distribution business
  • IFM Investors in its acquisition of a strategic stake in Manchester Airport Group (MAG) and the subsequent successful bid by MAG for London Stansted Airport
  • Sunsuper and NSW Treasury Corporation in their joint acquisition of a strategic stake in both Bristol and Birmingham International Airports from OTPP and subsequently another pension fund investor in its acquisition of a further strategic stake in the same airports, also from OTPP
  • USS in its acquisition of an aggregate 10.9% interest in Thames Water (Kemble Water Holdings Limited)
  • Macquarie Infrastructure and Real Assets, IFM Investors, CPPIB, and AMP Capital in the disposal of Wales & West Gas Networks to CKI
  • Allianz, AIMCo, Hastings Funds Management, and EdF Invest in their successful consortium bid for Porterbrook Trains, a UK rolling stock leasing company
  • AustralianSuper in two separate transactions to acquire a combined 67% interest in the Kings Cross Central development project, alongside developer Argent
  • PSP in the dissolution of its infrastructure joint venture with GIC, Isolux, involving the disposal of toll road and energy assets in North America, Brazil, India, Mexico, and Spain
  • NSW Treasury Corporation and Sunsuper in their US$310 million disposal of an aggregate 35% interest in LBC Tank Terminals
  • A bidder for the Scotia Gas Networks auction in 2016
  • A consortium bid for two gas pipelines and a terminal in the North Sea owned by Total and subsequently North Sea Midstream Partners
  • SAS Trustee Corporation in its disposal of its stake in Thames Water to Fiera Infrastructure Inc. through its wholly owned subsidiary, Aquila GP Inc.
  • A bidder for certain stakes in Kelda Holdings Limited, the holding vehicle for Yorkshire Water
  • A leading investment bank and Deutsche Bank in the dual track process for the disposal of Thames Water by RWE (as part of which Thames Water was ultimately acquired by the Macquarie-led consortium)
  • Rio Tinto in its defence of the hostile takeover made by BHP Billiton and its US$15 billion rights issue, the first rights issues by a dual listed company
  • Sainsbury’s in its defence of an unsolicited takeover proposal by the Qatar Investment Authority
  • Anglian Water in a recommended cash offer by Osprey Acquisitions (IFM Investors, CPPIB, Colonial First State and AMP Capital)

Practice Areas

Energy and Infrastructure


Mergers and Acquisitions




England and Wales Solicitor


University of Sydney, LL.B. 1999

Sydney Law School - The University of Sydney, J.D. 1998

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