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Jeffrey R. O'Brien


Advises companies, financial intermediaries and private equity sponsors on complex M&A, finance and capital markets transactions.

Jeff advises companies, financial intermediaries and private equity sponsors on their most complex mergers and acquisitions, leveraged finance and capital markets transactions, including IPOs and high-yield and investment-grade bond offerings. With a global and diverse client base, Jeff is adept at navigating the complexities associated with executing cross-border transactions across multiple jurisdictions and provides clients with practical and creative solutions.

Based in our London office since 2005, Jeff previously worked in the New York and Madrid offices.

Experience highlights

Mergers & Acquisitions
  • Delonex Energy on:
    • a $600 million investment from an investment group led by affiliates of Warburg Pincus
    • its entry into and exit from a consortium to acquire a 50% interest in Petrobras Oil and Gas for $1.41 billion
  • DONG Energy on an equity capital injection from Goldman Sachs
  • EQT on its DKK12.8 billion sale of Dako to Agilent Technologies
  • Morgan Stanley on:
    • its participation in a consortium acquiring HSBC Rail
    • the $2.5 billion sale of its aircraft leasing business to Terra Firma
  • Novo Nordisk on numerous licensing transactions and asset acquisitions in the U.S.
  • Reliance Industries and Jio Platforms on a series of capital raisings from 13 leading strategic and financial investors, including Facebook and Google, amounting to over $20 billion in investments into Jio Platforms
  • Reliance Industries on its agreement to establish a joint venture with an affiliate of BP plc relating to their petroleum retail business in India
  • Reliance Industries on its acquisition of wireless infrastructure assets from Reliance Communications
  • Tele2 on its $2.4 billion sale of its Russian operations to VTB Group
  • Telia on its:
    • $1.03 billion sale of its 60.4% interest in Nepalese telecom operator Ncell to Axiata
    • $215 million sale of Ucell to the Republic of Uzbekistan
    • sale of its 60% interest in Tajik mobile operator Tcell to AKFED
High-Yield, TLB and Other Capital Markets Transactions
  • Cairn India on an equity private placement
  • Codere on five high-yield notes offerings, its senior credit facilities and its IPO
  • ISS on several concurrent tender offers for, and partial redemptions of, high-yield notes
  • Netcompany on its DKK 7.75 billion IPO and Nasdaq Copenhagen listing
  • Ocado on a consent solicitation in respect of high-yield notes
  • ODIGEO on three high-yield notes offerings, its IPO, a consent solicitation in respect of two series of high-yield notes and a cash tender offer for one series of high-yield notes
  • Reliance Industries on several bond offerings and a consent solicitation in respect of three series of Yankee bonds
  • Technicolor on its comprehensive balance sheet restructuring, term loan and working capital facilities, repricings and other liability management transactions
  • UBM on a Yankee bond offering and a rights issue to fund its acquisition of Advanstar
  • Underwriters on high-yield notes offerings for Worldpay, Abengoa, Abengoa Yield and Inovyn
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Financial News – “20 Most Influential in Legal Services,” 2021

IFLR1000 – Capital Markets: High Yield, M&A, United Kingdom, Highly Regarded

J.D., Georgetown University Law Center
  • Order of the Coif
  • magna cum laude
  • Member, Georgetown Law Journal
B.A., University of Virginia
  • with highest distinction
Professional history
  • Partner, 2008-present
  • Associate, 2000-2008
Qualifications and admissions
  • State of New York
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