David Leinwand’s practice focuses on merger and acquisition transactions.

He has represented a broad array of buyers and sellers, as well as their financial advisors, in a wide variety of public and private deals. In particular, David has significant experience advising private equity firms in their acquisitions and dispositions. He also provides advice regarding governance matters and the fiduciary duties of officers and directors to corporations and their boards.

Over the past few years, David has worked on a number of high-profile deals involving companies in a range of industries, including consumer products and retail, energy, financial services, information technology, and pharmaceuticals and biotechnology.

David joined the firm in 1992 and became a partner in 2000.

Notable Experience

  • ABB in its $1 billion acquisition of Power-One and in its $1 billion acquisition of Ventyx.

  • Barclays Capital in the purchase of Lehman Brothers’ U.S. and Canadian investment banking and capital markets businesses and its Manhattan headquarters.

  • Bausch + Lomb and Warburg Pincus in the $8.7 billion sale of Bausch + Lomb to Valeant Pharmaceuticals. David previously represented Warburg Pincus in its acquisition of Bausch + Lomb.

  • Biomet in its acquisition of the global trauma business of DePuy Orthopaedics.

  • DSM in its $1.087 billion acquisition of Martek Biosciences.

  • Endurance International Group in its acquisitions of HostGator and the websites business of Intuit.

  • Financial advisors in M&A transactions, including Citigroup Global Markets and the Raine Group.

  • GT Nexus in its $675 million acquisition by Infor.

  • Neiman Marcus, TPG Capital and Warburg Pincus in the $6 billion sale of Neiman Marcus to Ares Management and the Canada Pension Plan Investment Board, which The American Lawyer named its 2014 “Global M&A Deal of the Year: Canada.” David previously represented TPG and Warburg Pincus in their acquisition of Neiman Marcus.

  • Nortel Networks in the sale of its global enterprise solutions business to Avaya.

  • Open Text Corporation in its $1.165 billion acquisition of GXS Group and its acquisition of Actuate Corporation.

  • The shareholders of J. & W. Seligman in the sale of the company to Ameriprise.

  • Warburg Pincus in its acquisitions of:

    • Sterigenics, Inc.,
    • Electronic Funds Source,
    • Endurance International Group,
    • Wencor Group,
    • Rural/Metro Corporation, and
    • Crossmark, Inc.

See More


  • 2012: "Judge and Banker—Valuation Analyses in the Delaware Courts," 116 Penn State Law Review 957 (with William A. Groll)
  • April 2012: "The El Paso/Kinder Morgan Opinion: Further Delaware Guidance on Investment Banker Sell-Side Conflicts,” The M&A Lawyer (with Victor I. Lewkow and Ethan A. Klingsberg)
  • February/March 2008: “Stresses on the New LBO Deal Architecture,” Pratt’s Journal of Bankruptcy Law