Mergers and Acquisitions TRANSACTIONAL

WilmerHale lawyers have decades of experience advising public and private companies in all aspects of mergers and acquisitions in both the United States and Europe.

Market leaders in life sciences, technology, financial services, communications and many other industries turn to WilmerHale for legal advice and business advantage. In 2016, we advised clients on more than 75 M&A transactions with an aggregate value of approximately $50 billion, providing guidance in areas including corporate, securities, antitrust and tax. Since 2006, we have participated in more than 1,000 mergers and acquisitions with a total value in excess of $400 billion, ranging from sales of VC-backed companies to multibillion-dollar global mergers. Our experience ranges from public-public M&A transactions and the related disclosure and fiduciary duty issues to the unique issues presented by acquisitions of financial sponsor-backed private companies. We also advise clients on hostile transactions and activist investors, and represent investment banks serving as financial advisors in M&A transactions. 


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Bothwick, Jay E.

Jay E. Bothwick

Co-Chair, Mergers and Acquisitions Practice Group

+1 617 526 6526 (t)

Leibowitz, Hal J.

Hal J. Leibowitz

Co-Chair, Mergers and Acquisitions Practice Group

+1 617 526 6461 (t)

Bain, Mick

Mick Bain


+1 617 526 6158 (t)

Bonnes, Andrew

Andrew Bonnes


+1 617 526 6136 (t)

Boot, Jeannette K.

Jeannette K. Boot


+1 212 295 6507 (t)

Borden, Mark G.

Mark G. Borden


+1 617 526 6675 (t)

Bothwick, Jay E.

Jay E. Bothwick


+1 617 526 6526 (t)

Braun, Martin

Dr. Martin Braun


+49 69 27 10 78 207 (t)

Brown, Lillian

Lillian Brown


+1 202 663 6743 (t)

Buckland, Peter

Peter Buckland


+1 650 858 6036 (t)


Representative experience includes:

  • Akamai Technologies' acquisitions of Codemate for $107.5 million, Prolexic Technologies for $403 million and Soha Systems for $60 million;
  • Analog Devices' acquisition of Linear Technology for $14.8 billion and Hittite Microwave for $2.5 billion;
  • AS&E's acquisition by OSI Systems for $269 million;
  • ASICS Corporation's acquisition of FitnessKeeper (undisclosed);
  • Barclays' sale of US wealth and investment management business to Stifel Financial Corporation (undisclosed);
  • Booz Allen Hamilton's acquisition of the software services business of SPARC (undisclosed);
  • Cumberland Farms' sale of Gulf Oil business to ArcLight Capital Partners (undisclosed);
  • Cynosure's acquisition by Hologic for $1.6 billion;
  • Danaher Corporation's acquisition of Phenomenex (undisclosed);
  • Demandware's acquisition by for $2.8 billion;
  • Durata Therapeutics' acquisition by Actavis for $760 million;
  • Endurance International Group's acquisition of Ace Data Centers for $73.3 million;
  • First Marblehead Corporation's acquisition by FP Resources USA for $65.5 million;
  • Gilt Groupe Holdings' acquisition by Hudson's Bay Company for $250 million;
  • Hilton Worldwide Holdings' sale of a 25% equity interest by Blackstone to HNA Tourism Group for $6.5 billion;
  • Kronos' acquisition of Empower Software (undisclosed);
  • MetaMind's acquisition by for $32.4 million;
  • Micro Focus' acquisition of Serena Software for $540 million;
  • Millennium Pharmaceuticals' $125 investment in Maverick Therapeutics and related collaboration and option to acquire for an undisclosed amount;
  • MKS Instruments' acquisition of Newport Corporation for $980 million;
  • Munchkin's acquisition of Milkmakers (undisclosed);
  • Orbitera's acquisition by Google (undisclosed);
  • Oxitec's acquisition by Intrexon Corporation for $160 million;
  • PAREXEL International Corporation's acquisition of ExecuPharm for $135 million;
  • PerkinElmer's sale of medical imaging business to Varian Medical Systems for $276 million;
  • Progress Software's acquisition of Telerik for $262.5 million;
  • Red Hat's acquisition of 3scale for $29.1 million;
  • REDI Holdings' acquisition by Thomson Reuters (undisclosed);
  • Staples in its acquisition by Sycamore Partners for $6.9 billion;
  • Thermo Fisher Scientific's acquisition of Alfa Aesar research chemicals business of Johnson Matthey for approximately $405 million and the sale of its cell culture, gene modulation and magnetic beads businesses to GE Healthcare for $1.06 billion;
  • The Medicines Company's sale of global portfolio of hemostasis products to Mallinckrodt for $410 million; and
  • WEX's acquisition of Electronic Funds Source for $1.4 billion.

Additional M&A experience: 20172016, 20152014, 20132012, 2011, 2010, 2009

Publications & News


October 6, 2017

WilmerHale Represents Navient in $155M Acquisition of Earnest

Navient, a leading provider of asset management and business processing solutions, announced it has entered into an agreement to acquire Earnest, a leading financial technology and education finance company.

October 2, 2017

Wait, I Thought We Were Done? DOJ Challenges $4B Merger Months After HSR Filing and Expiration of the HSR Waiting Period

Earlier this week, the Antitrust Division of the Department of Justice filed a lawsuit seeking to unwind Parker-Hannifin's $4.3 billion consummated acquisition of Clarcor.

September 28, 2017

WilmerHale Represents CIRCOR in $855M Acquisition of Colfax’s Fluid Handling Business from Colfax Corp.

CIRCOR International, Inc.—a leading provider of flow control solutions and other highly engineered products for markets including oil & gas, aerospace, power, process and general industrial—announced that it has signed a definitive agreement to acquire Colfax Fluid Handling (CFH) from Colfax Corporation for approximately $855 million including cash, newly issued CIRCOR shares, and the assumption of pension plan liabilities linked to the CFH business.

September 25, 2017

WilmerHale Adds Partner Keith Trammell, Establishing Corporate Practice in its Denver Office

Mr. Trammell counsels public companies, private equity funds and privately held companies on capital markets and merger and acquisition transactions.

September 22, 2017

WilmerHale Named Finalist for Deal of the Year by The M&A Advisor

The M&A Advisor has named WilmerHale as a finalist for the Deal of the Year award in the following categories: Information Technology (from $10M-$50M), Corporate/Strategic (from $25M-$50M), and M&A (from $25M-$50M) for its representation of Analog Devices in the sale of Cyber Security Solutions business of Sypris Electronics LLC to Analog Devices, Inc.

August 22, 2017

China's State Council Announces Promotion of Foreign Investment Growth

On August 8, China's State Council published the Notice on Promotion of Foreign Investment Growth (Guo Fa [2017] No. 39).

August 14, 2017

WilmerHale Counsels Investors Abingworth Bioventures and Atlas Venture in IFM Therapeutics Acquisition by Bristol-Myers Squibb

Bristol-Myers Squibb Company and IFM Therapeutics announced that the companies have signed a definitive agreement under which Bristol-Myers Squibb will acquire all of the outstanding capital stock of IFM Therapeutics, a venture-backed biotech company focused on developing therapies that modulate novel targets in the innate immune system to treat cancer, autoimmunity and inflammatory disorders.

August 4, 2017

WilmerHale Represents Fortive in Acquisition of Industrial Scientific Corporation

On July 27, 2017, Fortive Corporation (NYSE: FTV) announced that it signed a definitive agreement to acquire Industrial Scientific Corporation, a leading provider of portable gas detection equipment and a safety-as-a-service pioneer.

August 3, 2017

WilmerHale Represents Navient in Acquisition of Duncan Solutions

Navient, a leading asset management and business processing services company, announced the acquisition of Duncan Solutions, a transportation revenue management company serving municipalities and toll authorities.

July 24, 2017

German Government Amends German Foreign Trade and Payments Ordinance to Widen Control of Foreign Takeovers of Critical German Companies

On July 12 the German federal government adopted important amendments to the German Foreign Trade and Payments Ordinance.