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 2013, we advised clients throughout the United States and Europe on more than 75 M&A transactions, providing guidance in areas including corporate, securities, antitrust and tax. Since 2004, we have participated in more than 1,000 mergers and acquisitions with a total value in excess of $350 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)

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)


Our recent M&A transactions include:

  • Akamai Technologies' acquisition of Cotendo for $268 million
  • American Dental Partners' acquisition by JLL Partners for $398 million (counsel to special committee)
  • BioVex's acquisition by Amgen for $1 billion (including milestone payments)
  • Enobia Pharma's acquisition by Alexion Pharmaceuticals for $1.1 billion (including milestone payments)
  • HMS Holdings' acquisition of HealthDataInsights for $400 million
  • ISTA Pharmaceuticals' acquisition by Bausch + Lomb for $500 million
  • Kiva Systems' acquisition by Amazon for $775 million
  • Palomar Medical Technologies' acquisition by Cynosure for $294 million
  • PerkinElmer's acquisition of Caliper Life Sciences for $600 million
  • SS&C Technologies' acquisition of GlobeOp Financial Services for $900 million
  • Stromedix's acquisition by Biogen Idec for $562.5 million (including milestone payments)
  • The Medicines Company's acquisition of Incline Therapeutics for $390 million (including milestone payments)
  • The Medicines Company's acquisition of Rempex Pharmaceuticals for $474 million (including milestone payments)
  • Thermo Fisher Scientific's acquisition of One Lambda for $925 million
  • Thermo Fisher Scientific's acquisition of Phadia for €2.47 billion
  • Thermo Fisher Scientific's sale of its Cell Culture, Gene Modulation and Magnetic Beads Businesses to GE Healthcare for $1.06 billion
  • TransUnion's acquisition of TLO for $154 million (bankruptcy auction)
  • Wright Express' acquisition of Fleet One Holdings for $369 million

Additional M&A experience: 2014, 20132012, 2011, 2010, 2009

Publications & News


November 10, 2014

DOJ Obtains Fines and Disgorgement for Premerger Coordination in Flakeboard/SierraPine Transaction

In a stark reminder that the US antitrust agencies continue to take illegal premerger coordination—commonly known as “gun jumping”—very seriously, two producers of medium density fiberboard (MDF) agreed to pay nearly $5 million in civil penalties and disgorgement for violations of the Hart-Scott-Rodino (HSR) Act and Section 1 of the Sherman Act.

November 4, 2014

U.S. News – Best Lawyers® Release 2015 “Best Law Firms” List, Names WilmerHale International Arbitration “Law Firm of the Year”

The 2015 U.S. News - Best Lawyers® "Best Law Firms" list includes WilmerHale being named a first-tier law firm in 24 national and 62 metro-area rankings. In addition, the firm boasts more than 20 second- and third-tier rankings in several national and metro-area rankings.

October 22, 2014

Progress Software Announces Intent to Acquire Telerik

WilmerHale client Progress Software Corporation announced that it has entered into a definitive agreement to acquire privately held Telerik AD, a leading provider of application development tools.

October 8, 2014

Actavis to Acquire Durata Therapeutics, Inc.

On October 6, 2014, WilmerHale client Durata Therapeutics announced that it had entered into a definitive merger agreement with Actavis plc under which a subsidiary of Actavis will commence a tender offer to acquire all of the outstanding shares of Durata common stock.

October 3, 2014

The Legal 500 UK Honors WilmerHale with Top Rankings in 2014 Edition

The Legal 500, the United Kingdom's guide to outstanding lawyers, has again selected WilmerHale as a top-tier law firm in dispute resolution - international arbitration, and highly recommends the firm in nine other categories. The guide also names three lawyers to its "leading individuals" list, and recognizes a total of eight of the firm’s London-based lawyers

September 23, 2014

Millennial Media to Acquire Nexage, a Leading Mobile SSP and Advertising Exchange

Millennial Media today announced that it has signed a definitive agreement to acquire Nexage for approximately $107.5 million in cash and stock, subject to certain adjustments.

September 15, 2014

Delaware Court of Chancery Once Again Upholds Forum Selection Bylaw Requiring Intra-Corporate Litigation to Be Brought in a Forum Chosen by the Board of Directors

Once announced, merger and acquisition transactions typically result in the filing of numerous lawsuits in multiple jurisdictions. The Delaware Chancery Court has once again approved forum selection bylaw as a way to reduce the expense and distraction of multi-forum litigation.

August 28, 2014

LMG Life Sciences Honors Firm, Attorneys with Top Rankings for Third Consecutive Year

The 2014 edition of LMG Life Sciences has been released, and it includes the recognition of nine WilmerHale practice areas and 17 attorneys.

July 2, 2014

Nicox to Acquire Aciex Therapeutics, Inc.

Nicox S.A. today announced it has signed an agreement to acquire all of the outstanding equity of Aciex Therapeutics, Inc., a private, US-based, ophthalmic development pharmaceutical company with a strong near-term pipeline of therapeutics addressing major segments of the ophthalmic market, including allergy and inflammation.

June 17, 2014

Yandex to Acquire

Yandex, the leading internet company in Russia, today announced that it has agreed to acquire, one of the leading online auto classifieds businesses in Russia.


October 23, 2014

2014 Proxy Season Roundtable

Boston, Massachusetts

September 11-13, 2014

ABA Business Law Section Annual Meeting 2014

Chicago, Illinois

June 13, 2014

GCR Live 2nd Annual Foreign Investment Review

New York, New York

May 20-21, 2014

MPM Capital’s 13th Annual Healthcare Leaders Summit

Bal Harbour, Florida

April 10-12, 2014

American Bar Association: Business Law Section 2014 Spring Meeting

Los Angeles, California

February 26, 2014

WMACCA Corporate Law Forum: The New Focus on Audit Committees

McLean, Virginia

January 30, 2014

Deal How to Sell a Division: Nuts & Bolts


December 3, 2013

Northeastern M&A/Private Equity Forum

Boston, Massachusetts

November 13, 2013

Boston Bar Association: CLE – First Annual Mergers & Acquisitions Conference

Boston, Massachusetts

November 13, 2013

WMACCA: The Lawyers' MBA

McLean, Virginia