A deep and diverse practice focused on maximizing tax efficiencies and minimizing tax risks for clients nationally and internationally.

With lawyers who are recognized globally as leading practitioners in the field, our team advises clients on the tax implications of domestic and international transactions, including mergers, acquisitions, financings, investments, joint ventures and restructurings. Widely known for our work with tax-exempt organizations, we advise such clients on an array of issues presented by their tax-exempt status. We also represent clients in seeking favorable guidance and rulings from the IRS and state tax authorities, and defend them in tax litigation and audits. In addition, we counsel clients in every industry on the design of executive compensation arrangements and on compensation and benefits issues in general.

Wethly, Kimberly B.

Kimberly B. Wethly

Chair, Tax Practice Group

+1 617 526 6481 (t)


Burke, Robert D.

Robert D. Burke


+1 617 526 6470 (t)


Kilgore, R. Scott

R. Scott Kilgore


+1 202 663 6116 (t)


Null, Amy A.

Amy A. Null


+1 617 526 6541 (t)


Schnall, Matt

Matthew Schnall


+1 617 526 6892 (t)


Wethly, Kimberly B.

Kimberly B. Wethly


+1 617 526 6481 (t)


Ritt, Roger M.

Roger M. Ritt

Senior Counsel

+1 617 526 6475 (t)


Bormann, Amelia E.

Amelia E. Bormann

Special Counsel

+1 617 526 6860 (t)



Our tax practice encompasses areas including mergers and acquisitions, international and domestic tax planning, compensation and benefits, private equity and hedge funds, federal and state tax controversies and litigation, and tax exempt organizations. Recently, we have:

  • structured US and cross-border mergers and acquisitions involving public and private companies;
  • advised fund sponsors on the off-shore and on-shore structure and operation of private equity and hedge funds for domestic, foreign and tax-exempt investors;
  • assisted with the cross-border restructuring of equity and compensation plans in connection with multi-national companies’ acquisitions of US subsidiaries;
  • defended clients before the IRS regarding tax benefits claimed with respect to offshore investments;
  • advised universities, museums, social welfare organizations and other entities on novel tax issues presented by their nonprofit status; and
  • provided guidance and assistance to public and private companies in drafting and implementing equity compensation plans and other nonqualified incentive compensation arrangements.

Publications & News


September 22, 2016

WilmerHale Reps Eleven Biotherapeutics in Acquisition of Viventia Bio

The acquisition creates a NASDAQ-listed company focused on the development of novel therapies based upon antibody fragments genetically fused to cytotoxic proteins, or targeted protein therapeutics, as new treatments in areas of oncology with significant unmet need.

August 10, 2016

WilmerHale Advises Orbitera in Acquisition by Google

The Google Cloud Platform team shares Orbitera's vision for seamless purchase and deployment of IT services across heterogeneous cloud infrastructure.

July 20, 2016

WilmerHale Advises PerkinElmer in €500M Eurobond Offering

PerkinElmer, Inc., a global leader focused on improving the health and safety of people and the environment, announced that it has completed a public offering of €500 million aggregate principal amount of 1.875% Senior Notes due 2026 at an issue price of 99.118% of the principal amount.

July 18, 2016

WilmerHale Advises Intercept Pharmaceuticals in $460M Public Offering

Intercept Pharmaceuticals, Inc., a biopharmaceutical company focused on the development and commercialization of novel therapeutics to treat non-viral, progressive liver diseases, has announced the closing of an underwritten public offering of $460 million aggregate principal amount of 3.25% convertible senior notes due 2023.

June 22, 2016

The Legal 500 United States 2016 Recognizes 111 WilmerHale Lawyers Across 30 Practice Areas

The guide's rankings are based on a series of criteria, including client feedback, interviews with private practice lawyers, and its own research.

June 22, 2016

WilmerHale Reps AS&E in $269M Acquisition by OSI Systems

American Science and Engineering, Inc., a leading worldwide supplier of innovative X-ray inspection solutions, announced that it has entered into a definitive agreement to be acquired by OSI Systems, Inc. for a total transaction value of approximately $269 million.

May 27, 2016

WilmerHale Lawyers and Practices Recognized in 2016 Edition of Chambers USA

Chambers USA: America's Leading Lawyers for Business announced its final rankings for the 2016 edition, with WilmerHale ranking among the nation's best in 47 practice area categories. Chambers also ranked 82 WilmerHale lawyers as leaders in their respective fields.

May 3, 2016

WilmerHale Represents MKS Instruments in Acquiring Newport Corporation and Securing $980 Million Acquisition Financing

WilmerHale represented its long-time client MKS Instruments, Inc., a global technology provider, in closing its acquisition of Newport Corporation, a worldwide leader in photonics solutions, for approximately $905 million.

March 4, 2016

German Cum/Ex-Trades: Enhanced Risks and Industry-Wide Challenges

The German and international financial industries and their advisors have come under new pressure to investigate so-called 'cum/ex' trades conducted between 2000 and 2012.

December 17, 2015

Barclays Completes Sale of its US Wealth & Investment Management Business to Stifel Financial

On December 4, 2015, Barclays PLC completed the sale of its US Wealth & Investment Management Business to Stifel Financial Corp. WilmerHale represented Barclays through this transaction, which was announced on June 8, 2015.


  • Best Lawyers in America - Recognized nearly 100 partners, naming seven "Lawyer of the Year" in the 2016 edition of their peer-review publication, which includes the recognition of eight lawyers in our tax practice.
  • Chambers USA: America's Leading Lawyers for Business - Recognized our Massachusetts Tax Practice in 2010-2016, praising our practice as having "an excellent tax team" with "a lot of depth and high quality across the board" and who offers "strategic, practical advice on solving the matter expeditiously." WilmerHale has been similarly ranked in previous editions of Chambers USA and has individually recognized William Caporizzo, Robert Burke, Roger Ritt, Julie Hogan Rodgers and Matt Schnall as leaders in their field.
  • U.S. News - Best Lawyers® - In the 2010-2016 "Best Law Firms" rankings, our tax law practice was ranked in the first-tier nationally and in Boston, and in the second-tier in New York
  • Who's Who Legal - Recognized our tax lawyers as among "the world's leading tax practitioners”
  • Articles published by members of our tax practice address a wide variety of topics, including Internet taxation, executive compensation, employee benefits, international taxation, and state and local taxation.
  • Our tax partners frequently present at conferences sponsored by leading professional organizations in the field. These include the American Bar Association, Boston Bar Association, CompStudy.com, BIO General Counsels Committee, MassMEDIC, NASDAQ, the National Association of Stock Plan Professionals and the Venture Capital CFO Symposium.