Adam S. Halpern

Chair, Tax

Mountain View 650.335.7111


Recognized as a leading tax practitioner, Adam focuses on the U.S. federal income taxation of international transactions. In recent years, Adam’s practice has focused significantly on the 2017 TCJA, including FDII, GILTI, BEAT and the new foreign credit system. Adam also handles traditional international tax issues such as transfer pricing, international mergers, acquisitions and restructurings, Subpart F, source of income and expense allocations.

Over the last 20 years at Fenwick, Adam has successfully represented clients—from top innovators to Fortune 500 companies—across multiple industries, including gaming, manufacturing, media, medical devices, pharmaceuticals and software.

Adam advises clients on the taxation of cross-border operations, acquisitions, dispositions and restructurings. He has successfully represented U.S. and non-U.S. multinationals in global tax planning and in federal tax controversies at all levels. As chair of Fenwick’s tax group, Adam leads a team of lawyers recognized across the United States and internationally. The group has represented more than 100 Fortune 500 companies on tax matters, and has served as counsel in innumerable IRS Appeals proceedings and federal court tax cases.

Adam is a frequent speaker at Tax Executives Institute (TEI) and Practising Law Institute (PLI) conferences, and is a lecturer in law at Stanford Law School.

Among his published articles are:

He has been named a leading tax lawyer by Euromoney, International Tax Review, Chambers USA and The Legal 500.