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Martin T. Hamilton

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Martin T. Hamilton is a partner in the Tax Department. He primarily handles U.S. corporate, partnership and international tax matters.

Martin's practice focuses on mergers and acquisitions, cross-border investments and structured financing arrangements, as well as tax-efficient corporate financing techniques and the tax treatment of complex financial products. He has experience with public and private cross-border mergers, acquisitions, offerings and financings, and has advised both U.S. and international clients, including private equity funds, commercial and investment banks, insurance companies and multinational industrials, on the U.S. tax impact of these global transactions.

In addition, Martin has worked on transactions in the financial services, technology, insurance, real estate, health care, energy, natural resources and industrial sectors, and these transactions have involved inbound and outbound investment throughout Europe and North America, as well as major markets in East and South Asia, South America and Australia.

Martin also regularly represents clients in tax controversies and other matters before the U.S. tax authorities.

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On June 17, 2025, the Tax Court opinion in AbbVie Inc. and Subsidiaries v. Commissioner of Internal Revenue was issued,[1] holding that the approximately $1.6 billion termination fee AbbVie (a Delaware corporation) paid to its abandoned merger partner Shire plc (an Irish company) was properly an ordinary deductible business…

The One Big Beautiful Bill Act (the “OBBBA“), passed by the U.S. House of Representatives (the “House“) on May 22, 2025, is a comprehensive legislative package that seeks to implement sweeping reforms in tax policy, immigration, healthcare, and infrastructure as part of the federal budget reconciliation…

On Thursday May 22, the House of Representatives passed the One Big Beautiful Bill Act (H.R. 1, hereafter the “Bill”). The Bill will now be considered by the U.S. Senate.

The following is a summary of some of the key provisions that have been changed from the version…

Update (7/11/2025): On July 4, 2025, President Trump signed the “One Big Beautiful Bill” Act (the “OBBBA”).  Consistent with the earlier draft bill released by the Senate, the OBBBA did not include either of the two proposed changes that would have been particularly relevant for the sports industry…

On May 18, 2025, the House Budget Committee approved the legislation entitled, “The One, Big, Beautiful Bill” (the “House Bill”). The bill is expected to be revised by the House Rules Committee before being sent to the House floor for a vote.

The House Bill extends…

I.          Introduction

On January 30, 2025, Mike Crapo (R-ID), the Chairman of the Senate Finance Committee, and Senator Ron Wyden (D-OR), the Ranking Member of the Senate Finance Committee released a discussion draft of the “Taxpayer Assistance and Service Act” (the “bill”), a bipartisan taxpayer rights bill intended…

Introduction

On December 2, 2024, the U.S. Department of the Treasury (“Treasury”) and the Internal Revenue Service (the “IRS”) published final regulations (the “Final Regulations”) on section 752[1] regarding the allocation of partnership recourse liabilities in situations in which multiple partners and related parties bear part or all of…

I. Introduction

On January 17, 2025, news sources reported that Republican members of Congress circulated a detailed list of legislative policy options, including tax proposals. This blog post summarizes some of the tax proposals and corresponding revenue estimates mentioned in the list.

II.        Individuals

(a)        SALT Reform Options

The…

On January 17, 2025, multiple news outlets and other sources reported the existence of a memorandum circulated by the U.S. House of Representatives Budget Committee to the House Republican Caucus (the “Memorandum”) containing an extensive list of budget proposals that may be considered in connection with the new Congress’s widely expected budget reconciliation legislation. The Memorandum, which is publicly available via link from a number of news outlets,[1] contains approximately fifty pages of proposals covering a wide range of policy areas and enumerating scores of potential specific legislative proposals (along with estimated budget effects in most cases), some of which are seemingly mutually exclusive. Included in the memo are a number of tax-related proposals, including tariff proposals, which are briefly set forth below.