Accessibility Statement

Publications | October 10, 2017

US Court Invalidates 'Serial Inversion' Tax Regulation That Ended Pfizer-Allergen Merger

MNE Tax

Author

Amanda Pedvin Varma

Overview

Steptoe's Amanda Varma and Brigid Kelly authored an article titled "US Court Invalidates 'Serial Inversion' Tax Regulation That Ended Pfizer-Allergen Merger" for MNE Tax. The article, published October 10, discusses the US District Court for the Western District of Texas's ruling that the IRS's temporary 'serial inversion' regulations are invalid.

Professionals

Amanda Pedvin Varma
Amanda Varma advises multinational businesses on US federal income tax matters, with particular focus on international tax planning, controversies, and tax policy issues. She counsels both US- and...

Partner

Tax, International Tax, Transactional Tax, Tax Policy

Practices

International Tax

Tax

Tax Controversies & Litigation

Transactional Tax

Press Releases Ying Li Honored as Patent Strategy Attorney of the Year, New York in LMG Life Sciences Americas Awards 2026 September 11, 2026 Press Releases Alan Klinger Honored in City and State NY's 2026 Labor Power 100 List September 9, 2026 Seminars & Events The Evolution of Commercial Disputes September 22, 2026
Press Releases Steptoe Expands Financial Crime and Enforcement Capabilities with Arrival of Former DOJ Attorney Della Sentilles September 9, 2026 Press Releases Steptoe Helps Secure Defense Verdict for Mead Johnson in First Bellwether Trial Over Infant Formula and NEC September 1, 2026 Press Releases Steptoe Files Amicus Brief in Tax Court on Behalf of the US Chamber of Commerce September 1, 2026 Press Releases Nicholas Silverman Recognized as a 2026 Law360 Rising Star in White Collar August 26, 2026 Press Releases Steptoe Secures Complete Victory for DISH Network Corporation and Charlie Ergen on DC Circuit Appeal August 25, 2026 Press Releases Steptoe Ranks First in Its Category in Law360’s Pulse Pro Bono Leaders 2026 August 21, 2026 Press Releases Robert Kappers Recognized as a 2026 Law360 Rising Star in Intellectual Property August 20, 2026 Press Releases Steptoe Helps Secure Federal Court Injunction Blocking HUD Suspension of LAHSA and Protecting Critical Homelessness Funding for Los Angeles August 20, 2026 Press Releases Steptoe Strengthens Investigations Bench with White-Collar and Regulatory Defense Partner Jennifer Loeb August 18, 2026

View More