Global Tax 50 2015: Robert Stack

International Tax Review is part of Legal Benchmarking Limited, 1-2 Paris Garden, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

Global Tax 50 2015: Robert Stack

Deputy assistant secretary for international tax affairs, US Treasury

Robert Stack

Robert Stack was also in the Global Tax 50 2014

Last year, the Global Tax 50 praised Robert Stack for bucking the trend of reticence among tax officials. The US BEPS representative did not shrink away from the spotlight, contributing widely to media discussion of relevant issues and speaking regularly at related events.

This year, Stack has been praised in particular for defending the rights and interests of the US in multilateral BEPS discussions as part of his role as the lead US delegate to the OECD's Committee on Fiscal Affairs.

With many of his compatriots viewing BEPS discussions as an attack on the US, Stack staunchly defended the arm's-length principle and pushed back against proposed changes to digital economy taxation, among other things.

Stack also criticised the UK's unilateral action to introduce a diverted profits tax (DPT) ahead of final BEPS deliverables. His denunciation of the UK's move – which he said hindered further progress at the OECD-level – also flies in the face of criticism that the US would not actively engage with the multilateral BEPS discussions.

"We understand governments are under enormous pressure to raise revenue and it must be tempting to target non-residents," he said, before expressing his disappointment at the DPT at an event later in the year, at which he went on to say that the DPT's introduction was probably motivated by the impending general election and a desire on the part of the government to be seen as employing a tougher stance on multinational tax avoidance than the opposition Labour party.

"[This] puts a spotlight on the degree to which political pressure can trump policy," said Stack.

The Global Tax 50 2015

View the full list and introduction

The top 10 • Ranked in order of influence

1. Margrethe Vestager

2. Pascal Saint-Amans

3. Wang Jun

4. Arun Jaitley

5. Marissa Mayer

6. Will Morris

7. Ian Read

8. Pierre Moscovici

9. Donato Raponi

10. Global Alliance for Tax Justice

The remaining 40 • In alphabetic order

Brigitte Alepin

Andrus Ansip

Tamara Ashford

Mohammed Amine Baina

Piet Battiau

Elise Bean

Monica Bhatia

David Bradbury

Winnie Byanyima

Mauricio Cardenas

Allison Christians

Rita de la Feria

Marlies de Ruiter

Judith Freedman

Meg Hillier

Vanessa Houlder

Kim Jacinto-Henares

Eva Joly

Chris Jordan

Jean-Claude Juncker

Alain Lamassoure

Juliane Kokott

Armando Lara Yaffar

Liao Tizhong

Paige Marvel

Angela Merkel

Zach Mider

Richard Murphy

George Osborne

Achim Pross

Akhilesh Ranjan

Alan Robertson

Paul Ryan

Tove Maria Ryding

Magdalena Sepulveda Carmona

Lee Sheppard

Parthasarathi Shome

Robert Stack

Mike Williams

Ya-wen Yang

more across site & shared bottom lb ros

More from across our site

Wingrove will succeed Bill Thomas, who has served in the role since 2017; in other news, Andersen unveiled a sharp increase in revenues for 2025
Partners are divided on Italy vs PDM D’s analytical depth, evidentiary standards, and what the judgment signals for future intra-group financing cases
As GCCs increasingly become strategic hubs, multinationals face heightened risks around permanent establishment and place of effective management
While all options presented ‘drawbacks’, European Commission tax leader Wopke Hoekstra said the controversial US carve-out deal has ‘many benefits’
From tech preparations to competitiveness concerns, Tax Systems’ Russell Gammon addresses the most pressing client considerations arising from the SbS deal
Despite estimates that the US/OECD agreement will cost countries billions, the Fair Tax Foundation’s Paul Monaghan believes the deal is a ‘necessary evil’
The firm’s eye-catching UK launch is a major statement of intent, but it will face stern opposition in its quest to be the top global tax player
The postponement came after industry representatives flagged implementation issues with the registration regime; in other news, firms made key tax partner additions
Despite the increased yield, the time taken to resolve enquiries was at a six-year high, new HMRC statistics have revealed
The High Court’s dismissal of barrister Setu Kamal’s legal challenge represents the first successful strike-out under a new law on SLAPPs
Gift this article