Gabriella Griggs

Senior Associate

Gabriella Griggs is a senior associate in the Antitrust practice. She focuses on UK and EU antitrust law.


Representative matters

Raytheon on the global merger control and FDI aspects of its $120 billion defence merger with United Technologies.

ADNOC on the establishment of a strategic partnership with OCI for the production of nitrogen fertilizers.

Barry Callebaut on the Phase I clearance from the UK CMA in respect of its acquisition of Burton's Biscuit Company's chocolate manufacturing assets.

Albemarle in respect of merger clearance for its MARBL Lithium joint venture in Western Australia.

Intercontinental Exchange, Inc. (ICE) on its joint venture with ADNOC to develop and operate a new Recognised Investment Exchange in the Abu Dhabi Global Market; in connection with its appeal to the UK Competition Appeal Tribunal in relation to the CMA's final report in the ICE/Trayport merger inquiry; in respect of the CMA's review of ICE's acquisition of Trayport; in connection with its possible bid for the London Stock Exchange Group.

Glatfelter on its acquisition from Georgia-Pacific of its European nonwoven business.

ViacomCBS in respect of merger clearance for its acquisition of a 49 percent stake in Miramax.

Sompo in respect of EUMR clearance for acquisition of Endurance plc.

Paramount Pictures in connection with the European Commission's investigation into cross-border access to pay-TV.

ICIG/INEOS chlorvinyls assets advising ICIG in its acquisition of the remedy package resulting from the INEOS/Solvay PVC JV.ICIG was approved as a suitable purchaser and its acquisition was approved in Phase I.

BMI Healthcare with respect to the UK CMA Private Healthcare Market Investigation resulting in the first ever blocking minority in a CMA market investigation.

BMI Healthcare v. Competition Commission: for BMI Healthcare in its case against the CMA, the first successful judicial review quashing the CMA's procedural approach during a live inquiry.

Published Work

  • Co-Author, "Case AT.40023 Cross-border access to pay-TV: Paramount's Commitments – The Bigger Picture", Journal of European Competition Law & Practice 2017 1-3



Solicitor, England and Wales

Solicitor, Ireland, On the Roll


King College London - University of London PgDip, EU Competition Law (With Distinction)

Kaplan Law School LPC (With Distinction)

Cambridge University Selwyn College BA, Law

A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.