Greg Bonné advises clients on a wide range of cross-border antitrust and competition matters, particularly those involving merger control investigations.

Mr. Bonné guides international private equity firms, their portfolio companies, and other private and public companies on a wide range of UK and EU competition issues, including:

  • Mergers and acquisitions
  • UK Competition and Markets Authority (CMA) initial enforcement orders
  • Market studies and investigations
  • Antitrust investigations
  • Foreign investment control
  • Competition litigation and judicial review

He leverages a comprehensive understanding of the UK merger control regime and extensive experience navigating cross-jurisdictional parallel reviews involving the US Department of Justice / US Federal Trade Commission, the European Commission, and the CMA to help clients identify and mitigate intervention risk.

Before joining Latham, Mr. Bonné worked for more than five years at the CMA as an Assistant Director of Mergers and Phase 2 Project Director, where he coordinated over 100 UK merger control investigations and served on the Mergers Intelligence Committee.

Mr. Bonné has appeared before the Competition Appeal Tribunal and the Court of Appeal in England and Wales.

Mr. Bonné’s experience includes advising:

Merger Control

  • 888 on its acquisition of William Hill’s non-US business
  • Affera on its sale to Medtronics
  • Astorg on its acquisition of Corsearch
  • Aviva on a property joint venture with PSP
  • La Caisse de dépôt et placement du Québec (CDPQ) on its acquisition of FNZ and follow-on acquisition of ebase, which was cleared in Germany and Austria following Phase 1 investigations
  • CBS on a TV channel joint venture with Liberty Group that triggered merger filings in Austria, Germany, and Poland*
  • CD&R on its acquisition of Morrisons
  • Chemocentryx on its sale to Amgen
  • ERT on its acquisition of Bioclinica
  • Kellogg’s on its acquisition of the Pringles snacks business for US$2.7 billion, which triggered merger filings in the EU, the US, Turkey, South Korea, and Ukraine*
  • Kerry Group on its US$230 million acquisition of Cargill Flavors Systems, which triggered merger filings in Ireland, the US, and Brazil*
  • KKR on its acquisition of OverDrive, which the CMA cleared unconditionally
  • A global energy leader on its sale of liquefied natural gas assets to Pavilion Energy, which was cleared following a Phase 1 European Commission investigation
  • Illinois Toolworks on its acquisition of MTS
  • iZettle on its sale to Paypal Holdings, which was cleared following a Phase 2 CMA investigation
  • Lineage Logistics on its acquisition of Kloosterboer
  • Live Nation on its acquisition of events promoter MCD, which was cleared following a Phase 2 CMA investigation
  • Meta on its acquisition of Giphy
  • Onex on its sale of Parkdean
  • Peabody Energy on its AUS$5 billion acquisition of Macarthur Coal, which triggered merger filings in Brazil, Korea, Japan, and China*
  • Rowan on its merger with Ensco, which was cleared following a Phase 1 CMA investigation
  • SIG Combibloc on obtaining global merger control clearances for its acquisition of Scholle IPN

Significant Merger Investigations at the CMA

Merger investigations into:

  • Intercontinental Exchange’s acquisition of Trayport*
  • Tullett Prebon’s acquisition of ICAP*
  • Greene King’s acquisition of the Spirit Group*
  • BT’s acquisition of EE*
  • Ryanair’s minority stake in Aer Lingus*
  • AG Barr’s acquisition of Britvic*
  • Breedon’s acquisition of Aggregate Industries*


  • Meta in UK litigation before the Competition Appeal Tribunal and Court of Appeal in connection with its acquisition of Giphy
  • The CMA in various judicial review proceedings*

Market Studies, Market Investigations, and Antitrust Investigations

  • A CMA market investigation into the audit industry*
  • A CMA cartel investigation in the construction industry*

*Matter handled prior to joining Latham

Bar Qualification

  • England and Wales (Solicitor)


  • LPC, College of Law, York, 2008
  • GDL, College of Law, York, 2007
  • BA (Hons) History, York University, 2006

Languages Spoken

  • English