Jonathan Parker

jonathan.parker@lw.com

+44.20.7710.4513

“Extremely pragmatic and responsive, with an in-depth knowledge of UK competition law. He is our go-to person for complex matters. We highly recommend him.”

Chambers UK 2026

"An absolute star, working with him is a joy."

Chambers UK 2026

"Very intelligent and has a great understanding of the commercial dynamics in our industry."

Chambers UK 2026

“Very strong on UK mergers with an unparalleled knowledge of process and the likely concerns of an agency.”

Chambers UK 2026

"Complete encyclopedic knowledge of merger law, is extremely level-headed and has a very quick intellect."

Chambers UK 2025

"Knowledgeable with amazing insights into the CMA's operations. He has been instrumental in the successful outcome of our cases."

Legal 500 UK 2025

Leading Partner – EU & Competition

Legal 500 UK 2026

Band 2 – Competition Law

Chambers UK 2025-2026

Thought Leaders – Competition

Lexology Index 2025

"Confident presence on calls and has the knowledge and charisma to put the minds of some of the more sophisticated clients in the world at ease."

Chambers UK 2025

Profile

Jonathan Parker is a partner in the Antitrust & Competition Practice in Latham & Watkins’ London office, focusing on European and UK competition law.

Prior to joining Latham, Jonathan was the Director of Mergers at the UK Competition and Markets Authority (CMA). He is also the author of the leading textbook, UK Merger Control (2nd edition 2016), which has been described in reviews as “an invaluable practical guide for practitioners” and as “the epitome of analysis of UK merger control.”

He is a member of the Competition Law Committee of the City of London Law Society.

Experience

Jonathan’s experience includes advising:

Paramount Skydance Corporation on its US$110 billion acquisition of Warner Bros. Discovery
Venator Materials UK on its acquisition by LB Group
Omnicom on the acquisition of Interpublic
SLB on the acquisition of ChampionX
Viasat on its acquisition of Inmarsat
Advanced Micro Devices (AMD) on its acquisition of Xilinx
NVIDIA on its proposed acquisition of Arm
Meta on its proposed acquisition of Giphy
Demant on the sale of its Oticon Medical business to Cochlear
KKR on its acquisition of OverDrive
American Airlines in relation to the CMA’s investigation of its Atlantic Joint Business with British Airways
iZettle on the CMA’s Phase 2 investigation into its acquisition by PayPal
Rowan Companies on its merger with Ensco
Electro Rent Corporation in relation to the CMA’s Phase 2 investigation of its acquisition of Microlease Inc and the subsequent CAT appeal
Integra LifeSciences of the CMA’s investigation into its acquisition of Codman’s Neurosurgery business
Survitec Group in relation to the CMA’s investigation into its acquisition of the marine safety business of Wilhelmsen Maritime Services AS
Hytera Communications in relation to the Secretary of State’s public interest intervention regarding its acquisition of Sepura
ACCO in relation to the CMA’s investigation into its acquisition of Esselte
Bain Capital in relation to the CMA’s investigation into its acquisition of Gruppo Cordenons
GTCR in relation to the UK merger filing for its acquisition of PR Newswire
A global pharmaceutical company in relation to the CMA’s Competition Act investigation into alleged excessive pricing of hydrocortisone tablets
A party in relation to the CMA’s civil and criminal investigation into suspect cartel arrangements in the supply of products to the construction industry