brian lesser
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May 08, 2025
History of GroupM 2003-2025: The world's largest media investment arm
Campaign charts the WPP media arm's history amid ongoing change under global chief executive Brian Lesser.
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May 07, 2025
GroupM to merge agency brands into single P&L
WPP to 'sunset' agency specific job titles in the shake-up.
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Apr 04, 2025
WPP acquires InfoSum to drive AI-based data offer
Brian Lesser, currently global chief executive of Group M, joined from InfoSum in September 2024.
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Mar 05, 2025
'We know that we have to be simpler': Brian Lesser lays out GroupM plans
Lesser spoke to investors at WPP’s annual results.
Jul 18, 2024
WPP appoints new global CEO of GroupM as Christian Juhl steps down
GroupM leadership shake-up to be effective from September this year.
Nov 09, 2015
Q&A: New NA CEO Brian Lesser on GroupM's digital reinvention
"I wouldn't be taking the job if I didn't have plans to do it better," says former Xaxis CEO
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