Tech Power List

GroupM’s Brian Lesser is a change agent amid generational advertising shifts

Tech Power 2025 - Brian Lesser - Global CEO, GroupM
Brian Lesser, GroupM global CEO, oversaw investments in AI and data that are remaking the agency's business. (Brian Lesser)
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By:
Garett Sloane
May 19, 2025 09:00 AM

Featured Stories

Agencies
WPP launches rare public attack on Publicis over ad quality, escalating feud

WPP Media has issued a report attacking the quality of desktop and mobile inventory sold via Publicis Groupe's Epsilon SSP, a rarity even among industry rivals.

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By:
Jack Neff
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By:
Ewan Larkin
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By:
Brian Bonilla
WPP launches rare public attack on Publicis over ad quality, escalating feud
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AI search is upending the PR industry—how brands and agencies need to adapt
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Asa Hiken
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Agencies
TBWA\Chiat\Day plots its next chapter with slew of executive hires
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TBWA\Chiat\Day plots its next chapter with slew of executive hires
Opinion
Why Cannes is actually still relevant in 2025
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By:
M.T. Fletcher
Why Cannes is actually still relevant in 2025