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Publicis ended at the same share price as a week earlier, while Havas fell 6.0% following its third-quarter results.

All six publicly listed marketing and communications (marcom) groups ended the week of 6–13 October higher. S4 Capital recorded the biggest gain, rising 9.5%.

Omnicom gained 1.3 percent, closing at $75.10. On October 1, the group was named Effectiveness Company of the Year at the IPA Effectiveness Awards 2026.

The six funds followed by Marketing Report mostly posted losses between 15 and 22 September.

Havas was the only gainer. WPP closed virtually unchanged.

The six funds tracked by Marketing Report showed a mixed performance between 8 and 15 September. WPP was the biggest gainer, rising 3.1%, during a week in which LVMH awarded its Asia-Pacific media business to Publicis.

Four of the six stocks followed by Marketing Report closed lower on 1 September than on 25 August. WPP suffered the biggest decline after the Financial Times reported that the group plans to cut up to 1,000 additional jobs this year.

Only S4 Capital and Havas declined, with S4 Capital losing more than 8% in a single week.

Four of the six funds tracked by Marketing Report closed lower on 18 August than on 11 August. Only Publicis Groupe and Omnicom held their ground.

A week after the broad correction, the board turned completely green: all six tracked marcom companies ended the week of 4 to 11 August higher.

WPP posted the strongest performance with a gain of nearly 16%, followed by S4 Capital. Havas was the only company to record only marginal growth.

This week, Dentsu was the biggest gainer on the back of a series of account wins, while Omnicom came under pressure and Publicis declined despite raising its full-year outlook.

This week's developments are driven by a new round of layoffs at WPP, Havas winning the global media account for Candy Crush from Omnicom agency OMD, and Dentsu launching its own retail data infrastructure.

The biggest gains came from S4 Capital and WPP, up 14.3% and 13.6% respectively—two companies that have faced pressure over recent quarters.

The week's key developments included Adidas moving its global media business to Omnicom, the expansion of WPP Enterprise Solutions, a potential agency shift at Skechers, and reports that Dentsu plans to take its subsidiary Dentsu Soken private.

A positive week for agency networks, with Publicis posting the biggest gain and S4 Capital the only decliner

Marketing Report Markets tracks the weekly stock market performance of international marcom companies.