Content practice continues to experience weakness.
WPP was weakest performer among 'big four'.
Financial results have now been published having been postponed twice.
Analysts warn of continued pressure on S4 Capital's share price after the company postponed the publication of its 2021 financial results.
S4 Capital reports 71% y/y increase in organic revenue in Q1 2021 thanks to 'whopper' accounts, raises annual target.
Former WPP chief was angry that ex-colleague called S4 Capital 'speck in rear-view mirror'.
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