S4 Capital sales fall as tech clients divert cash to AI build-out Media Sir Martin Sorrell’s S4 Capital has been hit with sliding sales as its biggest clients spend less on advertising and more on building AI. The digital advertising group behind Monks reported revenue of £754.8m for 2025, down 11 per cent from £848.2m a year earlier. Net revenue fell 10.8 per cent to £673m, reflecting weaker [...]
S4 Capital: Revenue down and debt up at Sir Martin Sorrell’s ad giant Media Sir Martin Sorrell’s S4 Capital’s post-pandemic struggles have carried through into its latest results, which revealed a sharp decline in revenue and ballooning debt. The London-listed media holding group, which ad guru Sorrell founded after a sudden exit from WPP in 2018, saw its net revenue reduce by 15.6 per cent from £445.5m to £375.1m [...]