WPP PLC WPP shares sank 18.76% to £4.29 Wednesday, on what proved to be an all-around favorable trading session for the stock market, with the FTSE 100 Index UKX rising 0.15% to 8,867.02. WPP PLC closed 52.

WPP sent jitters across Madison Avenue with an unexpected profit warning Wednesday. The threat of AI isn't helping.

WPP now expects a 2025 like-for-like revenue decline, excluding pass through costs, of between 3% and 5%. It predicts a decline in headline operating profit margin of 50 to 175 basis points, excluding foreign exchange.

WPP Plc. cut its outlook for 2025 after clients spent less than expected, adding to the advertising agency’s woes as it searches for a new chief executive officer. Shares fell to their lowest level in almost 16 years.

Like-for-like revenues (excluding pass through costs) are expected to drop between 3% and 5%, the FTSE 100 advertising giant said.

Shares in London-based advertising giant WPP plunged 18%, stoking anxiety about the ad business as it battles economic jitters and the rise of AI.

WPP PLC closed 41.57% below its 52-week high of £9.03, which the company achieved on December 9th.

European stocks rose for a third day, with banks leading gains on the back of a rally in UniCredit SpA, while advertising group WPP Plc sank 15% after it tempered its revenue outlook.