Why is Dentsu stock sliding today?

Dentsu's stock experienced a significant drop of 8.2% to ¥3,469 on Monday due to two troubling developments. The company's first-half 2026 earnings report showed disappointing results, although the firm managed to turn a profit for the six months ended June 30. This profit was largely a result of a one-off gain from selling the Dentsu Ginza building, but the company didn't face the substantial depreciation-related write-down that occurred in 2025.

Despite this, underlying operating profit still managed to improve marginally to 71.98 billion yen. Nonetheless, the company's structural issues remain a concern. All three of Dentsu's international segments - Americas, EMEA, and Asia Pacific - saw negative organic growth in the first half of the year. The company's full-year guidance suggests that adjusted operating profit will decrease by around 3.6% year-on-year.

These earnings disappointments are further compounded by reports that the process to sell Dentsu's international operations has effectively stalled, with Apollo Global already withdrawing from the deal. Bain Capital, the sole remaining bidder, is reportedly unlikely to proceed with a transaction. The overall performance of the Japanese market has not provided much solace, as the Nikkei 225 faces persistent challenges from yen strengthening pressures and Bank of Japan rate hike expectations, which have negatively impacted equities across the board.

Advertising sector peers such as Hakuhodo DY Holdings and Publicis Groupe are similarly grappling with a challenging global advertising market, where client spending caution and geopolitical uncertainty continue to stifle international revenue growth.