Mattel confirmed on May 7, 2026, that Southeastern Asset Management is urging the board to explore strategic alternatives. The investment firm holds a stake of more than 4% in the company. Southeastern's public letter suggests a formal exploration of a potential sale or merger.

The firm expressed concerns that the current compensation structure fails to incentivize the CEO to pursue a sale unless shares exceed $30. This activist pressure arrives as Mattel stock trades near its 52-week low.

Mattel stated the board will continue reviewing strategies to enhance long-term value. The company's stock price increased by 2.33% following the news. This market reaction occurred on May 8, 2026.