Mattel has appointed Lee Matheson, a partner at one of its largest shareholders, EdgePoint Investment Group, to its board of directors as the toy company navigates growing pressure from activist investors. The board addition was announced on Wednesday alongside a cooperation agreement between Mattel and EdgePoint, which holds approximately 18 percent of the company’s stock, according to Mattel CEO Roger Lynch.

The agreement reportedly includes standard voting, standstill, and confidentiality provisions. Mr. Matheson’s inclusion on the board comes amid increasing calls from investors for Mattel to reconsider its strategic direction, including potential sale options, in light of the company’s declining stock performance.

Activist investor Ariel Investments, holding a 5.4 percent stake in Mattel, publicly urged the company earlier this month to explore strategic alternatives such as divestitures, mergers, or a complete sale, citing undervaluation of the stock. Additionally, Southeastern Asset Management pushed for a sale in May, arguing that Mattel might be better positioned under private equity ownership, a competitor, or a large media company.

Interest in a potential acquisition of Mattel also emerged from Authentic Brands, which reportedly engaged in discussions for a deal that could value the company at over $20 per share, according to reports.

Mattel’s recent leadership change may influence the company’s future trajectory. In late September, Mattel surprised the market with the announcement that Roger Lynch, previously CEO of Conde Nast, would take over as CEO. Mr. Lynch has indicated plans to introduce new strategies aimed at strengthening Mattel’s portfolio of well-known brands such as Barbie and Hot Wheels.

As Mattel responds to activist shareholder demands and market pressures, the company’s strategic decisions in the near term will be closely watched by investors and industry observers alike.