Trinseo expands board to 11 members with two new directors

Trinseo PLC (NYSE: TSE) announced that its board of directors voted to expand from nine to eleven members and appointed two new independent directors on January 16, 2026.

The company appointed Carol Flaton and Jill Frizzley as independent directors, effective immediately. The board determined both directors meet independence requirements under New York Stock Exchange listing standards and rules.

The appointments fill vacancies created by the board expansion. The information was disclosed in a company statement.

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