Trinseo PLC Form 4 insider transactions

Director Sandra Beach Lin voluntarily forfeited 42,484 unvested restricted stock units of Trinseo PLC.

Trinseo PLC director Jeanmarie F. Desmond voluntarily forfeited unvested restricted stock units.

Trinseo PLC Director Jeffrey J. Cote voluntarily forfeited unvested restricted stock units and reported changes in beneficial ownership of ordinary shares.

Trinseo PLC director Joseph Alvarado voluntarily forfeited unvested restricted stock units (RSUs) on May 12, 2026.

Trinseo PLC director KLynne Johnson voluntarily forfeited a portion of her unvested restricted stock units.

Victoria Brifo, a Director at Trinseo PLC, voluntarily forfeited unvested restricted stock units on May 12, 2026.

Trinseo PLC Director Matthew Farrell voluntarily forfeited a significant number of unvested restricted stock units (RSUs) on May 12, 2026.

Trinseo PLC director Henri Steinmetz voluntarily forfeited unvested restricted stock units.

Trinseo PLC's SVP of Latex Binders, Arthas Bing Yang, reported a disposition of 2,548 ordinary shares for tax withholding purposes related to vested restricted stock units.

Trinseo PLC's SVP of Corporate Finance & IR, Bregje van Kessel, disposed of 6,064 ordinary shares to cover tax liabilities from vested restricted stock units.

Trinseo PLC's SVP of Supply Chain & Manufacturing Services, Rainer Schewe, reported a disposition of 4,028 ordinary shares for tax withholding purposes following restricted stock unit vesting.

Trinseo PLC's SVP, Francesca Reverberi, reported the disposition of 1,385 ordinary shares for tax withholding purposes following the vesting of restricted stock units.

Trinseo's SVP and Chief Technology Officer, Han Hendriks, disposed of 7,707 ordinary shares to cover tax liabilities following the vesting of restricted stock units.

Trinseo PLC's VP, Global Controller & PAO, Roger Greene, reported a future disposition of 2,517 ordinary shares to cover tax liabilities from restricted stock unit vesting.

Trinseo's SVP and CHRO, Paula M. Cooney, disposed of 7,670 ordinary shares to cover tax liabilities related to vested restricted stock units.

Trinseo PLC's SVP, CLO, CCO & Corporate Secretary, Angelo N. Chaclas, reported a disposition of 7,607 ordinary shares for tax withholding purposes.

Trinseo's EVP and CFO, David Phillip Stasse, reported a future disposal of 10,366 ordinary shares on February 27, 2026, to satisfy tax liabilities from vested restricted stock units.

Trinseo PLC's CEO, Frank A. Bozich, reported the disposal of 23,680 ordinary shares to cover tax liabilities associated with restricted stock unit vesting.

Trinseo PLC's SVP, Francesca Reverberi, executed a routine disposal of company shares to cover tax liabilities associated with vested restricted stock units.

Trinseo PLC's SVP and Chief Technology Officer, Han Hendriks, reported tax-related share withholdings following restricted stock unit vesting.

Trinseo PLC's SVP of Latex Binders, Arthas Bing Yang, disposed of ordinary shares to cover tax liabilities from vested restricted stock units.

Trinseo PLC's SVP of Corporate Finance & IR, Bregje van Kessel, reported the disposition of ordinary shares to cover tax obligations related to vested restricted stock units.

Trinseo PLC's SVP, Supply Chain & Manufacturing Services, Rainer Schewe, had shares withheld by the company to cover tax obligations following the vesting of restricted stock units.

Trinseo PLC's SVP and CHRO, Paula M. Cooney, reported the disposition of ordinary shares to cover tax liabilities from restricted stock unit vesting.

Trinseo PLC's VP, Global Controller & PAO, Roger Greene, reported a routine disposition of 2,238 ordinary shares for tax obligations following restricted stock unit vesting.

Trinseo PLC's EVP and CFO, David Phillip Stasse, reported the disposition of ordinary shares to cover tax liabilities from vested restricted stock units.

Trinseo PLC's CEO and President, Frank A. Bozich, reported the disposition of 32,602 ordinary shares to cover tax liabilities related to restricted stock unit vesting.

Trinseo PLC's SVP, CLO, CCO & Corporate Secretary, Angelo N. Chaclas, disposed of ordinary shares to cover tax liabilities from vested restricted stock units.

Trinseo PLC's SVP and Chief Technology Officer, Han Hendriks, disposed of 2,067 ordinary shares to cover tax liabilities from restricted stock unit vesting.

Trinseo PLC's VP and Treasurer, Johanna Frisch, disposed of 2,194 ordinary shares to cover tax liabilities from vested restricted stock units.