Trinseo stock resets two shareholder meetings for September 30

Trinseo stock now has two shareholder meetings scheduled for September 30, 2026, after the September 23 meetings were adjourned when quorum requirements were not met, according to Investing.com. The reset creates two dated governance checkpoints for shareholders.

Two meetings share one date

The annual general meeting is scheduled for 8:30 a.m. EST on September 30, while the extraordinary general meeting follows at 8:45 a.m. EST, according to Stock Titan. The annual meeting keeps the original proposals, whereas the extraordinary meeting has no resolutions scheduled for a vote.

Eligibility dates differ between the two meetings. Shareholders of record on July 30, 2026, remain eligible for the annual meeting, while the extraordinary meeting uses August 12, 2026, as its record date.

PMMA pricing adds an operating signal

Trinseo also announced a EUR 250 per ton increase for Altuglas PMMA in Europe, the Middle East and Africa, effective October 1, 2026, according to KunststoffWeb. The timing places pricing action one day after the rescheduled meetings, giving investors a concrete commercial date alongside the governance calendar.

September 30 is the next checkpoint

The company is incorporated in Ireland and has its principal executive offices in Wayne, Pennsylvania. The September 23 filing identifies Trinseo PLC, filing ticker TSEOQ and trading symbol TSEOF, while classifying the business under specialty chemicals.

For investors, the immediate timeline is defined by three dates: July 30 and August 12 for voting eligibility, followed by September 30 for both meetings. The PMMA increase then takes effect on October 1, 2026, making the first days of October the next operating date to track.