Welcome to our dedicated page for Trinseo Plc SEC filings (Ticker: TSE), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Trinseo PLC filings document material-event disclosures for an Ireland-incorporated specialty materials issuer, including operating results, earnings-release exhibits, investor presentations, capital-structure discussions, credit-facility waivers and listing-status records. Recent Form 8-K reports address financial results and stakeholder discussions involving debt and waiver arrangements, while Form 25 records the removal of the company’s ordinary shares from NYSE listing and the transition of trading to the OTC symbol TSEOF.
Trinseo PLC executive reports routine tax-related share disposition. SVP and CHRO Paula M. Cooney had 7,670 Ordinary Shares withheld by the company at a price of $0.23 per share to cover taxes due on vested restricted stock units. After this tax-withholding event, she directly owned 118,318 Ordinary Shares.
Trinseo PLC senior executive reports tax-related share withholding
Trinseo PLC executive Angelo N. Chaclas reported a disposition of 7,607 ordinary shares on February 27, 2026. The transaction was a tax-withholding disposition, where shares were withheld by the company to cover taxes due upon vesting of restricted stock units, rather than an open-market sale. After this transaction, Chaclas held 274,798 ordinary shares directly.
Trinseo PLC executive David Phillip Stasse reported a tax-related share disposition. On the tax-withholding date of vesting for previously granted restricted stock units, 10,366 Ordinary Shares were withheld by the company at a price of $0.23 per share to cover taxes. After this tax-withholding disposition, Stasse directly owned 254,788 Ordinary Shares.
Trinseo PLC reported that CEO and President Frank A. Bozich had 23,680 Ordinary Shares withheld by the company at a price of $0.23 per share to cover taxes due upon the vesting of restricted stock units. Following this tax-withholding disposition, he directly holds 664,689 Ordinary Shares.
Trinseo PLC received notice from the New York Stock Exchange that it will begin delisting the company’s ordinary shares after Trinseo failed to meet the NYSE’s continued listing standard requiring at least a $15 million average market capitalization over 30 trading days. Trading in the shares was suspended immediately.
The NYSE plans to file Form 25 with the SEC, and the delisting becomes effective 10 days after that filing. The company notes that this is not expected to affect its business operations, relationships with partners or employees, or SEC reporting.
Because Trinseo is an Irish company, once NYSE trading is suspended and the shares are delisted, transfers of ordinary shares will generally be subject to Irish stamp duty at 1% of the higher of purchase price or market value. DTC will stop clearing and settling trades and transfer positions to the company’s transfer agent, which may limit investors’ ability to trade unless they move holdings to another clearing agent or into direct registration. The company states its shares may trade on the OTC Pink Limited Market, but provides no assurance this will occur or continue, or that trading volume will support an efficient market.
Trinseo PLC senior vice president Francesca Reverberi reported two small share dispositions related to tax withholding, not open-market trading. On February 21 and 22, she transferred 1,163 and 333 ordinary shares, respectively, at $0.3276 per share to cover tax liabilities on vesting restricted stock units.
After these tax-withholding dispositions, Reverberi directly owned 162,635 Trinseo ordinary shares. The filing clarifies the shares were withheld by the company to pay taxes due upon the vesting of previously granted restricted stock units, rather than discretionary sales in the market.
Trinseo PLC senior executive reports tax-related share dispositions. SVP and Chief Technology Officer Han Hendriks reported two Form 4 transactions where Ordinary Shares were withheld by the company to cover taxes owed on vested restricted stock units. On February 21, 2026, 6,331 Ordinary Shares were withheld at $0.3276 per share. On February 22, 2026, a further 2,291 Ordinary Shares were withheld at $0.3276 per share. These code F transactions reflect tax-withholding dispositions rather than open-market purchases or sales.
Trinseo PLC senior vice president Yang Arthas Bing reported routine share dispositions related to taxes on equity awards. On two dates in February 2026, a total of 2,445 ordinary shares were withheld by the company at a price of $0.3276 per share to cover tax liabilities when previously granted restricted stock units vested. These tax-withholding transactions were not open-market sales. After these entries, Bing directly owned 52,005 ordinary shares.
Trinseo PLC senior vice president of corporate finance and investor relations Bregje van Kessel reported two tax-related share dispositions connected to restricted stock unit vesting. On February 21, 5,963 ordinary shares at $0.3276 per share were withheld to cover taxes, followed by 1,335 shares at the same price on February 22. These were company-withheld shares for tax liabilities, not open-market sales, and she continued to hold over 100,000 ordinary shares after each transaction.
Trinseo PLC senior vice president Rainer Schewe reported routine tax-related share dispositions. On February 21 and 22, he had 3,907 and 1,206 Ordinary Shares, respectively, withheld by the company at $0.3276 per share to cover taxes due on vesting restricted stock units. These transactions were coded as tax-withholding dispositions rather than open-market sales. After the most recent transaction, Schewe directly owned 107,443 Ordinary Shares.