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.
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Wondering where the real value hides? Check the filings most investors skim:
- 10-K annual report: Polymer Solutions revenue drivers and environmental remediation reserves—“Trinseo annual report 10-K simplified”.
- 10-Q quarterly update: Styrene index movements and working-capital swings—perfect for “Trinseo earnings report filing analysis”.
- Form 4: Real-time “Trinseo executive stock transactions Form 4” to gauge insider sentiment.
- DEF 14A proxy: “Trinseo proxy statement executive compensation” details leadership incentives tied to resin margins.
- 8-K: Immediate alerts when plant outages or material agreements hit—“Trinseo 8-K material events explained”.
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Trinseo PLC reported a wider quarterly loss and lower sales in Q3 2025. Net sales were $743.2 million, down from $867.7 million a year ago, and gross profit fell to $37.4 million. The Company posted an operating loss of $28.2 million and a net loss of $109.7 million, compared with a net loss of $87.3 million in the prior-year period.
Year-to-date, net sales were $2,312.3 million with a net loss of $294.2 million. Interest expense remained elevated at $70.6 million for the quarter and $206.7 million year-to-date. Cash and cash equivalents were $112.1 million, and total debt (less unamortized deferred financing fees) was $2,522.9 million. Shareholders’ equity was a deficit of $861.6 million.
The Company continued restructuring efforts. Q3 activity under the 2024 Restructuring Plan and Stade Shutdown totaled $1.9 million of charges, and the 2023 plan recorded $1.8 million of charges. On October 2, 2025, Trinseo approved an MMA Restructuring Plan in Italy, with expected pre-tax charges of $80.0 million to $100.0 million and anticipated cash payments of $40.0 million to $50.0 million, with substantially all payments expected by the end of 2028.
Trinseo PLC (TSE) furnished a press release announcing its financial results for the third quarter and year ended September 30, 2025, and will host an investor call and webcast on November 7, 2025 at 10:30 AM Eastern Time to discuss the results. The company also made an investor presentation available on its website. The press release is furnished as Exhibit 99.1 and the investor presentation as Exhibit 99.2.
Insider transaction summary: An officer of Trinseo PLC reported a share disposition on
Johanna Frisch, VP and Treasurer of Trinseo PLC (TSE), reported a transaction on 09/30/2025 in which 2,194 ordinary shares were disposed of at a price of $2.35 per share. The filing states these shares were withheld by the company to pay taxes following the vesting of previously granted restricted stock units. After the withholding, the reporting person beneficially owned 15,898 ordinary shares. The Form 4 was signed by an attorney-in-fact on 10/02/2025.
Roger Greene, VP, Global Controller & PAO of Trinseo PLC (TSE), reported a transaction on 09/25/2025 in which 1,617 ordinary shares were disposed at $2.57 per share. The Form 4 indicates the shares were withheld by the company to pay taxes following the vesting of restricted stock units, and the reporting person now directly beneficially owns 49,856 shares. The filing was signed by an attorney-in-fact on behalf of the reporting person on 09/29/2025. The disclosure is a routine insider tax-withholding event rather than an open-market sale.
CastleKnight-related entities and Aaron Weitman reported ownership of 2,766,226 ordinary shares of Trinseo PLC, representing 7.8% of the class. The filing shows the stake is held with shared voting and shared dispositive power (no sole voting or sole dispositive power reported). The reporting group identifies six related entities/persons that each report the same aggregate amount and percent, and the filing includes exhibits for a joint filing agreement and control-person identification. The statement also certifies the position is not held to influence control of the issuer.
Trinseo PLC (TSE) director Matthew Farrell made open-market purchases totaling 100,000 ordinary shares across August 12-14, 2025, raising his beneficial ownership to 250,225 shares. The reported weighted-average prices were $2.29 on 08/12, $2.45 on 08/13 and $2.43 on 08/14, with per-trade price ranges disclosed for each date. The purchases were reported on Form 4 and executed by an attorney-in-fact; full per-price breakdowns are available upon request as noted in the filing.
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