🕵️ Trinseo PLC ($TSEOQ)
SEC insider & ownership activity, last 12 months · CIK 1519061 · every row links its SEC filing
Insiders were quiet over the last 12 months – no open-market buys or sells. 2 red-flag 8-Ks in the window, most recently Bankruptcy (1.03), May 25, 2026.
Insider flow
0 buyers, $0 (0 lots) · 0 sellers, $0 (0 lots)
No open-market insider transactions in the last 12 months.
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| NUT Tree Capital Management, LP | 8.3% | 13G | May 15, 2026 | filing ↗ | |
| NUT Tree Capital Management GP, LLC | 8.3% | 13G | May 15, 2026 | filing ↗ | |
| Jared R. Nussbaum | 8.3% | 13G | May 15, 2026 | filing ↗ | |
| BlackRock, Inc. | 6.3% | 13G | Jul 17, 2025 | filing ↗ | |
| Charles Schwab Investment Management Inc | 5.8% | 13G | Feb 12, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Other events (8.01) | Aug 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 14, 2026 | filing ↗ |
| Earnings (2.02) | Aug 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 6, 2026 | filing ↗ |
| Other events (8.01) | Jul 17, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 28, 2026 | filing ↗ |
| Material agreement (1.01) | May 28, 2026 | filing ↗ |
| New financial obligation (2.03) | May 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 28, 2026 | filing ↗ |
| Bankruptcy (1.03) | May 25, 2026 | filing ↗ |
| Debt acceleration (2.04) | May 25, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 25, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 25, 2026 | filing ↗ |
| Material agreement (1.01) | May 15, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 15, 2026 | filing ↗ |
| Material agreement (1.01) | May 13, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 13, 2026 | filing ↗ |
| Material agreement (1.01) | Apr 30, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Earnings (2.02) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 14, 2026 | filing ↗ |
| Material agreement (1.01) | Apr 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 10, 2026 | filing ↗ |
| Material agreement (1.01) | Mar 19, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 19, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 19, 2026 | filing ↗ |