Trinseo PLC - TSE
Detailed investor-level table based on 13F positions.
Early Q1 2026 data: only 1 institutional holders reported so far. The full shareholder list will grow as more funds file with the SEC.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M&G Plc | History | No change | 7,625,044 | 3,789 | 0.02% | 0.08% | 1 | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |
| Nut Tree Capital Management, LP | History | No change | 3,500,000 | 1,739 | 0.33% | 1.9% | 2 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| BlackRock, Inc. | History | Added to | 2,413,178 | 1,199 | 0.0% | 0.0% | 3 | +43,506 | 1.84% | Q4 2025 | Feb 12, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | History | Added to | 2,091,125 | 1,039 | 0.0% | 0.0% | 4 | +586,057 | 38.94% | Q4 2025 | Feb 13, 2026 |
| Owl Creek Asset Management, L.P. | History | No change | 1,669,952 | 829 | 0.03% | 0.12% | 5 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| ICON ADVISERS INC/CO | History | No change | 1,000,000 | 497 | 0.11% | 0.51% | 6 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Reduced | 841,720 | 418 | 0.0% | 0.0% | 7 | -108 | -0.01% | Q4 2025 | Feb 09, 2026 |
| VANGUARD GROUP INC | History | Added to | 762,828 | 379 | 0.0% | 0.0% | 8 | +7,185 | 0.95% | Q4 2025 | Jan 29, 2026 |
| GOLDMAN SACHS GROUP INC | History | Added to | 580,623 | 288 | 0.0% | 0.0% | 9 | +454,630 | 360.84% | Q4 2025 | Mar 25, 2026 |
| MORGAN STANLEY | History | Added to | 536,422 | 266 | 0.0% | 0.0% | 10 | +82,135 | 18.08% | Q4 2025 | Feb 13, 2026 |
| CastleKnight Management LP | History | Reduced | 516,826 | 256 | 0.01% | 0.11% | 11 | -1,950,000 | -79.05% | Q4 2025 | Feb 17, 2026 |
| GSA CAPITAL PARTNERS LLP | History | New | 511,342 | 254 | 0.02% | — | 12 | +511,342 | New | Q4 2025 | Feb 06, 2026 |
| STATE STREET CORP | History | Added to | 478,033 | 237 | 0.0% | 0.0% | 13 | +54,247 | 12.8% | Q4 2025 | Feb 13, 2026 |
| LAKEWOOD CAPITAL MANAGEMENT, LP | History | No change | 281,279 | 139 | 0.01% | 0.05% | 14 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Reduced | 276,100 | 137 | 0.0% | 0.0% | 15 | -38,600 | -12.27% | Q4 2025 | Feb 12, 2026 |
| NORTHERN TRUST CORP | History | Reduced | 245,801 | 122 | 0.0% | 0.0% | 16 | -22,888 | -8.52% | Q4 2025 | Feb 17, 2026 |
| UBS Group AG | History | Reduced | 184,497 | 91 | 0.0% | 0.0% | 17 | -15,307 | -7.66% | Q4 2025 | Jan 29, 2026 |
| Alta Fundamental Advisers LLC | History | No change | 152,974 | 76 | 0.03% | 0.15% | 18 | 0 | 0.0% | Q4 2025 | Feb 11, 2026 |
| DEUTSCHE BANK AG\ | History | Added to | 125,610 | 62 | 0.0% | 0.0% | 19 | +96,825 | 336.37% | Q4 2025 | Feb 11, 2026 |
| DIMENSIONAL FUND ADVISORS LP | History | Reduced | 98,606 | 49 | 0.0% | 0.0% | 20 | -19,063 | -16.2% | Q4 2025 | Feb 12, 2026 |
| Bank of New York Mellon Corp | History | Reduced | 80,741 | 40 | 0.0% | 0.0% | 21 | -661 | -0.81% | Q4 2025 | Feb 10, 2026 |
| Invesco Ltd. | History | Reduced | 70,320 | 34 | 0.0% | 0.0% | 22 | -61,482 | -46.65% | Q4 2025 | Feb 19, 2026 |
| FMR LLC | History | Added to | 67,624 | 33 | 0.0% | 0.0% | 23 | +17,042 | 33.69% | Q4 2025 | Feb 17, 2026 |
| BARCLAYS PLC | History | Added to | 53,255 | 26 | 0.0% | 0.0% | 24 | +5,273 | 10.99% | Q4 2025 | Feb 13, 2026 |
| Kohmann Bosshard Financial Services, LLC | History | No change | 44,605 | 22 | 0.0% | 0.01% | 25 | 0 | 0.0% | Q4 2025 | Jan 30, 2026 |
| Nuveen, LLC | History | No change | 44,280 | 22 | 0.0% | 0.0% | 26 | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | History | No change | 40,483 | 20 | 0.0% | 0.0% | 27 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Reduced | 39,804 | 19 | 0.0% | 0.0% | 28 | -323,837 | -89.05% | Q4 2025 | Feb 17, 2026 |
| WELLS FARGO & COMPANY/MN | History | Added to | 38,474 | 19 | 0.0% | 0.0% | 29 | +10,195 | 36.05% | Q4 2025 | Feb 13, 2026 |
| Mariner, LLC | History | No change | 39,200 | 19 | 0.0% | 0.0% | 30 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| HRT FINANCIAL LP | History | New | 37,379 | 18 | 0.0% | — | 31 | +37,379 | New | Q4 2025 | Feb 12, 2026 |
| AQR CAPITAL MANAGEMENT LLC | History | Added to | 33,646 | 16 | 0.0% | 0.0% | 32 | +9,063 | 36.87% | Q4 2025 | Feb 17, 2026 |
| NEW YORK STATE COMMON RETIREMENT FUND | History | No change | 29,500 | 14 | 0.0% | 0.0% | 33 | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |
| RHUMBLINE ADVISERS | History | Reduced | 21,942 | 10 | 0.0% | 0.0% | 34 | -10,786 | -32.96% | Q4 2025 | Feb 13, 2026 |
| Jain Global LLC | History | New | 19,119 | 9 | 0.0% | — | 36 | +19,119 | New | Q4 2025 | Feb 17, 2026 |
| VestGen Advisors, LLC | History | New | 18,610 | 9 | 0.0% | — | 37 | +18,610 | New | Q4 2025 | Feb 17, 2026 |
| JPMORGAN CHASE & CO | History | Reduced | 18,518 | 9 | 0.0% | 0.0% | 35 | -7,805 | -29.65% | Q4 2025 | Feb 11, 2026 |
| Strategies Wealth Advisors, LLC | History | New | 18,023 | 8 | 0.0% | — | 40 | +18,023 | New | Q4 2025 | Feb 13, 2026 |
| Tower Research Capital LLC (TRC) | History | Added to | 16,406 | 8 | 0.0% | 0.0% | 38 | +11,573 | 239.46% | Q4 2025 | Feb 17, 2026 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | History | Added to | 16,342 | 8 | 0.0% | 0.0% | 39 | +528 | 3.34% | Q4 2025 | Feb 17, 2026 |
| INTECH INVESTMENT MANAGEMENT LLC | History | Reduced | 15,209 | 7 | 0.0% | 0.0% | 41 | -845 | -5.26% | Q4 2025 | Feb 10, 2026 |
| Red Door Wealth Management, LLC | History | No change | 15,000 | 7 | 0.0% | 0.0% | 42 | 0 | 0.0% | Q4 2025 | Jan 20, 2026 |
| Ground Swell Capital, LLC | History | New | 11,765 | 5 | 0.01% | — | 43 | +11,765 | New | Q4 2025 | Feb 04, 2026 |
| Ethic Inc. | History | New | 11,547 | 5 | 0.0% | — | 44 | +11,547 | New | Q4 2025 | Feb 03, 2026 |
| EWA, LLC | History | New | 10,493 | 5 | 0.0% | — | 45 | +10,493 | New | Q4 2025 | Feb 03, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | Reduced | 8,370 | 4 | 0.0% | 0.0% | 46 | -15,084 | -64.31% | Q4 2025 | Feb 10, 2026 |
| Police & Firemen's Retirement System of New Jersey | History | No change | 8,769 | 4 | 0.0% | 0.0% | 47 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| EverSource Wealth Advisors, LLC | History | Reduced | 5,085 | 2 | 0.0% | 0.0% | 48 | -5 | -0.1% | Q4 2025 | Feb 06, 2026 |
| Russell Investments Group, Ltd. | History | Reduced | 2,820 | 1 | 0.0% | 0.0% | 56 | -10,456 | -78.76% | Q4 2025 | Feb 17, 2026 |
| ROYAL BANK OF CANADA | History | New | 2,460 | 1 | 0.0% | — | 51 | +2,460 | New | Q4 2025 | Feb 17, 2026 |
| CWM, LLC | History | Reduced | 1,259 | 1 | 0.0% | 0.0% | 55 | -429 | -25.41% | Q4 2025 | Jan 26, 2026 |
| AMALGAMATED BANK | History | Reduced | 1,070 | 1 | 0.0% | 0.0% | 50 | -93 | -8.0% | Q4 2025 | Feb 05, 2026 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | History | Reduced | 2,091 | 1 | 0.0% | 0.0% | 53 | -35 | -1.65% | Q4 2025 | Feb 17, 2026 |
| Legal & General Group Plc | History | No change | 3,098 | 1 | 0.0% | 0.0% | 49 | 0 | 0.0% | Q4 2025 | Feb 09, 2026 |
| Ameritas Investment Partners, Inc. | History | No change | 3,476 | 1 | 0.0% | 0.0% | 52 | 0 | 0.0% | Q4 2025 | Feb 11, 2026 |
| Sterling Capital Management LLC | History | No change | 2,349 | 1 | 0.0% | 0.0% | 54 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| BRIGHTLINE CAPITAL MANAGEMENT, LLC | History | Closed out | 0 | 0 | — | 1.02% | — | -1,060,000 | -100.0% | Q3 2025 | Nov 13, 2025 |
| D. E. Shaw & Co., Inc. | History | Closed out | 0 | 0 | — | 0.0% | — | -147,316 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Voleon Capital Management LP | History | Closed out | 0 | 0 | — | 0.0% | — | -82,074 | -100.0% | Q3 2025 | Nov 14, 2025 |
| TWO SIGMA INVESTMENTS, LP | History | Closed out | 0 | 0 | — | 0.0% | — | -35,714 | -100.0% | Q3 2025 | Nov 14, 2025 |
| JB CAPITAL PARTNERS LP | History | Closed out | 0 | 0 | — | 0.01% | — | -27,001 | -100.0% | Q3 2025 | Nov 14, 2025 |
| PFG Investments, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -23,004 | -100.0% | Q3 2025 | Oct 31, 2025 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Closed out | 0 | 0 | — | 0.0% | — | -11,703 | -100.0% | Q3 2025 | Nov 14, 2025 |
| GROUP ONE TRADING LLC | History | Reduced | 722 | 0 | — | 0.0% | — | -2,353 | -76.52% | Q4 2025 | Feb 12, 2026 |
| GAMMA Investing LLC | History | New | 1,052 | 0 | — | — | — | +1,052 | New | Q4 2025 | Jan 05, 2026 |
| FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. | History | New | 1,000 | 0 | — | — | — | +1,000 | New | Q4 2025 | Feb 09, 2026 |
| Steward Partners Investment Advisory, LLC | History | Reduced | 86 | 0 | — | 0.0% | — | -914 | -91.4% | Q4 2025 | Feb 12, 2026 |
| Arax Advisory Partners | History | Closed out | 0 | 0 | — | — | — | -399 | -100.0% | Q3 2025 | Nov 14, 2025 |
| CITIGROUP INC | History | Added to | 770 | 0 | — | 0.0% | — | +251 | 48.36% | Q4 2025 | Feb 13, 2026 |
| NISA INVESTMENT ADVISORS, LLC | History | Closed out | 0 | 0 | — | — | — | -246 | -100.0% | Q3 2025 | Oct 23, 2025 |
| Bare Financial Services, Inc | History | Closed out | 0 | 0 | — | — | — | -209 | -100.0% | Q3 2025 | Nov 12, 2025 |
| Torren Management, LLC | History | New | 178 | 0 | — | — | — | +178 | New | Q4 2025 | Jan 30, 2026 |
| MAI Capital Management | History | Closed out | 0 | 0 | — | — | — | -170 | -100.0% | Q3 2025 | Nov 10, 2025 |
| FIFTH THIRD BANCORP | History | Closed out | 0 | 0 | — | — | — | -70 | -100.0% | Q3 2025 | Nov 07, 2025 |
| Allworth Financial LP | History | New | 19 | 0 | — | — | — | +19 | New | Q4 2025 | Feb 05, 2026 |
| True Wealth Design, LLC | History | New | 11 | 0 | — | — | — | +11 | New | Q4 2025 | Jan 08, 2026 |
| OSAIC HOLDINGS, INC. | History | Reduced | 231 | 0 | — | — | — | -6 | -2.53% | Q4 2025 | Feb 17, 2026 |
| Sunbelt Securities, Inc. | History | Closed out | 0 | 0 | — | — | — | -3 | -100.0% | Q3 2025 | Nov 19, 2025 |
| ROTHSCHILD INVESTMENT LLC | History | New | 1 | 0 | — | — | — | +1 | New | Q4 2025 | Feb 10, 2026 |
| IFP Advisors, Inc | History | Reduced | 13 | 0 | — | — | — | -1 | -7.14% | Q4 2025 | Feb 06, 2026 |
| McIlrath & Eck, LLC | History | No change | 1,444 | 0 | — | 0.0% | — | 0 | 0.0% | Q4 2025 | Feb 03, 2026 |
| Rockefeller Capital Management L.P. | History | No change | 160 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Mar 16, 2026 |
| SBI Securities Co., Ltd. | History | No change | 4 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 03, 2026 |
| SWAN Capital LLC | History | No change | 250 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |
| Stephens Consulting, LLC | History | No change | 231 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Jan 13, 2026 |