Trinseo PLC
TSEOQ- Exchange
- OTC
- Industry
- Plastic Materials, Synth Resins & Nonvulcan Elastomers
- SEC CIK
- 0001519061
No open-market purchases or sales by Trinseo PLC insiders were filed in the last 90 days; 6 institutions reported holding it in 13F filings for Q2 2026, worth $740 in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Trinseo PLC as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 73
- 0 vs. Q3 2025
- Shares held
- 21.3M
- −5.57M (−20.8%) vs. Q3 2025
- Total value
- $12.3M
- −$48.1M (−79.6%) vs. Q3 2025
- New holders
- 13
- 15 more added
- Sold out
- 13
- 23 more reduced
2 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting TSEOQ on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 6 | $740 |
| Q1 2026 | 14 | $11.0K |
| Q4 2025 | 73 | $12.3M |
| Q3 2025 | 75 | $60.4M |
| Q2 2025 | 80 | $85.4M |
| Q1 2025 | 85 | $95.2M |
| Q4 2024 | 95 | $126.6M |
| Q3 2024 | 71 | $116.2M |
| Q2 2024 | 98 | $56.0M |
| Q1 2024 | 109 | $105.3M |
| Q4 2023 | 128 | $241.2M |
| Q3 2023 | 146 | $241.9M |
| Q2 2023 | 145 | $418.8M |
| Q1 2023 | 167 | $695.9M |
| Q4 2022 | 182 | $746.7M |
| Q3 2022 | 182 | $585.5M |
| Q2 2022 | 194 | $1.31B |
| Q1 2022 | 189 | $1.66B |
| Q4 2021 | 185 | $1.84B |
| Q3 2021 | 184 | $1.96B |
| Q2 2021 | 214 | $2.16B |
| Q1 2021 | 209 | $2.27B |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Trinseo PLC; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| M&G Plc | 7,625,044 | $3.79M | 0.02% | 00.0% | Unchanged |
| Nut Tree Capital Management, LP | – | $1.74M | 0.33% | – | – |
| BlackRock, Inc. | 2,413,178 | $1.20M | 0.00% | +43,506+1.8% | Added |
| Charles Schwab Investment Management Inc | 2,091,125 | $1.04M | 0.00% | +586,057+38.9% | Added |
| Owl Creek Asset Management, L.P. | 1,669,952 | $830.0K | 0.10% | 00.0% | Unchanged |
| Icon Advisers Inc | 1,000,000 | $497.0K | 0.11% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 841,720 | $418.4K | 0.00% | −1080.0% | Reduced |
| Vanguard Group Inc | 762,828 | $379.1K | 0.00% | +7,185+1.0% | Added |
| Goldman Sachs Group Inc | 580,623 | $288.6K | 0.00% | +454,630+360.8% | Added |
| Morgan Stanley | 536,422 | $266.6K | 0.00% | +82,135+18.1% | Added |
| CastleKnight Management LP | 516,826 | $256.9K | 0.01% | −1,950,000−79.0% | Reduced |
| Gsa Capital Partners LLP | 511,342 | $254.0K | 0.02% | +511,342 | New |
| State Street Corp | 478,033 | $237.6K | 0.00% | +54,247+12.8% | Added |
| Lakewood Capital Management, LP | 281,279 | $139.8K | 0.01% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 276,100 | $137.2K | 0.00% | −38,600−12.3% | Reduced |
| Northern Trust Corp | 245,801 | $122.2K | 0.00% | −22,888−8.5% | Reduced |
| UBS Group AG | 184,497 | $91.7K | 0.00% | −15,307−7.7% | Reduced |
| Alta Fundamental Advisers LLC | 152,974 | $76.0K | 0.04% | 00.0% | Unchanged |
| Deutsche Bank AG | 125,610 | $62.8K | 0.00% | +96,825+336.4% | Added |
| Dimensional Fund Advisors LP | 98,606 | $49.1K | 0.00% | −19,063−16.2% | Reduced |
| Bank of New York Mellon Corp | 80,741 | $40.1K | 0.00% | −661−0.8% | Reduced |
| Invesco Ltd. | 70,320 | $34.9K | 0.00% | −61,482−46.6% | Reduced |
| FMR LLC | 67,624 | $33.6K | 0.00% | +17,042+33.7% | Added |
| Barclays PLC | 53,255 | $26.5K | 0.00% | +5,273+11.0% | Added |
| Kohmann Bosshard Financial Services, LLC | 44,605 | $22.2K | 0.00% | 00.0% | Unchanged |
| Nuveen, LLC | 44,280 | $22.0K | 0.00% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 40,483 | $20.0K | 0.00% | 00.0% | Unchanged |
| Bank of America Corp | 39,804 | $19.8K | 0.00% | −323,837−89.1% | Reduced |
| Mariner, LLC | 39,200 | $19.5K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 38,474 | $19.1K | 0.00% | +10,195+36.1% | Added |
| HRT Financial LP | 37,379 | $18.0K | 0.00% | +37,379 | New |
| AQR Capital Management LLC | 33,646 | $16.7K | 0.00% | +9,063+36.9% | Added |
| New York State Common Retirement Fund | 29,500 | $14.7K | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 21,942 | $10.9K | 0.00% | −10,786−33.0% | Reduced |
| Jain Global LLC | 19,119 | $9.50K | 0.00% | +19,119 | New |
| VestGen Advisors, LLC | 18,610 | $9.25K | 0.00% | +18,610 | New |
| JPMorgan Chase & Co | 18,518 | $9.20K | 0.00% | −7,805−29.7% | Reduced |
| Strategies Wealth Advisors, LLC | 18,023 | $8.96K | 0.00% | +18,023 | New |
| Tower Research Capital LLC (TRC) | 16,406 | $8.15K | 0.00% | +11,573+239.5% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 16,342 | $8.12K | 0.00% | +528+3.3% | Added |
| Intech Investment Management LLC | 15,209 | $7.56K | 0.00% | −845−5.3% | Reduced |
| Red Door Wealth Management, LLC | 15,000 | $7.46K | 0.00% | 00.0% | Unchanged |
| Ground Swell Capital, LLC | 11,765 | $5.85K | 0.01% | +11,765 | New |
| Ethic Inc. | 11,547 | $5.74K | 0.00% | +11,547 | New |
| Ewa, LLC | 10,493 | $5.21K | 0.00% | +10,493 | New |
| Police & Firemen's Retirement System of New Jersey | 8,769 | $4.36K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 8,370 | $4.16K | 0.00% | −15,084−64.3% | Reduced |
| EverSource Wealth Advisors, LLC | 5,085 | $2.53K | 0.00% | −5−0.1% | Reduced |
| Ameritas Investment Partners, Inc. | 3,476 | $1.73K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 3,098 | $1.54K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 2,820 | $1.40K | 0.00% | −10,456−78.8% | Reduced |
| Sterling Capital Management LLC | 2,349 | $1.17K | 0.00% | 00.0% | Unchanged |
| California State Teachers Retirement System | 2,091 | $1.04K | 0.00% | −35−1.6% | Reduced |
| Royal Bank of Canada | 2,460 | $1.00K | 0.00% | −225,361−98.9% | Reduced |
| CWM, LLC | 1,259 | $1.00K | 0.00% | −429−25.4% | Reduced |
| Amalgamated Bank | 1,070 | $1.00K | 0.00% | −93−8.0% | Reduced |
| McIlrath & Eck, LLC | 1,444 | $718 | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 1,052 | $523 | 0.00% | +1,052 | New |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 1,000 | $497 | 0.00% | +1,000 | New |
| Citigroup Inc | 770 | $383 | 0.00% | +251+48.4% | Added |
| Group One Trading, L.P. | 722 | $359 | 0.00% | −2,353−76.5% | Reduced |
| SWAN Capital LLC | 250 | $124 | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 231 | $115 | 0.00% | −6−2.5% | Reduced |
| Stephens Consulting, LLC | 231 | $115 | 0.00% | 00.0% | Unchanged |
| Torren Management, LLC | 178 | $88 | 0.00% | +178 | New |
| Rockefeller Capital Management L.P. | 160 | $80 | 0.00% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 86 | $43 | 0.00% | −914−91.4% | Reduced |
| Allworth Financial LP | 19 | $10 | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 13 | $6 | 0.00% | −1−7.1% | Reduced |
| True Wealth Design, LLC | 11 | $6 | 0.00% | +11 | New |
| Essential Partners LLC | 9 | $4 | 0.00% | +1+12.5% | Added |
| SBI Securities Co., Ltd. | 4 | $2 | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 1 | $0 | 0.00% | +1 | New |
| Brightline Capital Management, LLC | 0 | $0 | 0.00% | −1,060,000−100.0% | Sold out |
| D. E. Shaw & Co., Inc. | 0 | $0 | 0.00% | −147,316−100.0% | Sold out |
| Voleon Capital Management LP | 0 | $0 | 0.00% | −82,074−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −35,714−100.0% | Sold out |
| JB Capital Partners LP | 0 | $0 | 0.00% | −27,001−100.0% | Sold out |
| PFG Investments, LLC | 0 | $0 | 0.00% | −23,004−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −11,703−100.0% | Sold out |
| SRS Capital Advisors, Inc. | 0 | $0 | 0.00% | −399−100.0% | Sold out |
| Nisa Investment Advisors, LLC | 0 | $0 | 0.00% | −246−100.0% | Sold out |
| Bare Financial Services, Inc | 0 | $0 | 0.00% | −209−100.0% | Sold out |
| MAI Capital Management | 0 | $0 | 0.00% | −170−100.0% | Sold out |
| Fifth Third Bancorp | 0 | $0 | 0.00% | −70−100.0% | Sold out |
| Sunbelt Securities, Inc. | 0 | $0 | 0.00% | −3−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | – | – | – | – | Not filed |
| Point72 Asia (Singapore) Pte. Ltd. | – | – | – | – | Not filed |