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 |
|---|---|---|---|---|---|
| Rothschild Investment LLC | 1 | $0 | 0.00% | +1 | New |
| SBI Securities Co., Ltd. | 4 | $2 | 0.00% | 00.0% | Unchanged |
| Essential Partners LLC | 9 | $4 | 0.00% | +1+12.5% | Added |
| IFP Advisors, Inc | 13 | $6 | 0.00% | −1−7.1% | Reduced |
| True Wealth Design, LLC | 11 | $6 | 0.00% | +11 | New |
| Allworth Financial LP | 19 | $10 | 0.00% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 86 | $43 | 0.00% | −914−91.4% | Reduced |
| Rockefeller Capital Management L.P. | 160 | $80 | 0.00% | 00.0% | Unchanged |
| Torren Management, LLC | 178 | $88 | 0.00% | +178 | New |
| Advisor Group Holdings, Inc. | 231 | $115 | 0.00% | −6−2.5% | Reduced |
| Stephens Consulting, LLC | 231 | $115 | 0.00% | 00.0% | Unchanged |
| SWAN Capital LLC | 250 | $124 | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 722 | $359 | 0.00% | −2,353−76.5% | Reduced |
| Citigroup Inc | 770 | $383 | 0.00% | +251+48.4% | Added |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 1,000 | $497 | 0.00% | +1,000 | New |
| GAMMA Investing LLC | 1,052 | $523 | 0.00% | +1,052 | New |
| McIlrath & Eck, LLC | 1,444 | $718 | 0.00% | 00.0% | Unchanged |
| 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 |
| California State Teachers Retirement System | 2,091 | $1.04K | 0.00% | −35−1.6% | Reduced |
| Sterling Capital Management LLC | 2,349 | $1.17K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 2,820 | $1.40K | 0.00% | −10,456−78.8% | Reduced |
| Legal & General Group Plc | 3,098 | $1.54K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 3,476 | $1.73K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 5,085 | $2.53K | 0.00% | −5−0.1% | Reduced |
| BNP Paribas Arbitrage, SA | 8,370 | $4.16K | 0.00% | −15,084−64.3% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 8,769 | $4.36K | 0.00% | 00.0% | Unchanged |
| Ewa, LLC | 10,493 | $5.21K | 0.00% | +10,493 | New |
| Ethic Inc. | 11,547 | $5.74K | 0.00% | +11,547 | New |
| Ground Swell Capital, LLC | 11,765 | $5.85K | 0.01% | +11,765 | New |
| Red Door Wealth Management, LLC | 15,000 | $7.46K | 0.00% | 00.0% | Unchanged |
| Intech Investment Management LLC | 15,209 | $7.56K | 0.00% | −845−5.3% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 16,342 | $8.12K | 0.00% | +528+3.3% | Added |
| Tower Research Capital LLC (TRC) | 16,406 | $8.15K | 0.00% | +11,573+239.5% | Added |
| Strategies Wealth Advisors, LLC | 18,023 | $8.96K | 0.00% | +18,023 | New |
| JPMorgan Chase & Co | 18,518 | $9.20K | 0.00% | −7,805−29.7% | Reduced |
| VestGen Advisors, LLC | 18,610 | $9.25K | 0.00% | +18,610 | New |
| Jain Global LLC | 19,119 | $9.50K | 0.00% | +19,119 | New |
| Rhumbline Advisers | 21,942 | $10.9K | 0.00% | −10,786−33.0% | Reduced |
| New York State Common Retirement Fund | 29,500 | $14.7K | 0.00% | 00.0% | Unchanged |
| AQR Capital Management LLC | 33,646 | $16.7K | 0.00% | +9,063+36.9% | Added |
| HRT Financial LP | 37,379 | $18.0K | 0.00% | +37,379 | New |
| Wells Fargo & Company | 38,474 | $19.1K | 0.00% | +10,195+36.1% | Added |
| Mariner, LLC | 39,200 | $19.5K | 0.00% | 00.0% | Unchanged |
| Bank of America Corp | 39,804 | $19.8K | 0.00% | −323,837−89.1% | Reduced |
| Price T Rowe Associates Inc | 40,483 | $20.0K | 0.00% | 00.0% | Unchanged |
| Nuveen, LLC | 44,280 | $22.0K | 0.00% | 00.0% | Unchanged |
| Kohmann Bosshard Financial Services, LLC | 44,605 | $22.2K | 0.00% | 00.0% | Unchanged |
| Barclays PLC | 53,255 | $26.5K | 0.00% | +5,273+11.0% | Added |
| FMR LLC | 67,624 | $33.6K | 0.00% | +17,042+33.7% | Added |
| Invesco Ltd. | 70,320 | $34.9K | 0.00% | −61,482−46.6% | Reduced |
| Bank of New York Mellon Corp | 80,741 | $40.1K | 0.00% | −661−0.8% | Reduced |
| Dimensional Fund Advisors LP | 98,606 | $49.1K | 0.00% | −19,063−16.2% | Reduced |
| Deutsche Bank AG | 125,610 | $62.8K | 0.00% | +96,825+336.4% | Added |
| Alta Fundamental Advisers LLC | 152,974 | $76.0K | 0.04% | 00.0% | Unchanged |
| UBS Group AG | 184,497 | $91.7K | 0.00% | −15,307−7.7% | Reduced |
| Northern Trust Corp | 245,801 | $122.2K | 0.00% | −22,888−8.5% | Reduced |
| Renaissance Technologies LLC | 276,100 | $137.2K | 0.00% | −38,600−12.3% | Reduced |
| Lakewood Capital Management, LP | 281,279 | $139.8K | 0.01% | 00.0% | Unchanged |
| State Street Corp | 478,033 | $237.6K | 0.00% | +54,247+12.8% | Added |
| Gsa Capital Partners LLP | 511,342 | $254.0K | 0.02% | +511,342 | New |
| CastleKnight Management LP | 516,826 | $256.9K | 0.01% | −1,950,000−79.0% | Reduced |
| Morgan Stanley | 536,422 | $266.6K | 0.00% | +82,135+18.1% | Added |
| Goldman Sachs Group Inc | 580,623 | $288.6K | 0.00% | +454,630+360.8% | Added |
| Vanguard Group Inc | 762,828 | $379.1K | 0.00% | +7,185+1.0% | Added |
| Geode Capital Management, LLC | 841,720 | $418.4K | 0.00% | −1080.0% | Reduced |
| Icon Advisers Inc | 1,000,000 | $497.0K | 0.11% | 00.0% | Unchanged |
| Owl Creek Asset Management, L.P. | 1,669,952 | $830.0K | 0.10% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 2,091,125 | $1.04M | 0.00% | +586,057+38.9% | Added |
| BlackRock, Inc. | 2,413,178 | $1.20M | 0.00% | +43,506+1.8% | Added |
| Nut Tree Capital Management, LP | – | $1.74M | 0.33% | – | – |
| M&G Plc | 7,625,044 | $3.79M | 0.02% | 00.0% | Unchanged |
| 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 |