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, Q1 2026
Institutional positions in Trinseo PLC as of Mar 31, 2026. 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
- 14
- −57 vs. Q4 2025
- Shares held
- 105.0K
- −20.4M (−99.5%) vs. Q4 2025
- Total value
- $11.0K
- −$11.9M (−99.9%) vs. Q4 2025
- New holders
- 2
- 5 more added
- Sold out
- 59
- 2 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Trinseo PLC; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Kohmann Bosshard Financial Services, LLC | 44,605 | $4.68K | 0.00% | 00.0% | Unchanged |
| Nuveen, LLC | 44,280 | $4.65K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 5,430 | $570 | 0.00% | +345+6.8% | Added |
| Barclays PLC | 4,802 | $505 | 0.00% | −48,453−91.0% | Reduced |
| GAMMA Investing LLC | 2,148 | $226 | 0.00% | +1,096+104.2% | Added |
| Rhumbline Advisers | 1,654 | $173 | 0.00% | −20,288−92.5% | Reduced |
| McIlrath & Eck, LLC | 1,444 | $152 | 0.00% | 00.0% | Unchanged |
| SWAN Capital LLC | 250 | $26 | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 160 | $17 | 0.00% | 00.0% | Unchanged |
| Essential Partners LLC | 66 | $7 | 0.00% | +57+633.3% | Added |
| Sunbelt Securities, Inc. | 64 | $7 | 0.00% | +64 | New |
| IFP Advisors, Inc | 55 | $6 | 0.00% | +42+323.1% | Added |
| Farther Finance Advisors, LLC | 15 | $2 | 0.00% | +15 | New |
| Rothschild Investment LLC | 7 | $1 | 0.00% | +6+600.0% | Added |
| M&G Plc | 0 | $0 | 0.00% | −7,625,044−100.0% | Sold out |
| Nut Tree Capital Management, LP | 0 | $0 | 0.00% | – | Sold out |
| BlackRock, Inc. | 0 | $0 | 0.00% | −2,413,178−100.0% | Sold out |
| Charles Schwab Investment Management Inc | 0 | $0 | 0.00% | −2,091,125−100.0% | Sold out |
| Owl Creek Asset Management, L.P. | 0 | $0 | 0.00% | −1,669,952−100.0% | Sold out |
| Icon Advisers Inc | 0 | $0 | 0.00% | −1,000,000−100.0% | Sold out |
| Geode Capital Management, LLC | 0 | $0 | 0.00% | −841,720−100.0% | Sold out |
| Goldman Sachs Group Inc | 0 | $0 | 0.00% | −580,623−100.0% | Sold out |
| Morgan Stanley | 0 | $0 | 0.00% | −536,422−100.0% | Sold out |
| CastleKnight Management LP | 0 | $0 | 0.00% | −516,826−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −511,342−100.0% | Sold out |
| State Street Corp | 0 | $0 | 0.00% | −478,033−100.0% | Sold out |
| Lakewood Capital Management, LP | 0 | $0 | 0.00% | −281,279−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −276,100−100.0% | Sold out |
| Northern Trust Corp | 0 | $0 | 0.00% | −245,801−100.0% | Sold out |
| UBS Group AG | 0 | $0 | 0.00% | −184,497−100.0% | Sold out |
| Alta Fundamental Advisers LLC | 0 | $0 | 0.00% | −152,974−100.0% | Sold out |
| Deutsche Bank AG | 0 | $0 | 0.00% | −125,610−100.0% | Sold out |
| Dimensional Fund Advisors LP | 0 | $0 | 0.00% | −98,606−100.0% | Sold out |
| Bank of New York Mellon Corp | 0 | $0 | 0.00% | −80,741−100.0% | Sold out |
| Invesco Ltd. | 0 | $0 | 0.00% | −70,320−100.0% | Sold out |
| FMR LLC | 0 | $0 | 0.00% | −67,624−100.0% | Sold out |
| Price T Rowe Associates Inc | 0 | $0 | 0.00% | −40,483−100.0% | Sold out |
| Bank of America Corp | 0 | $0 | 0.00% | −39,804−100.0% | Sold out |
| Mariner, LLC | 0 | $0 | 0.00% | −39,200−100.0% | Sold out |
| Wells Fargo & Company | 0 | $0 | 0.00% | −38,474−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −37,379−100.0% | Sold out |
| AQR Capital Management LLC | 0 | $0 | 0.00% | −33,646−100.0% | Sold out |
| New York State Common Retirement Fund | 0 | $0 | 0.00% | −29,500−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −19,119−100.0% | Sold out |
| VestGen Advisors, LLC | 0 | $0 | 0.00% | −18,610−100.0% | Sold out |
| JPMorgan Chase & Co | 0 | $0 | 0.00% | −18,518−100.0% | Sold out |
| Strategies Wealth Advisors, LLC | 0 | $0 | 0.00% | −18,023−100.0% | Sold out |
| Tower Research Capital LLC (TRC) | 0 | $0 | 0.00% | −16,406−100.0% | Sold out |
| Mirae Asset Global ETFs Holdings Ltd. | 0 | $0 | 0.00% | −16,342−100.0% | Sold out |
| Intech Investment Management LLC | 0 | $0 | 0.00% | −15,209−100.0% | Sold out |
| Red Door Wealth Management, LLC | 0 | $0 | 0.00% | −15,000−100.0% | Sold out |
| Ground Swell Capital, LLC | 0 | $0 | 0.00% | −11,765−100.0% | Sold out |
| Ethic Inc. | 0 | $0 | 0.00% | −11,547−100.0% | Sold out |
| Ewa, LLC | 0 | $0 | 0.00% | −10,493−100.0% | Sold out |
| Police & Firemen's Retirement System of New Jersey | 0 | $0 | 0.00% | −8,769−100.0% | Sold out |
| BNP Paribas Arbitrage, SA | 0 | $0 | 0.00% | −8,370−100.0% | Sold out |
| Ameritas Investment Partners, Inc. | 0 | $0 | 0.00% | −3,476−100.0% | Sold out |
| Legal & General Group Plc | 0 | $0 | 0.00% | −3,098−100.0% | Sold out |
| Russell Investments Group, Ltd. | 0 | $0 | 0.00% | −2,820−100.0% | Sold out |
| Sterling Capital Management LLC | 0 | $0 | 0.00% | −2,349−100.0% | Sold out |
| California State Teachers Retirement System | 0 | $0 | 0.00% | −2,091−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −1,070−100.0% | Sold out |
| Royal Bank of Canada | 0 | $0 | 0.00% | −2,460−100.0% | Sold out |
| CWM, LLC | 0 | $0 | 0.00% | −1,259−100.0% | Sold out |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |
| Citigroup Inc | 0 | $0 | 0.00% | −770−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −722−100.0% | Sold out |
| Advisor Group Holdings, Inc. | 0 | $0 | 0.00% | −231−100.0% | Sold out |
| Torren Management, LLC | 0 | $0 | 0.00% | −178−100.0% | Sold out |
| Steward Partners Investment Advisory, LLC | 0 | $0 | 0.00% | −86−100.0% | Sold out |
| Allworth Financial LP | 0 | $0 | 0.00% | −19−100.0% | Sold out |
| True Wealth Design, LLC | 0 | $0 | 0.00% | −11−100.0% | Sold out |
| SBI Securities Co., Ltd. | 0 | $0 | 0.00% | −4−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Stephens Consulting, LLC | – | – | – | – | Not filed |