TrinseoTSEOQ
13F holders, Q3 2025 (September 30)75holders −5
15new positions
20sold out
3famous investors
$2.25avg. 13F price*
At the end of Q3 2025, 75 institutions reported holding Trinseo PLC (TSEOQ) in their 13F filings, down 5 from Q2 2025. 15 opened new positions and 20 sold out. The largest holders were M&G PLC ($15.3M), Nut Tree Capital Management, LP ($8.2M) and CastleKnight Management LP ($5.8M). 3 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- Trinseo PLC
- CUSIP
- G9059U107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 15 | $772K |
| Exits | 20 | $2.6M |
All 13F filers, Q2 2025 → Q3 2025: 1,488,321 shares bought and 2,320,354 shares sold, net −832,033 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 75 holders
| M&G PLC | 0.08% | No change | 7,625,044 | $15.3M |
| Nut Tree Capital Management, LP | 2.22% | No change | 3,500,000 | $8.2M |
| CastleKnight Management LP | 0.31% | Reduce -10.8% | 2,466,826 | $5.8M |
| BlackRock, Inc. | 0.00% | Add +5.1% | 2,369,672 | $5.6M |
| Owl Creek Asset Management, L.P. | 0.45% | No change | 1,669,952 | $3.9M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +56.3% | 1,505,068 | $3.5M |
| Brightline Capital Management, LLC | 1.02% | Add +3.7% | 1,060,000 | $2.5M |
| Icon Advisers Inc. | 0.52% | Add +33.3% | 1,000,000 | $2.4M |
| Geode Capital Management, LLC | 0.00% | Add +2.3% | 841,828 | $2.0M |
| Vanguard Group Inc. | 0.00% | Reduce -29.8% | 755,643 | $1.8M |
| Morgan Stanley | 0.00% | Reduce -2.9% | 454,287 | $1.1M |
| State Street Corp. | 0.00% | Add +11.2% | 423,786 | $996K |
| Bank of America Corp. | 0.00% | Add +20.0% | 363,641 | $855K |
| Renaissance Technologies | 0.00% | Add +13.2% | 314,700 | $740K |
| Lakewood Capital Management, LP | 0.05% | No change | 281,279 | $661K |
| Northern Trust Corp. | 0.00% | Add +1.1% | 268,689 | $631K |
| Royal Bank of Canada | 0.00% | Reduce -3.8% | 227,821 | $536K |
| UBS Group AG | 0.00% | Add +4.9% | 199,804 | $470K |
| Alta Fundamental Advisers LLC | 0.18% | New | 152,974 | $359K |
| D. E. Shaw & Co. | 0.00% | Reduce -53.5% | 147,316 | $346K |
| Invesco Ltd. | 0.00% | Reduce -32.5% | 131,802 | $310K |
| Goldman Sachs Group Inc. | 0.00% | Add +7.8% | 125,993 | $296K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -0.4% | 117,669 | $277K |
| Voleon Capital Management LP | 0.00% | New | 82,074 | $193K |
| Bank of New York Mellon Corp | 0.00% | Add +0.0% | 81,402 | $191K |
| FMR LLC | 0.00% | Reduce -57.1% | 50,582 | $119K |
| Barclays PLC | 0.00% | Reduce -18.5% | 47,982 | $113K |
| Kohmann Bosshard Financial Services, LLC | 0.01% | No change | 44,605 | $105K |
| Nuveen, LLC | 0.00% | No change | 44,280 | $104K |
| T. Rowe Price Associates Inc. | 0.00% | No change | 40,483 | $96K |
| Mariner, LLC | 0.00% | New | 39,200 | $92K |
| Two Sigma Investments, LP | 0.00% | Reduce -73.6% | 35,714 | $84K |
| Rhumbline Advisers | 0.00% | Reduce -1.0% | 32,728 | $77K |
| New York State Common Retirement Fund | 0.00% | No change | 29,500 | $69K |
| Deutsche Bank AG | 0.00% | No change | 28,785 | $68K |
| Wells Fargo & Company | 0.00% | Add +16.8% | 28,279 | $66K |
| JB Capital Partners LP | 0.01% | No change | 27,001 | $63K |
| JPMorgan Chase & Co. | 0.00% | Reduce -92.8% | 26,323 | $62K |
| AQR Capital Management | 0.00% | New | 24,583 | $58K |
| BNP Paribas Financial Markets | 0.00% | Reduce -43.6% | 23,454 | $55K |
| PFG Investments, LLC | 0.00% | Add +64.3% | 23,004 | $54K |
| Cubist Systematic Strategies, LLC | 0.00% | New | 20,026 | $47K |
| Intech Investment Management LLC | 0.00% | Add +3.5% | 16,054 | $38K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -15.0% | 15,814 | $37K |
| Red Door Wealth Management, LLC | 0.00% | No change | 15,000 | $35K |
| Russell Investments Group, Ltd. | 0.00% | Add +2181.1% | 13,276 | $31K |
| Susquehanna International Group, LLP | 0.00% | Reduce -79.6% | 11,703 | $28K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 8,769 | $21K |
| EverSource Wealth Advisors, LLC | 0.00% | New | 5,090 | $12K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +1102.2% | 4,833 | $11K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 3,476 | $8K |
| Legal & General Group Plc | 0.00% | No change | 3,098 | $7K |
| Group One Trading LLC | 0.00% | Add +1018.2% | 3,075 | $7K |
| Sterling Capital Management LLC | 0.00% | Add +155.6% | 2,349 | $6K |
| California State Teachers Retirement System | 0.00% | Add +0.1% | 2,126 | $5K |
| Point72 Asia (Singapore) Pte. Ltd. | 0.00% | New | 1,793 | $4K |
| Cwm, LLC | 0.00% | New | 1,688 | $4K |
| McIlrath & Eck, LLC | 0.00% | No change | 1,444 | $3K |
| Amalgamated Bank | 0.00% | No change | 1,163 | $3K |
| Steward Partners Investment Advisory, LLC | 0.00% | No change | 1,000 | $2K |
| Citigroup Inc. | 0.00% | Reduce -96.2% | 519 | $1K |
| Arax Advisory Partners | 0.00% | New | 399 | $938 |
| SWAN Capital LLC | 0.00% | No change | 250 | $588 |
| Nisa Investment Advisors, LLC | 0.00% | Add +2975.0% | 246 | $578 |
| Osaic Holdings, Inc. | 0.00% | No change | 237 | $569 |
| Stephens Consulting, LLC | 0.00% | No change | 231 | $543 |
| Bare Financial Services, Inc | 0.00% | New | 209 | $491 |
| MAI Capital Management | 0.00% | Reduce -37.0% | 170 | $400 |
| Rockefeller Capital Management L.P. | 0.00% | New | 160 | $377 |
| Fifth Third Bancorp | 0.00% | New | 70 | $165 |
| Allworth Financial LP | 0.00% | Add +171.4% | 19 | $45 |
| IFP Advisors, Inc | 0.00% | New | 14 | $33 |
| Essential Partners LLC | 0.00% | New | 8 | $19 |
| SBI Securities Co., Ltd. | 0.00% | No change | 4 | $9 |
| Sunbelt Securities, Inc. | 0.00% | New | 3 | $7 |
"% of holder's portfolio" is TSEOQ's weight in each manager's 13F, not the share of Trinseo PLC the manager owns.