Institutional Ownership
Trinseo PLC
CUSIP G9059U107SHSQ1 2026
13D / 13G Filings
10
Schedule 13D/13G on record
Beneficial Filers
6
Distinct reporting persons
Largest Stake
21.8%
Max % of class reported
Institutional Holders
14
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
10 filings · latest Feb 17, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Feb 17, 2026 | Castleknight Master Fund LP | 13G/A | 1.4% | — | SEC |
| 2 | Feb 12, 2026 | Charles Schwab Investment Management Inc | 13G | 5.8% | 2.09M | SEC |
| 3 | Aug 14, 2025 | Castleknight Master Fund LP | 13G/A | 7.8% | — | SEC |
| 4 | Jul 17, 2025 | Blackrock, Inc. | 13G | 6.3% | 2.26M | SEC |
| 5 | Dec 17, 2024 | Castleknight Master Fund LP | 13G | 6.7% | 2.36M | SEC |
| 6 | Nov 14, 2024 | Nut Tree Capital Management, LP | 13G | 9.9% | 3.50M | SEC |
| 7 | Feb 9, 2023 | Fmr LLC | 13G/A | 1.3% | — | SEC |
| 8 | Aug 12, 2022 | M&G Investment Management Ltd | 13D | 21.8% | 7.63M | SEC |
| 9 | May 10, 2022 | M&G Investment Management Ltd | 13D | 21.1% | 7.63M | SEC |
| 10 | Feb 9, 2022 | Fmr LLC | 13G | 6.5% | — | SEC |
Top Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Kohmann Bosshard Financial Services, LLC | 44.6K | $4.7K |
| 2 | Nuveen, LLC | 44.3K | $4.6K |
| 3 | Eversource Wealth Advisors, LLC | 5.4K | $570 |
| 4 | Barclays PLC | 4.8K | $505 |
| 5 | Gamma Investing LLC | 2.1K | $226 |
| 6 | Rhumbline Advisers | 1.7K | $173 |
| 7 | Mcilrath & Eck, LLC | 1.4K | $152 |
| 8 | Swan Capital LLC | 250 | $26 |
| 9 | Rockefeller Capital Management L.P. | 160 | $17 |
| 10 | Sunbelt Securities, Inc. | 64 | $7 |