TSEOQOTCPlastic Materials, Synth Resins & Nonvulcan ElastomersFiscal year ends December 31
Trinseo PLC
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 6, 2026
$0.00+0.00 (+14.29%)
Close on Oct 19, 2026
- Market cap
- $146.40K
- P/E (TTM)
- –
- Dividend yield
- 500.00%
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
1.3%
0M of 37M shares
Institutional holders
6
0 new, 6 sold out
Net institutional buying
0M
In Q2 2026
Insider trades, 12 months
0 buys · 0 sales
Open-market trades only
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Nut Tree Capital Management GP, LLC | 3,027,280 | 8.30% | 13G (passive) amendment | Mar 31, 2026 |
| CastleKnight Management GP LLC | 2,766,226 | 7.80% | 13G (passive) amendment | Jun 30, 2025 |
| BlackRock, Inc. | 2,255,125 | 6.30% | 13G (passive) | Jun 30, 2025 |
| Charles Schwab Investment Management Inc | 2,091,125 | 5.80% | 13G (passive) | Dec 31, 2025 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of TSEOQ | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| GAMMA Investing LLC | 412,655 | 1.13% | $660 | +410,507 | 0.00% |
| Kohmann Bosshard Financial Services, LLC | 44,605 | 0.12% | $71 | – | 0.00% |
| EverSource Wealth Advisors, LLC | 5,375 | 0.01% | $9 | −55 | 0.00% |
| Essential Partners LLC | 30 | 0.00% | $0 | −36 | 0.00% |
| Farther Finance Advisors, LLC | 15 | 0.00% | $0 | – | 0.00% |
| Rothschild Investment LLC | 7 | 0.00% | $0 | – | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 6 | 0M | 1.3% | 0 / 1 | 2 / 6 | 0M | 0M |
| Q1 2026 | 14 | 0M | 0.3% | 2 / 5 | 2 / 58 | 0M | 20M |
| Q4 2025 | 72 | 21M | 58.1% | 13 / 15 | 23 / 14 | 2M | 8M |
| Q3 2025 | 75 | 27M | 73.5% | 15 / 22 | 17 / 20 | 1M | 3M |
| Q2 2025 | 80 | 28M | 76.4% | 21 / 21 | 21 / 26 | 6M | 4M |
| Q1 2025 | 85 | 25M | 68.9% | 9 / 35 | 23 / 19 | 2M | 2M |
| Q4 2024 | 95 | 25M | 68.3% | 32 / 25 | 26 / 7 | 4M | 2M |
| Q3 2024 | 71 | 23M | 63.8% | 10 / 23 | 24 / 36 | 5M | 6M |
| Q2 2024 | 98 | 26M | 70.2% | 23 / 27 | 35 / 34 | 6M | 9M |
| Q1 2024 | 109 | 28M | 77.9% | 15 / 34 | 49 / 33 | 12M | 6M |
| Q4 2023 | 128 | 30M | 81.6% | 23 / 48 | 45 / 39 | 4M | 4M |
| Q3 2023 | 144 | 30M | 81.2% | 32 / 44 | 48 / 33 | 7M | 10M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of TSEOQ | Value | % of fund | As of |
|---|---|---|---|---|---|
| ICON Natural Resources and Infrastructure Fund | 383,800 | 1.05% | $0 | 0.00% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 370,666 | 1.01% | $593 | 0.00% | Jun 30, 2026 |
| Nuveen Small Cap Blend Index Fund | 44,280 | 0.12% | $71 | 0.00% | Jul 31, 2026 |
| Bridge Builder Small/Mid Cap Value Fund | 15,757 | 0.04% | $25 | 0.00% | Jun 30, 2026 |
| Vanguard Russell 3000 Index Fund | 4,098 | 0.01% | $41 | 0.00% | May 31, 2026 |
| Vanguard Russell 2000 Index Fund | 464 | 0.00% | $5 | 0.00% | May 31, 2026 |
| Avantis Total Equity Markets ETF | 178 | 0.00% | $2 | 0.00% | May 31, 2026 |
| Vanguard Russell 2000 Value Index Fund | 120 | 0.00% | $1 | 0.00% | May 31, 2026 |
| Global X Russell 2000 ETF | 22 | 0.00% | $0 | 0.00% | Jul 31, 2026 |
| Small Cap Index Fund | 0 | – | $0 | 0.00% | Jun 30, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Frank A. Bozich | CEO AND PRESIDENT, Director | 664,689 | 1.82% | Mar 3, 2026 |
| Roger Greene | VP, GLOBAL CONTROLLER & PAO | 45,101 | 0.12% | Mar 3, 2026 |
| Kessel Bregje van | SVP, Corporate Finance & IR | 98,296 | 0.27% | Mar 3, 2026 |
| Rainer Schewe | SVP, SUPPLY CHAIN & MFG SVCS | 103,415 | 0.28% | Mar 3, 2026 |
| Francesca Reverberi | SVP, EM and Polymer Solutions | 161,250 | 0.44% | Mar 3, 2026 |
| Paula M. Cooney | SVP, CHRO | 118,318 | 0.32% | Mar 3, 2026 |
| Han Hendriks | SVP, CHIEF TECHNOLOGY OFFICER | 73,362 | 0.20% | Mar 3, 2026 |
| David Phillip Stasse | EVP AND CFO | 254,788 | 0.70% | Mar 3, 2026 |
| Angelo N. Chaclas | SVP, CLO, CCO & CORP. SEC. | 274,798 | 0.75% | Mar 3, 2026 |
| Arthas Bing Yang | SVP, Latex Binders | 49,457 | 0.14% | Mar 3, 2026 |
| Johanna Frisch | VP AND TREASURER | 15,898 | 0.04% | Oct 2, 2025 |
| Jeanmarie F. Desmond | Director | 46,552 | 0.13% | May 14, 2026 |
| Matthew Farrell | Director | 207,741 | 0.57% | May 14, 2026 |
| Joseph Alvarado | Director | 52,187 | 0.14% | May 14, 2026 |
| KLynne Johnson | Director | 48,429 | 0.13% | May 14, 2026 |
| Sandra Beach Lin | Director | 44,776 | 0.12% | May 14, 2026 |
| Jeffrey J. Cote | Director | 216,202 | 0.59% | May 14, 2026 |
| Henri Steinmetz | Director | 53,453 | 0.15% | May 14, 2026 |
| Victoria Brifo | Director | 40,741 | 0.11% | May 14, 2026 |
| Jill Kathleen Frizzley | Director | – | – | Jan 20, 2026 |
| Carol Flaton | Director | – | – | Jan 20, 2026 |
| Leener Pierre-Marie De | Director | 36,174 | 0.10% | Jun 24, 2025 |
| Mark E. Tomkins | Director | 36,619 | 0.10% | Jun 24, 2025 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Henri Steinmetz Director | May 12, 2026 | Other | −42,484 | – | – | 53,453 |
| Jeanmarie F. Desmond Director | May 12, 2026 | Other | −42,484 | – | – | 46,552 |
| Jeffrey J. Cote Director | May 12, 2026 | Other | −42,484 | – | – | 45,699 |
| Joseph Alvarado Director | May 12, 2026 | Other | −42,484 | – | – | 52,187 |
| Sandra Beach Lin Director | May 12, 2026 | Other | −42,484 | – | – | 44,776 |
| Matthew Farrell Director | May 12, 2026 | Other | −42,484 | – | – | 207,741 |
| Victoria Brifo Director | May 12, 2026 | Other | −42,484 | – | – | 40,741 |
| KLynne Johnson Director | May 12, 2026 | Other | −42,484 | – | – | 48,429 |
| Kessel Bregje van SVP, Corporate Finance & IR | Feb 27, 2026 | Tax withholding | −6,064 | $0.23 | $1.39K | 98,296 |
| Frank A. Bozich CEO AND PRESIDENT, Director | Feb 27, 2026 | Tax withholding | −23,680 | $0.23 | $5.45K | 664,689 |
| David Phillip Stasse EVP AND CFO | Feb 27, 2026 | Tax withholding | −10,366 | $0.23 | $2.38K | 254,788 |
| Angelo N. Chaclas SVP, CLO, CCO & CORP. SEC. | Feb 27, 2026 | Tax withholding | −7,607 | $0.23 | $1.75K | 274,798 |
| Paula M. Cooney SVP, CHRO | Feb 27, 2026 | Tax withholding | −7,670 | $0.23 | $1.76K | 118,318 |
| Roger Greene VP, GLOBAL CONTROLLER & PAO | Feb 27, 2026 | Tax withholding | −2,517 | $0.23 | $579 | 45,101 |
| Rainer Schewe SVP, SUPPLY CHAIN & MFG SVCS | Feb 27, 2026 | Tax withholding | −4,028 | $0.23 | $926 | 103,415 |
| Francesca Reverberi SVP, EM and Polymer Solutions | Feb 27, 2026 | Tax withholding | −1,385 | $0.23 | $319 | 161,250 |
| Arthas Bing Yang SVP, Latex Binders | Feb 27, 2026 | Tax withholding | −2,548 | $0.23 | $586 | 49,457 |
| Han Hendriks SVP, CHIEF TECHNOLOGY OFFICER | Feb 27, 2026 | Tax withholding | −7,707 | $0.23 | $1.77K | 73,362 |
| Frank A. Bozich CEO AND PRESIDENT, Director | Feb 22, 2026 | Tax withholding | −32,602 | $0.33 | $10.76K | 688,369 |
| David Phillip Stasse EVP AND CFO | Feb 22, 2026 | Tax withholding | −9,671 | $0.33 | $3.19K | 265,154 |
| Rainer Schewe SVP, SUPPLY CHAIN & MFG SVCS | Feb 22, 2026 | Tax withholding | −1,206 | $0.33 | $398 | 107,443 |
| Angelo N. Chaclas SVP, CLO, CCO & CORP. SEC. | Feb 22, 2026 | Tax withholding | −7,098 | $0.33 | $2.34K | 282,405 |
| Han Hendriks SVP, CHIEF TECHNOLOGY OFFICER | Feb 22, 2026 | Tax withholding | −2,291 | $0.33 | $756 | 81,069 |
| Francesca Reverberi SVP, EM and Polymer Solutions | Feb 22, 2026 | Tax withholding | −333 | $0.33 | $110 | 162,635 |
| Kessel Bregje van SVP, Corporate Finance & IR | Feb 22, 2026 | Tax withholding | −1,335 | $0.33 | $441 | 104,360 |
| Paula M. Cooney SVP, CHRO | Feb 22, 2026 | Tax withholding | −2,684 | $0.33 | $886 | 125,988 |
| Arthas Bing Yang SVP, Latex Binders | Feb 22, 2026 | Tax withholding | −547 | $0.33 | $181 | 52,005 |
| David Phillip Stasse EVP AND CFO | Feb 21, 2026 | Tax withholding | −5,028 | $0.33 | $1.66K | 274,825 |
| Rainer Schewe SVP, SUPPLY CHAIN & MFG SVCS | Feb 21, 2026 | Tax withholding | −3,907 | $0.33 | $1.29K | 108,649 |
| Angelo N. Chaclas SVP, CLO, CCO & CORP. SEC. | Feb 21, 2026 | Tax withholding | −3,690 | $0.33 | $1.22K | 289,503 |
| Han Hendriks SVP, CHIEF TECHNOLOGY OFFICER | Feb 21, 2026 | Tax withholding | −6,331 | $0.33 | $2.09K | 83,360 |
| Francesca Reverberi SVP, EM and Polymer Solutions | Feb 21, 2026 | Tax withholding | −1,163 | $0.33 | $384 | 162,968 |
| Kessel Bregje van SVP, Corporate Finance & IR | Feb 21, 2026 | Tax withholding | −5,963 | $0.33 | $1.97K | 105,695 |
| Paula M. Cooney SVP, CHRO | Feb 21, 2026 | Tax withholding | −7,440 | $0.33 | $2.46K | 128,672 |
| Arthas Bing Yang SVP, Latex Binders | Feb 21, 2026 | Tax withholding | −1,898 | $0.33 | $626 | 52,552 |
| Roger Greene VP, GLOBAL CONTROLLER & PAO | Feb 21, 2026 | Tax withholding | −2,238 | $0.33 | $739 | 47,618 |
| Han Hendriks SVP, CHIEF TECHNOLOGY OFFICER | Oct 3, 2025 | Tax withholding | −2,067 | $2.33 | $4.82K | 89,691 |
| Johanna Frisch VP AND TREASURER | Sep 30, 2025 | Tax withholding | −2,194 | $2.35 | $5.16K | 15,898 |
| Roger Greene VP, GLOBAL CONTROLLER & PAO | Sep 25, 2025 | Tax withholding | −1,617 | $2.57 | $4.16K | 49,856 |
| Matthew Farrell Director | Aug 14, 2025 | Buy | +48,609 | $2.43 | $118.12K | 250,225 |
| Matthew Farrell Director | Aug 13, 2025 | Buy | +26,391 | $2.45 | $64.66K | 201,616 |
| Matthew Farrell Director | Aug 12, 2025 | Buy | +25,000 | $2.29 | $57.25K | 175,225 |
| Matthew Farrell Director | Jun 25, 2025 | Award | +42,484 | – | – | 150,225 |
| Jeanmarie F. Desmond Director | Jun 25, 2025 | Award | +42,484 | – | – | 89,036 |
| Joseph Alvarado Director | Jun 25, 2025 | Award | +42,484 | – | – | 94,671 |
| Henri Steinmetz Director | Jun 25, 2025 | Award | +42,484 | – | – | 95,937 |
| Sandra Beach Lin Director | Jun 25, 2025 | Award | +42,484 | – | – | 87,260 |
| KLynne Johnson Director | Jun 25, 2025 | Award | +42,484 | – | – | 90,913 |
| Jeffrey J. Cote Director | Jun 25, 2025 | Award | +42,484 | – | – | 88,183 |
| Victoria Brifo Director | Jun 25, 2025 | Award | +42,484 | – | – | 83,225 |
| Jeffrey J. Cote Director | Jun 21, 2025 | Tax withholding | −10,310 | $3.73 | $38.46K | 45,699 |
| Victoria Brifo Director | Jun 21, 2025 | Tax withholding | −9,576 | $3.73 | $35.72K | 40,741 |
| Henri Steinmetz Director | Jun 21, 2025 | Tax withholding | −20,001 | $3.73 | $74.60K | 53,453 |
| Matthew Farrell Director | Jun 21, 2025 | Tax withholding | −9,576 | $3.73 | $35.72K | 107,741 |
| Mark E. Tomkins Director | Jun 21, 2025 | Tax withholding | −10,105 | $3.73 | $37.69K | 36,619 |
| Jeffrey J. Cote Director | Jun 21, 2025 | Tax withholding | −10,310 | $3.73 | $38.46K | 45,699 |
| Sandra Beach Lin Director | Jun 21, 2025 | Tax withholding | −10,310 | $3.73 | $38.46K | 44,776 |
| Jeanmarie F. Desmond Director | Jun 21, 2025 | Tax withholding | −10,343 | $3.73 | $38.58K | 46,552 |
| Joseph Alvarado Director | Jun 21, 2025 | Tax withholding | −10,327 | $3.73 | $38.52K | 52,187 |
| KLynne Johnson Director | Jun 21, 2025 | Tax withholding | −10,474 | $3.73 | $39.07K | 48,429 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Tomkins Mark Affiliate | Aug 13, 2024 | 11,142 | $27.63K | Aug 13, 2024 | Open Market Purchase |