TSEOQ · Trinseo PLC
The latest filing no longer states the doubt (first flagged Apr 30, 2026).
View the 10-Q filed Aug 6, 2026Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 3, 4 and 5. Form 4 must be filed within two business days of the trade.
| Date | Insider | Role | Type | Security | Shares |
|---|---|---|---|---|---|
| 2026-05-12 | COTE JEFFREY J |
Director, CEO and President |
Other↓
Filing footnotes — Ordinary Shares (Direct)
Reflects a voluntary forfeiture by the Reporting Person of restricted stock units ("RSUs") that were previously granted on June 25, 2025. At the time of forfeiture, the RSU award was not vested or settled, in full or in part. |
Ordinary Shares
|
42,484 |
| 2026-05-12 | Desmond Jeanmarie F. |
Director |
Other↓
Filing footnotes — Ordinary Shares (Direct)
Reflects a voluntary forfeiture by the Reporting Person of restricted stock units ("RSUs") that were previously granted on June 25, 2025. At the time of forfeiture, the RSU award was not vested or settled, in full or in part. |
Ordinary Shares
|
42,484 |
| 2026-05-12 | LIN SANDRA BEACH |
Director |
Other↓
Filing footnotes — Ordinary Shares (Direct)
Reflects a voluntary forfeiture by the Reporting Person of restricted stock units ("RSUs") that were previously granted on June 25, 2025. At the time of forfeiture, the RSU award was not vested or settled, in full or in part. |
Ordinary Shares
|
42,484 |
| 2026-05-12 | Johnson KLynne |
Director |
Other↓
Filing footnotes — Ordinary Shares (Direct)
Reflects a voluntary forfeiture by the Reporting Person of restricted stock units ("RSUs") that were previously granted on June 25, 2025. At the time of forfeiture, the RSU award was not vested or settled, in full or in part. |
Ordinary Shares
|
42,484 |
| 2026-05-12 | FARRELL MATTHEW |
Director |
Other↓
Filing footnotes — Ordinary Shares (Direct)
Reflects a voluntary forfeiture by the Reporting Person of restricted stock units ("RSUs") that were previously granted on June 25, 2025. At the time of forfeiture, the RSU award was not vested or settled, in full or in part. |
Ordinary Shares
|
42,484 |
| 2026-05-12 | STEINMETZ HENRI |
Director |
Other↓
Filing footnotes — Ordinary Shares (Direct)
Reflects a voluntary forfeiture by the Reporting Person of restricted stock units ("RSUs") that were previously granted on June 25, 2025. At the time of forfeiture, the RSU award was not vested or settled, in full or in part |
Ordinary Shares
|
42,484 |
| 2026-05-12 | ALVARADO JOSEPH |
Director |
Other↓
Filing footnotes — Ordinary Shares (Direct)
Reflects a voluntary forfeiture by the Reporting Person of restricted stock units ("RSUs") that were previously granted on June 25, 2025. At the time of forfeiture, the RSU award was not vested or settled, in full or in part. |
Ordinary Shares
|
42,484 |
| 2026-05-12 | Brifo Victoria |
Exec VP, Chief HR Officer |
Other↓
Filing footnotes — Ordinary Shares (Direct)
Reflects a voluntary forfeiture by the Reporting Person of restricted stock units ("RSUs") that were previously granted on June 25, 2025. At the time of forfeiture, the RSU award was not vested or settled, in full or in part. |
Ordinary Shares
|
42,484 |
| 2026-02-27 | Chaclas Angelo N. |
SVP, CLO, CCO & CORP. SEC. |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
7,607 |
| 2026-02-27 | van Kessel Bregje |
SVP, Corporate Finance & IR |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
6,064 |
| 2026-02-27 | Greene Roger |
VP, GLOBAL CONTROLLER & PAO |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
2,517 |
| 2026-02-27 | Hendriks Han |
SVP, CHIEF TECHNOLOGY OFFICER |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
7,707 |
| 2026-02-27 | Cooney Paula M. |
SVP, CHRO |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
7,670 |
| 2026-02-27 | Stasse David Phillip |
EVP AND CFO |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
10,366 |
| 2026-02-27 | Schewe Rainer |
SVP, SUPPLY CHAIN & MFG SVCS |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
4,028 |
| 2026-02-27 | BOZICH FRANK A |
Director, CEO AND PRESIDENT |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
23,680 |
| 2026-02-27 | Yang Arthas Bing |
SVP, Latex Binders |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
2,548 |
| 2026-02-27 | Reverberi Francesca |
SVP, EM and Polymer Solutions |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
1,385 |
| 2026-02-22 | van Kessel Bregje |
SVP, Corporate Finance & IR |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
1,335 |
| 2026-02-22 | Hendriks Han |
SVP, CHIEF TECHNOLOGY OFFICER |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
2,291 |
| 2026-02-22 | Stasse David Phillip |
EVP AND CFO |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
9,671 |
| 2026-02-22 | BOZICH FRANK A |
Director, CEO AND PRESIDENT |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
32,602 |
| 2026-02-22 | Yang Arthas Bing |
SVP, Latex Binders |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
547 |
| 2026-02-22 | Schewe Rainer |
SVP, SUPPLY CHAIN & MFG SVCS |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
1,206 |
| 2026-02-22 | Chaclas Angelo N. |
SVP, CLO, CCO & CORP. SEC. |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
7,098 |
| 2026-02-22 | Cooney Paula M. |
SVP, CHRO |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
2,684 |
| 2026-02-22 | Reverberi Francesca |
SVP, EM and Polymer Solutions |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
333 |
| 2026-02-21 | Stasse David Phillip |
EVP AND CFO |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
5,028 |
| 2026-02-21 | Chaclas Angelo N. |
SVP, CLO, CCO & CORP. SEC. |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
3,690 |
| 2026-02-21 | Hendriks Han |
SVP, CHIEF TECHNOLOGY OFFICER |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
6,331 |
| 2026-02-21 | Schewe Rainer |
SVP, SUPPLY CHAIN & MFG SVCS |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
3,907 |
| 2026-02-21 | van Kessel Bregje |
SVP, Corporate Finance & IR |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
5,963 |
| 2026-02-21 | Yang Arthas Bing |
SVP, Latex Binders |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
1,898 |
| 2026-02-21 | Cooney Paula M. |
SVP, CHRO |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
7,440 |
| 2026-02-21 | Reverberi Francesca |
SVP, EM and Polymer Solutions |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
1,163 |
| 2026-02-21 | Greene Roger |
VP, GLOBAL CONTROLLER & PAO |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
2,238 |
| 2026-01-16 | Frizzley Jill Kathleen |
Director |
Other↑
|
No Securities Owned
|
0 |
| 2026-01-16 | Flaton Carol |
Director |
Other↑
|
No Securities Owned
|
0 |
| 2025-10-03 | Hendriks Han |
SVP, CHIEF TECHNOLOGY OFFICER |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
2,067 |
| 2025-09-30 | Frisch Johanna |
VP AND TREASURER |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of previously granted restricted stock units. |
Ordinary Shares
|
2,194 |
| 2025-09-25 | Greene Roger |
VP, GLOBAL CONTROLLER & PAO |
Tax↓
Filing footnotes — Ordinary Shares (Direct)
Shares withheld by the Company to pay taxes due following the vesting of restricted stock units. |
Ordinary Shares
|
1,617 |
| 2025-08-14 | FARRELL MATTHEW |
Director |
Buy↑
Filing footnotes — Ordinary Shares (Direct)
Price reflects the weighted average purchase price for the purchase transaction made on the date reported above. Purchase prices ranged from $2.38 to $2.46. The reporting person will provide, upon request by the Staff, the Company, or a security holder of the Company, full information regarding the number of shares purchased at each separate price |
Ordinary Shares
|
48,609 |
| 2025-08-13 | FARRELL MATTHEW |
Director |
Buy↑
Filing footnotes — Ordinary Shares (Direct)
Price reflects the weighted average purchase price for the purchase transaction made on the date reported above. Purchase prices ranged from $2.36 to $2.50. The reporting person will provide, upon request by the Staff, the Company, or a security holder of the Company, full information regarding the number of shares purchased at each separate price. |
Ordinary Shares
|
26,391 |
| 2025-08-12 | FARRELL MATTHEW |
Director |
Buy↑
Filing footnotes — Ordinary Shares (Direct)
Price reflects the weighted average purchase price for the purchase transaction made on the date reported above. Purchase prices ranged from $2.26 to $2.32. The reporting person will provide, upon request by the Staff, the Company, or a security holder of the Company, full information regarding the number of shares purchased at each separate price. |
Ordinary Shares
|
25,000 |
| 2025-06-25 | Brifo Victoria |
Exec VP, Chief HR Officer |
Award↑
Filing footnotes — Ordinary Shares (Direct)
Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date. |
Ordinary Shares
|
42,484 |
| 2025-06-25 | LIN SANDRA BEACH |
Director |
Award↑
Filing footnotes — Ordinary Shares (Direct)
Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date. |
Ordinary Shares
|
42,484 |
| 2025-06-25 | Desmond Jeanmarie F. |
Director |
Award↑
Filing footnotes — Ordinary Shares (Direct)
Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date. |
Ordinary Shares
|
42,484 |
| 2025-06-25 | Johnson KLynne |
Director |
Award↑
Filing footnotes — Ordinary Shares (Direct)
Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date. |
Ordinary Shares
|
42,484 |
| 2025-06-25 | STEINMETZ HENRI |
Director |
Award↑
Filing footnotes — Ordinary Shares (Direct)
Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date. |
Ordinary Shares
|
42,484 |
| 2025-06-25 | FARRELL MATTHEW |
Director |
Award↑
Filing footnotes — Ordinary Shares (Direct)
Represents ordinary shares issuable pursuant to a restricted stock unit award that will vest in full on the first anniversary of the grant date. |
Ordinary Shares
|
42,484 |