TSEOQ · Trinseo PLC · Insider Trading

$0.01 At close · Sep 23

Market Cap

$475,278

36.56M

Volume · Sep 23 150K Avg daily vol (19 sessions) 19.88K

Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 4 and 5. Form 3 supplies initial ownership rather than a trade; Form 4 must be filed within two business days of the trade.

Query insider transactions through the insider trading API or MCP →

Date	Insider	Role	Type	Security	Shares	Price	Value	After
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	—	—	45,699
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	—	—	46,552
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	—	—	44,776
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	—	—	48,429
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	—	—	207,741
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	—	—	53,453
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	—	—	52,187
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	—	—	40,741
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	$0.23	$1,750	274,798
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	$0.23	$1,395	98,296
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	$0.23	$579	45,101
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	$0.23	$1,773	73,362
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	$0.23	$1,764	118,318
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	$0.23	$2,384	254,788
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	$0.23	$926	103,415
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	$0.23	$5,446	664,689
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	$0.23	$586	49,457
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	$0.23	$319	161,250
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	$0.33	$437	104,360
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	$0.33	$751	81,069
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	$0.33	$3,168	265,154
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	$0.33	$10,680	688,369
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	$0.33	$179	52,005
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	$0.33	$395	107,443
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	$0.33	$2,325	282,405
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	$0.33	$879	125,988
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	$0.33	$109	162,635
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	$0.33	$1,647	274,825
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	$0.33	$1,209	289,503
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	$0.33	$2,074	83,360
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	$0.33	$1,280	108,649
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	$0.33	$1,953	105,695
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	$0.33	$622	52,552
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	$0.33	$2,437	128,672
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	$0.33	$381	162,968
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	$0.33	$733	47,618
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	$2.33	$4,816	89,691
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	$2.35	$5,156	15,898
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	$2.57	$4,156	49,856
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	$2.43	$118,120	250,225
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	$2.45	$64,658	201,616
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	$2.29	$57,250	175,225
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	—	—	83,225
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	—	—	87,260
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	—	—	89,036
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	—	—	90,913
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	—	—	95,937
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	—	—	150,225
2025-06-25	COTE JEFFREY J	Director, CEO and President	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	—	—	88,183
2025-06-25	ALVARADO JOSEPH	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	—	—	94,671

Legend Buy — open-market purchase Sell — open-market sale ↑ Shares acquired ↓ Shares disposed (gift, conversion, tax…)

Showing 1–50 of 545 transactions

Key facts CIK 1519061 Visit website