TSE

Trinseo PLC$0.11+0.00 (—)

Prev Close—·MCap$4.0M·P/E—·Vol—·Yield0.18%

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Buys (12M)

$240.0K

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Sells (12M)

$316.8K

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Net Activity

Net Seller

$76.7K

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Active Insiders

last 12 mo

Over the past 12 months, insider activity at Trinseo PLC (TSE) has been mixed between buying and selling, with 1 insider purchase totaling $240.0K and 10 insider sales totaling $316.8K. The most recent insider transaction was by Hendriks Han (SVP, CHIEF TECHNOLOGY OFFICER), who sold $4.8K worth of shares on Oct 3, 2025. Trinseo PLC operates in the Basic Materials sector, within the Chemicals - Specialty industry, with a market cap of $4.0M.

TSE Insider Trading Activity

Date	Insider	Role	Type	Shares	Avg Price	Value
Oct 3, 2025	Hendriks Han	SVP, CHIEF TECHNOLOGY OFFICER	Sell	2,067	$2.33	$4.8K
Sep 30, 2025	Frisch Johanna	VP AND TREASURER	Sell	2,194	$2.35	$5.2K
Sep 25, 2025	Greene Roger	VP, GLOBAL CONTROLLER & PAO	Sell	1,617	$2.57	$4.2K
Aug 12, 2025	FARRELL MATTHEW	Director	Buy	100,000	$2.40	$240.0K
Jun 21, 2025	ALVARADO JOSEPH	Director	Sell	10,327	$3.73	$38.5K
Jun 21, 2025	Desmond Jeanmarie F.	Director	Sell	10,343	$3.73	$38.6K
Jun 21, 2025	FARRELL MATTHEW	Director	Sell	9,576	$3.73	$35.7K
Jun 21, 2025	Johnson KLynne	Director	Sell	10,474	$3.73	$39.1K
Jun 21, 2025	LIN SANDRA BEACH	Director	Sell	10,310	$3.73	$38.5K
Jun 21, 2025	STEINMETZ HENRI	Director	Sell	20,001	$3.73	$74.6K
Jun 21, 2025	TOMKINS MARK E	Director	Sell	10,105	$3.73	$37.7K
Mar 12, 2025	Frisch Johanna	VP AND TREASURER	Buy	3,800	$4.13	$15.7K
Feb 22, 2025	BOZICH FRANK A	CEO AND PRESIDENT	Sell	18,795	$5.52	$103.7K
Feb 21, 2025	Chaclas Angelo N.	SVP, CLO, CCO & CORP. SEC.	Sell	3,690	$5.52	$20.4K
Feb 21, 2025	Cooney Paula M.	SVP, CHRO	Sell	7,440	$5.52	$41.1K
Feb 21, 2025	Frisch Johanna	VP AND TREASURER	Sell	767	$5.52	$4.2K
Feb 21, 2025	Greene Roger	VP, GLOBAL CONTROLLER & PAO	Sell	2,238	$5.52	$12.4K
Feb 21, 2025	Hendriks Han	SVP, CHIEF TECHNOLOGY OFFICER	Sell	6,331	$5.52	$34.9K
Feb 21, 2025	Reverberi Francesca	SVP, EM and Polymer Solutions	Sell	1,163	$5.52	$6.4K
Feb 21, 2025	Schewe Rainer	SVP, SUPPLY CHAIN & MFG SVCS	Sell	6,662	$5.52	$36.8K
Feb 21, 2025	Stasse David Phillip	EVP AND CFO	Sell	6,558	$5.52	$36.2K
Feb 21, 2025	van Kessel Bregje	SVP, Corporate Finance & IR	Sell	903	$5.52	$5.0K
Feb 21, 2025	Yang Arthas Bing	SVP, Latex Binders	Sell	2,844	$5.52	$15.7K

TSE Insider Buying Activity

The following table shows recent insider purchases of Trinseo PLC (TSE) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Aug 12, 2025	FARRELL MATTHEW	Director	Buy	100,000	$2.40	$240.0K	0
Mar 12, 2025	Frisch Johanna	VP AND TREASURER	Buy	3,800	$4.13	$15.7K	0

TSE Insider Selling Activity

The following table shows recent insider sales of Trinseo PLC (TSE) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value
Oct 3, 2025	Hendriks Han	SVP, CHIEF TECHNOLOGY OFFICER	Sell	2,067	$2.33	$4.8K
Sep 30, 2025	Frisch Johanna	VP AND TREASURER	Sell	2,194	$2.35	$5.2K
Sep 25, 2025	Greene Roger	VP, GLOBAL CONTROLLER & PAO	Sell	1,617	$2.57	$4.2K
Jun 21, 2025	ALVARADO JOSEPH	Director	Sell	10,327	$3.73	$38.5K
Jun 21, 2025	Desmond Jeanmarie F.	Director	Sell	10,343	$3.73	$38.6K
Jun 21, 2025	FARRELL MATTHEW	Director	Sell	9,576	$3.73	$35.7K
Jun 21, 2025	Johnson KLynne	Director	Sell	10,474	$3.73	$39.1K
Jun 21, 2025	LIN SANDRA BEACH	Director	Sell	10,310	$3.73	$38.5K
Jun 21, 2025	STEINMETZ HENRI	Director	Sell	20,001	$3.73	$74.6K
Jun 21, 2025	TOMKINS MARK E	Director	Sell	10,105	$3.73	$37.7K
Feb 22, 2025	BOZICH FRANK A	CEO AND PRESIDENT	Sell	18,795	$5.52	$103.7K
Feb 21, 2025	Chaclas Angelo N.	SVP, CLO, CCO & CORP. SEC.	Sell	3,690	$5.52	$20.4K
Feb 21, 2025	Cooney Paula M.	SVP, CHRO	Sell	7,440	$5.52	$41.1K
Feb 21, 2025	Frisch Johanna	VP AND TREASURER	Sell	767	$5.52	$4.2K
Feb 21, 2025	Greene Roger	VP, GLOBAL CONTROLLER & PAO	Sell	2,238	$5.52	$12.4K
Feb 21, 2025	Hendriks Han	SVP, CHIEF TECHNOLOGY OFFICER	Sell	6,331	$5.52	$34.9K
Feb 21, 2025	Reverberi Francesca	SVP, EM and Polymer Solutions	Sell	1,163	$5.52	$6.4K
Feb 21, 2025	Schewe Rainer	SVP, SUPPLY CHAIN & MFG SVCS	Sell	6,662	$5.52	$36.8K
Feb 21, 2025	Stasse David Phillip	EVP AND CFO	Sell	6,558	$5.52	$36.2K
Feb 21, 2025	van Kessel Bregje	SVP, Corporate Finance & IR	Sell	903	$5.52	$5.0K
Feb 21, 2025	Yang Arthas Bing	SVP, Latex Binders	Sell	2,844	$5.52	$15.7K