Trinseo Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NYSE:TSE Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Role	Shares	Max Price
14 Aug 25	BuyUS$240,028	Matthew Farrell	Individual		100,000	US$2.45
14 Mar 25	BuyUS$15,708	Johanna Frisch	Individual		3,800	US$4.28

Insider Trading Volume

Insider Buying: TSE insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of TSE?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	1,400,129	3.89%
Hedge Funds	6,266,226	17.4%
General Public	6,737,862	18.7%
Institutions	21,548,358	59.9%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 73.97% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
21.2%	M&G Investment Management Limited	7,625,044	US$18.3m	0%	0.03%
9.74%	Nut Tree Capital Management, LP	3,500,000	US$8.4m	0%	2.3%
7.69%	Castleknight Management LP	2,766,226	US$6.6m	0%	0.4%
6.27%	BlackRock, Inc.	2,255,133	US$5.4m	198%	no data
4.64%	Owl Creek Asset Management, L.P.	1,669,952	US$4.0m	337%	0.45%
2.99%	The Vanguard Group, Inc.	1,076,651	US$2.6m	12.1%	no data
2.84%	Brightline Capital Management, LLC	1,022,000	US$2.5m	0.59%	0.83%
2.68%	Charles Schwab Investment Management, Inc.	962,901	US$2.3m	166%	no data
2.29%	Geode Capital Management, LLC	823,044	US$2.0m	106%	no data
2.09%	ICON Advisers, Inc.	750,000	US$1.8m	0%	0.39%
1.28%	Morgan Stanley, Investment Banking and Brokerage Investments	459,483	US$1.1m	5.3%	no data
1.06%	State Street Global Advisors, Inc.	381,208	US$914.9k	156%	no data
0.97%	JPMorgan Chase & Co, Brokerage and Securities Investments	348,198	US$835.7k	-10.7%	no data
0.88%	D. E. Shaw & Co., L.P.	316,474	US$759.5k	-18%	no data
0.84%	Bank of America Corporation, Asset Management Arm	302,965	US$727.1k	-2.71%	no data
0.78%	Lakewood Capital Management, LP	281,279	US$675.1k	0%	0.05%
0.77%	Renaissance Technologies LLC	278,000	US$667.2k	8.64%	no data
0.74%	Northern Trust Global Investments	265,752	US$637.8k	244%	no data
0.67%	Acadian Asset Management LLC	241,977	US$580.7k	-26.5%	no data
0.65%	Frank Bozich	233,758	US$561.0k	0%	no data
0.63%	RBC Dominion Securities Inc., Asset Management Arm	227,500	US$546.0k	0%	no data
0.6%	Jeffrey Cote	216,202	US$518.9k	16.6%	no data
0.58%	Matthew Farrell	207,741	US$498.6k	92.8%	no data
0.53%	UBS Asset Management AG	190,465	US$457.1k	748%	no data
0.53%	Marshall Wace LLP	190,397	US$457.0k	-77.9%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2025/09/01 14:41
End of Day Share Price	2025/08/29 00:00
Earnings	2025/06/30
Annual Earnings	2024/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Trinseo PLC is covered by 10 analysts. 3 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Patrick Duffy Fischer	Barclays
Michael Leithead	Barclays
Kevin McCarthy	BofA Global Research