Trinseo PLC

TSEOQ

Exchange: OTC
Industry: Plastic Materials, Synth Resins & Nonvulcan Elastomers
SEC CIK: 0001519061

SEC filings (opens in a new tab)

No open-market purchases or sales by Trinseo PLC insiders were filed in the last 90 days; 6 institutions reported holding it in 13F filings for Q2 2026, worth $740 in total; no superinvestor holds it.

13F holders, Q4 2021

Institutional positions in Trinseo PLC as of Dec 31, 2021. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders: 185; +2 vs. Q3 2021
Shares held: 35.2M; −1.12M (−3.1%) vs. Q3 2021
Total value: $1.84B; −$118.2M (−6.0%) vs. Q3 2021
New holders: 44; 45 more added
Sold out: 42; 70 more reduced

1 institution that held it in Q3 2021 haven't filed for Q4 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q3 2021: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting TSEOQ on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ4 2021: 185 institutions

Value heldQ4 2021: $1.84B

Institutions holding TSEOQ and their total value by quarter
Quarter	Holders	Value
Q2 2026	6	$740
Q1 2026	14	$11.0K
Q4 2025	73	$12.3M
Q3 2025	75	$60.4M
Q2 2025	80	$85.4M
Q1 2025	85	$95.2M
Q4 2024	95	$126.6M
Q3 2024	71	$116.2M
Q2 2024	98	$56.0M
Q1 2024	109	$105.3M
Q4 2023	128	$241.2M
Q3 2023	146	$241.9M
Q2 2023	145	$418.8M
Q1 2023	167	$695.9M
Q4 2022	182	$746.7M
Q3 2022	182	$585.5M
Q2 2022	194	$1.31B
Q1 2022	189	$1.66B
Q4 2021	185	$1.84B
Q3 2021	184	$1.96B
Q2 2021	214	$2.16B
Q1 2021	209	$2.27B

Institutions, Q4 2021

Shares, value and share of portfolio for each institution holding Trinseo PLC; share changes are against Q3 2021.

Institutions holding TSEOQ in Q4 2021
Institution	Shares	Value	% of portfolio	Change in shares	Action
HRT Financial LP	0	$0	0.00%	−21,155−100.0%	Sold out
Delphi Management Inc	0	$0	0.00%	−16,459−100.0%	Sold out
Hillsdale Investment Management Inc.	0	$0	0.00%	−15,400−100.0%	Sold out
ETF Managers Group, LLC	0	$0	0.00%	−14,406−100.0%	Sold out
Marshall Wace, LLP	0	$0	0.00%	−14,607−100.0%	Sold out
American Portfolios Advisors	0	$0	0.00%	−11,987−100.0%	Sold out
DuPont Capital Management Corp	0	$0	0.00%	−11,433−100.0%	Sold out
Virginia Retirement Systems Et Al	0	$0	0.00%	−10,000−100.0%	Sold out
AMP Capital Investors Ltd	0	$0	0.00%	−8,560−100.0%	Sold out
Walleye Trading LLC	0	$0	0.00%	−8,275−100.0%	Sold out
PVG Asset Management Corp	0	$0	0.00%	−7,698−100.0%	Sold out
Gotham Asset Management, LLC	0	$0	0.00%	−6,690−100.0%	Sold out
Occudo Quantitative Strategies LP	0	$0	0.00%	−6,645−100.0%	Sold out
Mutual Advisors, LLC	0	$0	0.00%	−4,744−100.0%	Sold out
CIBC Asset Management Inc	0	$0	0.00%	−4,505−100.0%	Sold out
XTX Topco Ltd	0	$0	0.00%	−4,329−100.0%	Sold out
Crossmark Global Holdings, Inc.	0	$0	0.00%	−4,100−100.0%	Sold out
Envestnet Asset Management Inc	0	$0	0.00%	−4,068−100.0%	Sold out
Stratos Wealth Partners, LTD.	0	$0	0.00%	−4,000−100.0%	Sold out
O'Shaughnessy Asset Management, LLC	0	$0	0.00%	−2,993−100.0%	Sold out
Dark Forest Capital Management LP	0	$0	0.00%	−2,861−100.0%	Sold out
Islay Capital Management, LLC	0	$0	0.00%	−2,295−100.0%	Sold out
Globeflex Capital L P	0	$0	0.00%	−1,598−100.0%	Sold out
Lazard Asset Management LLC	0	$0	0.00%	−585−100.0%	Sold out
Cutler Group LP	0	$0	0.00%	−170−100.0%	Sold out
Washington Trust Co	0	$0	0.00%	−22−100.0%	Sold out
Red Tortoise LLC	0	$0	0.00%	−70−100.0%	Sold out
Moab Capital Partners LLC	–	–	–	–	Not filed