TSE

Trinseo PLC

Plastic Materials, Synth Resins & Nonvulcan ElastomersNYSEAccelerated filer

Total Trades

26

Buys

10

Sells

10

Largest Trade

N/A

Insiders

11

Institutional Funds

55

Inst. Value

$1M+

Activist Filings

9

Insider Trades

InsiderTitleTypeValueSharesPriceDate
Frisch JohannaVP AND TREASURERBUY$15K–$50K4K$4.13Mar 14, 2025
COTE JEFFREY JDirectorBUY$100K–$500K151K$3.00Aug 20, 2024
Stasse David PhillipEVP AND CFOBUY$100K–$500K15K$8.89Sep 18, 2023
Desmond Jeanmarie F.DirectorBUY$15K–$50K3K$7.94Sep 13, 2023
Chaclas Angelo N.SVPBUY$100K–$500K20K$8.07Sep 13, 2023
Thomas Timothy JSVPBUY$15K–$50K3K$7.94Sep 13, 2023
BOZICH FRANK ACEO AND PRESIDENTBUY$50K–$100K8K$8.07Sep 13, 2023
MARTENS PHILIP RDirectorSELL$100K–$500K7K$24.59Nov 18, 2022
Desmond Jeanmarie F.DirectorBUY$100K–$500K4K$25.15Sep 9, 2022
COTE JEFFREY JDirectorBUY$100K–$500K10K$31.76Aug 16, 2022
M&G INVESTMENT MANAGEMENT LTD10% OwnerSELL$100K–$500K3K$43.51Jul 20, 2022
Skeete Bernard MVPEXERCISE$15K–$50K944$24.30May 31, 2022
Skeete Bernard MVPSELL$15K–$50K944$46.99May 31, 2022
BOZICH FRANK ACEO and PresidentEXERCISE$500K+21K$24.30May 26, 2022
BOZICH FRANK ACEO and PresidentSELL$500K+21K$43.61May 26, 2022
BOZICH FRANK ACEO and PresidentSELL$500K+21K$45.96Apr 8, 2022
BOZICH FRANK ACEO and PresidentEXERCISE$500K+21K$24.30Apr 8, 2022
ALVARADO JOSEPHDirectorBUY$15K–$50K1K$46.94Mar 16, 2022
BOZICH FRANK ACEO and PresidentGRANTN/A36KMar 9, 2022
BOZICH FRANK ACEO and PresidentSELL$500K+12K$48.13Mar 9, 2022
M&G INVESTMENT MANAGEMENT LTD10% OwnerSELL$100K–$500K3K$57.57Feb 16, 2022
M&G INVESTMENT MANAGEMENT LTD10% OwnerSELL$100K–$500K3K$58.76Feb 14, 2022
BOZICH FRANK ACEO and PresidentSELL$1M+21K$53.89Feb 4, 2022
BOZICH FRANK ACEO and PresidentEXERCISE$500K+21K$24.30Feb 4, 2022
BOZICH FRANK ACEO and PresidentSELL$1M+21K$56.62Jan 7, 2022
BOZICH FRANK ACEO and PresidentEXERCISE$500K+21K$24.30Jan 7, 2022
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Institutional Ownership

13F filings as of Dec 31, 2025 · 55 funds holding

FundShares
M&G Plc7.6M
Nut Tree Capital Management, LP3.5M
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2.1M
ICON ADVISERS INC/CO1.0M
GEODE CAPITAL MANAGEMENT, LLC734K
GSA CAPITAL PARTNERS LLP511K
STATE STREET CORP478K
RENAISSANCE TECHNOLOGIES LLC276K
Alta Fundamental Advisers LLC153K
DEUTSCHE BANK AG\126K
DIMENSIONAL FUND ADVISORS LP74K
BARCLAYS PLC53K
Kohmann Bosshard Financial Services, LLC45K
Nuveen, LLC44K
Mariner, LLC39K
HRT FINANCIAL LP37K
NEW YORK STATE COMMON RETIREMENT FUND30K
GOLDMAN SACHS GROUP INC24K
RHUMBLINE ADVISERS22K
Jain Global LLC19K

Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

CastleKnight Master Fund LP

SC 13G/A · Feb 17, 2026

1.4%

517K shares

5.8%

2.1M shares

CastleKnight Master Fund LP

SC 13G/A · Aug 14, 2025

7.8%

2.8M shares

BlackRock, Inc.

SC 13G · Jul 17, 2025

6.3%

2.3M shares

CastleKnight Master Fund LP

SC 13G · Dec 17, 2024

6.7%

2.4M shares

NUT TREE CAPITAL MANAGEMENT, LP

SC 13G · Nov 14, 2024

9.9%

3.5M shares

AllianceBernstein L.P. 13-4064930

SC 13G · Feb 14, 2022

0.0%

0 shares

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