Trinseo PLC (TSEOF) Insider Ownership

Historic Insider Ownership Trends

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Investment Management Ltd Mg - 0 7,631,044 14 Feb, 2022
Joseph Alvarado - 94,671 0 27 Jun, 2025
Philip R Martens - 9,414 0 13 Jul, 2023
Matthew Farrell - 250,225 0 14 Aug, 2025
Jeffrey J Cote - 0 150,600 20 Aug, 2024
Mark E Tomkins - 36,619 0 24 Jun, 2025
Henri Steinmetz - 95,937 0 27 Jun, 2025
Sandra Beach Lin - 87,260 0 27 Jun, 2025
Leener Pierre-Marie De - 36,174 0 24 Jun, 2025
David Phillip Stasse Evp And Cfo 254,788 0 03 Mar, 2026
Klynne Johnson - 90,913 0 27 Jun, 2025
Donald T Misheff - 19,654 0 13 Jul, 2023
Angelo N. Chaclas Svp, Clo, Cco Corp. Sec. 274,798 0 03 Mar, 2026
Frank A Bozich Ceo And President 664,689 0 03 Mar, 2026
Rainer Schewe Svp, Supply Chain Mfg Svcs 103,415 0 03 Mar, 2026
Paula M. Cooney Svp, Chro 118,318 0 03 Mar, 2026
Jeanmarie F. Desmond - 89,036 0 27 Jun, 2025
Alice Heezen Svp Human Resources 10,081 0 16 Nov, 2021
Bernard M Skeete Vp, Cao Global Controller 12,822 0 28 Feb, 2023
Timothy J Thomas Svp, Mfctg Oper Excellence 17,737 0 21 Feb, 2024
Andre Lanning Svp Cco 18,145 0 28 Feb, 2023
Nicolas Joly Svp, Styrenics 14,928 0 28 Feb, 2023
Francesca Reverberi Svp, Em And Polymer Solutions 161,250 0 03 Mar, 2026
James Mingyu Ni Svp, Latex Binders 6,904 0 21 Feb, 2024
Jean-Luc Beal Svp, Engineered Materials 9,254 0 24 Feb, 2023
Victoria Brifo - 83,225 0 27 Jun, 2025
Johanna Frisch Vp And Treasurer 15,898 0 02 Oct, 2025
Han Hendriks Svp, Chief Technology Officer 73,362 0 03 Mar, 2026
Kessel Bregje Van Svp, Corporate Finance Ir 98,296 0 03 Mar, 2026
Roger Greene Vp, Global Controller Pao 45,101 0 03 Mar, 2026
Arthas Bing Yang Svp, Latex Binders 49,457 0 03 Mar, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
27 Feb, 2026 Frank A Bozich Ordinary Shares D 23,680 $0.23 664,689 D F
27 Feb, 2026 Rainer Schewe Ordinary Shares D 4,028 $0.23 103,415 D F
27 Feb, 2026 Francesca Reverberi Ordinary Shares D 1,385 $0.23 161,250 D F
27 Feb, 2026 Paula M. Cooney Ordinary Shares D 7,670 $0.23 118,318 D F
27 Feb, 2026 Angelo N. Chaclas Ordinary Shares D 7,607 $0.23 274,798 D F
27 Feb, 2026 Arthas Bing Yang Ordinary Shares D 2,548 $0.23 49,457 D F
27 Feb, 2026 Roger Greene Ordinary Shares D 2,517 $0.23 45,101 D F
27 Feb, 2026 Kessel Bregje Van Ordinary Shares D 6,064 $0.23 98,296 D F
27 Feb, 2026 David Phillip Stasse Ordinary Shares D 10,366 $0.23 254,788 D F
27 Feb, 2026 Han Hendriks Ordinary Shares D 7,707 $0.23 73,362 D F
27 Feb, 2026 Kessel Bregje Van Ordinary Shares D 6,064 $0.23 98,296 D F
27 Feb, 2026 Arthas Bing Yang Ordinary Shares D 2,548 $0.23 49,457 D F
21 Feb, 2026 Angelo N. Chaclas Ordinary Shares D 3,690 $0.33 289,503 D F
21 Feb, 2026 Rainer Schewe Ordinary Shares D 3,907 $0.33 108,649 D F
21 Feb, 2026 David Phillip Stasse Ordinary Shares D 5,028 $0.33 274,825 D F
21 Feb, 2026 Roger Greene Ordinary Shares D 2,238 $0.33 47,618 D F
21 Feb, 2026 Han Hendriks Ordinary Shares D 6,331 $0.33 83,360 D F
21 Feb, 2026 Kessel Bregje Van Ordinary Shares D 5,963 $0.33 105,695 D F
21 Feb, 2026 Arthas Bing Yang Ordinary Shares D 1,898 $0.33 52,552 D F
21 Feb, 2026 Paula M. Cooney Ordinary Shares D 7,440 $0.33 128,672 D F