Trinseo's top three insider shareholders as of March 23, 2026 are Frank A Bozich (Ceo And President, 664.69K shares), Angelo N. Chaclas (Svp, Clo, Cco Corp. Sec., 274.80K shares), David Phillip Stasse (Evp And Cfo, 254.79K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Frank A Bozich | Ceo And President | 664,689 | 0 | 03 Mar, 2026 |
| Angelo N. Chaclas | Svp, Clo, Cco Corp. Sec. | 274,798 | 0 | 03 Mar, 2026 |
| David Phillip Stasse | Evp And Cfo | 254,788 | 0 | 03 Mar, 2026 |
| Francesca Reverberi | Svp, Em And Polymer Solutions | 161,250 | 0 | 03 Mar, 2026 |
| Paula M. Cooney | Svp, Chro | 118,318 | 0 | 03 Mar, 2026 |
| Rainer Schewe | Svp, Supply Chain Mfg Svcs | 103,415 | 0 | 03 Mar, 2026 |
| Kessel Bregje Van | Svp, Corporate Finance Ir | 98,296 | 0 | 03 Mar, 2026 |
| Klynne Johnson | 90,913 | 0 | 27 Jun, 2025 | |
| Jeanmarie F. Desmond | 89,036 | 0 | 27 Jun, 2025 | |
| Victoria Brifo | 83,225 | 0 | 27 Jun, 2025 | |
| Han Hendriks | Svp, Chief Technology Officer | 73,362 | 0 | 03 Mar, 2026 |
| Arthas Bing Yang | Svp, Latex Binders | 49,457 | 0 | 03 Mar, 2026 |
| Roger Greene | Vp, Global Controller Pao | 45,101 | 0 | 03 Mar, 2026 |
| Leener Pierre-Marie De | 36,174 | 0 | 24 Jun, 2025 | |
| Donald T Misheff | 19,654 | 0 | 13 Jul, 2023 | |
| Andre Lanning | Svp Cco | 18,145 | 0 | 28 Feb, 2023 |
| Timothy J Thomas | Svp, Mfctg Oper Excellence | 17,737 | 0 | 21 Feb, 2024 |
| Johanna Frisch | Vp And Treasurer | 15,898 | 0 | 02 Oct, 2025 |
| Nicolas Joly | Svp, Styrenics | 14,928 | 0 | 28 Feb, 2023 |
| Bernard M Skeete | Vp, Cao Global Controller | 12,822 | 0 | 28 Feb, 2023 |
| Alice Heezen | Svp Human Resources | 10,081 | 0 | 16 Nov, 2021 |
| Jean-Luc Beal | Svp, Engineered Materials | 9,254 | 0 | 24 Feb, 2023 |
| James Mingyu Ni | Svp, Latex Binders | 6,904 | 0 | 21 Feb, 2024 |
* 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.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 27 Feb, 2026 | Arthas Bing Yang | Ordinary Shares | D | 2,548 | $0.23 | 49,457 | D | F |
| 27 Feb, 2026 | Kessel Bregje Van | Ordinary Shares | D | 6,064 | $0.23 | 98,296 | 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 | Rainer Schewe | Ordinary Shares | D | 4,028 | $0.23 | 103,415 | D | F |
| 27 Feb, 2026 | Roger Greene | Ordinary Shares | D | 2,517 | $0.23 | 45,101 | D | F |
| 27 Feb, 2026 | Han Hendriks | Ordinary Shares | D | 7,707 | $0.23 | 73,362 | D | F |
| 27 Feb, 2026 | David Phillip Stasse | Ordinary Shares | D | 10,366 | $0.23 | 254,788 | D | F |
| 27 Feb, 2026 | Francesca Reverberi | Ordinary Shares | D | 1,385 | $0.23 | 161,250 | D | F |
| 27 Feb, 2026 | Frank A Bozich | Ordinary Shares | D | 23,680 | $0.23 | 664,689 | D | F |
| 21 Feb, 2026 | Rainer Schewe | Ordinary Shares | D | 3,907 | $0.33 | 108,649 | D | F |
| 21 Feb, 2026 | Arthas Bing Yang | Ordinary Shares | D | 1,898 | $0.33 | 52,552 | D | F |
| 21 Feb, 2026 | Kessel Bregje Van | Ordinary Shares | D | 5,963 | $0.33 | 105,695 | D | F |
| 21 Feb, 2026 | Han Hendriks | Ordinary Shares | D | 6,331 | $0.33 | 83,360 | D | F |
| 21 Feb, 2026 | Angelo N. Chaclas | Ordinary Shares | D | 3,690 | $0.33 | 289,503 | D | F |
| 21 Feb, 2026 | Paula M. Cooney | Ordinary Shares | D | 7,440 | $0.33 | 128,672 | 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 | Francesca Reverberi | Ordinary Shares | D | 1,163 | $0.33 | 162,968 | D | F |
| 22 Feb, 2026 | Frank A Bozich | Ordinary Shares | D | 32,602 | $0.33 | 688,369 | D | F |