Trinseo PLC (TSE) has 20 known insider and institutional holders on record. The largest holder is Thomas Stephen F. with 10,669,567 shares. Other notable holders include Hauser Felix and Plantevin Michel.
Over the last 12 months, insiders have made 18 transactions in TSE stock — 8 buys (valued at RSU Award) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
TSE Insider Ownership
Top Holder
Thomas Stephen F.
10,669,567 shares
Buys (12 mo)
8
$0.00 value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Thomas Stephen F. |
10 Percent Owner |
10,669,567 |
2016-08-16 |
|
| 2 |
Hauser Felix |
10 Percent Owner |
10,669,567 |
2016-08-16 |
|
| 3 |
Plantevin Michel |
10 Percent Owner |
10,669,567 |
2016-08-16 |
|
| 4 |
Springham Ruth |
10 Percent Owner |
10,669,567 |
2016-09-06 |
|
| 5 |
Vasseur Aurelien |
10 Percent Owner |
10,669,567 |
2016-08-16 |
|
| 6 |
Bain Capital Investors Llc |
10 Percent Owner |
10,669,567 |
2016-08-16 |
|
| 7 |
M&g Investment Management Ltd |
Director |
7,625,044 |
2022-07-20 |
|
| 8 |
Bozich Frank A |
CEO and President |
720,971 |
2025-03-03 |
|
| 9 |
Chaclas Angelo N. |
SVP, CLO, Cco & Corp. Sec. |
293,193 |
2025-03-03 |
|
| 10 |
Stasse David Phillip |
EVP and CFO |
279,853 |
2025-03-03 |
|
| 11 |
Reverberi Francesca |
SVP, Em and Polymer Solutions |
164,131 |
2025-03-03 |
|
| 12 |
Pappas Christopher D |
Director |
153,887 |
2020-06-19 |
|
| 13 |
Farrell Matthew |
Director |
150,225 |
2025-06-27 |
|
| 14 |
Cooney Paula M. |
SVP, Chro |
136,112 |
2025-03-03 |
|
| 15 |
Schewe Rainer |
SVP, Supply Chain & Mfg Svcs |
112,556 |
2025-03-03 |
|
| 16 |
Van Kessel Bregje |
SVP, Corporate Finance & IR |
111,658 |
2025-03-03 |
|
| 17 |
Steinmetz Henri |
Director |
95,937 |
2025-06-27 |
|
| 18 |
Alvarado Joseph |
Director |
94,671 |
2025-06-27 |
|
| 19 |
Hendriks Han |
SVP, Chief Technology Officer |
91,758 |
2025-03-03 |
|
| 20 |
Johnson Klynne |
Director |
90,913 |
2025-06-27 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2025-06-25 |
Brifo Victoria |
Director |
RSU Award |
42,484 |
- |
- |
| 2025-06-25 |
Desmond Jeanmarie F. |
Director |
RSU Award |
42,484 |
- |
- |
| 2025-06-25 |
Johnson Klynne |
Director |
RSU Award |
42,484 |
- |
- |
| 2025-06-25 |
Lin Sandra Beach |
Director |
RSU Award |
42,484 |
- |
- |
| 2025-06-25 |
Steinmetz Henri |
Director |
RSU Award |
42,484 |
- |
- |
| 2025-06-25 |
Cote Jeffrey J |
Director |
RSU Award |
42,484 |
- |
- |
| 2025-06-25 |
Farrell Matthew |
Director |
RSU Award |
42,484 |
- |
- |
| 2025-06-25 |
Alvarado Joseph |
Director |
RSU Award |
42,484 |
- |
- |
| 2025-06-21 |
Brifo Victoria |
Director |
Tax Withholding of RSU |
9,576 |
$3.73 |
$35.72K |
| 2025-06-21 |
Desmond Jeanmarie F. |
Director |
Tax Withholding of RSU |
10,343 |
$3.73 |
$38.58K |
| 2025-06-21 |
Johnson Klynne |
Director |
Tax Withholding of RSU |
10,474 |
$3.73 |
$39.07K |
| 2025-06-21 |
De Leener Pierre-marie |
Director |
Tax Withholding of RSU |
20,001 |
$3.73 |
$74.6K |
| 2025-06-21 |
Lin Sandra Beach |
Director |
Tax Withholding of RSU |
10,310 |
$3.73 |
$38.46K |
| 2025-06-21 |
Steinmetz Henri |
Director |
Tax Withholding of RSU |
20,001 |
$3.73 |
$74.6K |
| 2025-06-21 |
Tomkins Mark E |
Director |
Tax Withholding of RSU |
10,105 |
$3.73 |
$37.69K |
| 2025-06-21 |
Cote Jeffrey J |
Director |
Tax Withholding of RSU |
10,310 |
$3.73 |
$38.46K |
| 2025-06-21 |
Farrell Matthew |
Director |
Tax Withholding of RSU |
9,576 |
$3.73 |
$35.72K |
| 2025-06-21 |
Alvarado Joseph |
Director |
Tax Withholding of RSU |
10,327 |
$3.73 |
$38.52K |
