Updated Jul 16, 2026 · Last SEC filing 2026-05-14
Trinseo PLC (TSE) has filed 8 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-05-14. 7 Form 8-K material event filings were reported by TSE in the last 90 days. InsiderAlpha tracks every TSE SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Plastic Materials, Synth Resins & Nonvulcan Elastomers (SIC 2821) |
|---|---|
| SEC CIK | 0001519061 |
| Form 4 filings (90d) | 8 |
|---|---|
| Form 8-K filings (90d) | 7 |
| Latest Form 4 filing | 2026-05-14 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Johnson KLynne | Insider | J — Other acquisition / disposition | 42.5K | — | — | SEC | |
| STEINMETZ HENRI | Insider | J — Other acquisition / disposition | 42.5K | — | — | SEC | |
| FARRELL MATTHEW | Insider | J — Other acquisition / disposition | 42.5K | — | — | SEC | |
| ALVARADO JOSEPH | Insider | J — Other acquisition / disposition | 42.5K | — | — | SEC | |
| COTE JEFFREY J | Insider | J — Other acquisition / disposition | 42.5K | — | — | SEC | |
| LIN SANDRA BEACH | Insider | J — Other acquisition / disposition | 42.5K | — | — | SEC | |
| Desmond Jeanmarie F. | Insider | J — Other acquisition / disposition | 42.5K | — | — | SEC | |
| Brifo Victoria | Insider | J — Other acquisition / disposition | 42.5K | — | — | SEC | |
| Schewe Rainer | SVP, SUPPLY CHAIN & MFG SVCS | F — Tax withholding / forfeiture | 4.0K | $0.23 | $926 | SEC | |
| Hendriks Han | SVP, CHIEF TECHNOLOGY OFFICER | F — Tax withholding / forfeiture | 7.7K | $0.23 | $2K | SEC | |
| van Kessel Bregje | SVP, Corporate Finance & IR | F — Tax withholding / forfeiture | 6.1K | $0.23 | $1K | SEC | |
| Stasse David Phillip | EVP AND CFO | F — Tax withholding / forfeiture | 10.4K | $0.23 | $2K | SEC | |
| Chaclas Angelo N. | SVP, CLO, CCO & CORP. SEC. | F — Tax withholding / forfeiture | 7.6K | $0.23 | $2K | SEC | |
| Reverberi Francesca | SVP, EM and Polymer Solutions | F — Tax withholding / forfeiture | 1.4K | $0.23 | $319 | SEC | |
| BOZICH FRANK A | CEO AND PRESIDENT | F — Tax withholding / forfeiture | 23.7K | $0.23 | $5K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Trinseo PLC (TSE). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| LIN SANDRA BEACH | 1 | — |
| ALVARADO JOSEPH | 1 | — |
| Desmond Jeanmarie F. | 1 | — |
| FARRELL MATTHEW | 1 | — |
| Johnson KLynne | 1 | — |
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in TSE insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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