07/17/2025
6:44 PM | BlackRock, Inc. (Filed by)
Trinseo (Subject)
| Form SCHEDULE 13G | |
06/26/2025
8:22 AM | Trinseo (Filer)
| Form 8-K
Current report pursuant to Section 13 or 15(d) | |
06/24/2025
3:15 PM | ALVARADO JOSEPH (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
06/24/2025
3:15 PM | Desmond Jeanmarie F. (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
06/24/2025
3:15 PM | Johnson KLynne (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
06/24/2025
3:15 PM | Brifo Victoria (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
06/24/2025
3:15 PM | COTE JEFFREY J (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
06/24/2025
3:15 PM | De Leener Pierre-Marie (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
06/24/2025
3:15 PM | FARRELL MATTHEW (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
06/24/2025
3:15 PM | LIN SANDRA BEACH (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
06/24/2025
3:15 PM | STEINMETZ HENRI (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
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06/24/2025
3:15 PM | TOMKINS MARK E (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
05/08/2025
11:21 AM | Trinseo (Filer)
| Form 10-Q
General form for quarterly reports under Section 13 or 15(d) | |
05/07/2025
4:26 PM | Trinseo (Filer)
| Form 8-K
Current report pursuant to Section 13 or 15(d) | |
04/29/2025
11:23 AM | Trinseo (Filer)
| Form DEF 14A | |
04/29/2025
11:26 AM | Trinseo (Filer)
| Form DEFA14A | |
04/29/2025
11:30 AM | Trinseo (Filer)
| Form ARS | |
04/18/2025
12:18 PM | Trinseo (Filer)
| Form PRE 14A | |
03/20/2025
3:30 PM | Trinseo (Filer)
| Form 8-K
Current report pursuant to Section 13 or 15(d) | |
03/14/2025
2:14 PM | Frisch Johanna (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
03/03/2025
2:50 PM | Trinseo (Issuer)
Yang Arthas Bing (Reporting)
| Form 4
Statement of changes in beneficial ownership of securities | |
03/03/2025
2:51 PM | Trinseo (Issuer)
van Kessel Bregje (Reporting)
| Form 4
Statement of changes in beneficial ownership of securities | |
03/03/2025
2:52 PM | Stasse David Phillip (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
03/03/2025
2:52 PM | Schewe Rainer (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
02/27/2025
10:53 AM | Trinseo (Filer)
| Form 10-K
Annual report pursuant to Section 13 or 15(d) | |
02/25/2025
11:52 AM | Reverberi Francesca (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
02/25/2025
11:53 AM | Trinseo (Issuer)
van Kessel Bregje (Reporting)
| Form 4
Statement of changes in beneficial ownership of securities | |
02/25/2025
11:54 AM | Trinseo (Issuer)
Yang Arthas Bing (Reporting)
| Form 4
Statement of changes in beneficial ownership of securities | |
02/25/2025
11:46 AM | BOZICH FRANK A (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
02/25/2025
11:47 AM | Chaclas Angelo N. (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
02/25/2025
11:47 AM | Cooney Paula M. (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
02/25/2025
11:48 AM | Frisch Johanna (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
02/25/2025
11:49 AM | Greene Roger (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
02/25/2025
11:50 AM | Hendriks Han (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
02/25/2025
11:50 AM | Schewe Rainer (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
02/25/2025
11:51 AM | Stasse David Phillip (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
02/12/2025
3:24 PM | Trinseo (Filer)
| Form 8-K
Current report pursuant to Section 13 or 15(d) | |
01/21/2025
5:31 AM | Trinseo (Filer)
| Form 8-K
Current report pursuant to Section 13 or 15(d) | |
01/17/2025
4:09 PM | Trinseo (Filer)
| Form 8-K
Current report pursuant to Section 13 or 15(d) | |
01/16/2025
5:30 AM | Trinseo (Filer)
| Form 8-K
Current report pursuant to Section 13 or 15(d) | |
12/17/2024
4:11 PM | CastleKnight Master Fund LP (Filed by)
Trinseo (Subject)
| Form SC 13G | |
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12/17/2024
5:00 AM | Trinseo (Filer)
| Form 8-K
Current report pursuant to Section 13 or 15(d) | |
12/11/2024
5:01 AM | Trinseo (Filer)
| Form 8-K
Current report pursuant to Section 13 or 15(d) | |
12/10/2024
5:45 AM | Trinseo (Filer)
| Form 8-K
Current report pursuant to Section 13 or 15(d) | |
12/03/2024
4:29 PM | Cooney Paula M. (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
11/07/2024
10:18 AM | Trinseo (Filer)
| Form 10-Q
General form for quarterly reports under Section 13 or 15(d) | |
11/06/2024
4:19 PM | Trinseo (Filer)
| Form 8-K
Current report pursuant to Section 13 or 15(d) | |
10/07/2024
4:02 PM | Trinseo (Filer)
| Form 8-K/A | |
10/07/2024
1:51 PM | Hendriks Han (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
09/30/2024
3:20 PM | Trinseo (Filer)
| Form 8-K
Current report pursuant to Section 13 or 15(d) | |
09/27/2024
10:56 AM | Greene Roger (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
09/24/2024
2:18 PM | Frisch Johanna (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
08/20/2024
9:24 AM | COTE JEFFREY J (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
08/14/2024
8:28 AM | Chaclas Angelo N. (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
08/14/2024
8:29 AM | BOZICH FRANK A (Reporting)
Trinseo (Issuer)
| Form 4
Statement of changes in beneficial ownership of securities | |
08/13/2024
5:22 PM | TOMKINS MARK E (Reporting)
Trinseo (Subject)
| Form 144
Notice of proposed sale of securities pursuant to Rule 144 | |
08/07/2024
11:39 AM | Trinseo (Filer)
| Form 10-Q
General form for quarterly reports under Section 13 or 15(d) | |
08/06/2024
3:27 PM | Trinseo (Filer)
| Form 8-K
Current report pursuant to Section 13 or 15(d) | |
