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Trinseo (TSE) SEC Filings & 10K Form

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$2.40 -0.06 (-2.24%)
Closing price 08/28/2025 03:59 PM Eastern
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Recent Trinseo SEC Filings

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DateFilerForm TypeView
08/26/2025
4:11 PM		Trinseo (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
08/14/2025
6:06 PM		CastleKnight Master Fund LP (Filed by)
Trinseo (Subject)
Form SCHEDULE 13G/A
08/14/2025
4:43 PM		FARRELL MATTHEW (Reporting)
Trinseo (Issuer)
Form 4
Statement of changes in beneficial ownership of securities  
08/07/2025
11:09 AM		Trinseo (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
08/06/2025
3:24 PM		Trinseo (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
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  
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  
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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
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  
(Data available from 1/1/2016 forward)


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This page (NYSE:TSE) was last updated on 8/29/2025 by MarketBeat.com Staff
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