Trinseo PLC - TSE

All tracked SEC files for this issuer. Showing up to 200 latest records.
Need parsed ownership details (13D/13G with shares/percent)? Open ownership details
Form 4 = insider transactions report. Form 144 = notice of proposed sale (not a completed trade confirmation).

Files summary

Total files loaded: 23
Latest filed: Sep 30, 2026
Form Count
8-K 13
4 8
8-K/A 1
SCHEDULE 13G/A 1

Latest files

Filed Form Report period Accession SEC
Sep 30, 2026 8-K Sep 30, 2026 0001104659-26-112217 View
Sep 23, 2026 8-K Sep 23, 2026 0001104659-26-109915 View
Aug 14, 2026 8-K Aug 14, 2026 0001104659-26-096792 View
Aug 06, 2026 8-K Aug 06, 2026 0001104659-26-091904 View
Jul 17, 2026 8-K Jul 17, 2026 0001104659-26-084626 View
Jun 12, 2026 8-K/A May 28, 2026 0001104659-26-073451 View
Jun 01, 2026 8-K May 28, 2026 0001104659-26-068944 View
May 26, 2026 8-K May 25, 2026 0001104659-26-066376 View
May 15, 2026 SCHEDULE 13G/A — 0000905148-26-002423 View
May 15, 2026 8-K May 15, 2026 0001104659-26-062804 View
May 14, 2026 4 May 12, 2026 0001220571-26-000002 View
May 14, 2026 4 May 12, 2026 0001207044-26-000001 View
May 14, 2026 4 May 12, 2026 0001196053-26-000001 View
May 14, 2026 4 May 12, 2026 0001867705-26-000001 View
May 14, 2026 4 May 12, 2026 0001532447-26-000001 View
May 14, 2026 4 May 12, 2026 0001047461-26-000001 View
May 14, 2026 4 May 12, 2026 0001196701-26-000001 View
May 14, 2026 4 May 12, 2026 0001713192-26-000003 View
May 14, 2026 8-K May 13, 2026 0001104659-26-060590 View
Apr 30, 2026 8-K Apr 30, 2026 0001104659-26-053165 View
Apr 30, 2026 8-K Apr 30, 2026 0001104659-26-052333 View
Apr 15, 2026 8-K Apr 14, 2026 0001104659-26-043485 View
Apr 13, 2026 8-K Apr 10, 2026 0001104659-26-042351 View