Trinseo PLC (TSE) - Insider Holders & Insider Ownership

List of insiders holdings for Trinseo PLC:
  1. Shares directly owned by the insider.
  2. Shares indirectly owned by the insider.
  3. Total shares owned by the insider (sum of shares directly and indirectly owned).
  4. Total market value if available.
  5. Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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#Insider Holder NameReport
Date Time		Shares Owned
Directly
Indirectly		Total
Shares Owned		Filing
1Chu Brian
Director
10% Owner		2015-06-29 17:51:133,236
37,269,567		37,272,803Form 4
2Meisel Seth
Director
10% Owner		2015-06-29 18:00:363,236
37,269,567		37,272,803Form 4
3Hauser Felix
Director
10% Owner		2016-08-16 16:14:331,897
10,669,567		10,671,464Form 4
4Vasseur Aurelien
Director
10% Owner		2016-08-16 16:15:540
10,669,567		10,669,567Form 4
5M&G INVESTMENT MANAGEMENT LTD
10% Owner		2022-08-12 13:40:167,625,044
0		7,625,044Form 13D
6BOZICH FRANK A
CEO AND PRESIDENT		2026-03-03 14:20:42664,689
0		664,689Form 4
7Chaclas Angelo N.
SVP, CLO, CCO & CORP. SEC.		2026-03-03 14:21:48274,798
0		274,798Form 4
8COTE JEFFREY J
Director		2025-06-27 16:15:1988,183
170,503		258,686Form 4
9Stasse David Phillip
EVP AND CFO		2026-03-03 14:21:16254,788
0		254,788Form 4
10FARRELL MATTHEW
Director		2025-08-14 17:43:10250,225
0		250,225Form 4
11Reverberi Francesca
SVP, EM and Polymer Solutions		2026-03-03 14:24:43161,250
0		161,250Form 4
12Pappas Christopher D
Director		2020-06-19 14:07:38153,887
0		153,887Form 4
13Cooney Paula M.
SVP, CHRO		2026-03-03 14:22:19118,318
0		118,318Form 4
14Schewe Rainer
SVP, SUPPLY CHAIN & MFG SVCS		2026-03-03 14:25:30103,415
0		103,415Form 4
15van Kessel Bregje
SVP, Corporate Finance & IR		2026-03-03 14:26:0798,296
0		98,296Form 4
16STEINMETZ HENRI
Director		2025-06-27 16:15:1095,937
0		95,937Form 4
17Niziolek Barry J
EVP & Chief Financial Officer		2019-02-28 20:46:2294,733
0		94,733Form 4
18ALVARADO JOSEPH
Director		2025-06-27 16:15:2494,671
0		94,671Form 4
19Johnson KLynne
Director		2025-06-27 16:15:1190,913
0		90,913Form 4
20Desmond Jeanmarie F.
Director		2025-06-27 16:15:1789,036
0		89,036Form 4
21LIN SANDRA BEACH
Director		2025-06-27 16:15:2287,260
0		87,260Form 4
22Horner Marilyn N
SVP - Human Resources		2018-03-08 18:16:3986,801
0		86,801Form 4
23Brifo Victoria
Director		2025-06-27 16:15:2083,225
0		83,225Form 4
24Yarkadas Hayati
SVP & Business President		2019-02-28 20:58:3178,113
0		78,113Form 4
25Hendriks Han
SVP, CHIEF TECHNOLOGY OFFICER		2026-03-03 14:24:1073,362
0		73,362Form 4
26Stedman Timothy M
See remarks		2020-02-27 16:44:2771,777
0		71,777Form 4
27FEENAN JOHN A
See Remarks		2015-03-03 21:32:1169,314
0		69,314Form 4
28Yang Arthas Bing
SVP, Latex Binders		2026-03-03 14:26:5149,457
0		49,457Form 4
29Greene Roger
VP, GLOBAL CONTROLLER & PAO		2026-03-03 14:22:5045,101
0		45,101Form 4
30TOMKINS MARK E
Director		2025-06-24 16:15:2436,619
0		36,619Form 4
31Denton E. Jeffery
VP - Supply Chain Services		2020-02-27 16:51:0636,586
0		36,586Form 4
32ZIDE STEPHEN M
Director		2020-06-19 14:06:4936,281
0		36,281Form 4
33De Leener Pierre-Marie
Director		2025-06-24 16:15:1736,174
0		36,174Form 4
34Pugh Martin
See Remarks		2017-03-03 15:06:4527,729
0		27,729Form 4
35HEEZEN ALICE
SVP - Human Resources		2021-11-16 16:03:2525,650
0		25,650Form 4
36Keenan Catherine C.
See Remarks		2020-02-27 16:49:4224,042
0		24,042Form 4
37Misheff Donald T
Director		2023-07-13 17:09:2019,654
0		19,654Form 4/A
38Lanning Andre
SVP & CCO		2023-02-28 17:25:5618,145
0		18,145Form 4
39Beal Jean-Luc
SVP, Engineered Materials		2023-02-24 17:27:0218,133
0		18,133Form 4
40Thomas Timothy J
SVP, MFCTG & OPER EXCELLENCE		2024-02-21 20:59:4517,737
0		17,737Form 4
41Schmitz Rudiger
VP, Latex Binders		2020-05-08 15:15:1617,203
0		17,203Form 3
42Frisch Johanna
VP AND TREASURER		2025-10-02 16:05:1515,898
0		15,898Form 4
43Joly Nicolas
SVP, Styrenics		2023-02-28 16:55:1714,928
0		14,928Form 4
44Leib Ryan J
Vice President and Treasurer		2021-03-01 16:11:0713,764
0		13,764Form 4
45Skeete Bernard M
VP, CAO & Global Controller		2023-02-28 17:32:3012,822
0		12,822Form 4
46MARTENS PHILIP R
Director		2023-07-13 17:03:109,414
0		9,414Form 4/A
47Ni James Mingyu
SVP, LATEX BINDERS		2024-02-21 21:03:256,904
0		6,904Form 4
48Plantevin Michel
Director
10% Owner		2016-09-27 16:53:474,485
0		4,485Form 4
49Thomas Stephen F.
Director
10% Owner		2016-09-27 16:52:271,897
0		1,897Form 4
50Frizzley Jill Kathleen
Director		2026-01-20 15:20:310
0		0Form 3
51Flaton Carol
Director		2026-01-20 15:21:280
0		0Form 3
52Levi Marco
See Remarks		2014-06-11 18:37:160
0		0Form 3
53Krecke Jeannot
Director		2017-03-09 17:29:050
0		0Form 3
54BAIN CAPITAL INVESTORS LLC
BCIP Trust Associates IV-B L.P.
10% Owner		2016-09-27 16:56:250
0		0Form 4
55BAIN CAPITAL INVESTORS LLC
Bain Capital Everest Manager Holding SCA
Bain Capital Everest Manager S.a.r.l.
Bain Capital Europe Fund III L.P.
Bain Capital Partners Europe III L.P.
Bain Capital Fund X LP
Bain Capital Partners X L.P.
BCIP Associates IV L.P.
BCIP Associates IV-B L.P.
BCIP Trust Associates IV L.P.
10% Owner		2017-02-14 16:22:160
0		0Form 13G
56Springham Ruth
Director
10% Owner		2016-09-27 16:50:390
0		0Form 4
57SHAW CURTIS S
See Remarks		2014-06-11 18:51:370
0		0Form 3