TRINSEO PLC

Ticker: TSE CUSIP: G9059U107 Class: Foreign Stock

Mariner, LLC's Holding History (CIK: 0001373442)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 39,200 Value ($000) $19 Avg Close $1.19 Range $0.45 - $2.41

Q3 2025

Shares 39,200 Value ($000) $92 Avg Close $2.60 Range $1.90 - $3.32

Q2 2024

Shares 10,735 Value ($000) $25 Avg Close $3.07 Range $2.27 - $4.38

Q1 2024

Shares 30,331 Value ($000) $115 Avg Close $5.24 Range $3.17 - $8.41

Q4 2023

Shares 113,563 Value ($000) $951 Avg Close $6.56 Range $5.38 - $8.66

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	39,200	$19	$1.19	$0.45 - $2.41
Q3 2025	39,200	$92	$2.60	$1.90 - $3.32
Q2 2024	10,735	$25	$3.07	$2.27 - $4.38
Q1 2024	30,331	$115	$5.24	$3.17 - $8.41
Q4 2023	113,563	$951	$6.56	$5.38 - $8.66