DT MIDSTREAM INC

Ticker: DTM CUSIP: 23345M107 Class: COMMON STOCK

Coastline Trust Co's Holding History (CIK: 0001324279)

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

Q4 2025

Shares 150 Value ($000) $18 Avg Close $114.29 Range $104.28 - $121.96

Q3 2025

Shares 150 Value ($000) $17 Avg Close $103.16 Range $96.65 - $113.33

Q2 2025

Shares 150 Value ($000) $16 Avg Close $99.18 Range $81.47 - $109.51

Q1 2025

Shares 150 Value ($000) $14 Avg Close $97.17 Range $82.90 - $111.03

Q4 2024

Shares 150 Value ($000) $15 Avg Close $91.78 Range $75.01 - $105.74

Q3 2024

Shares 150 Value ($000) $12 Avg Close $71.25 Range $65.67 - $76.75

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	150	$18	$114.29	$104.28 - $121.96
Q3 2025	150	$17	$103.16	$96.65 - $113.33
Q2 2025	150	$16	$99.18	$81.47 - $109.51
Q1 2025	150	$14	$97.17	$82.90 - $111.03
Q4 2024	150	$15	$91.78	$75.01 - $105.74
Q3 2024	150	$12	$71.25	$65.67 - $76.75