DT MIDSTREAM INC

Ticker: DTM CUSIP: 23345M107 Class: COMMON STOCK

Alyeska Investment Group, L.P.'s Holding History (CIK: 0001453072)

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

Q4 2025

Shares 205,567 Value ($000) $24,602 Avg Close $114.29 Range $104.28 - $121.96

Q4 2024

Shares 19,325 Value ($000) $1,921 Avg Close $91.78 Range $75.01 - $105.74

Q3 2024

Shares 96,492 Value ($000) $7,590 Avg Close $71.25 Range $65.67 - $76.75

Q2 2024

Shares 147,705 Value ($000) $10,491 Avg Close $62.00 Range $57.09 - $68.50

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	205,567	$24,602	$114.29	$104.28 - $121.96
Q4 2024	19,325	$1,921	$91.78	$75.01 - $105.74
Q3 2024	96,492	$7,590	$71.25	$65.67 - $76.75
Q2 2024	147,705	$10,491	$62.00	$57.09 - $68.50