ADTRAN HOLDINGS INC

Ticker: ADTN CUSIP: 00486H105 Class: Common Stock

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

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

Q4 2025

Shares 545,464 Value ($000) $4,740 Avg Close $8.68 Range $7.11 - $10.75

Q3 2025

Shares 1,084,029 Value ($000) $10,168 Avg Close $9.32 Range $7.95 - $10.64

Q1 2025

Shares 445,264 Value ($000) $3,883 Avg Close $10.06 Range $8.30 - $12.44

Q2 2024

Shares 570,066 Value ($000) $2,999 Avg Close $5.10 Range $4.34 - $5.87

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	545,464	$4,740	$8.68	$7.11 - $10.75
Q3 2025	1,084,029	$10,168	$9.32	$7.95 - $10.64
Q1 2025	445,264	$3,883	$10.06	$8.30 - $12.44
Q2 2024	570,066	$2,999	$5.10	$4.34 - $5.87