ADTRAN HOLDINGS INC

Ticker: ADTN CUSIP: 00486H105 Class: Common Stock

BANK OF MONTREAL /CAN/'s Holding History (CIK: 0000927971)

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

Q4 2025

Shares 50,328 Value ($000) $437 Avg Close $8.68 Range $7.11 - $10.75

Q1 2025

Shares 14,707 Value ($000) $128 Avg Close $10.06 Range $8.30 - $12.44

Q3 2023

Shares 12,282 Value ($000) $101 Avg Close $8.83 Range $6.92 - $10.84

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	50,328	$437	$8.68	$7.11 - $10.75
Q1 2025	14,707	$128	$10.06	$8.30 - $12.44
Q3 2023	12,282	$101	$8.83	$6.92 - $10.84