ADTRAN HOLDINGS INC

Ticker: ADTN CUSIP: 00486H105 Class: Common Stock

Nierenberg Investment Management Company, Inc.'s Holding History (CIK: 0001282683)

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

Q4 2025

Shares 93,110 Value ($000) $809 Avg Close $8.68 Range $7.11 - $10.75

Q3 2025

Shares 343,110 Value ($000) $3,218 Avg Close $9.32 Range $7.95 - $10.64

Q2 2025

Shares 343,110 Value ($000) $3,078 Avg Close $7.98 Range $6.93 - $9.17

Q1 2025

Shares 435,110 Value ($000) $3,794 Avg Close $10.06 Range $8.30 - $12.44

Q4 2024

Shares 343,110 Value ($000) $2,858 Avg Close $7.38 Range $5.67 - $9.21

Q3 2024

Shares 343,110 Value ($000) $2,035 Avg Close $5.57 Range $4.62 - $6.92

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	93,110	$809	$8.68	$7.11 - $10.75
Q3 2025	343,110	$3,218	$9.32	$7.95 - $10.64
Q2 2025	343,110	$3,078	$7.98	$6.93 - $9.17
Q1 2025	435,110	$3,794	$10.06	$8.30 - $12.44
Q4 2024	343,110	$2,858	$7.38	$5.67 - $9.21
Q3 2024	343,110	$2,035	$5.57	$4.62 - $6.92