ADTRAN HOLDINGS INC

Ticker: ADTN CUSIP: 00486H105 Class: Common Stock

UMB Bank, n.a.'s Holding History (CIK: 0000933429)

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

Q3 2025

Shares 2,200 Value ($000) $21 Avg Close $9.32 Range $7.95 - $10.64

Q2 2025

Shares 2,200 Value ($000) $20 Avg Close $7.98 Range $6.93 - $9.17

Q1 2025

Shares 2,200 Value ($000) $19 Avg Close $10.06 Range $8.30 - $12.44

Q2 2023

Shares 548 Value ($000) $6 Avg Close $9.75 Range $7.73 - $15.55

Q1 2023

Shares 548 Value ($000) $9 Avg Close $16.92 Range $14.49 - $19.68

Q4 2022

Shares 548 Value ($000) $0 Avg Close $19.51 Range $17.59 - $22.50

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	2,200	$21	$9.32	$7.95 - $10.64
Q2 2025	2,200	$20	$7.98	$6.93 - $9.17
Q1 2025	2,200	$19	$10.06	$8.30 - $12.44
Q2 2023	548	$6	$9.75	$7.73 - $15.55
Q1 2023	548	$9	$16.92	$14.49 - $19.68
Q4 2022	548	$0	$19.51	$17.59 - $22.50