INTERNATIONAL BANCSHARES COR

Ticker: IBOC CUSIP: 459044103 Class: Common Stock

Optiver Holding B.V.'s Holding History (CIK: 0001859606)

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

Q4 2025

Shares 288 Value ($000) $19 Avg Close $67.01 Range $62.56 - $72.92

Q3 2025

Shares 470 Value ($000) $32 Avg Close $68.84 Range $64.80 - $72.84

Q2 2025

Shares 536 Value ($000) $36 Avg Close $61.16 Range $53.03 - $65.91

Q1 2025

Shares 432 Value ($000) $27 Avg Close $63.01 Range $59.03 - $66.45

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	288	$19	$67.01	$62.56 - $72.92
Q3 2025	470	$32	$68.84	$64.80 - $72.84
Q2 2025	536	$36	$61.16	$53.03 - $65.91
Q1 2025	432	$27	$63.01	$59.03 - $66.45