MIDDLEFIELD BANC CORP

Ticker: MBCN CUSIP: 596304204 Class: Common Stock

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

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

Q4 2025

Shares 112 Value ($000) $4 Avg Close $32.90 Range $26.92 - $37.45

Q3 2025

Shares 112 Value ($000) $3 Avg Close $29.58 Range $26.13 - $33.52

Q4 2021

Shares 749 Value ($000) $18 Avg Close $22.11 Range $20.40 - $24.26

Q3 2021

Shares 749 Value ($000) $18 Avg Close $20.62 Range $19.79 - $21.46

Q2 2021

Shares 749 Value ($000) $18 Avg Close $19.71 Range $17.63 - $22.47

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	112	$4	$32.90	$26.92 - $37.45
Q3 2025	112	$3	$29.58	$26.13 - $33.52
Q4 2021	749	$18	$22.11	$20.40 - $24.26
Q3 2021	749	$18	$20.62	$19.79 - $21.46
Q2 2021	749	$18	$19.71	$17.63 - $22.47