MIDDLEFIELD BANC CORP

Ticker: MBCN CUSIP: 596304204 Class: Common Stock

MARTINGALE ASSET MANAGEMENT L P's Holding History (CIK: 0000936944)

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

Q2 2019

Shares 9,502 Value ($000) $390 Avg Close $16.39 Range $15.81 - $17.68

Q1 2019

Shares 11,802 Value ($000) $487 Avg Close $17.33 Range $16.11 - $18.21

Q4 2018

Shares 12,202 Value ($000) $518 Avg Close $18.11 Range $15.59 - $19.49

Q3 2018

Shares 14,102 Value ($000) $665 Avg Close $19.82 Range $18.55 - $20.95

Q2 2018

Shares 14,001 Value ($000) $710 Avg Close $20.70 Range $19.11 - $21.85

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2019	9,502	$390	$16.39	$15.81 - $17.68
Q1 2019	11,802	$487	$17.33	$16.11 - $18.21
Q4 2018	12,202	$518	$18.11	$15.59 - $19.49
Q3 2018	14,102	$665	$19.82	$18.55 - $20.95
Q2 2018	14,001	$710	$20.70	$19.11 - $21.85