MIDDLEFIELD BANC CORP

Ticker: MBCN CUSIP: 596304204 Class: Common Stock

WELLINGTON MANAGEMENT GROUP LLP's Holding History (CIK: 0000902219)

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

Q1 2016

Shares 10,351 Value ($000) $326 Avg Close $12.32 Range $11.84 - $12.85

Q4 2015

Shares 10,351 Value ($000) $336 Avg Close $12.01 Range $10.15 - $12.99

Q3 2015

Shares 10,351 Value ($000) $317 Avg Close $11.61 Range $11.19 - $12.60

Q2 2015

Shares 10,750 Value ($000) $339 Avg Close $11.86 Range $11.52 - $12.50

Q1 2015

Shares 14,363 Value ($000) $454 Avg Close $12.07 Range $11.48 - $12.59

Q4 2014

Shares 14,363 Value ($000) $496 Avg Close $12.01 Range $11.91 - $12.80

Q3 2014

Shares 14,363 Value ($000) $486 Avg Close $10.96 Range $10.16 - $12.87

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2016	10,351	$326	$12.32	$11.84 - $12.85
Q4 2015	10,351	$336	$12.01	$10.15 - $12.99
Q3 2015	10,351	$317	$11.61	$11.19 - $12.60
Q2 2015	10,750	$339	$11.86	$11.52 - $12.50
Q1 2015	14,363	$454	$12.07	$11.48 - $12.59
Q4 2014	14,363	$496	$12.01	$11.91 - $12.80
Q3 2014	14,363	$486	$10.96	$10.16 - $12.87