PROSPERITY BANCSHARES INC

Ticker: PB CUSIP: 743606105 Class: Common Stock

BLAIR WILLIAM & CO/IL's Holding History (CIK: 0000902367)

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

Q2 2014

Shares 211,125 Value ($000) $13,216 Avg Close $44.09 Range $40.79 - $49.12

Q1 2014

Shares 222,635 Value ($000) $14,727 Avg Close $45.93 Range $43.33 - $49.26

Q4 2013

Shares 188,505 Value ($000) $11,949 Avg Close $45.63 Range $44.19 - $47.30

Q3 2013

Shares 230,325 Value ($000) $14,243 Avg Close $42.75 Range $37.32 - $44.78

Q2 2013

Shares 224,095 Value ($000) $11,606 Avg Close $34.46 Range $31.76 - $37.71

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2014	211,125	$13,216	$44.09	$40.79 - $49.12
Q1 2014	222,635	$14,727	$45.93	$43.33 - $49.26
Q4 2013	188,505	$11,949	$45.63	$44.19 - $47.30
Q3 2013	230,325	$14,243	$42.75	$37.32 - $44.78
Q2 2013	224,095	$11,606	$34.46	$31.76 - $37.71