GIBRALTAR INDS INC

Ticker: ROCK CUSIP: 374689107 Class: EQTY

LOOMIS SAYLES & CO L P's Holding History (CIK: 0000312348)

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

Q1 2017

Shares 266,794 Value ($000) $10,992 Avg Close $41.84 Range $38.55 - $45.05

Q4 2016

Shares 187,497 Value ($000) $7,809 Avg Close $41.33 Range $34.54 - $48.05

Q3 2016

Shares 130,480 Value ($000) $4,847 Avg Close $36.62 Range $31.35 - $40.00

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2017	266,794	$10,992	$41.84	$38.55 - $45.05
Q4 2016	187,497	$7,809	$41.33	$34.54 - $48.05
Q3 2016	130,480	$4,847	$36.62	$31.35 - $40.00