GIBRALTAR INDS INC

Ticker: ROCK CUSIP: 374689107 Class: EQTY

Portolan Capital Management, LLC's Holding History (CIK: 0001350290)

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

Q1 2021

Shares 69,976 Value ($000) $6,404 Avg Close $91.76 Range $73.29 - $103.02

Q4 2020

Shares 70,893 Value ($000) $5,100 Avg Close $66.77 Range $56.97 - $74.00

Q3 2020

Shares 42,243 Value ($000) $2,752 Avg Close $59.00 Range $45.82 - $69.64

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	69,976	$6,404	$91.76	$73.29 - $103.02
Q4 2020	70,893	$5,100	$66.77	$56.97 - $74.00
Q3 2020	42,243	$2,752	$59.00	$45.82 - $69.64