Portolan Capital Management - GIBRALTAR INDS INC ownership

GIBRALTAR INDS INC's ticker is ROCK and the CUSIP is 374689107. A total of 233 filers reported holding GIBRALTAR INDS INC in Q4 2020. The put-call ratio across all filers is 0.30 and the average weighting 0.1%.

Quarter-by-quarter ownership
Portolan Capital Management ownership history of GIBRALTAR INDS INC
ValueSharesWeighting
Q1 2021$6,404,000
+25.6%
69,976
-1.3%
0.50%
+8.4%
Q4 2020$5,100,000
+85.3%
70,893
+67.8%
0.46%
+49.2%
Q3 2020$2,752,00042,2430.31%
Other shareholders
GIBRALTAR INDS INC shareholders Q4 2020
NameSharesValueWeighting ↓
Sagard Capital Partners Management Corp 1,519,313$22,121,0007.83%
Robotti & Company 485,951$7,075,0003.08%
Kendall Square Capital, LLC 250,163$3,642,0002.15%
Archer Capital Management, L.P. 347,424$5,058,0000.93%
BROADVIEW ADVISORS LLC 331,699$4,830,0000.68%
RBF Capital, LLC 140,000$2,038,0000.58%
MAINSTREAM INVESTMENT ADVISERS LLC 13,292$194,0000.12%
JBF Capital, Inc. 38,233$557,0000.10%
DALTON GREINER HARTMAN MAHER & CO 75,247$1,096,0000.08%
Independence Capital Asset Partners, LLC 30,541$445,0000.08%
View complete list of GIBRALTAR INDS INC shareholders