13F Insight
DOSSIER · 13F Holders · Q1 2026Basic Materials · Steel Works, Blast Furnaces & Rolling & Finishing MillsCyclicalNet sold
ROCK

GIBRALTAR INDS INC

246 institutions still hold GIBRALTAR INDS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 374689107·Steel Works, Blast Furnaces & Rolling & Finishing Mills·246 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 3.8%
vs prior quarter
13F value held
$1000M
66.0% inst. owned
of float
Holders
246
-83 QoQ
filers reporting
Activity
+14 / −32
+842 added · −692 reduced
this quarter
Concentration
20.13%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

246 institutions reported ROCK in Q1 2026. BlackRock, Inc. leads at 20.1% of the visible book. -83 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$201M5.0M0.00%Q1 202602
FMR LLC
CIK 0000315066
$177M4.4M0.01%Q1 202603
ALLIANCEBERNSTEIN L.P.
CIK 0001109448
$109M2.2M0.04%Q1 202604
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$68M1.7M0.01%Q1 202605
STATE STREET CORP
CIK 0000093751
$54M1.3M0.00%Q1 202606
Vanguard Portfolio Management
CIK 0002100121
$53M1.3M0.00%Q1 202607
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$53M1.3M0.00%Q1 202608
BARROW HANLEY MEWHINNEY & STRAUSS LLC
CIK 0000313028
$47M1.2M0.15%Q1 202609
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$31M778K0.00%Q1 202610
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.
CIK 0001705339
$30M742K0.04%Q1 202611
FRONTIER CAPITAL MANAGEMENT CO LLC
CIK 0000351173
$27M688K0.28%Q1 202612
Boston Partners
CIK 0001386060
$27M687K0.03%Q1 202613
FIRST WILSHIRE SECURITIES MANAGEMENT INC
CIK 0000732847
$20M500K4.49%Q1 202614
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$18M440K0.00%Q1 202615
SEGALL BRYANT & HAMILL, LLC
CIK 0001006378
$17M431K0.25%Q1 202616
D. E. Shaw & Co., Inc.
CIK 0001009207
$16M320K0.01%Q4 202517
MORGAN STANLEY
CIK 0000895421
$14M362K0.00%Q1 202618
PALISADE CAPITAL MANAGEMENT, LP
CIK 0001009006
$14M359K0.48%Q1 202619
NORTHERN TRUST CORP
CIK 0000073124· Index
$13M334K0.00%Q1 202620
ROYCE & ASSOCIATES LP
CIK 0000906304
$12M289K0.11%Q1 2026
Page 1 of 13
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