13F Insight
DOSSIER · 13F Holders · Q1 2026Technology · Miscellaneous Electrical Machinery, Equipment & SuppliesHigh-convictionMulti-bagger
ATKR

ATKORE INC

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

CUSIP 047649108·Miscellaneous Electrical Machinery, Equipment & Supplies·320 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 2.5%
vs prior quarter
13F value held
$1.2B
73.0% inst. owned
of float
Holders
320
-126 QoQ
filers reporting
Activity
+86 / −84
+897 added · −892 reduced
this quarter
Concentration
12.83%
Gates Capital Management, Inc. #1
top holder share
AI Holders Summary · Q1 2026

320 institutions reported ATKR in Q1 2026. Gates Capital Management, Inc. leads at 12.8% of the visible book. -126 net institutions QoQ — distribution reading.

Top holders

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

#HolderValueShares% port.Quarter
01
Gates Capital Management, Inc.
CIK 0001312908
$158M2.7M4.32%Q1 202602
BlackRock, Inc.
CIK 0002012383
$155M2.6M0.00%Q1 202603
Vanguard Portfolio Management
CIK 0002100121
$123M2.1M0.01%Q1 202604
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$89M1.5M0.00%Q1 202605
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$85M1.4M0.04%Q1 202606
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$72M1.2M0.01%Q1 202607
FIRST TRUST ADVISORS LP
CIK 0001125816· Index
$72M1.2M0.05%Q1 202608
Coliseum Capital Management, LLC
CIK 0001409751
$56M947K4.57%Q1 202609
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$50M855K0.00%Q1 202610
STATE STREET CORP
CIK 0000093751
$49M835K0.00%Q1 202611
EARNEST PARTNERS LLC
CIK 0001102578
$46M778K0.19%Q1 202612
Hill City Capital, LP
CIK 0001837343
$43M728K1.53%Q1 202613
HARDING LOEVNER LP
CIK 0000928196
$42M705K0.43%Q1 202614
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
$41M698K0.02%Q1 202615
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.
CIK 0001705339
$31M533K0.04%Q1 202616
BANK OF AMERICA CORP /DE/
CIK 0000070858
$27M462K0.00%Q1 202617
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$25M418K0.00%Q1 202618
GENDELL JEFFREY L
CIK 0001056581
$24M400K0.32%Q1 202619
VICTORY CAPITAL MANAGEMENT INC
CIK 0001040188
$22M379K0.01%Q1 202620
LONDON CO OF VIRGINIA
CIK 0001259887
$22M378K0.14%Q1 2026
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