13F Insight
DOSSIER · 13F Holders · Q1 2026Basic Materials · Steel Pipe & TubesCheap mega-capRe-rated
ATI

ATI INC

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

CUSIP 01741R102·Steel Pipe & Tubes·690 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 9.5%
vs prior quarter
13F value held
$11.7B
75.0% inst. owned
of float
Holders
690
+64 QoQ
filers reporting
Activity
+88 / −44
+771 added · −670 reduced
this quarter
Concentration
20.39%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

690 institutions reported ATI in Q1 2026. BlackRock, Inc. leads at 20.4% of the visible book. +64 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$2.4B16.4M0.04%Q1 202602
Capital Research Global Investors
CIK 0001422848
$896M6.2M0.14%Q1 202603
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$891M6.1M0.02%Q1 202604
Capital International Investors
CIK 0001562230
$855M5.9M0.20%Q1 202605
Vanguard Portfolio Management
CIK 0002100121
$847M5.8M0.04%Q1 202606
Capital World Investors
CIK 0001422849
$831M5.7M0.11%Q1 202607
STATE STREET CORP
CIK 0000093751
$783M5.4M0.03%Q1 202608
FMR LLC
CIK 0000315066
$763M5.2M0.04%Q1 202609
Invesco Ltd.
CIK 0000914208
$561M3.9M0.09%Q1 202610
VIKING GLOBAL INVESTORS LP
CIK 0001103804
$485M3.3M1.36%Q1 202611
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$429M2.9M0.03%Q1 202612
Point72 Asset Management, L.P.
CIK 0001603466
$283M1.9M0.36%Q1 202613
MORGAN STANLEY
CIK 0000895421
$243M1.7M0.01%Q1 202614
D. E. Shaw & Co., Inc.
CIK 0001009207
$234M2.0M0.13%Q4 202515
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$230M1.6M0.03%Q1 202616
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$218M1.5M0.03%Q1 202617
UBS Group AG
CIK 0001610520
$206M1.4M0.03%Q1 202618
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$199M1.4M0.04%Q1 202619
BANK OF AMERICA CORP /DE/
CIK 0000070858
$199M1.4M0.01%Q1 202620
DENDUR CAPITAL LP
CIK 0001782124
$187M1.3M13.68%Q1 2026
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