13F Insight
DOSSIER · 13F Holders · Q1 2026Technology · Telephone & Telegraph ApparatusMost-boughtAI cap-ex
ADTN

ADTRAN HOLDINGS INC

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

CUSIP 00486H105·Telephone & Telegraph Apparatus·234 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 7.9%
vs prior quarter
13F value held
$563M
60.0% inst. owned
of float
Holders
234
+106 QoQ
filers reporting
Activity
+94 / −82
+849 added · −778 reduced
this quarter
Concentration
17.52%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

234 institutions reported ADTN in Q1 2026. BlackRock, Inc. leads at 17.5% of the visible book. +106 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
$99M7.8M0.00%Q1 202602
Vanguard Portfolio Management
CIK 0002100121
$60M4.8M0.00%Q1 202603
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$43M3.4M0.00%Q1 202604
ROYCE & ASSOCIATES LP
CIK 0000906304
$39M3.1M0.39%Q1 202605
DnB Asset Management AS
CIK 0001456670
$39M3.1M0.14%Q1 202606
STATE STREET CORP
CIK 0000093751
$30M2.4M0.00%Q1 202607
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
CIK 0001644956
$25M2.0M0.08%Q1 202608
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$24M1.9M0.01%Q1 202609
MORGAN STANLEY
CIK 0000895421
$23M1.8M0.00%Q1 202610
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$23M1.8M0.00%Q1 202611
Divisar Capital Management LLC
CIK 0001645721
$22M1.8M5.67%Q1 202612
JPMORGAN CHASE & CO
CIK 0000019617
$19M1.5M0.00%Q1 202613
First Eagle Investment Management, LLC
CIK 0001325447
$17M1.4M0.03%Q1 202614
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$17M1.3M0.00%Q1 202615
Shannon River Fund Management LLC
CIK 0001301050
$15M1.2M2.93%Q1 202616
Boston Partners
CIK 0001386060
$15M1.2M0.02%Q1 202617
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$14M1.1M0.01%Q1 202618
SEI INVESTMENTS CO
CIK 0000350894
$14M1.1M0.01%Q1 202619
NEEDHAM INVESTMENT MANAGEMENT LLC
CIK 0001167212
$13M1.4M0.79%Q4 202520
Invesco Ltd.
CIK 0000914208
$12M991K0.00%Q1 2026
Page 1 of 12
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