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

CIENA CORP

1,110 institutions still hold CIENA CORP as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 171779309·Telephone & Telegraph Apparatus·1,110 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 2.8%
vs prior quarter
13F value held
$35.1B
53.0% inst. owned
of float
Holders
1,110
+6 QoQ
filers reporting
Activity
+22 / −65
+927 added · −914 reduced
this quarter
Concentration
23.49%
FMR LLC #1
top holder share
AI Holders Summary · Q1 2026

1,110 institutions reported CIEN in Q1 2026. FMR LLC leads at 23.5% of the visible book. +6 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
FMR LLC
CIK 0000315066
$8.2B21.2M0.43%Q1 202602
BlackRock, Inc.
CIK 0002012383
$5.2B13.4M0.09%Q1 202603
JPMORGAN CHASE & CO
CIK 0000019617
$3.7B10.2M0.24%Q1 202604
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$3.6B9.2M0.09%Q1 202605
Vanguard Portfolio Management
CIK 0002100121· Index
$2.9B7.4M0.15%Q1 202606
STATE STREET CORP
CIK 0000093751
$2.4B6.3M0.08%Q1 202607
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$1.6B4.1M0.10%Q1 202608
Capital Research Global Investors
CIK 0001422848
$1.1B2.8M0.17%Q1 202609
BANK OF AMERICA CORP /DE/
CIK 0000070858
$759M2.0M0.06%Q1 202610
Capital World Investors
CIK 0001422849
$670M1.7M0.09%Q1 202611
MORGAN STANLEY
CIK 0000895421
$606M1.6M0.04%Q1 202612
Invesco Ltd.
CIK 0000914208
$594M1.5M0.09%Q1 202613
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$559M1.4M0.06%Q1 202614
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
$539M1.4M0.29%Q1 202615
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$494M1.3M0.08%Q1 202616
VOYA INVESTMENT MANAGEMENT LLC
CIK 0001068837
$468M1.2M0.49%Q1 202617
NORTHERN TRUST CORP
CIK 0000073124· Index
$461M1.2M0.06%Q1 202618
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$445M1.1M0.09%Q1 202619
BNP Paribas Asset Management Holding S.A.
CIK 0001520354
$397M1.0M0.46%Q1 202620
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$393M1.0M0.05%Q1 2026
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