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CIEN Institutional Ownership

Top institutional (13F) holders of CIEN and activist (13D/G) positions, sourced from SEC EDGAR.

Institutional owners
47
Institutional value
$50.79B
Top holder
FMR LLC

Top holders

HolderFiledValue
FMR LLCinvestment advisorAug 13, 2026$9.38B
BlackRock, Inc.holding companyAug 7, 2026$6.24B
JPMORGAN CHASE & COinvestment advisorAug 12, 2026$5.37B
Vanguard Capital Managementhedge fundAug 13, 2026$4.53B
Vanguard Portfolio Managementhedge fundAug 13, 2026$3.77B
STATE STREET CORPinvestment advisorAug 7, 2026$3.28B
PRICE T ROWE ASSOCIATES INC /MD/investment advisorAug 14, 2026$2.00B
GEODE CAPITAL MANAGEMENT, LLCinvestment advisorAug 12, 2026$1.65B
JANE STREET GROUP, LLCholding companyAug 14, 2026$1.06B
SUSQUEHANNA INTERNATIONAL GROUP, LLPinvestment advisorAug 14, 2026$959.11M
BANK OF AMERICA CORP /DE/investment advisorAug 14, 2026$877.41M
Capital World Investorsinvestment advisorAug 12, 2026$861.23M
Invesco Ltd.investment advisorAug 14, 2026$848.77M
Norges BankotherAug 12, 2026$835.50M
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPinvestment advisorAug 13, 2026$822.68M
MORGAN STANLEYinvestment advisorAug 13, 2026$801.88M
CITADEL ADVISORS LLCinvestment advisorAug 14, 2026$651.74M
CHARLES SCHWAB INVESTMENT MANAGEMENT INCinvestment advisorAug 14, 2026$612.71M
NORTHERN TRUST CORPinvestment advisorAug 13, 2026$597.47M
Dimensional Fund Advisors LPhedge fundAug 11, 2026$565.63M
AQR CAPITAL MANAGEMENT LLCinvestment advisorAug 14, 2026$507.24M
GOLDMAN SACHS GROUP INCinvestment advisorAug 14, 2026$483.99M
WELLS FARGO & COMPANY/MNinvestment advisorAug 14, 2026$452.62M
Bank of New York Mellon Corpholding companyAug 6, 2026$404.95M
Capital Research Global Investorsinvestment advisorAug 12, 2026$322.08M

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Source: SEC EDGAR Schedule 13D / 13G and 13F filings.