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CIEN — CIENA CORP

Reported value held$33.41B
Funds holding (latest)57
SectorUtilities

Index member: S&P 500

Funds holding (Q2 2026)48
Institutional value$29.51B · 64.25M sh
New / Add / Cut / Exit1 / 28 / 19 / 4
Top-5 / Top-10 concentration64.4% / 77.8%
Institutional holdings change Reducing -6.3% (-4.34M sh)
Institutional value change Up +20.0%

As of Q2 2026, 48 SEC-registered investment managers reported holding CIEN (CIENA CORP) in their latest 13F filings, with a combined reported value of $29.51B across 64.25M shares. That is -6.3% by share count (-4.34M shares) versus the previous quarter, while reported value moved +20.0%. Ownership is concentrated: the five largest holders account for 64.4% of reported value and the top ten for 77.8%.

Compared with the prior quarter, 1 opened new positions, 28 added to existing stakes, 19 trimmed, 4 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.

CIEN is a constituent of the S&P 500 and is classified in the Utilities sector.

All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.

FundQuarterSharesValuePortfolio WeightChange
Fidelity Management & Research (FMR) history Q2 2026 19.11M $9.38B 0.45% Reduce
BlackRock Inc history Q2 2026 12.72M $6.24B 0.10% Reduce
Vanguard Group history Q4 2025 14.38M $3.36B 0.05% Reduce
Geode Capital Management history Q2 2026 3.37M $1.65B 0.09% Reduce
Bank of America Corp history Q2 2026 1.79M $877.41M 0.06% Reduce
Capital World Investors history Q2 2026 1.76M $861.23M 0.11% Add
Invesco Ltd history Q2 2026 1.73M $848.77M 0.07% Add
Norges Bank Investment Management history Q2 2026 1.70M $835.50M 0.08% Add
Arrowstreet Capital history Q2 2026 1.68M $822.68M 0.36% Add
Morgan Stanley history Q2 2026 1.63M $801.88M 0.04% Add
Citadel Advisors history Q2 2026 1.33M $651.74M 0.08% Add
Charles Schwab Investment Management history Q2 2026 1.25M $612.71M 0.08% Reduce
Northern Trust Corp history Q2 2026 1.22M $597.47M 0.07% Add
AQR Capital Management history Q2 2026 1.05M $507.24M 0.18% Add
Goldman Sachs Group history Q2 2026 986.61K $483.99M 0.04% Add
Wells Fargo & Co history Q2 2026 922.65K $452.62M 0.08% Add
Legal & General Investment Management America history Q2 2026 887.05K $435.15M 0.09% Add
BNY Mellon history Q2 2026 825.48K $404.95M 0.07% Reduce
Amundi US history Q2 2026 675.11K $331.18M 0.08% Add
Capital Research Global Investors history Q2 2026 656.55K $322.08M 0.05% Reduce

View all 57 fund holders →

New Positions (Q2 2026)

Fully Exited (vs previous quarter)

Fund Position History — shares by quarter (top 20 funds)

FundQ3 2021Q4 2021Q1 2022Q2 2022Q3 2022Q4 2022Q1 2023Q2 2023Q3 2023Q4 2023Q1 2024Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
Fidelity Management & Research (FMR) 7.19M 8.89M 8.82M 8.60M 8.61M 8.91M 8.80M 8.57M 8.94M 11.32M 19.14M 21.56M 21.66M 21.53M 21.31M 21.23M 21.16M 21.13M 21.21M 19.11M
BlackRock Inc — — — — — — — — — — — — 16.15M 17.10M 17.04M 17.07M 15.60M 16.67M 13.37M 12.72M
Geode Capital Management 2.12M 2.02M 2.00M 1.95M 1.94M 2.02M 2.08M 2.19M 2.23M 2.29M 2.34M 2.37M 2.41M 2.42M 2.50M 2.50M 2.54M 2.69M 4.07M 3.37M
Bank of America Corp 2.81M 2.96M 2.99M 3.55M 3.98M 3.63M 4.05M 3.98M 3.83M 2.00M 1.99M 2.49M 3.18M 3.23M 3.17M 3.50M 3.21M 2.16M 1.95M 1.79M
Capital World Investors — — 1.79M 2.23M 3.35M 3.34M 2.72M 2.72M 2.72M 3.51M 1.18M — — — 1.85M 1.71M 1.84M 1.87M 1.72M 1.76M
Invesco Ltd 1.42M 1.21M 778.87K 388.82K 356.37K 448.22K 319.80K 341.12K 310.39K 305.26K 286.83K 578.36K 402.18K 332.75K 332.62K 281.56K 1.24M 1.52M 1.53M 1.73M
Norges Bank Investment Management — — — — — 1.31M — — — 1.63M — 41.08K — 86.73K — 78.19K — 811.95K — 1.70M
Arrowstreet Capital — 8.65K — — — 10.60K — — — 15.89K 19.79K 111.41K 11.55K 529.55K 201.37K 50.30K 1.14M 2.24M 1.39M 1.68M
Morgan Stanley 1.11M 1.26M 658.92K 923.54K 1.04M 1.16M 1.01M 942.79K 1.38M 1.35M 1.58M 1.31M 1.17M 1.49M 1.53M 1.87M 1.74M 1.38M 1.56M 1.63M
Citadel Advisors 988.51K 1.92M 486.81K 755.73K 579.42K 1.30M 858.06K 1.28M 1.65M 443.45K 563.62K 318.48K 839.13K 1.06M 1.18M 541.46K 1.59M 1.31M 837.13K 1.33M
Charles Schwab Investment Management 1.07M 1.11M 909.88K 910.95K 919.96K 955.67K 971.21K 979.71K 930.62K 949.48K 940.52K 948.91K 955.52K 959.83K 952.80K 956.59K 941.77K 935.73K 1.27M 1.25M
Northern Trust Corp 1.28M 1.25M 1.21M 1.16M 1.13M 1.12M 1.10M 1.07M 1.06M 1.07M 904.78K 1.01M 981.09K 1.24M 1.21M 1.20M 1.18M 1.22M 1.19M 1.22M
AQR Capital Management 187.47K 143.53K 276.95K 477.25K 105.61K 51.80K 8.92K 64.07K 40.09K 135.95K 167.80K 886.35K 804.96K 595.18K 543.63K 1.22M 1.50M 1.41M 977.09K 1.05M
Goldman Sachs Group 515.75K 1.22M 1.04M 1.12M 970.54K 1.07M 731.54K 810.46K 467.26K 409.13K 313.24K 209.39K 207.46K 218.94K 222.05K 498.83K 289.65K 445.36K 773.26K 986.61K
Wells Fargo & Co 23.50K 190.00K 228.94K 190.26K 100.22K 94.97K 115.42K 102.56K 128.48K 113.92K 191.01K 226.01K 361.60K 256.65K 237.71K 239.42K 183.41K 289.87K 352.44K 922.65K
Legal & General Investment Management America 373.50K 375.69K 381.48K 375.81K 364.28K 360.17K 368.56K 364.20K 362.53K 351.91K 322.76K 305.50K 307.44K 291.95K 295.56K 296.74K 273.88K 510.45K 648.38K 887.05K
BNY Mellon 2.94M 2.50M 2.71M 2.64M 2.61M 2.60M 1.54M 1.48M 1.42M 1.39M 1.32M 1.50M 1.30M 1.27M 1.18M 1.14M 1.06M 1.12M 926.86K 825.48K
Amundi US 24.26K 22.18K 28.95K 27.24K 637.60K 1.58M 2.01M 2.55M 2.20M 1.62M 1.21M 9.38K 6.75K 8.05K 34.03K 31.46K 284.78K 483.71K 431.23K 675.11K
Capital Research Global Investors — — — — — — — — — — — — — — — — — — 2.75M 656.55K
MFS Investment Management — — — — — — — — — — — — — — — — 161.62K 607.39K 582.67K 641.02K

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