Ciena Corporation
MX ˙ BMV ˙ US1717793095
SecurityMX:CIEN / Ciena Corporation
InstitutionAdvisors Asset Management, Inc.
Latest Disclosed Ownership5,899 shares
Latest Disclosed Value $ 2,290,169
Advisors Asset Management, Inc. reports 9.61% decrease in ownership of CIEN / Ciena Corporation

On May 15, 2026 - Advisors Asset Management, Inc. filed a 13F-HR form disclosing ownership of 5,899 shares of Ciena Corporation (MX:CIEN) valued at $2,290,169 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 6,526 shares of Ciena Corporation. This represents a change in shares of -9.61% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F CIENA COM NEW 171779309 5,899 -627 -9.61 2,290 50.07 0.0380
2026-02-12 2025-12-31 13F CIENA COM NEW 171779309 6,526 -73 -1.11 1,526 58.79 0.0256
2025-11-06 2025-09-30 13F CIENA COM NEW 171779309 6,599 -103 -1.54 961 76.33 0.0163
2025-08-12 2025-06-30 13F CIENA COM NEW 171779309 6,702 1,593 31.18 545 76.95 0.0098
2025-05-15 2025-03-31 13F CIENA COM NEW 171779309 5,109 1,572 44.44 309 3.01 0.0058
2025-02-10 2024-12-31 13F CIENA COM NEW 171779309 3,537 3,537 300 0.0055
2024-11-08 2024-09-30 13F CIENA COM NEW 171779309 0 -628 -100.00 0 -100.00
2024-08-14 2024-06-30 13F CIENA COM NEW 171779309 628 -55 -8.05 30 -9.09 0.0006
2024-05-14 2024-03-31 13F CIENA COM NEW 171779309 683 -8 -1.16 34 6.45 0.0006
2024-02-14 2023-12-31 13F CIENA COM NEW 171779309 691 -7 -1.00 31 -3.12 0.0006
2023-11-14 2023-09-30 13F CIENA COM NEW 171779309 698 134 23.76 33 39.13 0.0007
2023-08-14 2023-06-30 13F CIENA COM NEW 171779309 564 564 24 0.0005
2023-02-13 2022-12-31 13F CIENA COM NEW 171779309 0 -3,730 -100.00 0 -100.00
2022-11-08 2022-09-30 13F CIENA COM NEW 171779309 3,730 -38 -1.01 151 -12.21 0.0032
2022-08-08 2022-06-30 13F CIENA COM NEW 171779309 3,768 -3,071 -44.90 172 -58.55 0.0033
2022-05-17 2022-03-31 13F CIENA COM NEW 171779309 6,839 -4,881 -41.65 415 -53.99 0.0064
2022-02-15 2021-12-31 13F CIENA COM NEW 171779309 11,720 -4,922 -29.58 902 5.50 0.0129
2021-11-12 2021-09-30 13F CIENA COM NEW 171779309 16,642 -4,919 -22.81 855 -30.32 0.0130
2021-07-30 2021-06-30 13F CIENA COM NEW 171779309 21,561 -965 -4.28 1,227 -0.49 0.0181
2021-05-07 2021-03-31 13F CIENA COM NEW 171779309 22,526 -2,424 -9.72 1,233 -6.52 0.0192
2021-02-12 2020-12-31 13F CIENA COM NEW 171779309 24,950 7,792 45.41 1,319 93.69 0.0218
2020-11-16 2020-09-30 13F CIENA COM NEW 171779309 17,158 5,546 47.76 681 8.27 0.0126
2020-08-12 2020-06-30 13F CIENA COM NEW 171779309 11,612 6,277 117.66 629 196.70 0.0122
2020-05-15 2020-03-31 13F CIENA COM NEW 171779309 5,335 339 6.79 212 -0.47 0.0050
2020-05-20 2019-12-31 13F/A-1 CIENA COM NEW 171779309 4,996 3,281 191.31 213 217.91 0.0037
2020-02-14 2019-12-31 13F CIENA COM NEW 171779309 4,996 3,281 213 1,885.2514
2019-11-14 2019-09-30 13F CIENA COM NEW 171779309 1,715 657 62.10 67 52.27 0.0012
2019-11-14 2019-06-30 13F/A-1 CIENA COM NEW 171779309 1,058 -7,238 -87.25 44 -85.81 0.0008
2019-08-14 2019-06-30 13F CIENA COM NEW 171779309 1,058 -7,238 44
2019-05-15 2019-03-31 13F CIENA COM NEW 171779309 8,296 -9,632 -53.73 310 -49.01 0.0055
2019-02-06 2018-12-31 13F/A-1 CIENA COM NEW 171779309 17,928 -14,716 -45.08 608 -40.39 0.0122
2019-01-31 2018-12-31 13F CIENA COM NEW 171779309 17,928 -14,716 608
2018-11-15 2018-09-30 13F CIENA COM NEW 171779309 32,644 -4,636 -12.44 1,020 3.24 0.0167
2018-08-22 2018-06-30 13F/A-1 CIENA COM NEW 171779309 37,280 -1,157 -3.01 988 10.89 0.0168
2018-08-15 2018-06-30 13F CIENA COM NEW 171779309 52,204 13,767 988
2018-05-15 2018-03-31 13F CIENA COM NEW 171779309 38,437 -1,377 -3.46 891 6.96 0.0149
2018-02-13 2017-12-31 13F CIENA COM NEW 171779309 39,814 -1,613 -3.89 833 -8.46 0.0137
2017-11-07 2017-09-30 13F CIENA COM NEW 171779309 41,427 14,452 53.58 910 34.81 0.0152
2017-08-02 2017-06-30 13F CIENA COM NEW 171779309 26,975 16,104 148.14 675 162.65 0.0113
2017-05-02 2017-03-31 13F CIENA COM NEW 171779309 10,871 7,771 250.68 257 277.94 0.0043
2016-10-31 2016-09-30 13F CIENA COM NEW 171779309 3,100 -7,413 -70.51 68 -65.48 0.0011
2016-08-08 2016-06-30 13F CIENA COM NEW 171779309 10,513 -2,948 -21.90 197 -23.05 0.0032
2016-05-16 2016-03-31 13F CIENA COM NEW 171779309 13,461 -8,678 -39.20 256 -44.10 0.0043
2016-02-10 2015-12-31 13F CIENA COM NEW 171779309 22,139 -4,060 -15.50 458 -15.65 0.0073
2015-11-16 2015-09-30 13F CIENA COM NEW 171779309 26,199 -7,828 -23.01 543 -32.63 0.0087
2015-08-11 2015-06-30 13F CIENA COM NEW 171779309 34,027 -3,535 -9.41 806 11.17 0.0111
2015-05-13 2015-03-31 13F CIENA COM NEW 171779309 37,562 -2,325 -5.83 725 -6.33 0.0097
2015-02-05 2014-12-31 13F CIENA COM NEW 171779309 39,887 5,547 16.15 774 34.84 0.0104
2014-11-13 2014-09-30 13F CIENA COM NEW 171779309 34,340 7,501 27.95 574 -1.20 0.0079
2014-08-14 2014-06-30 13F CIENA COM NEW 171779309 26,839 5,030 23.06 581 17.14 0.0081
2014-05-15 2014-03-31 13F CIENA COM NEW 171779309 21,809 7,908 56.89 496 48.95 0.0075
2014-02-03 2013-12-31 13F CIENA COM NEW 171779309 13,901 5,904 73.83 333 66.50 0.0054
2013-11-15 2013-09-30 13F CIENA COM NEW 171779309 7,997 4,697 142.33 200 212.50 0.0036
2013-08-14 2013-06-30 13F CIENA COM NEW 171779309 3,300 3,300 64 0.0012
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.