Ciena Corporation
US ˙ NYSE ˙ US1717793095

SecurityCIEN / Ciena Corporation
InstitutionLazard Asset Management Llc
Latest Disclosed Ownership1,968 shares
Latest Disclosed Value $ 764,037
Lazard Asset Management Llc reports 77.52% decrease in ownership of CIEN / Ciena Corporation

On May 15, 2026 - Lazard Asset Management Llc filed a 13F-HR form disclosing ownership of 1,968 shares of Ciena Corporation (US:CIEN) valued at $764,037 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 8,756 shares of Ciena Corporation. This represents a change in shares of -77.52% during the quarter. The current value of the position is $960,797 USD.

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 1,968 -6,788 -77.52 764 -62.68 0.0007
2026-02-17 2025-12-31 13F CIENA COM NEW 171779309 8,756 6,222 245.54 2,048 454.74 0.0035
2025-11-14 2025-09-30 13F CIENA COM NEW 171779309 2,534 550 27.72 369 0.0005
2025-08-14 2025-06-30 13F CIENA Common Stock 171779309 1,984 -796 -28.63 0 0.0002
2025-05-15 2025-03-31 13F CIENA Common Stock 171779309 2,780 1,634 142.58 0 0.0003
2025-02-14 2024-12-31 13F CIENA Common Stock 171779309 1,146 1,146 0 0.0001
2024-11-14 2024-09-30 13F CIENA Common Stock 171779309 0 -225,139 -100.00 0 -100.00
2024-08-14 2024-06-30 13F CIENA Common Stock 171779309 225,139 -24,447 -9.80 11 -16.67 0.0136
2024-07-09 2024-03-31 13F/A-1 CIENA Common Stock 171779309 249,586 -423,049 -62.89 12 -60.00 0.0150
2024-05-14 2024-03-31 13F CIENA Common Stock 171779309 249,586 -423,049 12 0.0150
2024-02-14 2023-12-31 13F CIENA Common Stock 171779309 672,635 38,628 6.09 30 3.45 0.0383
2023-11-14 2023-09-30 13F CIENA Common Stock 171779309 634,007 -47,302 -6.94 30 3.57 0.0408
2023-08-15 2023-06-30 13F CIENA Common Stock 171779309 681,309 117,862 20.92 29 -3.45 0.0356
2023-05-15 2023-03-31 13F CIENA Common Stock 171779309 563,447 38,441 7.32 30 -99.89 0.0388
2023-02-15 2022-12-31 13F CIENA Common Stock 171779309 525,006 -44,336 -7.79 26,764 16.27 0.0369
2022-11-14 2022-09-30 13F CIENA Common Stock 171779309 569,342 -50,240 -8.11 23,018 -18.70 0.0336
2022-08-09 2022-06-30 13F CIENA Common Stock 171779309 619,582 -191,411 -23.60 28,314 -42.42 0.0383
2022-05-13 2022-03-31 13F CIENA Common Stock 171779309 810,993 -21,413 -2.57 49,170 -23.26 0.0570
2022-02-09 2021-12-31 13F CIENA Common Stock 171779309 832,406 -255,633 -23.49 64,070 14.68 0.0682
2021-11-15 2021-09-30 13F CIENA Common Stock 171779309 1,088,039 31,082 2.94 55,870 -7.08 0.0630
2021-08-12 2021-06-30 13F CIENA Common Stock 171779309 1,056,957 114,959 12.20 60,130 16.65 0.0675
2021-05-14 2021-03-31 13F CIENA Common Stock 171779309 941,998 228,621 32.05 51,546 36.72 0.0624
2021-02-11 2020-12-31 13F CIENA Common Stock 171779309 713,377 64,978 10.02 37,701 46.50 0.0476
2020-11-13 2020-09-30 13F CIENA Common Stock 171779309 648,399 691 0.11 25,734 -26.64 0.0362
2020-08-13 2020-06-30 13F CIENA Common Stock 171779309 647,708 23,866 3.83 35,079 41.25 0.0539
2020-05-14 2020-03-31 13F CIENA Common Stock 171779309 623,842 16,857 2.78 24,835 -4.16 0.0455
2020-02-13 2019-12-31 13F CIENA Common Stock 171779309 606,985 102,639 20.35 25,912 30.97 0.0370
2019-11-14 2019-09-30 13F CIENA Common Stock 171779309 504,346 180,771 55.87 19,785 48.67 0.0325
2019-08-14 2019-06-30 13F CIENA Common Stock 171779309 323,575 116,445 56.22 13,308 72.07 0.0216
2019-08-28 2019-03-31 13F/A-1 CIENA Common Stock 171779309 207,130 -28,553 -12.12 7,734 -3.23 0.0127
2019-05-13 2019-03-31 13F CIENA Common Stock 171779309 207,130 -28,553 7,734
2019-08-28 2018-12-31 13F/A-1 CIENA Common Stock 171779309 235,683 -23,312 -9.00 7,992 -1.22 0.0147
2019-02-13 2018-12-31 13F CIENA Common Stock 171779309 235,683 -23,312 7,992
2019-08-30 2018-09-30 13F/A-1 CIENA Common Stock 171779309 258,995 -331,650 -56.15 8,091 -48.32 0.0131
2018-11-13 2018-09-30 13F CIENA Common Stock 171779309 258,995 -331,650 8,091
2019-08-30 2018-06-30 13F/A-1 CIENA Common Stock 171779309 590,645 -49,611 -7.75 15,657 -5.58 0.0272
2018-08-13 2018-06-30 13F CIENA Common Stock 171779309 590,645 -49,611 15,657
2019-08-28 2018-03-31 13F/A-1 CIENA Common Stock 171779309 640,256 -28,110 -4.21 16,582 18.54 0.0283
2018-05-14 2018-03-31 13F CIENA Common Stock 171779309 640,256 -28,110 16,582
2019-08-28 2017-12-31 13F/A-1 CIENA Common Stock 171779309 668,366 58,751 9.64 13,988 4.44 0.0239
2018-02-13 2017-12-31 13F CIENA Common Stock 171779309 668,366 58,751 13,988
2019-08-19 2017-09-30 13F/A-1 CIENA Common Stock 171779309 609,615 325,974 114.92 13,393 88.74 0.0242
2017-11-13 2017-09-30 13F CIENA Common Stock 171779309 609,615 326,453 13,393
2019-08-19 2017-06-30 13F/A-1 CIENA Common Stock 171779309 283,641 -115,011 -28.85 7,096 -24.61 0.0133
2017-08-11 2017-06-30 13F CIENA Common Stock 171779309 283,162 -115,490 7,084
2019-08-13 2017-03-31 13F/A-1 CIENA Common Stock 171779309 398,652 149,827 60.21 9,412 54.98 0.0178
2017-05-12 2017-03-31 13F CIENA Common Stock 171779309 398,407 149,827 9,406
2019-07-30 2016-12-31 13F/A-1 CIENA Common Stock 171779309 248,825 -236,664 -48.75 6,073 -42.62 0.0124
2017-02-13 2016-12-31 13F CIENA Common Stock 171779309 248,580 -236,465 6,067
2019-08-07 2016-09-30 13F/A-1 CIENA Common Stock 171779309 485,489 -34,100 -6.56 10,583 8.63 0.0210
2016-11-14 2016-09-30 13F CIENA Common Stock 171779309 485,045 -34,100 10,573
2019-07-29 2016-06-30 13F/A-1 CIENA Common Stock 171779309 519,589 99,738 23.76 9,742 22.00 0.0206
2016-08-15 2016-06-30 13F CIENA Common Stock 171779309 519,145 99,294 9,733
2019-07-25 2016-03-31 13F/A-1 CIENA Common Stock 171779309 419,851 419,851 124,116.27 7,985 132,983.33 0.0174
2016-05-12 2016-03-31 13F CIENA Common Stock 171779309 419,460 419,460 7,978
2015-11-13 2015-09-30 13F CIENA Common Stock 171779309 0 0 0 0.0000
2015-06-09 2015-03-31 13F/A-1 CIENA Common Stock 171779309 0 -338 -100.00 0 -100.00
2019-08-29 2014-12-31 13F/A-3 CIENA Common Stock 171779309 338 -4,526 -93.05 6 -92.59 0.0000
2015-06-09 2014-12-31 13F/A-2 CIENA Common Stock 171779309 338 0 6 0.0000
2015-02-12 2014-12-31 13F CIENA Common Stock 171779309 338 6
2014-11-07 2014-09-30 13F CIENA Common Stock 171779309 4,864 -1,336 -21.55 81 -39.55 0.0002
2014-08-12 2014-06-30 13F CIENA Common Stock 171779309 6,200 0 0.00 134 -4.29 0.0003
2014-05-12 2014-03-31 13F CIENA Common Stock 171779309 6,200 0 0.00 140 -5.41 0.0003
2014-02-14 2013-12-31 13F CIENA Common Stock 171779309 6,200 0 0.00 148 -3.90 0.0003
2014-01-13 2013-09-30 13F/A-1 CIENA Common Stock 171779309 6,200 0 0.00 154 28.33 0.0004
2013-11-13 2013-09-30 13F CIENA Common Stock 171779309 6,200 154
2013-08-13 2013-06-30 13F CIENA Common Stock 171779309 6,200 6,200 120 0.0003
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.