Ciena Corporation
MX ˙ BMV ˙ US1717793095
SecurityMX:CIEN / Ciena Corporation
InstitutionJustInvest LLC
Latest Disclosed Ownership22,040 shares
Latest Disclosed Value $ 8,556,589
JustInvest LLC reports 7.92% increase in ownership of CIEN / Ciena Corporation

On May 14, 2026 - JustInvest LLC filed a 13F-HR form disclosing ownership of 22,040 shares of Ciena Corporation (MX:CIEN) valued at $8,556,589 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 20,423 shares of Ciena Corporation. This represents a change in shares of 7.92% 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)
2026-05-14 2026-03-31 13F CIENA COM NEW 171779309 22,040 1,617 7.92 8,557 79.15 0.0840
2026-02-13 2025-12-31 13F CIENA COM NEW 171779309 20,423 1,032 5.32 4,776 69.12 0.0466
2025-10-31 2025-09-30 13F CIENA COM NEW 171779309 19,391 -278 -1.41 2,825 76.61 0.0289
2025-07-25 2025-06-30 13F CIENA COM NEW 171779309 19,669 2,920 17.43 1,600 58.00 0.0181
2025-05-14 2025-03-31 13F CIENA COM NEW 171779309 16,749 1,998 13.54 1,012 -19.10 0.0149
2025-02-10 2024-12-31 13F CIENA COM NEW 171779309 14,751 826 5.93 1,251 45.97 0.0189
2024-11-12 2024-09-30 13F CIENA COM NEW 171779309 13,925 814 6.21 858 35.82 0.0138
2024-08-12 2024-06-30 13F CIENA COM NEW 171779309 13,111 156 1.20 632 -1.41 0.0120
2024-05-09 2024-03-31 13F CIENA COM NEW 171779309 12,955 -4,920 -27.52 641 -20.40 0.0137
2024-02-08 2023-12-31 13F CIENA COM NEW 171779309 17,875 9,554 114.82 805 104.58 0.0209
2023-11-08 2023-09-30 13F CIENA COM NEW 171779309 8,321 300 3.74 393 15.59 0.0118
2023-07-28 2023-06-30 13F CIENA COM NEW 171779309 8,021 -10,655 -57.05 341 -65.31 0.0104
2023-05-10 2023-03-31 13F CIENA COM NEW 171779309 18,676 10,270 122.17 981 128.97 0.0341
2023-02-10 2022-12-31 13F CIENA COM NEW 171779309 8,406 309 3.82 429 30.89 0.0177
2022-11-14 2022-09-30 13F CIENA COM NEW 171779309 8,097 -1,032 -11.30 327 -21.58 0.0148
2022-08-12 2022-06-30 13F/A-1 CIENA COM NEW 171779309 9,129 -1,658 -15.37 417 -36.24 0.0193
2022-08-09 2022-06-30 13F CIENA COM NEW 171779309 9,129 -1,658 417 0.0193
2022-05-16 2022-03-31 13F CIENA COM NEW 171779309 10,787 1,615 17.61 654 -7.37 0.0317
2022-02-23 2021-12-31 13F CIENA COM NEW 171779309 9,172 2,644 40.50 706 110.75 0.0416
2021-11-09 2021-09-30 13F CIENA COM NEW 171779309 6,528 -4,686 -41.79 335 -47.49 0.0301
2021-08-11 2021-06-30 13F/A-1 CIENA COM NEW 171779309 11,214 -7,456 -39.94 638 -37.57 0.0668
2021-07-21 2021-06-30 13F CIENA COM NEW 171779309 18,670 0 1,022 0.1556
2021-04-28 2021-03-31 13F CIENA COM NEW 171779309 18,670 -1,040 -5.28 1,022 -1.92 0.1547
2021-01-20 2020-12-31 13F/A-1 CIENA COM NEW 171779309 19,710 -1,004 -4.85 1,042 26.76 0.2267
2021-01-19 2020-12-31 13F CIENA COM NEW 171779309 19,710 -1,004 57 166,403.9236
2020-10-26 2020-09-30 13F CIENA COM NEW 171779309 20,714 -4,084 -16.47 822 -38.79 0.2306
2020-07-27 2020-06-30 13F CIENA COM NEW 171779309 24,798 -13,556 -35.34 1,343 -12.05 0.6092
2020-05-13 2020-03-31 13F CIENA COM NEW 171779309 38,354 38,354 1,527 0.8904
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.