Ciena Corporation
MX ˙ BMV ˙ US1717793095
SecurityMX:CIEN / Ciena Corporation
InstitutionSignaturefd, Llc
Latest Disclosed Ownership6,054 shares
Latest Disclosed Value $ 2,350,344
Signaturefd, Llc reports 23.75% increase in ownership of CIEN / Ciena Corporation

On April 7, 2026 - Signaturefd, Llc filed a 13F-HR form disclosing ownership of 6,054 shares of Ciena Corporation (MX:CIEN) valued at $2,350,344 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 4,892 shares of Ciena Corporation. This represents a change in shares of 23.75% 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)
2026-04-07 2026-03-31 13F CIENA COM NEW 171779309 6,054 1,162 23.75 2,350 105.42 0.0360
2026-01-20 2025-12-31 13F CIENA COM NEW 171779309 4,892 -643 -11.62 1,144 41.94 0.0175
2025-10-21 2025-09-30 13F CIENA COM NEW 171779309 5,535 -466 -7.77 806 65.16 0.0127
2025-07-16 2025-06-30 13F CIENA COM NEW 171779309 6,001 -196 -3.16 488 30.48 0.0083
2025-05-02 2025-03-31 13F CIENA COM NEW 171779309 6,197 -1,278 -17.10 374 -40.92 0.0071
2025-02-10 2024-12-31 13F CIENA COM NEW 171779309 7,475 707 10.45 634 52.16 0.0120
2024-10-21 2024-09-30 13F CIENA COM NEW 171779309 6,768 -1,848 -21.45 417 0.24 0.0079
2024-07-29 2024-06-30 13F CIENA COM NEW 171779309 8,616 -542 -5.92 415 -8.19 0.0084
2024-05-03 2024-03-31 13F CIENA COM NEW 171779309 9,158 -1,558 -14.54 453 -6.22 0.0096
2024-02-01 2023-12-31 13F CIENA COM NEW 171779309 10,716 23 0.22 482 -4.55 0.0111
2023-11-03 2023-09-30 13F CIENA COM NEW 171779309 10,693 -126 -1.16 505 10.02 0.0132
2023-08-01 2023-06-30 13F CIENA COM NEW 171779309 10,819 -278 -2.51 460 -21.13 0.0117
2023-04-28 2023-03-31 13F CIENA COM NEW 171779309 11,097 -497 -4.29 583 -1.52 0.0159
2023-01-30 2022-12-31 13F CIENA COM NEW 171779309 11,594 1,673 16.86 591 47.38 0.0173
2022-11-08 2022-09-30 13F CIENA COM NEW 171779309 9,921 -571 -5.44 401 -16.28 0.0137
2022-08-10 2022-06-30 13F CIENA COM NEW 171779309 10,492 45 0.43 479 -24.33 0.0163
2022-05-02 2022-03-31 13F CIENA COM NEW 171779309 10,447 -75 -0.71 633 -21.85 0.0191
2022-01-25 2021-12-31 13F CIENA COM NEW 171779309 10,522 -139 -1.30 810 48.08 0.0249
2021-10-28 2021-09-30 13F CIENA COM NEW 171779309 10,661 -219 -2.01 547 -11.63 0.0189
2021-07-26 2021-06-30 13F CIENA COM NEW 171779309 10,880 345 3.27 619 7.47 0.0247
2021-04-30 2021-03-31 13F CIENA COM NEW 171779309 10,535 35 0.33 576 3.78 0.0255
2021-02-11 2020-12-31 13F CIENA COM NEW 171779309 10,500 -328 -3.03 555 29.07 0.0262
2020-11-03 2020-09-30 13F CIENA COM NEW 171779309 10,828 940 9.51 430 -19.78 0.0230
2020-07-30 2020-06-30 13F CIENA COM NEW 171779309 9,888 401 4.23 536 41.80 0.0324
2020-04-23 2020-03-31 13F CIENA COM NEW 171779309 9,487 -1,550 -14.04 378 -19.75 0.0327
2020-02-05 2019-12-31 13F CIENA COM NEW 171779309 11,037 490 4.65 471 13.77 0.0348
2019-10-16 2019-09-30 13F CIENA COM NEW 171779309 10,547 -18 -0.17 414 -4.83 0.0340
2019-07-31 2019-06-30 13F CIENA COM NEW 171779309 10,565 -462 -4.19 435 5.58 0.0376
2019-05-09 2019-03-31 13F CIENA COM NEW 171779309 11,027 2,930 36.19 412 49.82 0.0351
2019-02-13 2018-12-31 13F CIENA COM NEW 171779309 8,097 1,277 18.72 275 29.11 0.0256
2018-11-14 2018-09-30 13F CIENA COM NEW 171779309 6,820 1,286 23.24 213 44.90 0.0216
2018-08-14 2018-06-30 13F CIENA COM NEW 171779309 5,534 4,587 484.37 147 488.00 0.0164
2018-05-08 2018-03-31 13F CIENA COM NEW 171779309 947 947 25 0.0029
2016-07-29 2016-06-30 13F CIENA COM NEW 171779309 0 -28 -100.00 0 -100.00
2016-05-12 2016-03-31 13F CIENA COM NEW 171779309 28 -6 -17.65 1 0.00 0.0002
2016-01-22 2015-12-31 13F CIENA COM NEW 171779309 34 0 0.00 1 0.00 0.0002
2015-10-23 2015-09-30 13F CIENA COM NEW 171779309 34 0 0.00 1 0.00 0.0002
2015-07-15 2015-06-30 13F CIENA COM NEW 171779309 34 0 0.00 1 0.00 0.0002
2015-04-15 2015-03-31 13F CIENA COM NEW 171779309 34 34 1 0.0002
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.