Ciena Corporation
MX ˙ BMV ˙ US1717793095
SecurityMX:CIEN / Ciena Corporation
InstitutionQuadrant Capital Group Llc
Latest Disclosed Ownership14,718 shares
Latest Disclosed Value $ 5,713,970
Quadrant Capital Group Llc reports 2.33% increase in ownership of CIEN / Ciena Corporation

On May 13, 2026 - Quadrant Capital Group Llc filed a 13F-HR/A form disclosing ownership of 14,718 shares of Ciena Corporation (MX:CIEN) valued at $5,713,970 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 14,383 shares of Ciena Corporation. This represents a change in shares of 2.33% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-13 2026-03-31 13F/A-1 CIENA COM NEW 171779309 14,718 335 2.33 5,714 69.88 0.1708
2026-05-11 2026-03-31 13F CIENA COM NEW 171779309 14,718 335 49 0.0369
2026-02-12 2025-12-31 13F CIENA COM NEW 171779309 14,383 186 1.31 3,364 62.62 0.1016
2025-11-13 2025-09-30 13F CIENA COM NEW 171779309 14,197 -154 -1.07 2,068 77.21 0.0672
2025-08-13 2025-06-30 13F CIENA COM NEW 171779309 14,351 8,130 130.69 1,167 211.20 0.0420
2025-05-13 2025-03-31 13F CIENA COM NEW 171779309 6,221 3,354 116.99 376 54.32 0.0140
2025-02-13 2024-12-31 13F CIENA COM NEW 171779309 2,867 -192 -6.28 243 29.26 0.0167
2024-11-12 2024-09-30 13F CIENA COM NEW 171779309 3,059 -165 -5.12 188 21.29 0.0131
2024-08-12 2024-06-30 13F CIENA COM NEW 171779309 3,224 209 6.93 155 4.03 0.0115
2024-05-15 2024-03-31 13F CIENA COM NEW 171779309 3,015 -59 -1.92 149 7.97 0.0118
2024-02-08 2023-12-31 13F CIENA COM NEW 171779309 3,074 35 1.15 138 -3.50 0.0119
2023-11-14 2023-09-30 13F CIENA COM NEW 171779309 3,039 1,352 80.14 144 101.41 0.0144
2023-08-10 2023-06-30 13F CIENA COM NEW 171779309 1,687 -1,536 -47.66 72 -57.99 0.0071
2023-05-11 2023-03-31 13F CIENA COM NEW 171779309 3,223 95 3.04 169 6.29 0.0176
2023-02-13 2022-12-31 13F CIENA COM NEW 171779309 3,128 1,832 141.36 159 205.77 0.0181
2022-11-10 2022-09-30 13F CIENA COM NEW 171779309 1,296 62 5.02 52 -7.14 0.0069
2022-08-09 2022-06-30 13F CIENA COM NEW 171779309 1,234 271 28.14 56 -3.45 0.0075
2022-05-06 2022-03-31 13F CIENA COM NEW 171779309 963 -100 -9.41 58 -29.27 0.0070
2022-02-01 2021-12-31 13F CIENA COM NEW 171779309 1,063 125 13.33 82 70.83 0.0098
2021-11-12 2021-09-30 13F CIENA COM NEW 171779309 938 248 35.94 48 23.08 0.0067
2021-08-09 2021-06-30 13F CIENA COM NEW 171779309 690 -470 -40.52 39 -38.10 0.0057
2021-05-12 2021-03-31 13F CIENA COM NEW 171779309 1,160 167 16.82 63 21.15 0.0102
2021-02-16 2020-12-31 13F CIENA COM NEW 171779309 993 -597 -37.55 52 -17.46 0.0097
2020-11-13 2020-09-30 13F CIENA COM NEW 171779309 1,590 548 52.59 63 12.50 0.0137
2020-08-13 2020-06-30 13F CIENA COM NEW 171779309 1,042 69 7.09 56 43.59 0.0124
2020-05-15 2020-03-31 13F Ciena Com 171779309 973 489 101.03 39 116.67 0.0065
2020-03-19 2019-12-31 13F/A-1 Ciena Com 171779309 484 223 85.44 18 100.00 0.0022
2020-02-03 2019-12-31 13F Ciena Com 171779309 484 223 18 60.8243
2019-10-24 2019-09-30 13F Ciena COM 171779309 261 0 0.00 9 0.00 0.0014
2019-07-24 2019-06-30 13F Ciena COM 171779309 261 0 0.00 9 12.50 0.0014
2019-04-29 2019-03-31 13F Ciena COM 171779309 261 0 0.00 8 0.00 0.0014
2019-01-17 2018-12-31 13F Ciena COM 171779309 261 0 0.00 8 33.33 0.0021
2018-10-29 2018-09-30 13F Ciena COM 171779309 261 0 0.00 6 20.00 0.0017
2018-08-08 2018-06-30 13F Ciena COM 171779309 261 95 57.23 5 66.67 0.0018
2018-05-10 2018-03-31 13F Ciena COM 171779309 166 104 167.74 3 200.00 0.0011
2018-01-31 2017-12-31 13F Ciena COM 171779309 62 0 0.00 1 0.00 0.0004
2017-10-13 2017-09-30 13F Ciena COM 171779309 62 0 0.00 1 0.0004
2017-08-14 2017-06-30 13F Ciena COM 171779309 62 0 0.00 0 -100.00
2017-04-10 2017-03-31 13F Ciena COM 171779309 62 0 0.00 1 0.00 0.0004
2017-01-11 2016-12-31 13F Ciena COM 171779309 62 0 0.00 1 0.00 0.0005
2016-10-25 2016-09-30 13F Ciena COM 171779309 62 0 0.00 1 0.00 0.0007
2016-07-28 2016-06-30 13F Ciena COM 171779309 62 9 16.98 1 0.00 0.0007
2016-04-27 2016-03-31 13F Ciena COM 171779309 53 -148 -73.63 1 -75.00 0.0006
2016-01-28 2015-12-31 13F Ciena COM 171779309 201 0 0.00 4 0.00 0.0028
2015-10-28 2015-09-30 13F Ciena COM 171779309 201 0 0.00 4 0.00 0.0028
2015-08-12 2015-06-30 13F Ciena COM 171779309 201 201 4 0.0025
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.