Ciena Corporation
US ˙ NYSE ˙ US1717793095

SecurityCIEN / Ciena Corporation
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership67,502 shares
Latest Disclosed Value $ 26,206
Natixis Advisors, L.p. reports 16.28% decrease in ownership of CIEN / Ciena Corporation

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 67,502 shares of Ciena Corporation (US:CIEN) valued at $26,206,301 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 80,633 shares of Ciena Corporation. This represents a change in shares of -16.28% during the quarter. The current value of the position is $41,876,216 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)
2026-05-13 2026-03-31 13F CIENA CORP COM 171779309 67,502 -13,131 -16.28 26 44.44 0.0365
2026-02-10 2025-12-31 13F CIENA CORP COM 171779309 80,633 -108,991 -57.48 19 -33.33 0.0267
2025-11-13 2025-09-30 13F CIENA COM 171779309 189,624 -61,771 -24.57 28 35.00 0.0403
2025-08-13 2025-06-30 13F CIENA COM 171779309 251,395 112,748 81.32 20 150.00 0.0324
2025-05-08 2025-03-31 13F CIENA COM 171779309 138,647 -47,269 -25.42 8 -46.67 0.0155
2025-02-10 2024-12-31 13F CIENA COM 171779309 185,916 34,169 22.52 16 66.67 0.0295
2024-11-06 2024-09-30 13F CIENA COM 171779309 151,747 128,392 549.74 9 800.00 0.0182
2024-08-01 2024-06-30 13F CIENA COM 171779309 23,355 -12,931 -35.64 1 0.00 0.0024
2024-04-25 2024-03-31 13F CIENA COM 171779309 36,286 16,376 82.25 2 0.0041
2024-02-06 2023-12-31 13F CIENA COM 171779309 19,910 -74,138 -78.83 1 -100.00 0.0024
2023-11-13 2023-09-30 13F CIENA COM 171779309 94,048 10,374 12.40 4 33.33 0.0136
2023-08-15 2023-06-30 13F CIENA COM 171779309 83,674 -837,827 -90.92 4 -93.75 0.0110
2023-05-11 2023-03-31 13F CIENA COM 171779309 921,501 46,343 5.30 48 9.09 0.1666
2023-01-27 2022-12-31 13F CIENA COM 171779309 875,158 355,485 68.41 45 -99.79 0.1687
2022-11-14 2022-09-30 13F CIENA COM 171779309 519,673 -132,297 -20.29 21,010 -29.48 0.0889
2022-08-12 2022-06-30 13F CIENA COM 171779309 651,970 -169,568 -20.64 29,795 -40.18 0.1310
2022-05-12 2022-03-31 13F CIENA COM 171779309 821,538 38,770 4.95 49,810 -17.33 0.1899
2022-02-08 2021-12-31 13F CIENA COM 171779309 782,768 65,908 9.19 60,250 63.67 0.2301
2021-11-15 2021-09-30 13F CIENA COM 171779309 716,860 62,638 9.57 36,811 -1.10 0.1514
2021-08-12 2021-06-30 13F CIENA COM 171779309 654,222 53,291 8.87 37,219 13.19 0.1737
2021-05-05 2021-03-31 13F CIENA COM 171779309 600,931 200,816 50.19 32,882 55.50 0.1716
2021-02-12 2020-12-31 13F CIENA COM 171779309 400,115 189,090 89.61 21,146 152.46 0.1218
2020-11-12 2020-09-30 13F CIENA COM 171779309 211,025 -252,376 -54.46 8,376 -66.63 0.0527
2020-08-11 2020-06-30 13F CIENA COM 171779309 463,401 386,565 503.10 25,098 720.46 0.1666
2020-04-27 2020-03-31 13F CIENA COM 171779309 76,836 76,836 3,059 0.0249
2020-02-07 2019-12-31 13F CIENA COM 171779309 0 -21,822 -100.00 0 -100.00
2019-11-12 2019-09-30 13F CIENA COM 171779309 21,822 21,822 856 0.0068
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.