Ciena Corporation
MX ˙ BMV ˙ US1717793095
SecurityMX:CIEN / Ciena Corporation
InstitutionPrincipal Securities, Inc.
Latest Disclosed Ownership1,005 shares
Latest Disclosed Value $ 390,172
Principal Securities, Inc. reports 16.39% decrease in ownership of CIEN / Ciena Corporation

On May 13, 2026 - Principal Securities, Inc. filed a 13F-HR form disclosing ownership of 1,005 shares of Ciena Corporation (MX:CIEN) valued at $390,172 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,202 shares of Ciena Corporation. This represents a change in shares of -16.39% 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)
2026-05-13 2026-03-31 13F CIENA COM NEW 171779309 1,005 -197 -16.39 390 38.79 0.0057
2026-02-12 2025-12-31 13F CIENA COM NEW 171779309 1,202 -804 -40.08 281 -3.77 0.0043
2025-11-12 2025-09-30 13F CIENA COM NEW 171779309 2,006 -466 -18.85 292 45.27 0.0048
2025-08-11 2025-06-30 13F CIENA COM NEW 171779309 2,472 -593 -19.35 201 -22.39 0.0038
2025-04-30 2025-03-31 13F CIENA COM NEW 171779309 3,065 0 0.00 260 0.00 0.0058
2025-01-30 2024-12-31 13F CIENA COM NEW 171779309 3,065 -11,902 -79.52 260 -71.88 0.0059
2024-10-28 2024-09-30 13F CIENA COM NEW 171779309 14,967 3,942 35.76 922 73.45 0.0223
2024-07-31 2024-06-30 13F CIENA COM NEW 171779309 11,025 3,886 54.43 531 50.42 0.0146
2024-05-10 2024-03-31 13F CIENA COM NEW 171779309 7,139 -179 -2.45 353 7.29 0.0110
2024-05-10 2023-12-31 13F/A-1 CIENA COM NEW 171779309 7,318 7,318 329 0.0123
2024-02-07 2023-12-31 13F CIENA COM NEW 171779309 7,318 7,318 329 0.0123
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.